Refactoring samples
Restructuring the samples repository Add more docker support Add acceptance tests for the apps Adding sensor average processor sample Remove aggregate samples
This commit is contained in:
Soby Chacko
BIN
kafka-streams-samples/kafka-streams-interactive-query-basic/.mvn/wrapper/maven-wrapper.jar
vendored
Normal file
BIN
kafka-streams-samples/kafka-streams-interactive-query-basic/.mvn/wrapper/maven-wrapper.jar
vendored
Normal file
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@@ -0,0 +1 @@
|
||||
distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.0/apache-maven-3.5.0-bin.zip
|
||||
@@ -0,0 +1,35 @@
|
||||
== What is this app?
|
||||
|
||||
This is an example of a Spring Cloud Stream processor using Kafka Streams support.
|
||||
|
||||
The example is based on a contrived use case of tracking products by interactively querying their status.
|
||||
The program accepts product ID's and track their counts hitherto by interactively querying the underlying store. \
|
||||
This sample uses lambda expressions and thus requires Java 8+.
|
||||
|
||||
=== Running the app:
|
||||
|
||||
Go to the root of the repository and do:
|
||||
|
||||
`docker-compose up -d`
|
||||
|
||||
`./mvnw clean package`
|
||||
|
||||
`java -jar target/kafka-streams-interactive-query-basic-0.0.1-SNAPSHOT.jar --app.product.tracker.productIds=123,124,125`
|
||||
|
||||
The above command will track products with ID's 123,124 and 125 and print their counts seen so far every 30 seconds.
|
||||
|
||||
Issue the following commands:
|
||||
|
||||
`docker exec -it kafka-iq-basic /opt/kafka/bin/kafka-console-producer.sh --broker-list 127.0.0.1:9092 --topic products`
|
||||
|
||||
Enter the following in the console producer (one line at a time) and watch the output on the console (or IDE) where the application is running.
|
||||
|
||||
```
|
||||
{"id":"123"}
|
||||
{"id":"124"}
|
||||
{"id":"125"}
|
||||
{"id":"123"}
|
||||
{"id":"123"}
|
||||
{"id":"123"}
|
||||
```
|
||||
|
||||
@@ -0,0 +1,19 @@
|
||||
version: '3'
|
||||
services:
|
||||
kafka:
|
||||
image: wurstmeister/kafka
|
||||
container_name: kafka-iq-basic
|
||||
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
|
||||
225
kafka-streams-samples/kafka-streams-interactive-query-basic/mvnw
vendored
Executable file
225
kafka-streams-samples/kafka-streams-interactive-query-basic/mvnw
vendored
Executable file
@@ -0,0 +1,225 @@
|
||||
#!/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
|
||||
#
|
||||
# http://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 "$MAVEN_PROJECTBASEDIR"`
|
||||
fi
|
||||
|
||||
WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
|
||||
|
||||
exec "$JAVACMD" \
|
||||
$MAVEN_OPTS \
|
||||
-classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
|
||||
"-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
|
||||
${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
|
||||
@@ -0,0 +1,41 @@
|
||||
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
|
||||
<modelVersion>4.0.0</modelVersion>
|
||||
|
||||
<artifactId>kafka-streams-interactive-query-basic</artifactId>
|
||||
<version>0.0.1-SNAPSHOT</version>
|
||||
<packaging>jar</packaging>
|
||||
|
||||
<name>kafka-streams-interactive-query-basic</name>
|
||||
<description>Spring Cloud Stream sample for KStream interactive queries</description>
|
||||
|
||||
<parent>
|
||||
<groupId>spring.cloud.stream.samples</groupId>
|
||||
<artifactId>spring-cloud-stream-samples-parent</artifactId>
|
||||
<version>0.0.1-SNAPSHOT</version>
|
||||
<relativePath>../..</relativePath>
|
||||
</parent>
|
||||
|
||||
<dependencies>
|
||||
<dependency>
|
||||
<groupId>org.springframework.cloud</groupId>
|
||||
<artifactId>spring-cloud-stream-binder-kafka-streams</artifactId>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-starter-test</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
||||
<build>
|
||||
<plugins>
|
||||
<plugin>
|
||||
<groupId>org.springframework.boot</groupId>
|
||||
<artifactId>spring-boot-maven-plugin</artifactId>
|
||||
</plugin>
|
||||
</plugins>
|
||||
</build>
|
||||
|
||||
</project>
|
||||
@@ -0,0 +1,124 @@
|
||||
/*
|
||||
* Copyright 2017 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
|
||||
*
|
||||
* http://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 kafka.streams.product.tracker;
|
||||
|
||||
import org.apache.kafka.common.serialization.Serdes;
|
||||
import org.apache.kafka.streams.KeyValue;
|
||||
import org.apache.kafka.streams.kstream.KStream;
|
||||
import org.apache.kafka.streams.state.QueryableStoreTypes;
|
||||
import org.apache.kafka.streams.state.ReadOnlyKeyValueStore;
|
||||
import org.springframework.beans.factory.annotation.Autowired;
|
||||
import org.springframework.boot.SpringApplication;
|
||||
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
|
||||
import org.springframework.boot.autoconfigure.SpringBootApplication;
|
||||
import org.springframework.boot.context.properties.ConfigurationProperties;
|
||||
import org.springframework.boot.context.properties.EnableConfigurationProperties;
|
||||
import org.springframework.cloud.stream.annotation.EnableBinding;
|
||||
import org.springframework.cloud.stream.annotation.StreamListener;
|
||||
import org.springframework.cloud.stream.binder.kafka.streams.QueryableStoreRegistry;
|
||||
import org.springframework.cloud.stream.binder.kafka.streams.annotations.KafkaStreamsProcessor;
|
||||
import org.springframework.kafka.support.serializer.JsonSerde;
|
||||
import org.springframework.messaging.handler.annotation.SendTo;
|
||||
import org.springframework.scheduling.annotation.EnableScheduling;
|
||||
import org.springframework.scheduling.annotation.Scheduled;
|
||||
import org.springframework.util.StringUtils;
|
||||
|
||||
import java.util.Set;
|
||||
import java.util.stream.Collectors;
|
||||
|
||||
@SpringBootApplication
|
||||
public class KafkaStreamsInteractiveQueryApplication {
|
||||
|
||||
public static void main(String[] args) {
|
||||
SpringApplication.run(KafkaStreamsInteractiveQueryApplication.class, args);
|
||||
}
|
||||
|
||||
@EnableBinding(KafkaStreamsProcessor.class)
|
||||
@EnableAutoConfiguration
|
||||
@EnableConfigurationProperties(ProductTrackerProperties.class)
|
||||
@EnableScheduling
|
||||
public static class InteractiveProductCountApplication {
|
||||
|
||||
private static final String STORE_NAME = "prod-id-count-store";
|
||||
|
||||
@Autowired
|
||||
private QueryableStoreRegistry queryableStoreRegistry;
|
||||
|
||||
@Autowired
|
||||
ProductTrackerProperties productTrackerProperties;
|
||||
|
||||
ReadOnlyKeyValueStore<Object, Object> keyValueStore;
|
||||
|
||||
@StreamListener("input")
|
||||
@SendTo("output")
|
||||
public KStream<Integer, Long> process(KStream<Object, Product> input) {
|
||||
|
||||
return input
|
||||
.filter((key, product) -> productIds().contains(product.getId()))
|
||||
.map((key, value) -> new KeyValue<>(value.id, value))
|
||||
.groupByKey(new Serdes.IntegerSerde(), new JsonSerde<>(Product.class))
|
||||
.count(STORE_NAME)
|
||||
.toStream();
|
||||
}
|
||||
|
||||
private Set<Integer> productIds() {
|
||||
return StringUtils.commaDelimitedListToSet(productTrackerProperties.getProductIds())
|
||||
.stream().map(Integer::parseInt).collect(Collectors.toSet());
|
||||
}
|
||||
|
||||
|
||||
@Scheduled(fixedRate = 30000, initialDelay = 5000)
|
||||
public void printProductCounts() {
|
||||
if (keyValueStore == null) {
|
||||
keyValueStore = queryableStoreRegistry.getQueryableStoreType(STORE_NAME, QueryableStoreTypes.keyValueStore());
|
||||
}
|
||||
|
||||
for (Integer id : productIds()) {
|
||||
System.out.println("Product ID: " + id + " Count: " + keyValueStore.get(id));
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ConfigurationProperties(prefix = "app.product.tracker")
|
||||
static class ProductTrackerProperties {
|
||||
|
||||
private String productIds;
|
||||
|
||||
public String getProductIds() {
|
||||
return productIds;
|
||||
}
|
||||
|
||||
public void setProductIds(String productIds) {
|
||||
this.productIds = productIds;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static class Product {
|
||||
|
||||
Integer id;
|
||||
|
||||
public Integer getId() {
|
||||
return id;
|
||||
}
|
||||
|
||||
public void setId(Integer id) {
|
||||
this.id = id;
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,21 @@
|
||||
spring.cloud.stream.bindings.output.contentType: application/json
|
||||
spring.cloud.stream.kafka.streams.binder.configuration.commit.interval.ms: 1000
|
||||
spring.cloud.stream.kafka.streams:
|
||||
binder.configuration:
|
||||
key.serde: org.apache.kafka.common.serialization.Serdes$StringSerde
|
||||
value.serde: org.apache.kafka.common.serialization.Serdes$StringSerde
|
||||
bindings.output.producer:
|
||||
keySerde: org.apache.kafka.common.serialization.Serdes$IntegerSerde
|
||||
valueSerde: org.apache.kafka.common.serialization.Serdes$LongSerde
|
||||
spring.cloud.stream.bindings.output:
|
||||
destination: product-counts
|
||||
producer:
|
||||
headerMode: raw
|
||||
useNativeEncoding: true
|
||||
spring.cloud.stream.bindings.input:
|
||||
destination: products
|
||||
consumer:
|
||||
headerMode: raw
|
||||
spring.cloud.stream.kafka.streams.binder:
|
||||
brokers: localhost #192.168.99.100
|
||||
zkNodes: localhost #192.168.99.100
|
||||
@@ -0,0 +1,12 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<configuration>
|
||||
<appender name="stdout" class="ch.qos.logback.core.ConsoleAppender">
|
||||
<encoder>
|
||||
<pattern>%d{ISO8601} %5p %t %c{2}:%L - %m%n</pattern>
|
||||
</encoder>
|
||||
</appender>
|
||||
<root level="INFO">
|
||||
<appender-ref ref="stdout"/>
|
||||
</root>
|
||||
<logger name="org.apache.kafka.streams.processor.internals" level="WARN"/>
|
||||
</configuration>
|
||||
Reference in New Issue
Block a user