上次有简单写过关于潜入模式的使用，以下是一个使用server 模式基于docker-compose 运行的demo
hazelcast-jet 参考架构
环境准备
- docker-compose
包含了一个management （注意多实例管理需要license）同时添加了prometheus 支持
version: "3"
services:
app:
image: dalongrong/alpine-oraclejdk8:8.131.11-full-arthas-tz
volumes:
- "./app:/app"
- "./mybooks:/var/opt/mybooks"
command: java -jar /app/hazelcast-jet-app.jar
jet:
image: hazelcast/hazelcast-jet
environment:
- "LOGGING_LEVEL=DEBUG"
- "PROMETHEUS_PORT=8080"
volumes:
- "./mybooks:/var/opt/mybooks"
ports:
- "5701:5701"
- "8080:8080"
manage:
image: hazelcast/hazelcast-jet-management-center
environment:
- "JET_MEMBER_ADDRESS=jet:5701"
ports:
- "8081:8081"
- 应用代码
package com.dalong;
import com.hazelcast.jet.Jet;
import com.hazelcast.jet.JetInstance;
import com.hazelcast.jet.Traversers;
import com.hazelcast.jet.aggregate.AggregateOperations;
import com.hazelcast.jet.config.JetClientConfig;
import com.hazelcast.jet.config.JetConfig;
import com.hazelcast.jet.config.JobConfig;
import com.hazelcast.jet.pipeline.Pipeline;
import com.hazelcast.jet.pipeline.Sinks;
import com.hazelcast.jet.pipeline.Sources;
import com.hazelcast.jet.pipeline.WindowDefinition;
public class Application {
public static void main(String[] args) {
String path = "/var/opt/mybooks";
// batch mode
BatchMode(path);
// stream mode
// StreamMode(path);
}
//
private static void StreamMode(String path) {
JetClientConfig config = new JetClientConfig();
config.getNetworkConfig().addAddress("127.0.0.1:5701");
JetInstance jet = Jet.newJetClient(config);
// JetInstance jet = Jet.bootstrappedInstance();
MyPipe mypipe = new MyPipe();
JobConfig jobConfig =new JobConfig();
jobConfig.addClass(MyPipe.class);
jet.newJob(mypipe.buildPipeline(path),jobConfig).join();
}
private static void BatchMode(String path) {
JetClientConfig config = new JetClientConfig();
config.getNetworkConfig().addAddress("jet:5701");
JetInstance jet = Jet.newJetClient(config);
// JetInstance jet = Jet.bootstrappedInstance();
MyPipe2 mypipe2 = new MyPipe2();
JobConfig jobConfig =new JobConfig();
jobConfig.addClass(MyPipe2.class);
jet.newJob(mypipe2.buildPipeline(path),jobConfig).join();
}
}
- pipeline 定义
MyPipe.java
package com.dalong;
import com.hazelcast.jet.Traversers;
import com.hazelcast.jet.aggregate.AggregateOperations;
import com.hazelcast.jet.pipeline.Pipeline;
import com.hazelcast.jet.pipeline.Sinks;
import com.hazelcast.jet.pipeline.Sources;
import com.hazelcast.jet.pipeline.WindowDefinition;
import java.io.Serializable;
/**
@author dalong
*/
public class MyPipe implements Serializable {
Pipeline buildPipeline(String path) {
Pipeline p = Pipeline.create();
p.readFrom(Sources.fileWatcher(path))
.withIngestionTimestamps()
.setLocalParallelism(1)
.flatMap(line -> Traversers.traverseArray(line.toLowerCase().split("\\W+")))
.filter(word -> !word.isEmpty())
.groupingKey(word -> word)
.window(WindowDefinition.tumbling(4))
.aggregate(AggregateOperations.counting())
.writeTo(Sinks.logger());
return p;
}
}
MyPipe2.java
package com.dalong;
import com.hazelcast.jet.Traversers;
import com.hazelcast.jet.aggregate.AggregateOperations;
import com.hazelcast.jet.pipeline.Pipeline;
import com.hazelcast.jet.pipeline.Sinks;
import com.hazelcast.jet.pipeline.Sources;
import com.hazelcast.jet.pipeline.WindowDefinition;
import java.io.Serializable;
/**
@author dalong
*/
public class MyPipe2 implements Serializable {
Pipeline buildPipeline(String path) {
Pipeline p = Pipeline.create();
p.readFrom(Sources.files(path))
.flatMap(line -> Traversers.traverseArray(line.toLowerCase().split("\W+")))
.filter(word -> !word.isEmpty())
.groupingKey(word -> word)
.aggregate(AggregateOperations.counting())
.writeTo(Sinks.logger());
return p;
}
}
- pom.xml
<?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>
<groupId>com.dalong</groupId>
<artifactId>myid</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<encoding>UTF-8</encoding>
<java.version>1.8</java.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>com.hazelcast.jet</groupId>
<artifactId>hazelcast-jet</artifactId>
<version>4.2</version>
</dependency>
</dependencies>
<build>
<!-- Maven Shade Plugin -->
<finalName>hazelcast-jet-app</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<executions>
<!-- Run shade goal on package phase -->
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<!-- add Main-Class to manifest file -->
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.dalong.Application</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
几点说明
- server 模式序列化问题
如果注意代码，我使用了 jobconfig
JobConfig jobConfig =new JobConfig();
jobConfig.addClass(MyPipe.class);
jet.newJob(mypipe.buildPipeline(path),jobConfig).join();
不然会有问题
Exception in thread "main" com.hazelcast.nio.serialization.HazelcastSerializationException: Error deserializing vertex 'fused(flat-map, filter)': com.hazelcast.nio.serialization.HazelcastSerializationException: java.lang.ClassNotFoundException: com.dalong.Application. Add it using JobConfig or start all members with it on classpath
运行&&效果
- 启动核心服务
docker-compose up -d jet manage
- 启动应用
docker-compose up -d app
效果 
UI 
参考资料
https://github.com/rongfengliang/hazelcast-jet-docker-compose-learning
https://github.com/hazelcast/hazelcast-jet
https://jet-start.sh/