rabbitmq学习10:使用spring-amqp发送消息及异步接收消息

   前面我们已经学习了发送消息及同步接收消息的例子了。下面我们来看看如何通过Spring配置来实现异步接收消息。

   现在我们建立两个WEB项目。发送消息的项目命名为”rabbitmq-demo-producer“ ，异步接受的消息项目名称”rabbitmq-demo-consumer“。

  下面来看看rabbitmq-demo-producer项目中发送信息的程序及配置。

 MessageProducer类是用于发送消息的类。实现如下

package com.abin.rabbitmq;

import org.springframework.amqp.rabbit.core.RabbitTemplate;

public class MessageProducer {
private RabbitTemplate rabbitTemplate;

public void sendMessage(Integer i) {
String message = "Hello World wubin " + "#" + i;
//Exchange的名称为"hello.topic"，routingkey的名称为"hello.world.q123ueue"
rabbitTemplate.convertAndSend("hello.topic", "hello.world.q123ueue",
message);
System.out.println("发送第" + i + "个消息成功！内容为：" + message);

//		String messages = "Hello World direct " + "#" + i;
//		rabbitTemplate.convertAndSend("hello.direct", "hello.world.queue",
//				messages);
//		System.out.println("发送第" + i + "个消息成功！内容为：" + messages);
}

public void setRabbitTemplate(RabbitTemplate rabbitTemplate) {
this.rabbitTemplate = rabbitTemplate;
}

}

spring的配置文件如下：applicationContext-rabbitmq.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="connectionFactory"
class="org.springframework.amqp.rabbit.connection.SingleConnectionFactory">
<constructor-arg value="localhost" />
<property name="username" value="guest" />
<property name="password" value="guest" />
</bean>
<bean id="amqpAdmin"
class="org.springframework.amqp.rabbit.core.RabbitAdmin">
<constructor-arg ref="connectionFactory" />
</bean>
<bean id="rabbitTemplate"
class="org.springframework.amqp.rabbit.core.RabbitTemplate">
<constructor-arg ref="connectionFactory"></constructor-arg>
</bean>
<bean id="messageProducer"
class="com.abin.rabbitmq.MessageProducer">
<property name="rabbitTemplate">
<ref bean="rabbitTemplate" />
</property>
</bean>
</beans>

对于发送消息的程序自己可以实现，我是通过Struts2来实现的，例如

package com.abin.action;

import java.util.Date;

import com.abin.rabbitmq.MessageProducer;
import com.opensymphony.xwork2.ActionSupport;

public class SendAction extends ActionSupport {
private MessageProducer messageProducer;

public String execute() throws Exception {
Date a = new Date();
long b = System.currentTimeMillis();
for (int i = 0; i <= 10000; i++) {
messageProducer.sendMessage(i);
}
System.out.println(a);
System.out.println(new Date());
System.out.println("共花了" + (System.currentTimeMillis() - b) + "ms");
return null;
}

public void setMessageProducer(MessageProducer messageProducer) {
this.messageProducer = messageProducer;
}

}

发送消息项目的程序差不多就这些了

下面来看看接受消息的程序如下

HelloWorldHandler类用于接收消息的处理类，如下

package com.abin.rabbitmq;

import java.util.Date;

public class HelloWorldHandler {
public void handleMessage(String text) {
System.out.println("Received: " + text);

System.out.println(new Date());
}
}

spring的配置文件如下：applicationContext-rabbitmq.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- 创建connectionFactory -->
<bean id="connectionFactory"
class="org.springframework.amqp.rabbit.connection.SingleConnectionFactory">
<constructor-arg value="localhost" />
<property name="username" value="guest" />
<property name="password" value="guest" />
</bean>
<!-- 创建rabbitAdmin 代理类 -->
<bean id="rabbitAdmin"
class="org.springframework.amqp.rabbit.core.RabbitAdmin">
<constructor-arg ref="connectionFactory" />
</bean>
<!-- 创建rabbitTemplate 消息模板类 -->
<bean id="rabbitTemplate"
class="org.springframework.amqp.rabbit.core.RabbitTemplate">
<constructor-arg ref="connectionFactory"></constructor-arg>
</bean>
<!-- 声明Queue并设定Queue的名称 -->
<bean id="helloWorldQueue"
class="org.springframework.amqp.core.Queue">
<constructor-arg value="hello.world.queue"></constructor-arg>
</bean>
<!-- 声明消息转换器为SimpleMessageConverter -->
<bean id="messageConverter"
class="org.springframework.amqp.support.converter.SimpleMessageConverter">
</bean>
<!-- 声明Exchange的类型为topic并设定Exchange的名称 -->
<bean id="hellotopic"
class="org.springframework.amqp.core.TopicExchange">
<constructor-arg value="hello.topic"></constructor-arg>
</bean>

<!-- 声明Exchange的类型为direct并设定Exchange的名称 -->
<bean id="hellodirect"
class="org.springframework.amqp.core.DirectExchange">
<constructor-arg value="hello.direct"></constructor-arg>
</bean>
<!-- 通过Binding来判定Queue、Exchange、routingKey -->
<!-- 其中构建Binding的参数1是Queue，参数2是Exchange，参数3是routingKey -->
<bean id="queuebling"
class="org.springframework.amqp.core.Binding">
<constructor-arg index="0" ref="helloWorldQueue"></constructor-arg>
<constructor-arg index="1" ref="hellotopic"></constructor-arg>
<constructor-arg index="2" value="hello.world.#"></constructor-arg>
</bean>
<!-- 监听生产者发送的消息开始 -->
<!-- 用于接收消息的处理类 -->
<bean id="helloWorldHandler"
class="com.abin.rabbitmq.HelloWorldHandler">
</bean>
<!-- 用于消息的监听的代理类MessageListenerAdapter -->
<bean id="helloListenerAdapter"
class="org.springframework.amqp.rabbit.listener.adapter.MessageListenerAdapter">
<constructor-arg ref="helloWorldHandler" />
<property name="defaultListenerMethod" value="handleMessage"></property>
<property name="messageConverter" ref="messageConverter"></property>
</bean>
<!-- 用于消息的监听的容器类SimpleMessageListenerContainer，对于queueName的值一定要与定义的Queue的值相同 -->
<bean id="listenerContainer"
class="org.springframework.amqp.rabbit.listener.SimpleMessageListenerContainer">
<property name="queueName" value="hello.world.queue"></property>
<property name="connectionFactory" ref="connectionFactory"></property>
<property name="messageListener" ref="helloListenerAdapter"></property>
</bean>
<!-- 监听生产者发送的消息结束 -->
</beans>