spring整合消息队列rabbitmq(转载) -

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spring整合消息队列rabbitmq(转载)

rabbitmq

spring大家太熟，就不多说了

rabbitmq一个amqp的队列服务实现,具体介绍请参考本文http://lynnkong.iteye.com/blog/1699684

本文侧重介绍如何将rabbitmq整合到项目中

ps:本文只是简单一个整合介绍，属于抛砖引玉，具体实现还需大家深入研究哈..

1.首先是生产者配置

<?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:context="http://www.springframework.org/schema/context"

       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/context

                http://www.springframework.org/schema/context/spring-context.xsd

            http://www.springframework.org/schema/rabbit

                http://www.springframework.org/schema/rabbit/spring-rabbit-1.0.xsd">
 
   <!-- 连接服务配置  -->

   <rabbit:connection-factory id="connectionFactory" host="localhost" username="guest"

        password="guest" port="5672"  />

   <rabbit:admin connection-factory="connectionFactory"/>

   <!-- queue 队列声明-->

   <rabbit:queue id="queue_one" durable="true" auto-delete="false" exclusive="false" name="queue_one"/>

   <!-- exchange queue binging key 绑定 -->

    <rabbit:direct-exchange name="my-mq-exchange" durable="true" auto-delete="false" id="my-mq-exchange<span></span>">

        <rabbit:bindings>

            <rabbit:binding queue="queue_one" key="queue_one_key"/>

        </rabbit:bindings>

    </rabbit:direct-exchange>

    <-- spring amqp默认的是jackson 的一个插件,目的将生产者生产的数据转换为json存入消息队列，由于fastjson的速度快于jackson,这里替换为fastjson的一个实现 -->

    <bean id="jsonMessageConverter"  class="mq.convert.FastJsonMessageConverter"></bean>

    <-- spring template声明-->

    <rabbit:template exchange="my-mq-exchange" id="amqpTemplate"  connection-factory="connectionFactory"  message-converter="jsonMessageConverter"/>

</beans>

2.fastjson messageconver插件实现

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.amqp.core.Message;

import org.springframework.amqp.core.MessageProperties;

import org.springframework.amqp.support.converter.AbstractMessageConverter;

import org.springframework.amqp.support.converter.MessageConversionException;
 // 这里本人换成fastjson的jsonobject实现

import fe.json.FastJson;
 
public class FastJsonMessageConverter  extends AbstractMessageConverter {

    private static Log log = LogFactory.getLog(FastJsonMessageConverter.class);
 
    public static final String DEFAULT_CHARSET = "UTF-8";
 
    private volatile String defaultCharset = DEFAULT_CHARSET;

    public FastJsonMessageConverter() {

        super();

        //init();

    }

    public void setDefaultCharset(String defaultCharset) {

        this.defaultCharset = (defaultCharset != null) ? defaultCharset

                : DEFAULT_CHARSET;

    }

    public Object fromMessage(Message message)

            throws MessageConversionException {

        return null;

    }

    public <T> T fromMessage(Message message,T t) {

        String json = "";

        try {

            json = new String(message.getBody(),defaultCharset);

        } catch (UnsupportedEncodingException e) {

            e.printStackTrace();

        }

        return (T) FastJson.fromJson(json, t.getClass());

    }   

    protected Message createMessage(Object objectToConvert,

            MessageProperties messageProperties)

            throws MessageConversionException {

        byte[] bytes = null;

        try {

            String jsonString = FastJson.toJson(objectToConvert);

            bytes = jsonString.getBytes(this.defaultCharset);

        } catch (UnsupportedEncodingException e) {

            throw new MessageConversionException(

                    "Failed to convert Message content", e);

        } 

        messageProperties.setContentType(MessageProperties.CONTENT_TYPE_JSON);

        messageProperties.setContentEncoding(this.defaultCharset);

        if (bytes != null) {

            messageProperties.setContentLength(bytes.length);

        }

        return new Message(bytes, messageProperties);
 
    }
}

3.生产者端调用

import java.util.List;
 
import org.springframework.amqp.core.AmqpTemplate;
 
public class MyMqGatway {

    @Autowired

    private AmqpTemplate amqpTemplate;

    public void sendDataToCrQueue(Object obj) {

        amqpTemplate.convertAndSend("queue_one_key", obj);

    }   
}

4.消费者端配置(与生产者端大同小异)

<?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:context="http://www.springframework.org/schema/context"

       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/context

                http://www.springframework.org/schema/context/spring-context.xsd

            http://www.springframework.org/schema/rabbit

                http://www.springframework.org/schema/rabbit/spring-rabbit-1.0.xsd">
 
   <!-- 连接服务配置  -->

   <rabbit:connection-factory id="connectionFactory" host="localhost" username="guest"

        password="guest" port="5672"  />

   <rabbit:admin connection-factory="connectionFactory"/>

   <!-- queue 队列声明-->

   <rabbit:queue id="queue_one" durable="true" auto-delete="false" exclusive="false" name="queue_one"/>

   <!-- exchange queue binging key 绑定 -->

    <rabbit:direct-exchange name="my-mq-exchange" durable="true" auto-delete="false" id="my-mq-exchange">

        <rabbit:bindings>

            <rabbit:binding queue="queue_one" key="queue_one_key"/>

        </rabbit:bindings>

    </rabbit:direct-exchange>
 
    <!-- queue litener  观察 监听模式 当有消息到达时会通知监听在对应的队列上的监听对象 taskExecutor这个需要自己实现一个连接池 按照官方说法 除非特别大的数据量 一般不需要连接池-->

    <rabbit:listener-container connection-factory="connectionFactory" acknowledge="auto" task-executor="taskExecutor">

        <rabbit:listener queues="queue_one" ref="queueOneLitener"/>

    </rabbit:listener-container>

</beans>

5.消费者端调用

import org.springframework.amqp.core.Message;

import org.springframework.amqp.core.MessageListener;
 
public class QueueOneLitener implements  MessageListener{

    @Override

    public void onMessage(Message message) {

        System.out.println(" data :" + message.getBody());

    }
}