rabbitmq学习9: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

Java代码  收藏代码

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：

Java代码  收藏代码

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：

Java代码  收藏代码

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

Java代码  收藏代码

<?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>