spring整合消息队列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

<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">


   
   <rabbit:connection-factory id="connectionFactory" host="localhost" username="guest"
        password="guest" port="5672"  />

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

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


   
    <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>

    <-- 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;

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 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)

<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">


   
   <rabbit:connection-factory id="connectionFactory" host="localhost" username="guest"
        password="guest" port="5672"  />

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

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


   
    <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>



    
    <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());
    }
}

6.由于消费端当队列有数据到达时，对应监听的对象就会被通知到，无法做到批量获取，批量入库，因此可以在消费端缓存一个临时队列，将mq取出来的数据存入本地队列，后台线程定时批量处理即可