最近在学习spring amqp + spring batch + rabbitmq 的一些东西，简单的就是实现向mq中写入日志，使用spring batch批量处理，当然了，在实际生产中这个例子不一定合理，基于学习需要，暂且不秋考虑！！！
因为日志是一直不断记录的，当然不一次就写完，这里使用的是quartz，定时去mq中取数据的方式，spring amqp可以使用listener的方式（SimpleMessageListenerContainer）来监听，尝试了下，没实现，大家可以一起探讨下！
闲话少说，进入正题！
环境：springmvc集成amqp+batch+rabbitmq
主要配置文件有：
- applicationContext.xml
- applicationContext-rabbitmq.xml
- applicationContext-batch-beans.xml
- applicationContext-batch.xml
- applicationContext-quartz.xml
applicationContext.xml就不在介绍，主要是加载properties文件，datasource，当然还有一些公共的配置；
applicationContext-rabbitmq.xml内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans
xmlns="http://www.springframework.org/schema/rabbit"
xmlns:beans="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.xsd
http://www.springframework.org/schema/rabbit
http://www.springframework.org/schema/rabbit/spring-rabbit-1.4.xsd">
<connection-factory
id="rabbitConnectionFactory"
host="${rabbit.mq.host}"
username="${rabbit.mq.user}"
password="${rabbit.mq.pwd}"
port="${rabbit.mq.port}"
connection-timeout="${rabbit.mq.connectionTimeout}"
virtual-host="${rabbit.mq.virtualHost}"
publisher-confirms="true"
publisher-returns="true" />
<admin connection-factory="rabbitConnectionFactory" />
<queue
id="logDirectQueue"
name="log-direct-queue"
durable="true"
auto-delete="false"
exclusive="false" />
<queue
id="logReplyDirectQueue"
name="log-reply-direct-queue"
durable="true"
auto-delete="false"
exclusive="false" />
<direct-exchange
id="logDirectExchange"
name="log-direct-exchange"
durable="true"
auto-delete="false">
<bindings>
<binding
queue="log-direct-queue"
key="log-direct-routing-key" />
</bindings>
</direct-exchange>
<template
id="logDirectTemplate"
queue="log-direct-queue"
exchange="log-direct-exchange"
routing-key="log-direct-routing-key"
connection-factory="rabbitConnectionFactory"
confirm-callback="sendConfirmCallBack"
return-callback="sendReturnCallBack"
recovery-callback="sendRecoveryCallback"
reply-queue="log-reply-direct-queue">
<reply-listener
acknowledge="auto"
auto-startup="true"
min-start-interval="3000" />
</template>
</beans:beans>
配置队列+exchange+binding+template时，需要注意的点，上面已经用红色注明，要保持一致，即将队列（log-direct-queue）与exchange（log-direct-exchange）通过路由规则（log-direct-routing-key）绑定；
applicationContext-batch-beans.xml内容如下：
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean
id="jobLauncher"
class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property
name="jobRepository"
ref="jobRepository" />
</bean>
<bean
id="jobRepository"
class="org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean">
</bean>
<bean
id="amqpItemReader"
class="org.springframework.batch.item.amqp.AmqpItemReader">
<constructor-arg
name="amqpTemplate"
ref="logDirectTemplate" />
<property
name="itemType"
value="com.beauty.entity.BeautyHandlerLogs" />
</bean>
</beans>
上面的不解释，主要说下标记的代码：使用batch自带的AmqpItemReader读取mq中的消息；
applicationContext-batch.xml内容如下：
<beans:beans xmlns="http://www.springframework.org/schema/batch" xmlns:beans="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.xsd http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch.xsd"> <beans:import resource="applicationContext-batch-beans.xml" /> <job id="logProcessJob"> <step id="logStep" allow-start-if-complete="true"> <tasklet> <chunk reader="amqpItemReader" writer="amqpItemWriterImpl" commit-interval="10" /> </tasklet> </step> </job> </beans:beans>
具体配置不介绍了，主要说明下标记代码：只有添加上 allow-start-if-complete="true"，quartz中的定时任务才能不断从mq中获取消息，即 logProcessJob 能不断重复执行，否则只取一次就不再执行了！这个需要特别注意，我也是找了好久，又尝试了好久才搞定的！
注：tasklet 也有该属性，也有同样的功能，可以尝试下！
applicationContext-quartz.xml内容如下：
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean
id="SpringJobSchedulerFactoryBean"
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="cronTriggerBean" />
</list>
</property>
</bean>
<bean
id="cronTriggerBean"
class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property
name="jobDetail"
ref="amqpItemReaderJobMethod" />
<property
name="cronExpression"
value="0/10 * * * * ?" />
</bean>
<bean
id="amqpItemReaderJobMethod"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject">
<ref bean="amqpItemReaderQtz" />
</property>
<property name="targetMethod">
<value>execute</value>
</property>
</bean>
</beans>
使用MethodInvokingJobDetailFactoryBean绑定pojo的方式实现，类的方式报错，版本不一致，于是弃用；
amqpItemReaderQtz 内容如下：
import org.springframework.batch.core.Job;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component("amqpItemReaderQtz")
public class AmqpItemReaderQtz {
@Autowired
private JobLauncher jobLauncher;
@Autowired
private Job logProcessJob;
public void execute() {
try {
JobExecution result = jobLauncher.run(logProcessJob, new JobParameters()); // 调用batch任务
System.out.println(result);
} catch (Exception e) {
e.printStackTrace();
}
}
}
写到这，基本上已经完成了，至于mq环境搭建，发送消息等就不再介绍！
如有问题，可留言讨论，特别是不使用死循环和quartz的场景下，如何能使batch的reader一直能读取mq中的消息的方法，很想学习下！
共勉！！