使用spring-amqp发送消息及同步接收消息

通过对spring-amqp看重要类的认识，下面来通过spring-amqp的发送消息及同步接收消息是如何实现的。有兴趣的朋友 可以去spring-amqp官网下载例子。

先来看看HelloWorldConfiguration类

package org.springframework.amqp.helloworld;

import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.config.AbstractRabbitConfiguration;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.connection.SingleConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class HelloWorldConfiguration extends AbstractRabbitConfiguration {

protected final String helloWorldQueueName = "hello.world.queue";

@Bean
public ConnectionFactory connectionFactory() {
SingleConnectionFactory connectionFactory = new SingleConnectionFactory(
"localhost");
connectionFactory.setUsername("guest");
connectionFactory.setPassword("guest");
return connectionFactory;
}

@Override
public RabbitTemplate rabbitTemplate() {
RabbitTemplate template = new RabbitTemplate(connectionFactory());
// The routing key is set to the name of the queue by the broker for the
// default exchange.
template.setRoutingKey(this.helloWorldQueueName);
// // Where we will synchronously receive messages from
template.setQueue(this.helloWorldQueueName);
return template;
}

@Bean
public Queue helloWorldQueue() {
return new Queue(this.helloWorldQueueName);
}
}

此类定义了ConnectionFactory 、RabbitTemplate 、Queue

发送消息的程序如下：

package org.springframework.amqp.helloworld;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Producer {

public static void main(String[] args) {
ApplicationContext context = new AnnotationConfigApplicationContext(HelloWorldConfiguration.class);
AmqpTemplate amqpTemplate = context.getBean(AmqpTemplate.class);
amqpTemplate.convertAndSend("Hello World");
System.out.println("Sent: Hello World");
}

}

同步接收消息如下：

package org.springframework.amqp.helloworld;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Consumer {

public static void main(String[] args) {
ApplicationContext context = new AnnotationConfigApplicationContext(HelloWorldConfiguration.class);
AmqpTemplate amqpTemplate = context.getBean(AmqpTemplate.class);
System.out.println("Received: " + amqpTemplate.receiveAndConvert());
}

}

这个例子是Exchange类型为DirectExchange. routingkey的名称默认为Queue的名称。

对于 HelloWorldConfiguration类的配置，也可以通过SPRING XML文件来配置。例如

rabbitConfiguration.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>
<bean id="rabbitAdmin"
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>
<property name="queue" value="hello.world.queue"></property>
<property name="routingKey" value="hello.world.queue"></property>
</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>

</beans>

转载自:http://wubin850219.iteye.com/blog/1050279

官方资料:http://www.springsource.org/spring-amqp
参考资料:http://roadytulip.iteye.com/blog/661279