Spring整合RabbitMQ-配制文件方式-2-推模式消费者

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推模式的消费者

在推模式中使用可以两种实现：

使用ChannelAwareMessageListener.

除消息外，还提供了Channel这个对象，通过channel可以有更大的灵活性。

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.listener.api.ChannelAwareMessageListener;

public class MesListener implements ChannelAwareMessageListener {

    @Override
    public void onMessage(Message message, Channel channel) throws Exception {
        
    }
}

使用MessageListener

基本的消息的临时。普通的场景基本够用。

import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageListener;

public class MesListener implements MessageListener {
    @Override
    public void onMessage(Message message) {

    }
}

此处以ChannelAwareMessageListener为样例：

import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.listener.api.ChannelAwareMessageListener;

public class MesListener implements ChannelAwareMessageListener {

    @Override
    public void onMessage(Message message, Channel channel) throws Exception {
        String encoding = message.getMessageProperties().getContentEncoding();
        System.out.println("收到的消息是：" + new String(message.getBody(), encoding));
    }
}

spring-rabbit.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:rabbit="http://www.springframework.org/schema/rabbit"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/rabbit
    http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">

    <!--配制连接工厂-->
    <rabbit:connection-factory id="connectFactory"
                               host="node1" virtual-host="/"
                               username="root" password="123456"
                               port="5672"
    ></rabbit:connection-factory>


    <!--用于自动向RabbitMQ声明队列、交换器、绑定 等操作工具类-->
    <rabbit:admin id="rabbitAdmin" connection-factory="connectFactory"></rabbit:admin>


    <!--用于简化操作的模板类-->
    <rabbit:template connection-factory="connectFactory" id="rabbitTemplate"/>


    <!--声明队列队列-->
    <rabbit:queue id="msg1" name="queue.msg" durable="false" exclusive="false" auto-delete="false"></rabbit:queue>


    <!--配制鉴别器对象-->
    <bean id="msgListener" class="com.nullnull.learn.MesListener"/>

    <!--配制监听器-->
    <rabbit:listener-container connection-factory="connectFactory">
        <rabbit:listener ref="msgListener" queues="msg1"></rabbit:listener>
    </rabbit:listener-container>


</beans>

容器启动类

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class ListenerApplication {
    public static void main(String[] args) {
        //启动Spring容器
        new ClassPathXmlApplicationContext("spring-rabbit.xml");
    }
}