QueueChannel

QueueChannel允许消息接受者轮询获得消息，用一个队列接收消息，队列的容量大小可配置。

QueueChannel例子

QueueChannelDemo.java

package com.supremepole.queuechannel;

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.QueueChannel;
import org.springframework.integration.support.MessageBuilder;

public class QueueChannelDemo {

    private ApplicationContext applicationContext=null;

    private MessageChannel messageChannel=null;

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

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

    public void receiveMessage(){
        Message<?> message=((QueueChannel) messageChannel).receive(10000);
        System.out.println("Payload: "+message.getPayload());
    }

    public static void main(String[] args) {
        QueueChannelDemo queueChannelDemo =new QueueChannelDemo();
        queueChannelDemo.sendMessage();
        queueChannelDemo.receiveMessage();
    }

}

queue-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:channel id="queue-channel">
        <int:queue capacity="10" />
    </int: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>queue-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>