update to Java 13, fixing build

Testcontainers

aws/aws-rds-hello-world/.gitignore

@@ -0,0 +1,32 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

aws/aws-rds-hello-world/Dockerfile

@@ -0,0 +1,5 @@
+FROM openjdk:8-jdk-alpine
+ARG JAR_FILE=build/libs/*.jar
+COPY ${JAR_FILE} app.jar
+ENTRYPOINT ["java","-jar","/app.jar"]
+EXPOSE 8080

aws/aws-rds-hello-world/README.md

@@ -0,0 +1,25 @@
+# RDS Hello World Application
+
+This is a simple Spring Boot application which requires access to a PostgreSQL database.
+
+The application has a single endpoint `/hello` which prints out if the database connection was successful.
+
+Get it in a Docker image via `docker pull reflectoring/aws-rds-hello-world`.
+
+Use the image instead of your real application to test AWS CloudFormation stacks which need access to a database.
+
+## Testing AWS RDS connectivity with this application
+
+1. Create an RDS PostgreSQL database with the AWS console.
+2. Note the endpoint of your RDS database in the AWS console.
+3. Deploy the Docker container `reflectoring/aws-rds-hello-world` into AWS instead of your real application (this could be via a CloudFormation stack, manually, or however you are deploying your app).
+4. Configure your deployment in a way that Docker will pass the coordinates to your RDS database as environment variables, equivalent to this command:
+    ``` 
+    docker run \
+      -e SPRING_DATASOURCE_URL=':'<RDS-ENDPOINT>:5432/postgres \
+      -e SPRING_DATASOURCE_USERNAME=<USERNAME> \
+      -e SPRING_DATASOURCE_PASSWORD=<PASSWORD> \
+      -p 8080:8080 reflectoring/aws-rds-hello-world
+    ```
+5. If the Spring Boot application can connect to the database, it will start up sucessfully and serve a message on the endpoint `/hello`.
+

aws/aws-rds-hello-world/build.gradle

@@ -0,0 +1,31 @@
+plugins {
+	id 'org.springframework.boot' version '2.2.4.RELEASE'
+	id 'io.spring.dependency-management' version '1.0.9.RELEASE'
+	id 'java'
+}
+
+group = 'io.reflectoring'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '1.8'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+
+	// database
+	implementation 'org.flywaydb:flyway-core'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jdbc'
+	runtimeOnly 'org.postgresql:postgresql'
+	testRuntimeOnly 'org.postgresql:postgresql'
+
+	testImplementation('org.springframework.boot:spring-boot-starter-test') {
+		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
+	}
+}
+
+test {
+	useJUnitPlatform()
+}

aws/aws-rds-hello-world/docker-compose.yml

@@ -0,0 +1,18 @@
+version: '3.7'
+
+services:
+
+  postgres:
+    container_name: "rds-hello-world"
+    image: postgres
+    volumes:
+      - rds-hello-world:/var/lib/postgresql/data
+    ports:
+      - 5432:5432
+    environment:
+      - POSTGRES_USER=hello
+      - POSTGRES_PASSWORD=hello
+
+volumes:
+  rds-hello-world:
+    driver: local

aws/aws-rds-hello-world/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

aws/aws-rds-hello-world/gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

aws/aws-rds-hello-world/gradlew.bat

@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

aws/aws-rds-hello-world/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'aws-rds-hello-world'

aws/aws-rds-hello-world/src/main/java/io/reflectoring/awshelloworld/AwsHelloWorldApplication.java

@@ -0,0 +1,13 @@
+package io.reflectoring.awshelloworld;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class AwsHelloWorldApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(AwsHelloWorldApplication.class, args);
+	}
+
+}

aws/aws-rds-hello-world/src/main/java/io/reflectoring/awshelloworld/HelloWorldController.java

@@ -0,0 +1,23 @@
+package io.reflectoring.awshelloworld;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+class HelloWorldController {
+
+  private final UserRepository userRepository;
+
+  HelloWorldController(UserRepository userRepository) {
+    this.userRepository = userRepository;
+  }
+
+  @GetMapping("/hello")
+  String helloWorld(){
+
+    Iterable<User> users = userRepository.findAll();
+
+    return "Hello AWS! Successfully connected to the database!";
+  }
+
+}

aws/aws-rds-hello-world/src/main/java/io/reflectoring/awshelloworld/User.java

@@ -0,0 +1,38 @@
+package io.reflectoring.awshelloworld;
+
+import org.springframework.data.annotation.Id;
+import org.springframework.data.relational.core.mapping.Table;
+
+@Table("hello_user")
+public class User {
+
+    @Id
+    private Long id;
+
+    private String name;
+
+    public User(Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public User() {
+
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

aws/aws-rds-hello-world/src/main/java/io/reflectoring/awshelloworld/UserRepository.java

@@ -0,0 +1,6 @@
+package io.reflectoring.awshelloworld;
+
+import org.springframework.data.repository.CrudRepository;
+
+public interface UserRepository extends CrudRepository<User, Long> {
+}

aws/aws-rds-hello-world/src/main/resources/application.yml

@@ -0,0 +1,5 @@
+spring:
+  datasource:
+    url: jdbc:postgresql://localhost:5432/hello
+    username: hello
+    password: hello

aws/aws-rds-hello-world/src/main/resources/db/migration/V001__create_table_user.sql

@@ -0,0 +1,5 @@
+create table hello_user (
+    id varchar(36) not null unique,
+    name varchar(100) not null,
+    primary key(id)
+);

aws/cloudformation/ecs-in-two-public-subnets/README.md

@@ -0,0 +1,8 @@
+# Overview
+
+![ECS in two public subnets](ecs-in-two-public-subnets.svg)
+
+# Companion Blog Post
+
+[The AWS Journey Part 2: Deploying a Docker image from the Command Line with CloudFormation](https://reflectoring.io/aws-cloudformation-deploy-docker-image/)
+

aws/cloudformation/ecs-in-two-public-subnets/ecs-in-two-public-subnets.drawio

@@ -0,0 +1 @@
+<mxfile modified="2020-04-30T21:28:18.347Z" host="app.diagrams.net" agent="5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36" etag="X9Eef2gSXNvxkCnmY-_0" version="13.0.4" type="device"><diagram id="Ht1M8jgEwFfnCIfOTk4-" name="Page-1">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</diagram></mxfile>

aws/cloudformation/ecs-in-two-public-subnets/network.yml

@@ -0,0 +1,247 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Description: A network stack for deploying containers in AWS ECS.
+  This stack creates a VPC with two public subnets and a loadbalancer to balance traffic between those subnets.
+  Derived from a template at https://github.com/nathanpeck/aws-cloudformation-fargate.
+Resources:
+
+  VPC:
+    Type: AWS::EC2::VPC
+    Properties:
+      CidrBlock: '10.0.0.0/16'
+
+  PublicSubnetOne:
+    Type: AWS::EC2::Subnet
+    Properties:
+      AvailabilityZone:
+        Fn::Select:
+          - 0
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      VpcId: !Ref 'VPC'
+      CidrBlock: '10.0.1.0/24'
+      MapPublicIpOnLaunch: true
+
+  PublicSubnetTwo:
+    Type: AWS::EC2::Subnet
+    Properties:
+      AvailabilityZone:
+        Fn::Select:
+          - 1
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      VpcId: !Ref 'VPC'
+      CidrBlock: '10.0.2.0/24'
+      MapPublicIpOnLaunch: true
+
+  InternetGateway:
+    Type: AWS::EC2::InternetGateway
+
+  GatewayAttachement:
+    Type: AWS::EC2::VPCGatewayAttachment
+    Properties:
+      VpcId: !Ref 'VPC'
+      InternetGatewayId: !Ref 'InternetGateway'
+
+  PublicRouteTable:
+    Type: AWS::EC2::RouteTable
+    Properties:
+      VpcId: !Ref 'VPC'
+
+  PublicSubnetOneRouteTableAssociation:
+    Type: AWS::EC2::SubnetRouteTableAssociation
+    Properties:
+      SubnetId: !Ref PublicSubnetOne
+      RouteTableId: !Ref PublicRouteTable
+
+  PublicSubnetTwoRouteTableAssociation:
+    Type: AWS::EC2::SubnetRouteTableAssociation
+    Properties:
+      SubnetId: !Ref PublicSubnetTwo
+      RouteTableId: !Ref PublicRouteTable
+
+  PublicRoute:
+    Type: AWS::EC2::Route
+    DependsOn: GatewayAttachement
+    Properties:
+      RouteTableId: !Ref 'PublicRouteTable'
+      DestinationCidrBlock: '0.0.0.0/0'
+      GatewayId: !Ref 'InternetGateway'
+
+  PublicLoadBalancerSecurityGroup:
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: Access to the public facing load balancer
+      VpcId: !Ref 'VPC'
+      SecurityGroupIngress:
+        # Allow access to ALB from anywhere on the internet
+        - CidrIp: 0.0.0.0/0
+          IpProtocol: -1
+
+  PublicLoadBalancer:
+    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
+    Properties:
+      Scheme: internet-facing
+      Subnets:
+        # The load balancer is placed into the public subnets, so that traffic
+        # from the internet can reach the load balancer directly via the internet gateway
+        - !Ref PublicSubnetOne
+        - !Ref PublicSubnetTwo
+      SecurityGroups: [!Ref 'PublicLoadBalancerSecurityGroup']
+
+  DummyTargetGroupPublic:
+    Type: AWS::ElasticLoadBalancingV2::TargetGroup
+    Properties:
+      HealthCheckIntervalSeconds: 6
+      HealthCheckPath: /
+      HealthCheckProtocol: HTTP
+      HealthCheckTimeoutSeconds: 5
+      HealthyThresholdCount: 2
+      Name: "no-op"
+      Port: 80
+      Protocol: HTTP
+      UnhealthyThresholdCount: 2
+      VpcId: !Ref 'VPC'
+
+  PublicLoadBalancerListener:
+    Type: AWS::ElasticLoadBalancingV2::Listener
+    DependsOn:
+      - PublicLoadBalancer
+    Properties:
+      DefaultActions:
+        - TargetGroupArn: !Ref 'DummyTargetGroupPublic'
+          Type: 'forward'
+      LoadBalancerArn: !Ref 'PublicLoadBalancer'
+      Port: 80
+      Protocol: HTTP
+
+  ECSCluster:
+    Type: AWS::ECS::Cluster
+
+  ECSSecurityGroup:
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: Access to the ECS containers
+      VpcId: !Ref 'VPC'
+
+  ECSSecurityGroupIngressFromPublicALB:
+    Type: AWS::EC2::SecurityGroupIngress
+    Properties:
+      Description: Ingress from the public ALB
+      GroupId: !Ref 'ECSSecurityGroup'
+      IpProtocol: -1
+      SourceSecurityGroupId: !Ref 'PublicLoadBalancerSecurityGroup'
+
+  ECSSecurityGroupIngressFromSelf:
+    Type: AWS::EC2::SecurityGroupIngress
+    Properties:
+      Description: Ingress from other containers in the same security group
+      GroupId: !Ref 'ECSSecurityGroup'
+      IpProtocol: -1
+      SourceSecurityGroupId: !Ref 'ECSSecurityGroup'
+
+  ECSRole:
+    Type: AWS::IAM::Role
+    Properties:
+      AssumeRolePolicyDocument:
+        Statement:
+          - Effect: Allow
+            Principal:
+              Service: [ecs.amazonaws.com]
+            Action: ['sts:AssumeRole']
+      Path: /
+      Policies:
+        - PolicyName: ecs-service
+          PolicyDocument:
+            Statement:
+              - Effect: Allow
+                Action:
+                  # Rules which allow ECS to attach network interfaces to instances
+                  # on your behalf in order for awsvpc networking mode to work right
+                  - 'ec2:AttachNetworkInterface'
+                  - 'ec2:CreateNetworkInterface'
+                  - 'ec2:CreateNetworkInterfacePermission'
+                  - 'ec2:DeleteNetworkInterface'
+                  - 'ec2:DeleteNetworkInterfacePermission'
+                  - 'ec2:Describe*'
+                  - 'ec2:DetachNetworkInterface'
+
+                  # Rules which allow ECS to update load balancers on your behalf
+                  # with the information sabout how to send traffic to your containers
+                  - 'elasticloadbalancing:DeregisterInstancesFromLoadBalancer'
+                  - 'elasticloadbalancing:DeregisterTargets'
+                  - 'elasticloadbalancing:Describe*'
+                  - 'elasticloadbalancing:RegisterInstancesWithLoadBalancer'
+                  - 'elasticloadbalancing:RegisterTargets'
+                Resource: '*'
+
+  ECSTaskExecutionRole:
+    Type: AWS::IAM::Role
+    Properties:
+      AssumeRolePolicyDocument:
+        Statement:
+          - Effect: Allow
+            Principal:
+              Service: [ecs-tasks.amazonaws.com]
+            Action: ['sts:AssumeRole']
+      Path: /
+      Policies:
+        - PolicyName: AmazonECSTaskExecutionRolePolicy
+          PolicyDocument:
+            Statement:
+              - Effect: Allow
+                Action:
+                  # Allow the ECS Tasks to download images from ECR
+                  - 'ecr:GetAuthorizationToken'
+                  - 'ecr:BatchCheckLayerAvailability'
+                  - 'ecr:GetDownloadUrlForLayer'
+                  - 'ecr:BatchGetImage'
+
+                  # Allow the ECS tasks to upload logs to CloudWatch
+                  - 'logs:CreateLogStream'
+                  - 'logs:PutLogEvents'
+                Resource: '*'
+
+Outputs:
+  ClusterName:
+    Description: The name of the ECS cluster
+    Value: !Ref 'ECSCluster'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ClusterName' ] ]
+  ExternalUrl:
+    Description: The url of the external load balancer
+    Value: !Join ['', ['http://', !GetAtt 'PublicLoadBalancer.DNSName']]
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ExternalUrl' ] ]
+  ECSRole:
+    Description: The ARN of the ECS role
+    Value: !GetAtt 'ECSRole.Arn'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ECSRole' ] ]
+  ECSTaskExecutionRole:
+    Description: The ARN of the ECS role
+    Value: !GetAtt 'ECSTaskExecutionRole.Arn'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ECSTaskExecutionRole' ] ]
+  PublicListener:
+    Description: The ARN of the public load balancer's Listener
+    Value: !Ref PublicLoadBalancerListener
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PublicListener' ] ]
+  VPCId:
+    Description: The ID of the VPC that this stack is deployed in
+    Value: !Ref 'VPC'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'VPCId' ] ]
+  PublicSubnetOne:
+    Description: Public subnet one
+    Value: !Ref 'PublicSubnetOne'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PublicSubnetOne' ] ]
+  PublicSubnetTwo:
+    Description: Public subnet two
+    Value: !Ref 'PublicSubnetTwo'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PublicSubnetTwo' ] ]
+  ECSSecurityGroup:
+    Description: A security group used to allow ECS containers to receive traffic
+    Value: !Ref 'ECSSecurityGroup'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ECSSecurityGroup' ] ]

aws/cloudformation/ecs-in-two-public-subnets/service.yml

@@ -0,0 +1,139 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Description: Deploy a service on AWS Fargate, hosted in two public subnets and accessible via a public load balancer.
+  Derived from a template at https://github.com/nathanpeck/aws-cloudformation-fargate.
+Parameters:
+  StackName:
+    Type: String
+    Description: The name of the networking stack that
+      these resources are put into.
+  ServiceName:
+    Type: String
+    Description: A human-readable name for the service.
+  HealthCheckPath:
+    Type: String
+    Default: /health
+    Description: Path to perform the healthcheck on each instance.
+  HealthCheckIntervalSeconds:
+    Type: Number
+    Default: 5
+    Description: Number of seconds to wait between each health check.
+  ImageUrl:
+    Type: String
+    Description: The url of a docker image that will handle incoming traffic.
+  ContainerPort:
+    Type: Number
+    Default: 80
+    Description: The port number the application inside the docker container
+      is binding to.
+  ContainerCpu:
+    Type: Number
+    Default: 256
+    Description: How much CPU to give the container. 1024 is 1 CPU.
+  ContainerMemory:
+    Type: Number
+    Default: 512
+    Description: How much memory in megabytes to give the container.
+  Path:
+    Type: String
+    Default: "*"
+    Description: A path on the public load balancer that this service
+      should be connected to.
+  DesiredCount:
+    Type: Number
+    Default: 2
+    Description: How many copies of the service task to run.
+
+Resources:
+
+  TargetGroup:
+    Type: AWS::ElasticLoadBalancingV2::TargetGroup
+    Properties:
+      HealthCheckIntervalSeconds: !Ref 'HealthCheckIntervalSeconds'
+      HealthCheckPath: !Ref 'HealthCheckPath'
+      HealthCheckProtocol: HTTP
+      HealthCheckTimeoutSeconds: 5
+      HealthyThresholdCount: 2
+      TargetType: ip
+      Name: !Ref 'ServiceName'
+      Port: !Ref 'ContainerPort'
+      Protocol: HTTP
+      UnhealthyThresholdCount: 2
+      VpcId:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'StackName', 'VPCId']]
+
+  LoadBalancerRule:
+    Type: AWS::ElasticLoadBalancingV2::ListenerRule
+    Properties:
+      Actions:
+        - TargetGroupArn: !Ref 'TargetGroup'
+          Type: 'forward'
+      Conditions:
+        - Field: path-pattern
+          Values: [!Ref 'Path']
+      ListenerArn:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'StackName', 'PublicListener']]
+      Priority: 1
+
+  LogGroup:
+    Type: AWS::Logs::LogGroup
+    Properties:
+      LogGroupName: !Ref 'ServiceName'
+      RetentionInDays: 1
+
+  TaskDefinition:
+    Type: AWS::ECS::TaskDefinition
+    Properties:
+      Family: !Ref 'ServiceName'
+      Cpu: !Ref 'ContainerCpu'
+      Memory: !Ref 'ContainerMemory'
+      NetworkMode: awsvpc
+      RequiresCompatibilities:
+        - FARGATE
+      ExecutionRoleArn:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'StackName', 'ECSTaskExecutionRole']]
+      ContainerDefinitions:
+        - Name: !Ref 'ServiceName'
+          Cpu: !Ref 'ContainerCpu'
+          Memory: !Ref 'ContainerMemory'
+          Image: !Ref 'ImageUrl'
+          PortMappings:
+            - ContainerPort: !Ref 'ContainerPort'
+          LogConfiguration:
+            LogDriver: 'awslogs'
+            Options:
+              awslogs-group: !Ref 'ServiceName'
+              awslogs-region: !Ref AWS::Region
+              awslogs-stream-prefix: !Ref 'ServiceName'
+
+  Service:
+    Type: AWS::ECS::Service
+    DependsOn: LoadBalancerRule
+    Properties:
+      ServiceName: !Ref 'ServiceName'
+      Cluster:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'StackName', 'ClusterName']]
+      LaunchType: FARGATE
+      DeploymentConfiguration:
+        MaximumPercent: 200
+        MinimumHealthyPercent: 50
+      DesiredCount: !Ref 'DesiredCount'
+      NetworkConfiguration:
+        AwsvpcConfiguration:
+          AssignPublicIp: ENABLED
+          SecurityGroups:
+            - Fn::ImportValue:
+                !Join [':', [!Ref 'StackName', 'ECSSecurityGroup']]
+          Subnets:
+            - Fn::ImportValue:
+                !Join [':', [!Ref 'StackName', 'PublicSubnetOne']]
+            - Fn::ImportValue:
+                !Join [':', [!Ref 'StackName', 'PublicSubnetTwo']]
+      TaskDefinition: !Ref 'TaskDefinition'
+      LoadBalancers:
+        - ContainerName: !Ref 'ServiceName'
+          ContainerPort: !Ref 'ContainerPort'
+          TargetGroupArn: !Ref 'TargetGroup'

aws/cloudformation/rds-in-private-subnet/README.md

@@ -0,0 +1,7 @@
+# Overview
+
+![RDS in private subnet](rds-in-private-subnet.svg)
+
+# Companion Blog Post
+
+TO DO

aws/cloudformation/rds-in-private-subnet/database.yml

@@ -0,0 +1,88 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Description: A stack that creates an RDS instance and places it into two subnets
+Parameters:
+  NetworkStackName:
+    Type: String
+    Description: The name of the networking stack that this stack will build upon.
+  DBInstanceClass:
+    Type: String
+    Description: The ID of the second subnet to place the RDS instance into.
+    Default: 'db.t2.micro'
+  DBName:
+    Type: String
+    Description: The name of the database that is created within the PostgreSQL instance.
+  DBUsername:
+    Type: String
+    Description: The master user name for the PostgreSQL instance.
+Resources:
+
+  Secret:
+    Type: "AWS::SecretsManager::Secret"
+    Properties:
+      Name: !Ref 'DBUsername'
+      GenerateSecretString:
+        # This will generate a JSON object with the keys "username" and password.
+        SecretStringTemplate: !Join ['', ['{"username": "', !Ref 'DBUsername' ,'"}']]
+        GenerateStringKey: "password"
+        PasswordLength: 32
+        ExcludeCharacters: '"@/\'
+
+  DBSubnetGroup:
+    Type: AWS::RDS::DBSubnetGroup
+    Properties:
+      DBSubnetGroupDescription: Subnet group for the RDS instance
+      DBSubnetGroupName: DBSubnetGroup
+      SubnetIds:
+        - Fn::ImportValue:
+            !Join [':', [!Ref 'NetworkStackName', 'PrivateSubnetOne']]
+        - Fn::ImportValue:
+            !Join [':', [!Ref 'NetworkStackName', 'PrivateSubnetTwo']]
+
+  PostgresInstance:
+    Type: AWS::RDS::DBInstance
+    Properties:
+      AllocatedStorage: 20
+      AvailabilityZone:
+        Fn::Select:
+          - 0
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      DBInstanceClass: !Ref 'DBInstanceClass'
+      DBName: !Ref 'DBName'
+      DBSubnetGroupName: !Ref 'DBSubnetGroup'
+      Engine: postgres
+      EngineVersion: 11.5
+      MasterUsername: !Ref 'DBUsername'
+      MasterUserPassword: !Join ['', ['{{resolve:secretsmanager:', !Ref Secret, ':SecretString:password}}' ]]
+      PubliclyAccessible: false
+      VPCSecurityGroups:
+        - Fn::ImportValue:
+            !Join [':', [!Ref 'NetworkStackName', 'DBSecurityGroupId']]
+
+  SecretRDSInstanceAttachment:
+    Type: "AWS::SecretsManager::SecretTargetAttachment"
+    Properties:
+      SecretId: !Ref Secret
+      TargetId: !Ref PostgresInstance
+      TargetType: AWS::RDS::DBInstance
+
+Outputs:
+  EndpointAddress:
+    Description: Address of the RDS endpoint.
+    Value: !GetAtt 'PostgresInstance.Endpoint.Address'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'EndpointAddress' ] ]
+  EndpointPort:
+    Description: Port of the RDS endpoint.
+    Value: !GetAtt 'PostgresInstance.Endpoint.Port'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'EndpointPort' ] ]
+  DBName:
+    Description: The name of the database that is created within the PostgreSQL instance.
+    Value: !Ref DBName
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'DBName' ] ]
+  Secret:
+    Description: Reference to the secret containing the password to the database.
+    Value: !Ref 'Secret'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'Secret' ] ]

aws/cloudformation/rds-in-private-subnet/network.yml

@@ -0,0 +1,298 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Description: A network stack for deploying containers in AWS ECS.
+  This stack creates a VPC with two public subnets and a loadbalancer to balance traffic between those subnets.
+  Derived from a template at https://github.com/nathanpeck/aws-cloudformation-fargate.
+Resources:
+
+  VPC:
+    Type: AWS::EC2::VPC
+    Properties:
+      CidrBlock: '10.0.0.0/16'
+
+  PublicSubnetOne:
+    Type: AWS::EC2::Subnet
+    Properties:
+      AvailabilityZone:
+        Fn::Select:
+          - 0
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      VpcId: !Ref 'VPC'
+      CidrBlock: '10.0.1.0/24'
+      MapPublicIpOnLaunch: true
+
+  PublicSubnetTwo:
+    Type: AWS::EC2::Subnet
+    Properties:
+      AvailabilityZone:
+        Fn::Select:
+          - 1
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      VpcId: !Ref 'VPC'
+      CidrBlock: '10.0.2.0/24'
+      MapPublicIpOnLaunch: true
+
+  InternetGateway:
+    Type: AWS::EC2::InternetGateway
+
+  GatewayAttachement:
+    Type: AWS::EC2::VPCGatewayAttachment
+    Properties:
+      VpcId: !Ref 'VPC'
+      InternetGatewayId: !Ref 'InternetGateway'
+
+  PublicRouteTable:
+    Type: AWS::EC2::RouteTable
+    Properties:
+      VpcId: !Ref 'VPC'
+
+  PublicSubnetOneRouteTableAssociation:
+    Type: AWS::EC2::SubnetRouteTableAssociation
+    Properties:
+      SubnetId: !Ref PublicSubnetOne
+      RouteTableId: !Ref PublicRouteTable
+
+  PublicSubnetTwoRouteTableAssociation:
+    Type: AWS::EC2::SubnetRouteTableAssociation
+    Properties:
+      SubnetId: !Ref PublicSubnetTwo
+      RouteTableId: !Ref PublicRouteTable
+
+  PublicRoute:
+    Type: AWS::EC2::Route
+    DependsOn: GatewayAttachement
+    Properties:
+      RouteTableId: !Ref 'PublicRouteTable'
+      DestinationCidrBlock: '0.0.0.0/0'
+      GatewayId: !Ref 'InternetGateway'
+
+  PublicLoadBalancerSecurityGroup:
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: Access to the public facing load balancer
+      VpcId: !Ref 'VPC'
+      SecurityGroupIngress:
+        # Allow access to ALB from anywhere on the internet
+        - CidrIp: 0.0.0.0/0
+          IpProtocol: -1
+
+  PublicLoadBalancer:
+    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
+    Properties:
+      Scheme: internet-facing
+      Subnets:
+        # The load balancer is placed into the public subnets, so that traffic
+        # from the internet can reach the load balancer directly via the internet gateway
+        - !Ref PublicSubnetOne
+        - !Ref PublicSubnetTwo
+      SecurityGroups: [!Ref 'PublicLoadBalancerSecurityGroup']
+
+  DummyTargetGroupPublic:
+    Type: AWS::ElasticLoadBalancingV2::TargetGroup
+    Properties:
+      HealthCheckIntervalSeconds: 6
+      HealthCheckPath: /
+      HealthCheckProtocol: HTTP
+      HealthCheckTimeoutSeconds: 5
+      HealthyThresholdCount: 2
+      Name: "no-op"
+      Port: 80
+      Protocol: HTTP
+      UnhealthyThresholdCount: 2
+      VpcId: !Ref 'VPC'
+
+  PublicLoadBalancerListener:
+    Type: AWS::ElasticLoadBalancingV2::Listener
+    DependsOn:
+      - PublicLoadBalancer
+    Properties:
+      DefaultActions:
+        - TargetGroupArn: !Ref 'DummyTargetGroupPublic'
+          Type: 'forward'
+      LoadBalancerArn: !Ref 'PublicLoadBalancer'
+      Port: 80
+      Protocol: HTTP
+
+  ECSCluster:
+    Type: AWS::ECS::Cluster
+
+  ECSSecurityGroup:
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: Access to the ECS containers
+      VpcId: !Ref 'VPC'
+
+  ECSSecurityGroupIngressFromPublicALB:
+    Type: AWS::EC2::SecurityGroupIngress
+    Properties:
+      Description: Ingress from the public ALB
+      GroupId: !Ref 'ECSSecurityGroup'
+      IpProtocol: -1
+      SourceSecurityGroupId: !Ref 'PublicLoadBalancerSecurityGroup'
+
+  ECSSecurityGroupIngressFromSelf:
+    Type: AWS::EC2::SecurityGroupIngress
+    Properties:
+      Description: Ingress from other containers in the same security group
+      GroupId: !Ref 'ECSSecurityGroup'
+      IpProtocol: -1
+      SourceSecurityGroupId: !Ref 'ECSSecurityGroup'
+
+  ECSRole:
+    Type: AWS::IAM::Role
+    Properties:
+      AssumeRolePolicyDocument:
+        Statement:
+          - Effect: Allow
+            Principal:
+              Service: [ecs.amazonaws.com]
+            Action: ['sts:AssumeRole']
+      Path: /
+      Policies:
+        - PolicyName: ecs-service
+          PolicyDocument:
+            Statement:
+              - Effect: Allow
+                Action:
+                  # Rules which allow ECS to attach network interfaces to instances
+                  # on your behalf in order for awsvpc networking mode to work right
+                  - 'ec2:AttachNetworkInterface'
+                  - 'ec2:CreateNetworkInterface'
+                  - 'ec2:CreateNetworkInterfacePermission'
+                  - 'ec2:DeleteNetworkInterface'
+                  - 'ec2:DeleteNetworkInterfacePermission'
+                  - 'ec2:Describe*'
+                  - 'ec2:DetachNetworkInterface'
+
+                  # Rules which allow ECS to update load balancers on your behalf
+                  # with the information sabout how to send traffic to your containers
+                  - 'elasticloadbalancing:DeregisterInstancesFromLoadBalancer'
+                  - 'elasticloadbalancing:DeregisterTargets'
+                  - 'elasticloadbalancing:Describe*'
+                  - 'elasticloadbalancing:RegisterInstancesWithLoadBalancer'
+                  - 'elasticloadbalancing:RegisterTargets'
+                Resource: '*'
+
+  ECSTaskExecutionRole:
+    Type: AWS::IAM::Role
+    Properties:
+      AssumeRolePolicyDocument:
+        Statement:
+          - Effect: Allow
+            Principal:
+              Service: [ecs-tasks.amazonaws.com]
+            Action: ['sts:AssumeRole']
+      Path: /
+      Policies:
+        - PolicyName: AmazonECSTaskExecutionRolePolicy
+          PolicyDocument:
+            Statement:
+              - Effect: Allow
+                Action:
+                  # Allow the ECS Tasks to download images from ECR
+                  - 'ecr:GetAuthorizationToken'
+                  - 'ecr:BatchCheckLayerAvailability'
+                  - 'ecr:GetDownloadUrlForLayer'
+                  - 'ecr:BatchGetImage'
+
+                  # Allow the ECS tasks to upload logs to CloudWatch
+                  - 'logs:CreateLogStream'
+                  - 'logs:PutLogEvents'
+                Resource: '*'
+
+  PrivateSubnetOne:
+    Type: AWS::EC2::Subnet
+    Properties:
+      AvailabilityZone:
+        Fn::Select:
+          - 0
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      VpcId: !Ref 'VPC'
+      CidrBlock: '10.0.101.0/24'
+      MapPublicIpOnLaunch: false
+
+  PrivateSubnetTwo:
+    Type: AWS::EC2::Subnet
+    Properties:
+      AvailabilityZone:
+        Fn::Select:
+          - 1
+          - Fn::GetAZs: {Ref: 'AWS::Region'}
+      VpcId: !Ref 'VPC'
+      CidrBlock: '10.0.102.0/24'
+      MapPublicIpOnLaunch: false
+
+  DBSecurityGroup:
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: Access to the RDS instance
+      VpcId: !Ref 'VPC'
+
+  DBSecurityGroupIngressFromECS:
+    Type: AWS::EC2::SecurityGroupIngress
+    Properties:
+      Description: Ingress from the ECS containers to the RDS instance
+      GroupId: !Ref 'DBSecurityGroup'
+      IpProtocol: -1
+      SourceSecurityGroupId: !Ref 'ECSSecurityGroup'
+
+Outputs:
+  PrivateSubnetOne:
+    Description: Private subnet one
+    Value: !Ref 'PrivateSubnetOne'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PrivateSubnetOne' ] ]
+  PrivateSubnetTwo:
+    Description: Private subnet two
+    Value: !Ref 'PrivateSubnetTwo'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PrivateSubnetTwo' ] ]
+  DBSecurityGroupId:
+    Description: ID of the security group that an RDS instance can be placed into.
+    Value: !Ref 'DBSecurityGroup'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'DBSecurityGroupId' ] ]
+  ClusterName:
+    Description: The name of the ECS cluster
+    Value: !Ref 'ECSCluster'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ClusterName' ] ]
+  ExternalUrl:
+    Description: The url of the external load balancer
+    Value: !Join ['', ['http://', !GetAtt 'PublicLoadBalancer.DNSName']]
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ExternalUrl' ] ]
+  ECSRole:
+    Description: The ARN of the ECS role
+    Value: !GetAtt 'ECSRole.Arn'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ECSRole' ] ]
+  ECSTaskExecutionRole:
+    Description: The ARN of the ECS role
+    Value: !GetAtt 'ECSTaskExecutionRole.Arn'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ECSTaskExecutionRole' ] ]
+  PublicListener:
+    Description: The ARN of the public load balancer's Listener
+    Value: !Ref PublicLoadBalancerListener
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PublicListener' ] ]
+  VPCId:
+    Description: The ID of the VPC that this stack is deployed in
+    Value: !Ref 'VPC'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'VPCId' ] ]
+  PublicSubnetOne:
+    Description: Public subnet one
+    Value: !Ref 'PublicSubnetOne'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PublicSubnetOne' ] ]
+  PublicSubnetTwo:
+    Description: Public subnet two
+    Value: !Ref 'PublicSubnetTwo'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'PublicSubnetTwo' ] ]
+  ECSSecurityGroup:
+    Description: A security group used to allow ECS containers to receive traffic
+    Value: !Ref 'ECSSecurityGroup'
+    Export:
+      Name: !Join [ ':', [ !Ref 'AWS::StackName', 'ECSSecurityGroup' ] ]

aws/cloudformation/rds-in-private-subnet/rds-in-private-subnet.drawio

@@ -0,0 +1 @@
+<mxfile modified="2020-05-11T21:18:00.281Z" host="app.diagrams.net" agent="5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.149 Safari/537.36" etag="d22WT4Cb11cg7E6o-Mdr" version="13.0.9" type="device"><diagram id="Ht1M8jgEwFfnCIfOTk4-" name="Page-1">7VvZcuI4FP0aHpuyJK+PYUk6VemaTNHTyxNlsGI8MRYtiy1fP5KRwZbEkkBI00OKqljXspZ7z7mLDA3UHi/uaDgZfSERThvQihYN1GlACJDj8H9CslxJPM9eCWKaRLLTRtBLXrAUWlI6TSKc1zoyQlKWTOrCIckyPGQ1WUgpmde7PZG0PuskjLEm6A3DVJd+TyI2klLgBpsbn3ESj+TUPvRWN8Zh2VnuJB+FEZlXRKjbQG1KCFtdjRdtnArllXpZPXe75e56YRRn7JAHHuJp6+UXX9i3PB/cv7TDr5/+/SRHmYXpVG74cTpIk6FY73SQYSbXzpalQiYkyVihVKfFP3zOttVw+J22aDWhowjUtlcXAL0lxqgL1LZXFwB1eKDMD9QFVgRaqza8pcxvVRbIP6hFpixNMtxew8/iwpiGUcLN0iYpoVyWkYxrrzVi45S3AL+cjxKGe5NwKLQ659ThsieSMUkAAMu2VLx4hgNoIq7Hi1hwrRnOc7sZUzKdFFPecwoY7/ZzPJzShC37m849RskzlsvNi0a52AZE0PZ9YIslJGlakXeDW9R1uXyGKUs4SW7SJBaTMiKGDWUrxU9MDMu3l2TxQ9HqIEtuyTRPFOYjHMnlSEjyKfBiK9bBmkHc9WAyxowueRf5AHIk6aTXQaU7mVc47EvZqEJf4IICIYX7kK4jXg+/YRe/kAQzk22Eh3Dxcu9977wMnl37S/SrP/hUeoIK2749tq8Mu3yGzSbDg3kkl3oiCt3ctLyWb6aQxhcDq7ZSCLh1CgFLp5BrGyiEAut4/hiDla0HK5rMQoav0eoP4tL/L1o5wQdHq0U6ve3jv2af7eXPX2zwzwu+m5pSwyvbrmz7Hdh2VGBT2QbgmdlmjG2OxrYO36zVk0Sz7grzqIQz5BWawZwbt+27VUWCrVZSYaXYZD2UYs0T+EAXKlZxDFYptV9LN8AJ0g1juo6utfHV//15/k+tjc/u/4xkA57Gtm67JzwgprOEQ+G3dn3HGcQ/wPUhU6X1bq5Pj0YN6KZivwN+EYuLm8mE+8KQJZxZ5T1a3nwgYaRLue7CbIhpeYcvbT2cZl+j86hxobTjQzjA6SPJk2ItqDMgjJHxXiYOucX4Wmqux+BGUDPc7LSf8o31B+U+NCdw6/gOsrd7uROgBdp1tEDXagKkl+aBjhcPvhNc/P1wuRfKLmKmG46FGbJBPik0oqLkjpcY83B5YSBJ5P76sVy+GRvuu2Jj7SU22PhYYARbnPrXMH8+zJhqVETwVsyvKVEo2PO7VpV8nYTygVb2zggVGlCN0rGcNg89htjxVPydAU77Upswn6zU8ZQsxDrMuQ7FOZnSIV5lOi3eNOU8eJifBmk2UGKWryPNM4Qs770iFtSzdQ1gOIpxqVkBBxKTLEy7G2nVLDiLbsT7Q2HclAyfhSgdFO3SxgVsQsrKfpLI/MnbJF17Cy0psZ2WK2DKE84sWiOL24Iuf1QbP0WD59ey2VlUb3aW1dYjpgnXo4DW7jRxBZJdepSU5fuKMdvv84VOdwKmmsSUR8gUpzyczuqvWE2QkMM9irpqAz6lgIeBq+Wlq33K56ovRZWhgFJ2Il/PcVeq0MYqYLre6BHIda/IPQC5ewHpfBwgoXVCRCrVAArOj0hTPndJiHw7iIKPAxGyAhVEb0OQXX7npkSQbTWtyh84CEzcECIJX3eTZ1vblw81DuxcpdYfOAqWVys4LbL1hHRXpXKRBQh8femx/mrS5sSr/LITOlHVqhYmgZ4uBk3D8a5jH58wGl9vwf1I4NZiMcW9vx94x/uM+6dMHERdFCxolOt4gF0PFV8aeL9S1LXtmsWBZ6/DWNXoUDe5v8N1HmXySy8Rtpplb1ZvSOp3keJDwh9Qwh+0m77/tgjoAnNsOXXMc3bHsNf2PzrmGd8s6qi/nsH8LmcwR70yVc9gkGs3TXH1nY5hjGC7+Fp2kbAf5dz8ulLJ8tamkBWNZaVhLmMVP/o23+3ovns7zz/EVSPrrZWK6g8PLHTPXZvY1hn8tP4C9MKoc/pjoNfyZ1f8Oyz3OQt/7KBekEOVBE0L2bYPPcd3oeW9MQdybGVYHh38wHUc4PHQgdR3PqdKidz6bhTq7O2/L4VS64ojUyje3PwCZ9V98zsm1P0P</diagram></mxfile>

aws/cloudformation/rds-in-private-subnet/service.yml

@@ -0,0 +1,164 @@
+AWSTemplateFormatVersion: '2010-09-09'
+Description: Deploy a service on AWS Fargate, hosted in two public subnets and accessible via a public load balancer.
+  Derived from a template at https://github.com/nathanpeck/aws-cloudformation-fargate.
+Parameters:
+  NetworkStackName:
+    Type: String
+    Description: The name of the networking stack that
+      these resources are put into.
+  DatabaseStackName:
+    Type: String
+    Description: The name of the database stack with the database this service should connect to.
+  ServiceName:
+    Type: String
+    Description: A human-readable name for the service.
+  HealthCheckPath:
+    Type: String
+    Default: /health
+    Description: Path to perform the healthcheck on each instance.
+  HealthCheckIntervalSeconds:
+    Type: Number
+    Default: 5
+    Description: Number of seconds to wait between each health check.
+  ImageUrl:
+    Type: String
+    Description: The url of a docker image that will handle incoming traffic.
+  ContainerPort:
+    Type: Number
+    Default: 80
+    Description: The port number the application inside the docker container
+      is binding to.
+  ContainerCpu:
+    Type: Number
+    Default: 256
+    Description: How much CPU to give the container. 1024 is 1 CPU.
+  ContainerMemory:
+    Type: Number
+    Default: 512
+    Description: How much memory in megabytes to give the container.
+  Path:
+    Type: String
+    Default: "*"
+    Description: A path on the public load balancer that this service
+      should be connected to.
+  DesiredCount:
+    Type: Number
+    Default: 2
+    Description: How many copies of the service task to run.
+
+Resources:
+
+  TargetGroup:
+    Type: AWS::ElasticLoadBalancingV2::TargetGroup
+    Properties:
+      HealthCheckIntervalSeconds: !Ref 'HealthCheckIntervalSeconds'
+      HealthCheckPath: !Ref 'HealthCheckPath'
+      HealthCheckProtocol: HTTP
+      HealthCheckTimeoutSeconds: 5
+      HealthyThresholdCount: 2
+      TargetType: ip
+      Name: !Ref 'ServiceName'
+      Port: !Ref 'ContainerPort'
+      Protocol: HTTP
+      UnhealthyThresholdCount: 2
+      VpcId:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'NetworkStackName', 'VPCId']]
+
+  LoadBalancerRule:
+    Type: AWS::ElasticLoadBalancingV2::ListenerRule
+    Properties:
+      Actions:
+        - TargetGroupArn: !Ref 'TargetGroup'
+          Type: 'forward'
+      Conditions:
+        - Field: path-pattern
+          Values: [!Ref 'Path']
+      ListenerArn:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'NetworkStackName', 'PublicListener']]
+      Priority: 1
+
+  LogGroup:
+    Type: AWS::Logs::LogGroup
+    Properties:
+      LogGroupName: !Ref 'ServiceName'
+      RetentionInDays: 1
+
+  TaskDefinition:
+    Type: AWS::ECS::TaskDefinition
+    Properties:
+      Family: !Ref 'ServiceName'
+      Cpu: !Ref 'ContainerCpu'
+      Memory: !Ref 'ContainerMemory'
+      NetworkMode: awsvpc
+      RequiresCompatibilities:
+        - FARGATE
+      ExecutionRoleArn:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'NetworkStackName', 'ECSTaskExecutionRole']]
+      ContainerDefinitions:
+        - Name: !Ref 'ServiceName'
+          Cpu: !Ref 'ContainerCpu'
+          Memory: !Ref 'ContainerMemory'
+          Image: !Ref 'ImageUrl'
+          Environment:
+            - Name: SPRING_DATASOURCE_URL
+              Value: !Join
+                - ''
+                - - 'jdbc:postgresql://'
+                  - Fn::ImportValue: !Join [':', [!Ref 'DatabaseStackName', 'EndpointAddress']]
+                  - ':'
+                  - Fn::ImportValue: !Join [':', [!Ref 'DatabaseStackName', 'EndpointPort']]
+                  - '/'
+                  - Fn::ImportValue: !Join [':', [!Ref 'DatabaseStackName', 'DBName']]
+            - Name: SPRING_DATASOURCE_USERNAME
+              Value: !Join
+                - ''
+                - - '{{resolve:secretsmanager:'
+                  - Fn::ImportValue: !Join [':', [!Ref 'DatabaseStackName', 'Secret']]
+                  - ':SecretString:username}}'
+            - Name: SPRING_DATASOURCE_PASSWORD
+              Value: !Join
+                - ''
+                - - '{{resolve:secretsmanager:'
+                  - Fn::ImportValue: !Join [':', [!Ref 'DatabaseStackName', 'Secret']]
+                  - ':SecretString:password}}'
+          PortMappings:
+            - ContainerPort: !Ref 'ContainerPort'
+          LogConfiguration:
+            LogDriver: 'awslogs'
+            Options:
+              awslogs-group: !Ref 'ServiceName'
+              awslogs-region: !Ref AWS::Region
+              awslogs-stream-prefix: !Ref 'ServiceName'
+
+  Service:
+    Type: AWS::ECS::Service
+    DependsOn: LoadBalancerRule
+    Properties:
+      ServiceName: !Ref 'ServiceName'
+      Cluster:
+        Fn::ImportValue:
+          !Join [':', [!Ref 'NetworkStackName', 'ClusterName']]
+      LaunchType: FARGATE
+      DeploymentConfiguration:
+        MaximumPercent: 200
+        MinimumHealthyPercent: 50
+      DesiredCount: !Ref 'DesiredCount'
+      NetworkConfiguration:
+        AwsvpcConfiguration:
+          AssignPublicIp: ENABLED
+          SecurityGroups:
+            - Fn::ImportValue:
+                !Join [':', [!Ref 'NetworkStackName', 'ECSSecurityGroup']]
+          Subnets:
+            - Fn::ImportValue:
+                !Join [':', [!Ref 'NetworkStackName', 'PublicSubnetOne']]
+            - Fn::ImportValue:
+                !Join [':', [!Ref 'NetworkStackName', 'PublicSubnetTwo']]
+      TaskDefinition: !Ref 'TaskDefinition'
+      LoadBalancers:
+        - ContainerName: !Ref 'ServiceName'
+          ContainerPort: !Ref 'ContainerPort'
+          TargetGroupArn: !Ref 'TargetGroup'

build-all.sh

@@ -10,7 +10,7 @@ build_gradle_module() {
   echo "+++"
   cd $MODULE_PATH && {
     chmod +x gradlew
-    ./gradlew clean build --info --stacktrace
+    ./gradlew clean build
     if [ $? -ne 0 ]
     then
       echo ""
@@ -54,9 +54,9 @@ build_maven_module() {
   }
 }
 
-chmod +x gradlew
-
+build_maven_module "spring-boot/dependency-injection"
 build_maven_module "spring-boot/spring-boot-openapi"
+build_maven_module "spring-boot/data-migration/liquibase"
 build_gradle_module "spring-boot/boundaries"
 build_gradle_module "spring-boot/argumentresolver"
 build_gradle_module "spring-data/spring-data-jdbc-converter"
@@ -85,6 +85,7 @@ build_gradle_module "spring-boot/static"
 build_gradle_module "spring-boot/validation"
 build_gradle_module "spring-boot/profiles"
 build_gradle_module "spring-boot/password-encoding"
+build_gradle_module "spring-boot/testcontainers"
 build_gradle_module "spring-cloud/feign-with-spring-data-rest"
 build_gradle_module "spring-cloud/sleuth-downstream-service"
 build_gradle_module "spring-cloud/sleuth-upstream-service"

solid/src/main/java/io/reflectoring/solid/isp/AdaptedBurgerOrder.java

@@ -0,0 +1,13 @@
+package io.reflectoring.solid.isp;
+
+class AdaptedBurgerOrder implements IAdapterOrderForBurger {
+    private final IOrder burgerOrder;
+    public AdaptedBurgerOrder(IOrder burgerOrder){
+        this.burgerOrder = burgerOrder;
+    }
+    @Override
+    public void orderBurger(int quantity) {
+        burgerOrder.orderBurger(quantity);
+    }
+}
+

solid/src/main/java/io/reflectoring/solid/isp/AdaptedFriesOrder.java

@@ -0,0 +1,13 @@
+package io.reflectoring.solid.isp;
+
+class AdaptedFriesOrder implements IAdapterOrderForFries {
+    private final IOrder friesOrder;
+    public AdaptedFriesOrder(IOrder friesOrder){
+        this.friesOrder = friesOrder;
+    }
+
+    @Override
+    public void orderFries(int quantity) {
+        friesOrder.orderFries(quantity);
+    }
+}

solid/src/main/java/io/reflectoring/solid/isp/BurgerOrder.java

@@ -0,0 +1,13 @@
+package io.reflectoring.solid.isp;
+
+class BurgerOrder implements IOrder {
+    @Override
+    public void orderBurger(int quantity) {
+
+    }
+
+    @Override
+    public void orderFries(int fries) {
+        throw new UnsupportedOperationException("No fries in Burger only order");
+    }
+}

solid/src/main/java/io/reflectoring/solid/isp/IAdapterOrderForBurger.java

@@ -0,0 +1,5 @@
+package io.reflectoring.solid.isp;
+
+interface IAdapterOrderForBurger {
+    void orderBurger(int quantity);
+}

solid/src/main/java/io/reflectoring/solid/isp/IAdapterOrderForFries.java

@@ -0,0 +1,5 @@
+package io.reflectoring.solid.isp;
+
+interface IAdapterOrderForFries {
+    void orderFries(int quantity);
+}

solid/src/main/java/io/reflectoring/solid/isp/IBurgerOrder.java

@@ -0,0 +1,5 @@
+package io.reflectoring.solid.isp;
+
+interface IBurgerOrder{
+    void orderBurger(int quantity);
+}

solid/src/main/java/io/reflectoring/solid/isp/IFriesOrder.java

@@ -0,0 +1,5 @@
+package io.reflectoring.solid.isp;
+
+interface IFriesOrder {
+    void orderFries(int quantity);
+}

solid/src/main/java/io/reflectoring/solid/isp/IOrder.java

@@ -0,0 +1,6 @@
+package io.reflectoring.solid.isp;
+
+interface IOrder {
+    void orderBurger(int quantity);
+    void orderFries(int fries);
+}

spring-boot/argumentresolver/src/main/java/io/reflectoring/argumentresolver/GitRepositoryArgumentResolver.java

@@ -32,12 +32,7 @@ class GitRepositoryArgumentResolver implements HandlerMethodArgumentResolver {
         .substring(0, requestPath.indexOf("/", 1))
         .replaceAll("^/", "");
 
-    Optional<GitRepository> repository = gitRepositoryFinder.findBySlug(slug);
-
-    if (repository.isEmpty()) {
-      throw new NotFoundException();
-    }
-
-    return repository.get();
+    return gitRepositoryFinder.findBySlug(slug)
+        .orElseThrow(NotFoundException::new);
   }
 }

spring-boot/argumentresolver/src/main/java/io/reflectoring/argumentresolver/GitRepositoryIdWithValueOf.java

@@ -0,0 +1,17 @@
+package io.reflectoring.argumentresolver;
+
+import lombok.Value;
+
+@Value
+class GitRepositoryIdWithValueOf {
+
+  private final long value;
+
+  /**
+   * If we have a static valueOf(String) method, we don't need a Converter!
+   */
+  public static GitRepositoryIdWithValueOf valueOf(String value){
+    return new GitRepositoryIdWithValueOf(Long.parseLong(value));
+  }
+
+}

spring-boot/argumentresolver/src/test/java/io/reflectoring/argumentresolver/GitRepositoryIdWithValueOfTest.java

@@ -0,0 +1,27 @@
+package io.reflectoring.argumentresolver;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.web.servlet.MockMvc;
+
+@WebMvcTest(controllers = GitRepositoryIdWithValueOfTestController.class)
+class GitRepositoryIdWithValueOfTest {
+
+  @Autowired
+  private MockMvc mockMvc;
+
+  @MockBean
+  private GitRepositoryFinder gitRepositoryFinder;
+
+  @Test
+  void resolvesRepositoryId() throws Exception {
+    mockMvc.perform(get("/repositories/42"))
+        .andExpect(status().isOk());
+  }
+
+}

spring-boot/argumentresolver/src/test/java/io/reflectoring/argumentresolver/GitRepositoryIdWithValueOfTestController.java

@@ -0,0 +1,18 @@
+package io.reflectoring.argumentresolver;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+class GitRepositoryIdWithValueOfTestController {
+
+  @GetMapping("/repositories/{repositoryId}")
+  String getRepository(@PathVariable("repositoryId") GitRepositoryIdWithValueOf gitRepositoryId) {
+    assertThat(gitRepositoryId).isNotNull();
+    return "test";
+  }
+
+}

spring-boot/boundaries/src/main/java/io/reflectoring/boundaries/billing/internal/batchjob/internal/BillingBatchJobConfiguration.java

@@ -7,6 +7,6 @@ import org.springframework.scheduling.annotation.EnableScheduling;
 @Configuration
 @EnableScheduling
 @ComponentScan
-class BatchJobConfiguration {
+class BillingBatchJobConfiguration {
 
 }

spring-boot/boundaries/src/test/java/io/reflectoring/boundaries/InternalPackageTests.java

@@ -28,7 +28,6 @@ class InternalPackageTests {
     List<String> internalPackages = internalPackages(BASE_PACKAGE);
 
     for (String internalPackage : internalPackages) {
-      assertPackageExists(internalPackage);
       assertPackageIsNotAccessedFromOutside(internalPackage);
     }
 

spring-boot/configuration/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '2.1.3.RELEASE'
+	id 'org.springframework.boot' version '2.3.0.RELEASE'
 	id 'java'
 }
 
@@ -7,7 +7,7 @@ apply plugin: 'io.spring.dependency-management'
 
 group = 'io.reflectoring'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '11'
+sourceCompatibility = '13'
 
 repositories {
 	mavenCentral()
@@ -23,6 +23,7 @@ dependencies {
 	testImplementation('org.junit.jupiter:junit-jupiter:5.4.0')
 	testImplementation('org.springframework.boot:spring-boot-starter-test'){
 		exclude group: 'junit', module: 'junit'
+		exclude group: 'org.junit.vintage'
 	}
 }
 

spring-boot/configuration/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

spring-boot/configuration/src/main/java/io/reflectoring/Application.java

@@ -0,0 +1,14 @@
+package io.reflectoring;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+}

spring-boot/configuration/src/main/java/io/reflectoring/validation/AppConfiguration.java

@@ -0,0 +1,26 @@
+package io.reflectoring.validation;
+
+import io.reflectoring.validation.thirdparty.ThirdPartyComponentProperties;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.validation.annotation.Validated;
+
+@Configuration
+@EnableConfigurationProperties(AppProperties.class)
+class AppConfiguration {
+
+    @Bean
+    public static ReportEmailAddressValidator configurationPropertiesValidator() {
+        return new ReportEmailAddressValidator();
+    }
+
+    @Bean
+    @Validated
+    @ConfigurationProperties(prefix = "app.third-party.properties")
+    public ThirdPartyComponentProperties thirdPartyComponentProperties() {
+        return new ThirdPartyComponentProperties();
+    }
+
+}

spring-boot/configuration/src/main/java/io/reflectoring/validation/AppProperties.java

@@ -0,0 +1,53 @@
+package io.reflectoring.validation;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.validation.Errors;
+import org.springframework.validation.Validator;
+import org.springframework.validation.annotation.Validated;
+
+import javax.validation.Valid;
+import javax.validation.constraints.NotBlank;
+
+@Validated
+@ConfigurationProperties(prefix = "app.properties")
+class AppProperties implements Validator {
+
+    @NotBlank
+    private String name;
+
+    @Valid
+    private ReportProperties report;
+
+    private static final String APP_BASE_NAME = "Application";
+
+    public boolean supports(Class clazz) {
+        return AppProperties.class.isAssignableFrom(clazz);
+    }
+
+    public void validate(Object target, Errors errors) {
+
+        AppProperties appProperties = (AppProperties) target;
+        if (!appProperties.getName().endsWith(APP_BASE_NAME)) {
+            errors.rejectValue("name", "field.name.malformed",
+                    new Object[]{APP_BASE_NAME},
+                    "The application name must contain [" + APP_BASE_NAME + "] base name");
+        }
+
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public ReportProperties getReport() {
+        return report;
+    }
+
+    public void setReport(ReportProperties report) {
+        this.report = report;
+    }
+}

spring-boot/configuration/src/main/java/io/reflectoring/validation/ReportEmailAddressValidator.java

@@ -0,0 +1,27 @@
+package io.reflectoring.validation;
+
+import org.springframework.validation.Errors;
+import org.springframework.validation.ValidationUtils;
+import org.springframework.validation.Validator;
+
+class ReportEmailAddressValidator implements Validator {
+
+    private static final String EMAIL_DOMAIN = "@analysisapp.com";
+
+    public boolean supports(Class clazz) {
+        return ReportProperties.class.isAssignableFrom(clazz);
+    }
+
+    public void validate(Object target, Errors errors) {
+
+        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "emailAddress", "field.required");
+
+        ReportProperties reportProperties = (ReportProperties) target;
+        if (!reportProperties.getEmailAddress().endsWith(EMAIL_DOMAIN)) {
+            errors.rejectValue("emailAddress", "field.domain.required",
+                    new Object[]{EMAIL_DOMAIN},
+                    "The email address must contain [" + EMAIL_DOMAIN + "] domain");
+        }
+
+    }
+}

spring-boot/configuration/src/main/java/io/reflectoring/validation/ReportProperties.java

@@ -0,0 +1,51 @@
+package io.reflectoring.validation;
+
+import javax.validation.constraints.Email;
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+
+class ReportProperties {
+
+    private Boolean sendEmails = Boolean.FALSE;
+
+    private ReportType type = ReportType.HTML;
+
+    @Min(value = 7)
+    @Max(value = 30)
+    private Integer intervalInDays;
+
+    @Email
+    private String emailAddress;
+
+    public Boolean getSendEmails() {
+        return sendEmails;
+    }
+
+    public void setSendEmails(Boolean sendEmails) {
+        this.sendEmails = sendEmails;
+    }
+
+    public ReportType getType() {
+        return type;
+    }
+
+    public void setType(ReportType type) {
+        this.type = type;
+    }
+
+    public Integer getIntervalInDays() {
+        return intervalInDays;
+    }
+
+    public void setIntervalInDays(Integer intervalInDays) {
+        this.intervalInDays = intervalInDays;
+    }
+
+    public String getEmailAddress() {
+        return emailAddress;
+    }
+
+    public void setEmailAddress(String emailAddress) {
+        this.emailAddress = emailAddress;
+    }
+}

spring-boot/configuration/src/main/java/io/reflectoring/validation/ReportType.java

@@ -0,0 +1,5 @@
+package io.reflectoring.validation;
+
+enum ReportType {
+    HTML, PLAIN_TEXT
+}

spring-boot/configuration/src/main/java/io/reflectoring/validation/thirdparty/ThirdPartyComponentProperties.java

@@ -0,0 +1,21 @@
+package io.reflectoring.validation.thirdparty;
+
+import javax.validation.constraints.NotBlank;
+
+/**
+ * We assume that this bean comes from another jar file
+ */
+public class ThirdPartyComponentProperties {
+
+    @NotBlank
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+}

spring-boot/configuration/src/main/resources/application-validation.properties

@@ -0,0 +1,7 @@
+app.properties.name=Analysis Application
+app.properties.report.send-emails=true
+app.properties.report.type=PLAIN_TEXT
+app.properties.report.interval-in-days=14
+app.properties.report.email-address=manager@analysisapp.com
+# third-party component properties
+app.third-party.properties.name=Third Party!

spring-boot/configuration/src/main/resources/application.properties

@@ -1,5 +1,4 @@
 myapp.mail.enabled=true
-myapp
 myapp.mail.pauseBetweenMails=5s
 myapp.mail.maxAttachmentSize=1MB
 myapp.mail.smtpServers[0]=server1

spring-boot/configuration/src/test/java/io/reflectoring/configuration/mail/MailModuleTestWithAllProperties.java

@@ -1,37 +1,36 @@
 package io.reflectoring.configuration.mail;
 
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.util.unit.DataSize;
+
 import java.time.Duration;
 
-import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.extension.ExtendWith;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.junit.jupiter.SpringExtension;
-import org.springframework.util.unit.DataSize;
-import static org.assertj.core.api.Assertions.*;
+import static org.assertj.core.api.Assertions.assertThat;
 
 @SpringBootTest(properties = {
-		"myapp.mail.enabled=asd",
-		"myapp.mail.defaultSubject=hello",
-		"myapp.mail.pauseBetweenMails=5s",
-		"myapp.mail.maxAttachmentSize=1MB",
-		"myapp.mail.smtpServers[0]=server1",
-		"myapp.mail.smtpServers[1]=server2",
-		"myapp.mail.maxAttachmentWeight=5kg"
+        "myapp.mail.enabled=asd",
+        "myapp.mail.defaultSubject=hello",
+        "myapp.mail.pauseBetweenMails=5s",
+        "myapp.mail.maxAttachmentSize=1MB",
+        "myapp.mail.smtpServers[0]=server1",
+        "myapp.mail.smtpServers[1]=server2",
+        "myapp.mail.maxAttachmentWeight=5kg"
 })
 class MailModuleTestWithAllProperties {
 
-	@Autowired(required = false)
-	private MailModuleProperties mailModuleProperties;
+    @Autowired(required = false)
+    private MailModuleProperties mailModuleProperties;
 
-	@Test
-	void propertiesAreLoaded() {
-		assertThat(mailModuleProperties).isNotNull();
-		assertThat(mailModuleProperties.getDefaultSubject()).isEqualTo("hello");
-		assertThat(mailModuleProperties.getEnabled()).isTrue();
-		assertThat(mailModuleProperties.getPauseBetweenMails()).isEqualByComparingTo(Duration.ofSeconds(5));
-		assertThat(mailModuleProperties.getMaxAttachmentSize()).isEqualByComparingTo(DataSize.ofMegabytes(1));
-		assertThat(mailModuleProperties.getSmtpServers()).hasSize(2);
-		assertThat(mailModuleProperties.getMaxAttachmentWeight().getGrams()).isEqualTo(5000L);
-	}
+    @Test
+    void propertiesAreLoaded() {
+        assertThat(mailModuleProperties).isNotNull();
+        assertThat(mailModuleProperties.getDefaultSubject()).isEqualTo("hello");
+        assertThat(mailModuleProperties.getEnabled()).isTrue();
+        assertThat(mailModuleProperties.getPauseBetweenMails()).isEqualByComparingTo(Duration.ofSeconds(5));
+        assertThat(mailModuleProperties.getMaxAttachmentSize()).isEqualByComparingTo(DataSize.ofMegabytes(1));
+        assertThat(mailModuleProperties.getSmtpServers()).hasSize(2);
+        assertThat(mailModuleProperties.getMaxAttachmentWeight().getGrams()).isEqualTo(5000L);
+    }
 }

spring-boot/configuration/src/test/java/io/reflectoring/validation/PropertiesInvalidInputTest.java

@@ -0,0 +1,127 @@
+package io.reflectoring.validation;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.properties.ConfigurationPropertiesBindException;
+import org.springframework.boot.context.properties.bind.validation.BindValidationException;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MutablePropertySources;
+import org.springframework.core.env.PropertiesPropertySource;
+import org.springframework.core.env.StandardEnvironment;
+
+import java.util.Properties;
+
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+/**
+ * We create Spring Application dynamically to catch and test application context startup exceptions
+ */
+class PropertiesInvalidInputTest {
+
+    SpringApplication application;
+    Properties properties;
+
+    @BeforeEach
+    void setup() {
+        // create Spring Application dynamically
+        application = new SpringApplication(ValidationApplication.class);
+
+        // setting test properties for our Spring Application
+        properties = new Properties();
+
+        ConfigurableEnvironment environment = new StandardEnvironment();
+        MutablePropertySources propertySources = environment.getPropertySources();
+        propertySources.addFirst(new PropertiesPropertySource("application-test", properties));
+        application.setEnvironment(environment);
+    }
+
+    @Test
+    void whenGivenNameEmpty_thenNotBlankValidationFails() {
+
+        properties.put("app.properties.name", "");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("Field error in object 'app.properties' on field 'name'")
+                .hasStackTraceContaining("[must not be blank]");
+
+    }
+
+    @Test
+    void whenGivenNameDoesNotContainBaseName_thenCustomAppPropertiesValidatorFails() {
+
+        properties.put("app.properties.name", "My App");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("Field error in object 'app.properties' on field 'name'")
+                .hasStackTraceContaining("[The application name must contain [Application] base name]");
+
+    }
+
+    @Test
+    void whenGivenReportIntervalInDaysMoreThan30_thenMaxValidationFails() {
+
+        properties.put("app.properties.report.interval-in-days", "31");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("rejected value [31]");
+
+    }
+
+    @Test
+    void whenGivenReportIntervalInDaysLessThan7_thenMinValidationFails() {
+
+        properties.put("app.properties.report.interval-in-days", "6");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("rejected value [6]");
+
+    }
+
+    @Test
+    void whenGivenReportEmailAddressIsNotWellFormed_thenEmailValidationFails() {
+
+        properties.put("app.properties.report.email-address", "manager.analysisapp.com");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("rejected value [manager.analysisapp.com]");
+
+    }
+
+    @Test
+    void whenGivenReportEmailAddressDoesNotContainAnalysisappDomain_thenCustomEmailValidatorFails() {
+
+        properties.put("app.properties.report.email-address", "manager@notanalysisapp.com");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("Field error in object 'app.properties.report' on field 'emailAddress'")
+                .hasStackTraceContaining("[The email address must contain [@analysisapp.com] domain]");
+
+    }
+
+    @Test
+    void whenGivenThirdPartyComponentNameIsEmpty_thenNotBlankValidationFails() {
+
+        properties.put("app.third-party.properties.name", "");
+
+        assertThatThrownBy(application::run)
+                .isInstanceOf(ConfigurationPropertiesBindException.class)
+                .hasRootCauseInstanceOf(BindValidationException.class)
+                .hasStackTraceContaining("Field error in object 'app.third-party.properties' on field 'name'")
+                .hasStackTraceContaining("[must not be blank]");
+
+    }
+
+}

spring-boot/configuration/src/test/java/io/reflectoring/validation/PropertiesValidInputTest.java

@@ -0,0 +1,43 @@
+package io.reflectoring.validation;
+
+import io.reflectoring.validation.thirdparty.ThirdPartyComponentProperties;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(properties = {
+        "app.properties.name=My Test Application",
+        "app.properties.report.send-emails=true",
+        "app.properties.report.type=PLAIN_TEXT",
+        "app.properties.report.interval-in-days=14",
+        "app.properties.report.email-address=manager@analysisapp.com",
+        "app.third-party.properties.name=Third Party!"
+}, classes = {AppConfiguration.class})
+class PropertiesValidInputTest {
+
+    @Autowired
+    AppProperties appProperties;
+
+    @Autowired
+    ThirdPartyComponentProperties thirdPartyComponentProperties;
+
+    @Test
+    void appPropertiesAreLoaded() {
+        assertThat(appProperties).isNotNull();
+        assertThat(appProperties.getName()).isEqualTo("My Test Application");
+        assertThat(appProperties.getReport()).isNotNull();
+        assertThat(appProperties.getReport().getSendEmails()).isTrue();
+        assertThat(appProperties.getReport().getType()).isEqualTo(ReportType.PLAIN_TEXT);
+        assertThat(appProperties.getReport().getIntervalInDays()).isEqualTo(14);
+        assertThat(appProperties.getReport().getEmailAddress()).isEqualTo("manager@analysisapp.com");
+    }
+
+    @Test
+    void thirdPartyComponentPropertiesAreLoaded() {
+        assertThat(thirdPartyComponentProperties).isNotNull();
+        assertThat(thirdPartyComponentProperties.getName()).isEqualTo("Third Party!");
+    }
+
+}

spring-boot/configuration/src/test/java/io/reflectoring/validation/ValidationApplication.java

@@ -0,0 +1,15 @@
+package io.reflectoring.validation;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.PropertySource;
+
+@SpringBootApplication
+@PropertySource("classpath:application-validation.properties")
+public class ValidationApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ValidationApplication.class, args);
+    }
+
+}

spring-boot/data-migration/liquibase/.gitignore

@@ -0,0 +1,31 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+
+### VS Code ###
+.vscode/

spring-boot/data-migration/liquibase/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

spring-boot/data-migration/liquibase/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

spring-boot/data-migration/liquibase/README.md

@@ -0,0 +1,122 @@
+# liquibase-demo
+
+This project demonstrates on how to set-up liquibase in a Spring Boot application.
+
+When this project is run, it executes the changelogs and creates a `user_details` table and populates it with some test data.
+It also creates an index and couple of constraints on `user_details` table.
+
+The project also demonstrates the following.
+
+* Organising liquibase change logs [using master changelog](src/main/resources/db/changelog/db.changelog-master.yaml)
+* It demonstrates how to write a [change log in YAML format](src/main/resources/db/changelog/db.changelog-yaml-example.yaml)
+* It demonstrates how to write a [change log in JSON format](src/main/resources/db/changelog/db.changelog-json-example.json)
+* It demonstrates how to write a [change log in XML format](src/main/resources/db/changelog/db.changelog-xml-example.xml)
+* It demonstrates how to write a [change log in SQL format](src/main/resources/db/changelog/db.changelog-sql-example.sql)
+* Enable `INFO` [logs for liquibase](src/main/resources/application.yaml#L10-L12). 
+* It demonstrates testing of changes done by liquibase to the [schema using Junit test](src/test/java/io/reflectoring/liquibase/adapter/datastore/UserRepositoryDockerProfileTest.java)
+* It demonstrates use of liquibase [change log parameters](src/main/resources/db/changelog/db.changelog-yaml-example.yaml#L21-L33)
+* IT demonstrates use of liquibase [context](src/main/resources/db/changelog/db.changelog-xml-example.xml#L5)
+
+## How to Run the project and tests
+
+### Have Docker and Docker Compose in your machine?
+
+#### Run application
+- Clone this repository 
+
+```
+ git clone https://github.com/thombergs/code-examples/spring-boot/data-migration/liquibase
+```
+- Move to the directory `code-examples/spring-boot/data-migration/liquibase`
+
+- Run the docker compose file `infra-local.yaml` in `src/docker`. This starts the postgres database needed to run the application.
+```
+   docker-compose -f ./src/main/docker/infra-local.yaml up -d
+```
+- Now run the spring boot application as follows.
+```
+    mvnw spring-boot:run -Dspring-boot.run.profiles=docker
+```
+
+The application should start and listening on port `8080`.
+
+Open the url (http://localhost:8080/liquibase/users/100000000) in the browser. You should see a response as below
+
+```json
+{
+"id": 100000000,
+"userName": "testUser",
+"firstName": "testFirstName",
+"lastName": "testLastName"
+}
+```
+
+You can login to the database and check the creation of `user_details` table along with some test data in it. 
+```yaml
+    #Use below credentials to login to the database
+    databaseHost: localhost
+    jdbcUrl: jdbc:postgresql://localhost:5432/liquibasedemo?current_schema=public
+    port: 5432
+    username: demouser
+    password: demopassword
+```
+
+Also, have a look at databasechangelog and databasechangeloglock tables.
+
+#### Run Test
+To run integration test, you don't need to run the docker compose file. Just run the test as follows:
+
+```yaml
+mvn test -Dspring.profiles.active=docker
+ 
+```
+The test uses [TestContainers](https://www.testcontainers.org/) to spin a postgres database, which is used during the integration test.
+
+### Don't have docker?
+
+You can use h2 profile to run the app and use h2 database.
+
+- Clone this repository 
+
+```
+ git clone https://github.com/thombergs/code-examples/spring-boot/data-migration/liquibase
+```
+- Move to the directory `code-examples/spring-boot/data-migration/liquibase`
+
+- Now run the spring boot application as follows.
+```
+    mvnw spring-boot:run -Dspring-boot.run.profiles=h2
+```
+
+The application should start and listening on port `8080`.
+
+Open the url (http://localhost:8080/liquibase/users/100000000) in the browser. You should see a response as below
+
+```json
+{
+"id": 100000000,
+"userName": "testUser",
+"firstName": "testFirstName",
+"lastName": "testLastName"
+}
+```
+
+Login to h2 database console using [url](http://localhost:8080/liquibase/h2-console)
+
+```yaml
+    JDBC URL: jdbc:h2:mem:liquibasedemo
+    username: demouser
+    password: demopassword
+```
+Check the creation of `user_details` table along with some test data in it.
+
+Also, have a look at databasechangelog and databasechangeloglock tables.
+
+#### Run Test
+To run integration test
+
+```yaml
+mvn test -Dspring.profiles.active=h2
+ 
+```
+

spring-boot/data-migration/liquibase/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

spring-boot/data-migration/liquibase/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

spring-boot/data-migration/liquibase/pom.xml

@@ -0,0 +1,130 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.2.6.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>io.reflectoring</groupId>
+	<artifactId>liquibase</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>liquibase</name>
+	<description>Code example for Spring Boot liquibase</description>
+
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-starter-logging</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-starter-logging</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-log4j2</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.fasterxml.jackson.dataformat</groupId>
+			<artifactId>jackson-dataformat-yaml</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.liquibase</groupId>
+			<artifactId>liquibase-core</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+			<scope>runtime</scope>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.postgresql</groupId>
+			<artifactId>postgresql</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-configuration-processor</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>org.junit.vintage</groupId>
+					<artifactId>junit-vintage-engine</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.assertj</groupId>
+			<artifactId>assertj-core</artifactId>
+			<version>3.15.0</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>postgresql</artifactId>
+			<version>1.13.0</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>testcontainers</artifactId>
+			<version>1.13.0</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.testcontainers</groupId>
+			<artifactId>junit-jupiter</artifactId>
+			<version>1.13.0</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-boot/data-migration/liquibase/src/main/docker/infra-local.yaml

@@ -0,0 +1,12 @@
+version: "3.0"
+services:
+  database:
+    image: library/postgres:latest
+    ports:
+      - 5432:5432
+    expose:
+      - 5432
+    environment:
+      - POSTGRES_PASSWORD=demopassword
+      - POSTGRES_USER=demouser
+      - POSTGRES_DB=liquibasedemo

spring-boot/data-migration/liquibase/src/main/java/io/reflectoring/liquibase/LiquibaseApplication.java

@@ -0,0 +1,13 @@
+package io.reflectoring.liquibase;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class LiquibaseApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(LiquibaseApplication.class, args);
+	}
+
+}

spring-boot/data-migration/liquibase/src/main/java/io/reflectoring/liquibase/adapter/api/UserController.java

@@ -0,0 +1,33 @@
+package io.reflectoring.liquibase.adapter.api;
+
+import io.reflectoring.liquibase.adapter.datastore.UserRepository;
+import io.reflectoring.liquibase.domain.User;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/users")
+public class UserController {
+
+  private final UserRepository userRepository;
+
+  public UserController(UserRepository userRepository) {
+    this.userRepository = userRepository;
+  }
+
+  @PostMapping
+  public User addUser(@RequestBody User user) {
+    return userRepository.save(user);
+  }
+
+  @GetMapping("/{id}")
+  public ResponseEntity<User> getUser(@PathVariable("id") Long userId) {
+    return ResponseEntity.of(userRepository.findById(userId));
+  }
+
+}

spring-boot/data-migration/liquibase/src/main/java/io/reflectoring/liquibase/adapter/datastore/UserRepository.java

@@ -0,0 +1,7 @@
+package io.reflectoring.liquibase.adapter.datastore;
+
+import io.reflectoring.liquibase.domain.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserRepository extends JpaRepository<User, Long> {
+}

spring-boot/data-migration/liquibase/src/main/java/io/reflectoring/liquibase/domain/User.java

@@ -0,0 +1,59 @@
+package io.reflectoring.liquibase.domain;
+
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.Table;
+
+@Entity
+@Table(name = "user_details")
+public class User {
+
+  @Id
+  @Column(name ="id")
+  @GeneratedValue(strategy = GenerationType.IDENTITY)
+  private Long id;
+
+  @Column(name = "username")
+  private String userName;
+
+  @Column(name = "first_name")
+  private String firstName;
+
+  @Column(name = "last_name")
+  private String lastName;
+
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public String getUserName() {
+    return userName;
+  }
+
+  public void setUserName(String userName) {
+    this.userName = userName;
+  }
+
+  public String getFirstName() {
+    return firstName;
+  }
+
+  public void setFirstName(String firstName) {
+    this.firstName = firstName;
+  }
+
+  public String getLastName() {
+    return lastName;
+  }
+
+  public void setLastName(String lastName) {
+    this.lastName = lastName;
+  }
+}

spring-boot/data-migration/liquibase/src/main/resources/application.yaml

@@ -0,0 +1,43 @@
+spring:
+  profiles:
+    active: h2
+  application:
+    name: liquibase
+server:
+  servlet:
+    context-path: /liquibase
+
+logging:
+  level:
+    "liquibase" : info
+---
+spring:
+  profiles: docker
+  jpa:
+    database-platform: org.hibernate.dialect.PostgreSQLDialect
+  datasource:
+    url: jdbc:postgresql://localhost:5432/liquibasedemo?current_schema=public
+    driverClassName: org.postgresql.Driver
+    username: demouser
+    password: demopassword
+  liquibase:
+    parameters:
+      textColumnType: TEXT
+    contexts: nonprod
+---
+spring:
+  profiles: h2
+  jpa:
+    database-platform: org.hibernate.dialect.H2Dialect
+  datasource:
+    url: jdbc:h2:mem:liquibasedemo
+    driverClassName: org.h2.Driver
+    username: demouser
+    password: demopassword
+  liquibase:
+    parameters:
+      textColumnType: VARCHAR(250)
+    contexts: nonprod
+  h2:
+    console:
+      enabled: true

spring-boot/data-migration/liquibase/src/main/resources/db/changelog/db.changelog-json-example.json

@@ -0,0 +1,16 @@
+{ "databaseChangeLog": [
+  {
+    "changeSet": {
+      "id": "add-last-name-constraint",
+      "author": "liquibase-demo-service",
+      "changes": [
+        {
+          "addNotNullConstraint": {
+            "columnName": "last_name",
+            "constraintName": "user_last_name_key",
+            "tableName": "user_details"
+          }
+        }]
+    }
+  }
+]}

spring-boot/data-migration/liquibase/src/main/resources/db/changelog/db.changelog-master.yaml

@@ -0,0 +1,9 @@
+databaseChangeLog:
+  - include:
+      file: db/changelog/db.changelog-yaml-example.yaml
+  - include:
+      file: db/changelog/db.changelog-sql-example.sql
+  - include:
+      file: db/changelog/db.changelog-json-example.json
+  - include:
+      file: db/changelog/db.changelog-xml-example.xml

spring-boot/data-migration/liquibase/src/main/resources/db/changelog/db.changelog-sql-example.sql

@@ -0,0 +1,4 @@
+--liquibase formatted sql
+
+--changeset liquibase-demo-service:add-user-name-constraint
+ALTER TABLE user_details ADD CONSTRAINT user_details_username_key UNIQUE (username);

spring-boot/data-migration/liquibase/src/main/resources/db/changelog/db.changelog-xml-example.xml

@@ -0,0 +1,16 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.8.xsd">
+  <changeSet author="liquibase-docs" id="loadUpdateData-example" context="!prod">
+    <loadUpdateData
+      encoding="UTF-8"
+      file="db/data/users.csv"
+      onlyUpdate="false"
+      primaryKey="id"
+      quotchar="'"
+      separator=","
+      tableName="user_details">
+    </loadUpdateData>
+  </changeSet>
+</databaseChangeLog>

spring-boot/data-migration/liquibase/src/main/resources/db/changelog/db.changelog-yaml-example.yaml

@@ -0,0 +1,34 @@
+databaseChangeLog:
+  - changeSet:
+      id: create-table-user
+      author: liquibase-demo-service
+      preConditions:
+        - onFail: MARK_RAN
+          not:
+            tableExists:
+              tableName: user_details
+      changes:
+        - createTable:
+            columns:
+              - column:
+                  autoIncrement: true
+                  constraints:
+                    nullable: false
+                    primaryKey: true
+                    primaryKeyName: user_pkey
+                  name: id
+                  type: BIGINT
+              - column:
+                  constraints:
+                    nullable: false
+                  name: username
+                  type: ${textColumnType}
+              - column:
+                  constraints:
+                    nullable: false
+                  name: first_name
+                  type: ${textColumnType}
+              - column:
+                  name: last_name
+                  type: ${textColumnType}
+            tableName: user_details

spring-boot/data-migration/liquibase/src/main/resources/db/data/users.csv

@@ -0,0 +1,3 @@
+id,username,first_name,last_name
+100000000,testUser,testFirstName,testLastName
+100000001,testUser1,testFirstName1,testLastName1

spring-boot/data-migration/liquibase/src/main/resources/log4j2.yaml

@@ -0,0 +1,19 @@
+Configuration:
+  status: error
+
+  appenders:
+    Console:
+      name: Console
+      PatternLayout:
+        Pattern: "[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n"
+  Loggers:
+    logger:
+      - name: io.reflectoring
+        level: debug
+        additivity: false
+        AppenderRef:
+          - ref: Console
+    Root:
+      level: error
+      AppenderRef:
+        ref: Console

spring-boot/data-migration/liquibase/src/test/java/io/reflectoring/liquibase/adapter/datastore/UserRepositoryIntegrationTest.java

@@ -0,0 +1,67 @@
+package io.reflectoring.liquibase.adapter.datastore;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import io.reflectoring.liquibase.domain.User;
+import java.util.Optional;
+import javax.validation.constraints.NotNull;
+import org.junit.ClassRule;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.env.Profiles;
+import org.springframework.test.context.ContextConfiguration;
+import org.testcontainers.containers.PostgreSQLContainer;
+
+@DataJpaTest
+@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
+@ContextConfiguration(initializers = UserRepositoryIntegrationTest.Initializer.class)
+class UserRepositoryIntegrationTest {
+
+  @ClassRule
+  public static PostgreSQLContainer postgreSQLContainer = new PostgreSQLContainer()
+    .withDatabaseName("liquibasedemo").withPassword("demopassword").withUsername("demouser");
+
+  @Autowired
+  private UserRepository userRepository;
+
+
+  @Test
+  public void findById_userId100000000_returnsUserDetails() {
+    Optional<User> user = userRepository.findById(100000000L);
+    assertThat(user.isPresent()).isTrue();
+    assertThat(user.get()).hasFieldOrPropertyWithValue("id", 100000000L)
+      .hasFieldOrPropertyWithValue("userName", "testUser");
+  }
+
+  @Test
+  public void findById_userId100000001_returnsUserDetails() {
+    Optional<User> user = userRepository.findById(100000001L);
+    assertThat(user.isPresent()).isTrue();
+    assertThat(user.get()).hasFieldOrPropertyWithValue("id", 100000001L)
+      .hasFieldOrPropertyWithValue("userName", "testUser1");
+  }
+
+  /**
+   * This used to override the database properties in spring environment
+   */
+  public static class Initializer implements
+    ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+    @Override
+    public void initialize(@NotNull ConfigurableApplicationContext configurableApplicationContext) {
+      if (configurableApplicationContext.getEnvironment().acceptsProfiles(Profiles.of("docker"))) {
+        postgreSQLContainer.start();
+        configurableApplicationContext.getEnvironment().getSystemProperties()
+          .put("spring.datasource.url", postgreSQLContainer.getJdbcUrl());
+        configurableApplicationContext.getEnvironment().getSystemProperties()
+          .put("spring.datasource.username", postgreSQLContainer.getUsername());
+        configurableApplicationContext.getEnvironment().getSystemProperties()
+          .put("spring.datasource.password", postgreSQLContainer.getPassword());
+      }
+    }
+  }
+}

spring-boot/dependency-injection/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

spring-boot/dependency-injection/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

spring-boot/dependency-injection/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

spring-boot/dependency-injection/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

spring-boot/dependency-injection/pom.xml

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.4.RELEASE</version>
+		<relativePath /> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.example</groupId>
+	<artifactId>Example</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>Example</name>
+	<description>Demo project for dependency injection</description>
+
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+			<exclusions>
+				<exclusion>
+					<groupId>org.junit.vintage</groupId>
+					<artifactId>junit-vintage-engine</artifactId>
+				</exclusion>
+			</exclusions>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-boot/dependency-injection/src/main/java/com/example/ExampleApplication.java

@@ -0,0 +1,15 @@
+package com.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+
+
+@SpringBootApplication(scanBasePackages = { "com.example.dependency" })
+public class ExampleApplication {
+
+	public static void main(String[] args) {
+		ApplicationContext context = SpringApplication.run(ExampleApplication.class, args);
+	}
+
+}

spring-boot/dependency-injection/src/main/java/com/example/constructorinjection/Cake.java

@@ -0,0 +1,29 @@
+package com.example.constructorinjection;
+
+import java.util.Objects;
+
+import org.springframework.stereotype.Component;
+
+import com.example.dependency.Flavor;
+
+@Component
+public class Cake {
+
+	private Flavor flavor;
+
+	Cake(Flavor flavor) {
+		Objects.requireNonNull(flavor);
+		this.flavor = flavor;
+	}
+
+	public Flavor getFlavor() {
+		return flavor;
+	}
+
+	@Override
+	public String toString() {
+		return "Cake [flavor=" + flavor + "]";
+	}
+
+
+}

spring-boot/dependency-injection/src/main/java/com/example/constructorinjection/Sandwich.java

@@ -0,0 +1,32 @@
+package com.example.constructorinjection;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.example.dependency.Bread;
+import com.example.dependency.Topping;
+
+@Component
+public class Sandwich {
+
+	private Topping toppings;
+	private Bread breadType;
+
+	Sandwich(Topping toppings) {
+		this.toppings = toppings;
+	}
+
+	@Autowired
+	Sandwich(Topping toppings, Bread breadType) {
+		this.toppings = toppings;
+		this.breadType = breadType;
+	}
+
+	public Topping getToppings() {
+		return toppings;
+	}
+
+	public Bread getBreadType() {
+		return breadType;
+	}
+}

spring-boot/dependency-injection/src/main/java/com/example/dependency/Bread.java

@@ -0,0 +1,17 @@
+package com.example.dependency;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class Bread {
+
+	String breadType;
+
+	public String getBreadType() {
+		return breadType;
+	}
+
+	void setBreadType(String breadType) {
+		this.breadType = breadType;
+	}
+}

spring-boot/dependency-injection/src/main/java/com/example/dependency/Flavor.java

@@ -0,0 +1,24 @@
+package com.example.dependency;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class Flavor {
+
+	String flavorType;
+	String color;
+
+	public String getFlavorType() {
+		return flavorType;
+	}
+
+	public String getColor() {
+		return color;
+	}
+
+	@Override
+	public String toString() {
+		return "Flavor [flavorType=" + flavorType + ", color=" + color + "]";
+	}
+
+}

spring-boot/dependency-injection/src/main/java/com/example/dependency/Pizza.java

@@ -0,0 +1,24 @@
+package com.example.dependency;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class Pizza {
+
+	@Autowired
+	private Topping toppings;
+
+	Pizza(Topping toppings) {
+		this.toppings = toppings;
+	}
+
+	public Topping getToppings() {
+		return toppings;
+	}
+
+	public void setToppings(Topping toppings) {
+		this.toppings = toppings;
+	}
+
+}

spring-boot/dependency-injection/src/main/java/com/example/dependency/Topping.java

@@ -0,0 +1,23 @@
+package com.example.dependency;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class Topping {
+
+	String toppingName;
+
+	public String getToppingName() {
+		return toppingName;
+	}
+
+	void setToppingName(String toppingName) {
+		this.toppingName = toppingName;
+	}
+
+	@Override
+	public String toString() {
+		return "Topping [toppingName=" + toppingName + "]";
+	}
+
+}

spring-boot/dependency-injection/src/main/java/com/example/fieldinjection/IceCream.java

@@ -0,0 +1,28 @@
+package com.example.fieldinjection;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.example.dependency.Topping;
+
+@Component
+public class IceCream {
+
+	@Autowired
+	private Topping toppings;
+
+	public Topping getToppings() {
+		return toppings;
+	}
+
+	void setToppings(Topping toppings) {
+		System.out.println("Using setter injection - " + this.toppings);
+		this.toppings = toppings;
+	}
+
+	@Override
+	public String toString() {
+		return "IceCream [toppings=" + toppings + "]";
+	}
+
+}

spring-boot/dependency-injection/src/main/java/com/example/setterinjection/Cake.java

@@ -0,0 +1,50 @@
+package com.example.setterinjection;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.example.dependency.Flavor;
+import com.example.dependency.Topping;
+
+@Component
+public class Cake {
+
+	private Logger LOGGER = LoggerFactory.getLogger(Cake.class);
+	
+	private Flavor flavor;
+	
+	@Autowired
+	private Topping toppings;
+	
+	public Cake() {
+		LOGGER.info("Flavor from setter Injection : " + this.flavor);
+	}
+	
+	@Autowired
+	public void setFlavor(Flavor flavor) {
+		LOGGER.info("Initialising flavor object using setter injection");
+		this.flavor = flavor;
+	}
+
+	public Flavor getFlavor() {
+		return flavor;
+	}
+
+	public Topping getToppings() {
+		return toppings;
+	}
+
+	public void setToppings(Topping toppings) {
+		this.toppings = toppings;
+	}
+
+	@Override
+	public String toString() {
+		return "Cake [LOGGER=" + LOGGER + ", flavor=" + flavor + ", toppings=" + toppings + "]";
+	}
+
+
+
+}

spring-boot/dependency-injection/src/main/java/com/example/setterinjection/Cookie.java

@@ -0,0 +1,27 @@
+package com.example.setterinjection;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import com.example.dependency.Topping;
+
+@Component
+public class Cookie {
+
+	private Topping toppings;
+
+	@Autowired
+	void setTopping(Topping toppings) {
+		this.toppings = toppings;
+	}
+
+	public Topping getTopping() {
+		return toppings;
+	}
+
+	@Override
+	public String toString() {
+		return "Cookie [toppings=" + toppings + "]";
+	}
+
+}

spring-boot/dependency-injection/src/test/java/com/example/ExampleApplicationCI.java

@@ -0,0 +1,19 @@
+package com.example;
+
+import com.example.constructorinjection.Cake;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+
+
+@SpringBootApplication(scanBasePackages = { "com.example.constructorinjection", "com.example.dependency" })
+public class ExampleApplicationCI {
+
+	public static void main(String[] args) {
+
+		ApplicationContext context = SpringApplication.run(ExampleApplicationCI.class, args);
+		Cake obj = context.getBean(Cake.class);
+		System.out.println("Cake : " + obj.toString());
+	}
+
+}

spring-boot/dependency-injection/src/test/java/com/example/ExampleApplicationFI.java

@@ -0,0 +1,19 @@
+package com.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+
+import com.example.fieldinjection.IceCream;
+
+@SpringBootApplication(scanBasePackages = { "com.example.dependency", "com.example.fieldinjection" })
+public class ExampleApplicationFI {
+
+	public static void main(String[] args) {
+
+		ApplicationContext context = SpringApplication.run(ExampleApplicationFI.class, args);
+		IceCream obj = context.getBean(IceCream.class);
+		System.out.println("IceCream : " + obj.toString());
+	}
+
+}

spring-boot/dependency-injection/src/test/java/com/example/ExampleApplicationSI.java

@@ -0,0 +1,19 @@
+package com.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+
+import com.example.setterinjection.Cookie;
+
+@SpringBootApplication(scanBasePackages = { "com.example.setterinjection", "com.example.dependency", })
+public class ExampleApplicationSI {
+
+	public static void main(String[] args) {
+
+		ApplicationContext context = SpringApplication.run(ExampleApplicationSI.class, args);
+		Cookie obj = context.getBean(Cookie.class);
+		System.out.println("Cookie : " + obj.toString());
+	}
+
+}