From db65408dcc10467be7311b3b15bd66196b527726 Mon Sep 17 00:00:00 2001 From: Soby Chacko Date: Tue, 12 Nov 2019 17:07:03 -0500 Subject: [PATCH] Adding functions composition samples for both Kafka/Rabbit --- .../function-composition-kafka/.mvn | 1 + .../function-composition-kafka/README.adoc | 36 +++ .../docker-compose.yml | 19 ++ .../function-composition-kafka/mvnw | 226 ++++++++++++++++++ .../function-composition-kafka/mvnw.cmd | 145 +++++++++++ .../function-composition-kafka/pom.xml | 123 ++++++++++ .../FunctionCompositionDemoApplication.java | 49 ++++ .../src/main/resources/application.yml | 8 + .../java/demo/ModuleApplicationTests.java | 39 +++ .../function-composition-rabbit/.mvn | 1 + .../function-composition-rabbit/README.adoc | 35 +++ .../docker-compose.yml | 7 + .../function-composition-rabbit/mvnw | 226 ++++++++++++++++++ .../function-composition-rabbit/mvnw.cmd | 145 +++++++++++ .../function-composition-rabbit/pom.xml | 118 +++++++++ .../FunctionCompositionDemoApplication.java | 49 ++++ .../src/main/resources/application.yml | 8 + .../java/demo/ModuleApplicationTests.java | 39 +++ multi-functions-samples/pom.xml | 2 + 19 files changed, 1276 insertions(+) create mode 120000 multi-functions-samples/function-composition-kafka/.mvn create mode 100644 multi-functions-samples/function-composition-kafka/README.adoc create mode 100644 multi-functions-samples/function-composition-kafka/docker-compose.yml create mode 100755 multi-functions-samples/function-composition-kafka/mvnw create mode 100644 multi-functions-samples/function-composition-kafka/mvnw.cmd create mode 100644 multi-functions-samples/function-composition-kafka/pom.xml create mode 100644 multi-functions-samples/function-composition-kafka/src/main/java/demo/FunctionCompositionDemoApplication.java create mode 100644 multi-functions-samples/function-composition-kafka/src/main/resources/application.yml create mode 100644 multi-functions-samples/function-composition-kafka/src/test/java/demo/ModuleApplicationTests.java create mode 120000 multi-functions-samples/function-composition-rabbit/.mvn create mode 100644 multi-functions-samples/function-composition-rabbit/README.adoc create mode 100644 multi-functions-samples/function-composition-rabbit/docker-compose.yml create mode 100755 multi-functions-samples/function-composition-rabbit/mvnw create mode 100644 multi-functions-samples/function-composition-rabbit/mvnw.cmd create mode 100644 multi-functions-samples/function-composition-rabbit/pom.xml create mode 100644 multi-functions-samples/function-composition-rabbit/src/main/java/demo/FunctionCompositionDemoApplication.java create mode 100644 multi-functions-samples/function-composition-rabbit/src/main/resources/application.yml create mode 100644 multi-functions-samples/function-composition-rabbit/src/test/java/demo/ModuleApplicationTests.java diff --git a/multi-functions-samples/function-composition-kafka/.mvn b/multi-functions-samples/function-composition-kafka/.mvn new file mode 120000 index 0000000..d21aa17 --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/.mvn @@ -0,0 +1 @@ +../../.mvn \ No newline at end of file diff --git a/multi-functions-samples/function-composition-kafka/README.adoc b/multi-functions-samples/function-composition-kafka/README.adoc new file mode 100644 index 0000000..f1fc8be --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/README.adoc @@ -0,0 +1,36 @@ +==== Spring Cloud Stream Function Composition Sample + +In this *Spring Cloud Stream* sample, we will demo function composition with Kafka. + +## Requirements + +To run this sample, you will need to have installed: + +* Java 8 or Above + +## Running the application + +The following instructions assume that you are running Kafka as a Docker image. + +* Go to the application root +* `docker-compose up -d` + +* `./mvnw clean package` + +* `java -jar target/function-composition-kafka-0.0.1-SNAPSHOT.jar` + +Take a look at the configuration in the application.yml file. The function definition is `uppercase|echo` and the incoming destination is defined as `uppercase-in` (through `uppercase|echo-in-0.destination`) + +Now, send some text data to the input topic, + +`ocker exec -it kafka /opt/kafka/bin/kafka-console-producer.sh --broker-list 127.0.0.1:9092 --topic uppercase-in` + +and then watch the application console. + +You should see output messages from both `uppercase` and `echo` functions. + +* `docker-compose down` + + + + diff --git a/multi-functions-samples/function-composition-kafka/docker-compose.yml b/multi-functions-samples/function-composition-kafka/docker-compose.yml new file mode 100644 index 0000000..8b8692a --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/docker-compose.yml @@ -0,0 +1,19 @@ +version: '3' +services: + kafka: + image: wurstmeister/kafka + container_name: kafka + ports: + - "9092:9092" + environment: + - KAFKA_ADVERTISED_HOST_NAME=127.0.0.1 + - KAFKA_ADVERTISED_PORT=9092 + - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181 + depends_on: + - zookeeper + zookeeper: + image: wurstmeister/zookeeper + ports: + - "2181:2181" + environment: + - KAFKA_ADVERTISED_HOST_NAME=zookeeper \ No newline at end of file diff --git a/multi-functions-samples/function-composition-kafka/mvnw b/multi-functions-samples/function-composition-kafka/mvnw new file mode 100755 index 0000000..0ce08e9 --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/mvnw @@ -0,0 +1,226 @@ +#!/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. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven2 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 Migwn, 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 "$JAVA_HOME"; pwd)`" + # TODO classpath? +fi + +if [ -z "$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 "$BASE_DIR" ]; then + exit 1; +fi + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +echo $MAVEN_PROJECTBASEDIR +MAVEN_OPTS="$(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 "$MAVEN_PROJECTBASEDIR"` +fi + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +"$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" + diff --git a/multi-functions-samples/function-composition-kafka/mvnw.cmd b/multi-functions-samples/function-composition-kafka/mvnw.cmd new file mode 100644 index 0000000..7ecd01d --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/mvnw.cmd @@ -0,0 +1,145 @@ +@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 Maven2 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 key stroke 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 enable echoing my 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 + +set MAVEN_CMD_LINE_ARGS=%* + +@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="".\.mvn\wrapper\maven-wrapper.jar"" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CMD_LINE_ARGS% +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% diff --git a/multi-functions-samples/function-composition-kafka/pom.xml b/multi-functions-samples/function-composition-kafka/pom.xml new file mode 100644 index 0000000..07d5430 --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/pom.xml @@ -0,0 +1,123 @@ + + + 4.0.0 + + function-composition-kafka + 0.0.1-SNAPSHOT + jar + function-composition-kafka + Spring Cloud Stream Sample Function Composition Kafka + + + org.springframework.boot + spring-boot-starter-parent + 2.2.0.RELEASE + + + + + Hoxton.BUILD-SNAPSHOT + + + + + + org.springframework.cloud + spring-cloud-dependencies + ${spring-cloud.version} + pom + import + + + + + + + org.springframework.cloud + spring-cloud-stream-binder-kafka + + + org.springframework.boot + spring-boot-starter-test + test + + + org.springframework.kafka + spring-kafka-test + test + + + org.springframework.boot + spring-boot-starter-actuator + + + org.springframework.boot + spring-boot-starter + + + org.springframework.boot + spring-boot-starter-web + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + + + spring-snapshots + Spring Snapshots + https://repo.spring.io/libs-snapshot-local + + true + + + false + + + + spring-milestones + Spring Milestones + https://repo.spring.io/libs-milestone-local + + false + + + + + + spring-snapshots + Spring Snapshots + https://repo.spring.io/libs-snapshot-local + + true + + + false + + + + spring-milestones + Spring Milestones + https://repo.spring.io/libs-milestone-local + + false + + + + spring-releases + Spring Releases + https://repo.spring.io/libs-release-local + + false + + + + + diff --git a/multi-functions-samples/function-composition-kafka/src/main/java/demo/FunctionCompositionDemoApplication.java b/multi-functions-samples/function-composition-kafka/src/main/java/demo/FunctionCompositionDemoApplication.java new file mode 100644 index 0000000..e62762a --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/src/main/java/demo/FunctionCompositionDemoApplication.java @@ -0,0 +1,49 @@ +/* + * Copyright 2015-2019 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. + */ + +package demo; + +import java.util.function.Function; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +@SpringBootApplication +public class FunctionCompositionDemoApplication { + + public static void main(String[] args) { + SpringApplication.run(FunctionCompositionDemoApplication.class, args); + } + + @Bean + public Function uppercase() { + return v -> { + v = v.toUpperCase(); + System.out.println("Uppercase: " + v); + return v; + }; + } + + @Bean + public Function echo() { + return v -> { + System.out.println("Echo: " + v); + return v; + }; + } + +} diff --git a/multi-functions-samples/function-composition-kafka/src/main/resources/application.yml b/multi-functions-samples/function-composition-kafka/src/main/resources/application.yml new file mode 100644 index 0000000..9518cd5 --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/src/main/resources/application.yml @@ -0,0 +1,8 @@ +spring: + cloud: + stream: + bindings: + uppercase|echo-in-0: + destination: uppercase-in + function: + definition: uppercase|echo diff --git a/multi-functions-samples/function-composition-kafka/src/test/java/demo/ModuleApplicationTests.java b/multi-functions-samples/function-composition-kafka/src/test/java/demo/ModuleApplicationTests.java new file mode 100644 index 0000000..9ec6f99 --- /dev/null +++ b/multi-functions-samples/function-composition-kafka/src/test/java/demo/ModuleApplicationTests.java @@ -0,0 +1,39 @@ +/* + * Copyright 2015 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. + */ + +package demo; + +import org.junit.Ignore; +import org.junit.Test; +import org.junit.runner.RunWith; + +import org.springframework.boot.test.context.SpringBootTest; +import org.springframework.test.annotation.DirtiesContext; +import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; +import org.springframework.test.context.web.WebAppConfiguration; + +@RunWith(SpringJUnit4ClassRunner.class) +@SpringBootTest(classes = FunctionCompositionDemoApplication.class) +@WebAppConfiguration +@DirtiesContext +public class ModuleApplicationTests { + + @Test + @Ignore + public void contextLoads() { + } + +} diff --git a/multi-functions-samples/function-composition-rabbit/.mvn b/multi-functions-samples/function-composition-rabbit/.mvn new file mode 120000 index 0000000..d21aa17 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/.mvn @@ -0,0 +1 @@ +../../.mvn \ No newline at end of file diff --git a/multi-functions-samples/function-composition-rabbit/README.adoc b/multi-functions-samples/function-composition-rabbit/README.adoc new file mode 100644 index 0000000..b5cc2f4 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/README.adoc @@ -0,0 +1,35 @@ +==== Spring Cloud Stream Function Composition Sample + +In this *Spring Cloud Stream* sample, we will demo function composition with RabbitMQ. + +## Requirements + +To run this sample, you will need to have installed: + +* Java 8 or Above + +## Running the application + +The following instructions assume that you are running RabbitMQ as a Docker image. +If that's not the case, skip the docker steps below. + +* Go to the application root +* `docker-compose up -d` + +* `./mvnw clean package` + +* `java -jar target/function-composition-rabbit-0.0.1-SNAPSHOT.jar` + +Take a look at the configuration in the application.yml file. The function definition is `uppercase|echo` and the incoming destination is defined as `uppercase-in` (through `uppercase|echo-in-0.destination`) + +Now, send some text data to the input exchage (You can use the RabbitMQ admin consloe for doing this). + +Then watch the application console. + +You should see output messages from both `uppercase` and `echo` functions. + +* `docker-compose down` + + + + diff --git a/multi-functions-samples/function-composition-rabbit/docker-compose.yml b/multi-functions-samples/function-composition-rabbit/docker-compose.yml new file mode 100644 index 0000000..7c3da92 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/docker-compose.yml @@ -0,0 +1,7 @@ +version: '3' +services: + rabbitmq: + image: rabbitmq:management + ports: + - 5672:5672 + - 15672:15672 \ No newline at end of file diff --git a/multi-functions-samples/function-composition-rabbit/mvnw b/multi-functions-samples/function-composition-rabbit/mvnw new file mode 100755 index 0000000..0ce08e9 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/mvnw @@ -0,0 +1,226 @@ +#!/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. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven2 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 Migwn, 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 "$JAVA_HOME"; pwd)`" + # TODO classpath? +fi + +if [ -z "$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 "$BASE_DIR" ]; then + exit 1; +fi + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +echo $MAVEN_PROJECTBASEDIR +MAVEN_OPTS="$(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 "$MAVEN_PROJECTBASEDIR"` +fi + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +"$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" + diff --git a/multi-functions-samples/function-composition-rabbit/mvnw.cmd b/multi-functions-samples/function-composition-rabbit/mvnw.cmd new file mode 100644 index 0000000..7ecd01d --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/mvnw.cmd @@ -0,0 +1,145 @@ +@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 Maven2 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 key stroke 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 enable echoing my 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 + +set MAVEN_CMD_LINE_ARGS=%* + +@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="".\.mvn\wrapper\maven-wrapper.jar"" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CMD_LINE_ARGS% +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% diff --git a/multi-functions-samples/function-composition-rabbit/pom.xml b/multi-functions-samples/function-composition-rabbit/pom.xml new file mode 100644 index 0000000..15bc713 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/pom.xml @@ -0,0 +1,118 @@ + + + 4.0.0 + + function-composition-rabbit + 0.0.1-SNAPSHOT + jar + function-composition-rabbit + Spring Cloud Stream Sample Function Composition Rabbit + + + org.springframework.boot + spring-boot-starter-parent + 2.2.0.RELEASE + + + + + Hoxton.BUILD-SNAPSHOT + + + + + + org.springframework.cloud + spring-cloud-dependencies + ${spring-cloud.version} + pom + import + + + + + + + org.springframework.cloud + spring-cloud-stream-binder-rabbit + + + org.springframework.boot + spring-boot-starter-test + test + + + org.springframework.boot + spring-boot-starter-actuator + + + org.springframework.boot + spring-boot-starter + + + org.springframework.boot + spring-boot-starter-web + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + + + spring-snapshots + Spring Snapshots + https://repo.spring.io/libs-snapshot-local + + true + + + false + + + + spring-milestones + Spring Milestones + https://repo.spring.io/libs-milestone-local + + false + + + + + + spring-snapshots + Spring Snapshots + https://repo.spring.io/libs-snapshot-local + + true + + + false + + + + spring-milestones + Spring Milestones + https://repo.spring.io/libs-milestone-local + + false + + + + spring-releases + Spring Releases + https://repo.spring.io/libs-release-local + + false + + + + + diff --git a/multi-functions-samples/function-composition-rabbit/src/main/java/demo/FunctionCompositionDemoApplication.java b/multi-functions-samples/function-composition-rabbit/src/main/java/demo/FunctionCompositionDemoApplication.java new file mode 100644 index 0000000..e62762a --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/src/main/java/demo/FunctionCompositionDemoApplication.java @@ -0,0 +1,49 @@ +/* + * Copyright 2015-2019 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. + */ + +package demo; + +import java.util.function.Function; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +@SpringBootApplication +public class FunctionCompositionDemoApplication { + + public static void main(String[] args) { + SpringApplication.run(FunctionCompositionDemoApplication.class, args); + } + + @Bean + public Function uppercase() { + return v -> { + v = v.toUpperCase(); + System.out.println("Uppercase: " + v); + return v; + }; + } + + @Bean + public Function echo() { + return v -> { + System.out.println("Echo: " + v); + return v; + }; + } + +} diff --git a/multi-functions-samples/function-composition-rabbit/src/main/resources/application.yml b/multi-functions-samples/function-composition-rabbit/src/main/resources/application.yml new file mode 100644 index 0000000..9518cd5 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/src/main/resources/application.yml @@ -0,0 +1,8 @@ +spring: + cloud: + stream: + bindings: + uppercase|echo-in-0: + destination: uppercase-in + function: + definition: uppercase|echo diff --git a/multi-functions-samples/function-composition-rabbit/src/test/java/demo/ModuleApplicationTests.java b/multi-functions-samples/function-composition-rabbit/src/test/java/demo/ModuleApplicationTests.java new file mode 100644 index 0000000..9ec6f99 --- /dev/null +++ b/multi-functions-samples/function-composition-rabbit/src/test/java/demo/ModuleApplicationTests.java @@ -0,0 +1,39 @@ +/* + * Copyright 2015 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. + */ + +package demo; + +import org.junit.Ignore; +import org.junit.Test; +import org.junit.runner.RunWith; + +import org.springframework.boot.test.context.SpringBootTest; +import org.springframework.test.annotation.DirtiesContext; +import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; +import org.springframework.test.context.web.WebAppConfiguration; + +@RunWith(SpringJUnit4ClassRunner.class) +@SpringBootTest(classes = FunctionCompositionDemoApplication.class) +@WebAppConfiguration +@DirtiesContext +public class ModuleApplicationTests { + + @Test + @Ignore + public void contextLoads() { + } + +} diff --git a/multi-functions-samples/pom.xml b/multi-functions-samples/pom.xml index fbbd5b1..d8fb1cc 100644 --- a/multi-functions-samples/pom.xml +++ b/multi-functions-samples/pom.xml @@ -11,6 +11,8 @@ multi-functions-kafka multi-functions-rabbit + function-composition-kafka + function-composition-rabbit