rabbitmq延迟队列demo

 

工程结构：

 

定义jar包依赖的版本，版本很重要，rabbit依赖spring，必须一致，否则报错：

<properties>
    <springframework.version>4.2.7.release</springframework.version>
    <spring-rabbit.version>1.6.1.release</spring-rabbit.version>
    <junit.version>4.12</junit.version>
</properties>

dependencies：

<dependencies>

    <!-- logging begin -->
    <dependency>
        <groupid>org.slf4j</groupid>
        <artifactid>slf4j-api</artifactid>
        <version>1.7.5</version>
    </dependency>
    <dependency>
        <groupid>ch.qos.logback</groupid>
        <artifactid>logback-core</artifactid>
        <version>1.0.13</version>
    </dependency>
    <dependency>
        <groupid>ch.qos.logback</groupid>
        <artifactid>logback-classic</artifactid>
        <version>1.0.13</version>
    </dependency>
    <!-- 代码直接调用common-logging会被桥接到slf4j -->
    <dependency>
        <groupid>org.slf4j</groupid>
        <artifactid>jcl-over-slf4j</artifactid>
        <version>1.7.5</version>
    </dependency>
    <!-- logging end -->

    <!--springframework-->
    <dependency>
        <groupid>org.springframework</groupid>
        <artifactid>spring-core</artifactid>
        <version>${springframework.version}</version>
    </dependency>
    <dependency>
        <groupid>org.springframework</groupid>
        <artifactid>spring-context</artifactid>
        <version>${springframework.version}</version>
    </dependency>

    <!-- rabbitmq spring依赖 -->
    <dependency>
        <groupid>org.springframework.amqp</groupid>
        <artifactid>spring-rabbit</artifactid>
        <version>${spring-rabbit.version}</version>
    </dependency>

    <!--common utils-->
    <dependency>
        <groupid>com.alibaba</groupid>
        <artifactid>fastjson</artifactid>
        <version>1.2.6</version>
    </dependency>
    <dependency>
        <groupid>org.apache.commons</groupid>
        <artifactid>commons-lang3</artifactid>
        <version>3.3.2</version>
    </dependency>

    <!--test begin-->
    <dependency>
        <groupid>junit</groupid>
        <artifactid>junit</artifactid>
        <version>${junit.version}</version>
        <!--<scope>test</scope>-->
    </dependency>
    <dependency>
        <groupid>org.springframework</groupid>
        <artifactid>spring-test</artifactid>
        <version>${springframework.version}</version>
        <!--<scope>test</scope>-->
    </dependency>
    <!--test end-->
</dependencies>

 

spring-applicationcontext：

<?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-3.2.xsd
       http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd 
         http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">

    <bean class="org.springframework.beans.factory.config.propertyplaceholderconfigurer">
        <property name="fileencoding" value="utf-8"></property>
        <property name="locations">
            <list>
                <value>classpath:applicationcontext.properties</value>
            </list>
        </property>
    </bean>

    <context:annotation-config/>

    <bean class="org.springframework.beans.factory.annotation.autowiredannotationbeanpostprocessor"/>
    <!-- 配置扫描路径 -->
    <context:component-scan base-package="demo"></context:component-scan>

    <!--rabbit server参数 -->
    <rabbit:connection-factory id="connectionfactory"
                               username="${paycenter.mq.user.username}"
                               password="${paycenter.mq.user.password}"
                               addresses="${paycenter.mq.user.host}"></rabbit:connection-factory>

    <import resource="classpath:mq-applicationcontext-producer.xml"/>
    <import resource="classpath:mq-applicationcontext-consumer.xml"/>
</beans>

 

mq-applicationcontext-producer.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-4.0.xsd
     http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     http://www.springframework.org/schema/rabbit
     http://www.springframework.org/schema/rabbit/spring-rabbit-1.6.xsd">

    <!--通过指定下面的admin信息，当前producer中的exchange和queue会在rabbitmq服务器上自动生成 -->
    <rabbit:admin connection-factory="connectionfactory"/>

    <!-- 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 -->
    <bean id="mqmessageconverter"
          class="org.springframework.amqp.support.converter.simplemessageconverter">
    </bean>

    <!--<bean id="publisherconfirmsreturns" class="com.emaxcard.mq.rabbit.publisherconfirmsreturns"></bean>-->


    <!--========================延迟队列配置 begin =========================-->
    <rabbit:queue id="agentpayqueryqueue2" durable="true" auto-delete="true" exclusive="false"
                  name="agentpayqueryqueue2"/>
    <rabbit:direct-exchange id="agentpayqueryexchange2" durable="true" auto-delete="true" name="agentpayqueryexchange2">
        <rabbit:bindings>
            <rabbit:binding queue="agentpayqueryqueue2" key="delay"/>
        </rabbit:bindings>
    </rabbit:direct-exchange>


    <rabbit:queue id="agentpayqueryqueue1" durable="true" auto-delete="true" exclusive="false"
                  name="agentpayqueryqueue1">
        <rabbit:queue-arguments>
            <entry key="x-dead-letter-exchange" value="agentpayqueryexchange2"/>
            <entry key="x-message-ttl" value="10000" value-type="java.lang.long"/>
        </rabbit:queue-arguments>
    </rabbit:queue>
    <rabbit:direct-exchange id="agentpayqueryexchange1" durable="true" auto-delete="true" name="agentpayqueryexchange1">
        <rabbit:bindings>
            <rabbit:binding queue="agentpayqueryqueue1" key="delay"/>
        </rabbit:bindings>
    </rabbit:direct-exchange>

    <!--定义rabbittemplate实例-->
    <!--confirm-callback="publisherconfirmsreturns" return-callback="publisherconfirmsreturns"-->
    <rabbit:template id="agentpayquerymsgtemplate"
                     exchange="agentpayqueryexchange1" routing-key="delay"
                     connection-factory="connectionfactory" message-converter="mqmessageconverter"
                     mandatory="true"
    />
    <!--========================延迟队列配置 end =========================-->

</beans>

 

mq-applicationcontext-consumer.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-4.0.xsd
     http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
     http://www.springframework.org/schema/rabbit
     http://www.springframework.org/schema/rabbit/spring-rabbit-1.6.xsd">


    <bean id="agentpayqueryconsumer" class="demo.testmqconsumer" />

    <!-- todo 后续删除
    receive-timeout:等待接收超时时长 影响连接创建和销毁

    concurrency:消费者个数
    max-concurrency:最大消费者个数
    min-start-interval:陆续启动  减少并发环境(或是三方系统突然的网络延迟) 大量连接导致的性能耗损
    min-stop-interval:陆续销毁   减少突然的安静 导致大量可用连接被销毁
    min-consecutive-active: 连续n次没有接收发生超时  则认定为需要创建 消费者
    min-consecutive-idle: 连续n次发生了接收超时   则认定消费者需要销毁

    prefetch:每个消费者预读条数 因为异步调用三方 性能瓶颈在网络与三方系统所以预读取条数设置为1（默认为5） 只有一条消息被ack才会接收下一条消息
    transaction-size:会影响prefetch的数量
    -->
    <!--  监听器 -->
    <!-- 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-->
    <rabbit:listener-container connection-factory="connectionfactory" acknowledge="auto"
                               max-concurrency="20"
                               concurrency="5"
                               prefetch="10">
        <rabbit:listener ref="agentpayqueryconsumer" queue-names="agentpayqueryqueue2" />
    </rabbit:listener-container>
</beans>

 

 

producer类：

package demo;

import org.junit.test;
import org.junit.runner.runwith;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.amqp.rabbit.core.rabbittemplate;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.test.context.contextconfiguration;
import org.springframework.test.context.junit4.springjunit4classrunner;

@runwith(springjunit4classrunner.class)
@contextconfiguration(locations = "classpath:applicationcontext.xml")
public class testmqproducer {

    private static logger logger = loggerfactory.getlogger(testmqproducer.class.getsimplename());

    @autowired
    private rabbittemplate agentpayquerymsgtemplate;

    @test
    public void test() throws exception {
        for (int i = 0; i <= 100; i++) {
            object data = string.valueof(i);
            agentpayquerymsgtemplate.convertandsend(data);
            logger.info("入队:{}", data);
        }
        thread.sleep(12000);
    }
}

 

 

consumer类：

package demo;

import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.amqp.core.message;
import org.springframework.amqp.core.messagelistener;

public class testmqconsumer implements messagelistener {

    private static logger logger = loggerfactory.getlogger(testmqconsumer.class.getsimplename());

    public void onmessage(message message) {
        string data = new string(message.getbody());

        try {
            //模拟处理慢
            thread.sleep(1);

            logger.info("出队:{}", data);
        } catch (interruptedexception e) {
            e.printstacktrace();
        }

    }

}

 

 

 至此代码就完毕了。

 

说明：上面定义队列时我把auto-delete属性设置为true， 所以，当消费者消费完并关闭连接后，队列会自动删除。exchange也如是。（通过mq控制台看，栗子中的agentpayqueryqueue2和agentpayqueryexchange2在执行完就自动消失了，agentpayqueryqueue1和agentpayqueryexchange1还存在。）

spring-rabbit-x.xml里对queue和exchange的auto-delete属性的解释：

flag indicating that an queue will be deleted when it is no longer in use, i.e. the connection that declared it is closed. default is false.（rabbit:queue）

flag indicating that an exchange will be deleted when no longer in use, i.e. the connection that declared it is closed. default is false.（rabbit:exchange）

 

消费端的concurrency说明：

同样，看spring-rabbit-x.xml的解释：

the number of concurrent consumers to start for each listener initially.
see also 'max-concurrency'.

 

上面我设置的值是5，从mq控制台里看queue的consumer见下图：

从出队日志，可以看出来，共有5个线程在消费这些消息。