定时任务解决方案4 spring quartz 分布式解决 利用数据库保存任务

分布式的任务我大概学习了下,

主要是利用quartz cluster将任务保存到数据库中,

然后利用一定的lock机制,

保证任务执行单例执行等等特性

 

还是先看spring配置文件

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="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-3.0.xsd"default-lazy-init="false"><description>使用Spring Quertz 分布式 定时任务配置</description><!-- 分布式的这个因为数据库表没有down下来,所以暂时搁置了 ,需要去下个quertz.zip --><!-- 或者呢,将数据源换成h2数据库的 ,可以先尝试下h2数据库--><!-- 任务细节 --><bean id="jobDetailOfCluder" class="org.springframework.scheduling.quartz.JobDetailBean"><property name="jobClass" value="cn.test.schedule.spring.SpringQuertzClusterTaskSchedulerTester" /><!-- fail-over 重写执行失败的任务,default=false --><property name="requestsRecovery" value="true"/></bean><!-- 触发器 --><bean id="scheduleTiggerForCluders" class="org.springframework.scheduling.quartz.SimpleTriggerBean"><property name="jobDetail" ref="jobDetailOfCluder"/><property name="repeatInterval" value="1000"/></bean> <!-- 继续定时任务工厂 --> <bean id="schedulerFactoryForCluders" class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="configLocation" value="WEB-INF/classes/cn/test/schedule/spring/quartz-cluster.properties" /> <property name="triggers"> <list> <ref bean="scheduleTiggerForCluders" /> </list> </property> <property name="dataSource" ref="dataSource"/> <property name="applicationContextSchedulerContextKey" value="applicationContext"/> <property name="startupDelay" value="5"/> </bean></beans>

 

 

然后是

quartz-cluster.properties

文件

#============================================================================# Configure Main Scheduler Properties #============================================================================org.quartz.scheduler.instanceName = ClusteredSchedulerorg.quartz.scheduler.instanceId = AUTO#============================================================================# Configure ThreadPool #============================================================================org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPoolorg.quartz.threadPool.threadCount = 5org.quartz.threadPool.threadPriority = 5org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true#============================================================================# Configure JobStore ,importent ,you must modified the table info handlely#============================================================================org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTXorg.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegateorg.quartz.jobStore.misfireThreshold = 60000org.quartz.jobStore.useProperties = falseorg.quartz.jobStore.tablePrefix = QRTZ_org.quartz.jobStore.isClustered = trueorg.quartz.jobStore.clusterCheckinInterval =15000

 

 

 

 

除了配置,我们自己需要实现job的内容

 

package cn.test.schedule.spring;import org.apache.struts2.ServletActionContext;import org.quartz.JobExecutionContext;import org.quartz.JobExecutionException;import org.springframework.context.ApplicationContext;import org.springframework.scheduling.quartz.QuartzJobBean;/** * <p>Title:SpringQuertzClusterTaskSchedulerTester</p> * <p>Description: * 应为要持久化等特性操作,需要继承 QuartzJobBean * <br>由于要被持久化,所以不能存放xxxxManager类似对象, * 只能从每次从QuartzJobBean注入的ApplicationContext 中去取出 * * </p> * <p>Copyright: Copyright (c) 2011</p> * @author Allchin * * @version 1.0 $ 2011-5-19 下午08:03:00 * * */public class SpringQuertzClusterTaskSchedulerTester extends QuartzJobBean {private ApplicationContext applicationContext=null;@Overrideprotected void executeInternal(JobExecutionContext arg0)throws JobExecutionException {System.out.println(ServletActionContext.getServletContext().getServerInfo());}public void setApplicationContext(ApplicationContext applicationContext) {this.applicationContext = applicationContext;}}

 

针对不同的数据库,

要导入的quartz 工作时需要的表与库的sql文件,

这些都可以从网上下载到.