PublishSubscribeChannel

PublishSubscribeChannel允许广播消息给所有订阅者。

例子

PublishSubscribeChannelDemo.java

package com.supremepole.publishsubsribechannel;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.integration.Message;
import org.springframework.integration.MessageChannel;
import org.springframework.integration.channel.PublishSubscribeChannel;
import org.springframework.integration.support.MessageBuilder;

public class PublishSubscribeChannelDemo {

    private ApplicationContext applicationContext=null;

    private MessageChannel messageChannel=null;

    public PublishSubscribeChannelDemo() {
        applicationContext=new ClassPathXmlApplicationContext("publish-subscribe-channel.xml");
        messageChannel=applicationContext.getBean("publish-subscribe-channel", MessageChannel.class);
    }

    public void subscribe(){
        ((PublishSubscribeChannel)messageChannel).subscribe(new MyMessageHandler());
    }

    public void publish(){
        Message<String> message= MessageBuilder.withPayload("Hello World").build();
        messageChannel.send(message, 10000);
    }

    public static void main(String[] args) {
        PublishSubscribeChannelDemo publishSubscribeChannelDemo =new PublishSubscribeChannelDemo();
        publishSubscribeChannelDemo.subscribe();
        publishSubscribeChannelDemo.publish();
    }

}

MyMessageHandler.java

package com.supremepole.publishsubsribechannel;

import org.springframework.integration.Message;
import org.springframework.integration.MessagingException;
import org.springframework.integration.core.MessageHandler;

public class MyMessageHandler implements MessageHandler {

    public void handleMessage(Message<?> message) throws MessagingException {
        System.out.println("Handling Message:" + message);
    }

}

publish-subscribe-channel.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:int="http://www.springframework.org/schema/integration"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/integration
		http://www.springframework.org/schema/integration/spring-integration-2.1.xsd">

    <int:publish-subscribe-channel id="publish-subscribe-channel"/>

</beans>

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.supremepole</groupId>
    <artifactId>publish-subscribe-channel</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-core</artifactId>
            <version>2.1.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.integration</groupId>
            <artifactId>spring-integration-stream</artifactId>
            <version>2.1.3.RELEASE</version>
        </dependency>
    </dependencies>

</project>