转自: http://www.iteye.com/topic/399980
在项目中有一个需求,需要灵活配置调度任务时间,并能自由启动或停止调度。
有关调度的实现我就第一就想到了Quartz这个开源调度组件,因为很多项目使用过,Spring结合Quartz静态配置调度任务时间,非常 easy。比如:每天凌晨几点定时运行一个程序,这只要在工程中的spring配置文件中配置好spring整合quartz的几个属性就好。
Spring配置文件
<bean id="jobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> <property name="targetObject" ref="simpleService" /> <property name="targetMethod" value="test" /> </bean> <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean"> <property name="jobDetail" ref="jobDetail" /> <property name="cronExpression" value="0 0/50 * ? * * *" /> </bean> <bean id="schedulerTrigger" class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="triggers"> <list> <ref bean="cronTrigger"/> </list> </property> </bean>
这种配置就是对quartz的一种简单的使用了,调度任务会在spring启动的时候加载到内存中,按照cronTrigger中定义的 cronExpression定义的时间按时触发调度任务。但是这是quartz使用“内存”方式的一种配置,也比较常见,当然对于不使用spring的 项目,也可以单独整合quartz。方法也比较简单,可以从quartz的doc中找到配置方式,或者看一下《Quartz Job Scheduling Framework 》。
但是对于想持久化调度任务的状态,并且灵活调整调度时间的方式来说,上面的内存方式就不能满足要求了,正如本文开始我遇到的情况,需要采用数据库 方式集成 Quartz,这部分集成其实在《Quartz Job Scheduling Framework 》中也有较为详细的介绍,当然doc文档中也有,但是缺乏和spring集成的实例。
一、需要构建Quartz数据库表
建表脚本在Quartz发行包的docs\dbTables目录,里面有各种数据库建表脚本,我采用的 Quartz 1.6.5版本,总共12张表,不同版本,表个数可能不同。我用mysql数据库,执行了Quartz发行包的docs\dbTables \tables_mysql_innodb.sql建表。
二、建立java project,完成后目录如下
三、配置数据库连接池
配置jdbc.properties文件
jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/quartz?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true jdbc.username=root jdbc.password=kfs cpool.checkoutTimeout=5000 cpool.minPoolSize=10 cpool.maxPoolSize=25 cpool.maxIdleTime=7200 cpool.acquireIncrement=5 cpool.autoCommitOnClose=true
配置applicationContext.xml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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd" > <context:component-scan base-package="com.sundoctor"/> <!-- 属性文件读入 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> </list> </property> </bean> <!-- 数据源定义,使用c3p0 连接池 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="${jdbc.driverClassName}" /> <property name="jdbcUrl" value="${jdbc.url}" /> <property name="user" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="initialPoolSize" value="${cpool.minPoolSize}"/> <property name="minPoolSize" value="${cpool.minPoolSize}" /> <property name="maxPoolSize" value="${cpool.maxPoolSize}" /> <property name="acquireIncrement" value="${cpool.acquireIncrement}" /> <property name="maxIdleTime" value="${cpool.maxIdleTime}"/> </bean> </beans>
这里只是配置了数据连接池,我使用c3p0 连接池,还没有涉及到Quartx有关配置,下面且听我慢慢道来。
四、实现动态定时任务
什么是动态定时任务:是由客户制定生成的,服务端只知道该去执行什么任务,但任务的定时是不确定的(是由客户制定)。
这样总不能修改配置文件每定制个定时任务就增加一个trigger吧,即便允许客户修改配置文件,但总需要重新启动web服务啊,研究了下Quartz在Spring中的动态定时,发现
<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean" > <property name="jobDetail" ref="schedulerJobDetail"/> <property name="cronExpression"> <value>0/10 * * * * ?</value> </property>
中cronExpression 是关键,如果可以动态设置cronExpression 的 值,就可以顺利解决问题了。这样我们就不能直接使用 org.springframework.scheduling.quartz.CronTriggerBean,需要自己实现一个动态调度服务类,在其 中构建CronTrigger或SimpleTrigger,动态配置时间。
动态调度服务接口:
package com.sundoctor.quartz.service;
import java.util.Date;
import org.quartz.CronExpression;
public interface SchedulerService {
/**
* 根据 Quartz Cron Expression 调试任务
* @param cronExpression Quartz Cron 表达式,如 "0/10 * * ? * * *"等
*/
void schedule(String cronExpression);
/**
* 根据 Quartz Cron Expression 调试任务
* @param name Quartz CronTrigger名称
* @param cronExpression Quartz Cron 表达式,如 "0/10 * * ? * * *"等
*/
void schedule(String name,String cronExpression);
/**
* 根据 Quartz Cron Expression 调试任务
* @param cronExpression Quartz CronExpression
*/
void schedule(CronExpression cronExpression);
/**
* 根据 Quartz Cron Expression 调试任务
* @param name Quartz CronTrigger名称
* @param cronExpression Quartz CronExpression
*/
void schedule(String name,CronExpression cronExpression);
/**
* 在startTime时执行调试一次
* @param startTime 调度开始时间
*/
void schedule(Date startTime);
/**
* 在startTime时执行调试一次
* @param name Quartz SimpleTrigger 名称
* @param startTime 调度开始时间
*/
void schedule(String name,Date startTime);
/**
* 在startTime时执行调试,endTime结束执行调度
* @param startTime 调度开始时间
* @param endTime 调度结束时间
*/
void schedule(Date startTime,Date endTime);
/**
* 在startTime时执行调试,endTime结束执行调度
* @param name Quartz SimpleTrigger 名称
* @param startTime 调度开始时间
* @param endTime 调度结束时间
*/
void schedule(String name,Date startTime,Date endTime);
/**
* 在startTime时执行调试,endTime结束执行调度,重复执行repeatCount次
* @param startTime 调度开始时间
* @param endTime 调度结束时间
* @param repeatCount 重复执行次数
*/
void schedule(Date startTime,Date endTime,int repeatCount);
/**
* 在startTime时执行调试,endTime结束执行调度,重复执行repeatCount次
* @param name Quartz SimpleTrigger 名称
* @param startTime 调度开始时间
* @param endTime 调度结束时间
* @param repeatCount 重复执行次数
*/
void schedule(String name,Date startTime,Date endTime,int repeatCount);
/**
* 在startTime时执行调试,endTime结束执行调度,重复执行repeatCount次,每隔repeatInterval秒执行一次
* @param startTime 调度开始时间
* @param endTime 调度结束时间
* @param repeatCount 重复执行次数
* @param repeatInterval 执行时间隔间
*/
void schedule(Date startTime,Date endTime,int repeatCount,long repeatInterval) ;
/**
* 在startTime时执行调试,endTime结束执行调度,重复执行repeatCount次,每隔repeatInterval秒执行一次
* @param name Quartz SimpleTrigger 名称
* @param startTime 调度开始时间
* @param endTime 调度结束时间
* @param repeatCount 重复执行次数
* @param repeatInterval 执行时间隔间
*/
void schedule(String name,Date startTime,Date endTime,int repeatCount,long repeatInterval);
}
动态调度服务实现类:
package com.sundoctor.quartz.service;
import java.text.ParseException;
import java.util.Date;
import java.util.UUID;
import org.quartz.CronExpression;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SimpleTrigger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
@Service("schedulerService")
public class SchedulerServiceImpl implements SchedulerService {
private Scheduler scheduler;
private JobDetail jobDetail;
@Autowired
public void setJobDetail(@Qualifier("jobDetail") JobDetail jobDetail) {
this.jobDetail = jobDetail;
}
@Autowired
public void setScheduler(@Qualifier("quartzScheduler") Scheduler scheduler) {
this.scheduler = scheduler;
}
@Override
public void schedule(String cronExpression) {
schedule(null, cronExpression);
}
@Override
public void schedule(String name, String cronExpression) {
try {
schedule(name, new CronExpression(cronExpression));
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
@Override
public void schedule(CronExpression cronExpression) {
schedule(null, cronExpression);
}
@Override
public void schedule(String name, CronExpression cronExpression) {
if (name == null || name.trim().equals("")) {
name = UUID.randomUUID().toString();
}
try {
scheduler.addJob(jobDetail, true);
CronTrigger cronTrigger = new CronTrigger(name, Scheduler.DEFAULT_GROUP, jobDetail.getName(),
Scheduler.DEFAULT_GROUP);
cronTrigger.setCronExpression(cronExpression);
scheduler.scheduleJob(cronTrigger);
scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, cronTrigger);
} catch (SchedulerException e) {
throw new RuntimeException(e);
}
}
@Override
public void schedule(Date startTime) {
schedule(startTime, null);
}
@Override
public void schedule(String name, Date startTime) {
schedule(name, startTime, null);
}
@Override
public void schedule(Date startTime, Date endTime) {
schedule(startTime, endTime, 0);
}
@Override
public void schedule(String name, Date startTime, Date endTime) {
schedule(name, startTime, endTime, 0);
}
@Override
public void schedule(Date startTime, Date endTime, int repeatCount) {
schedule(null, startTime, endTime, 0);
}
@Override
public void schedule(String name, Date startTime, Date endTime, int repeatCount) {
schedule(name, startTime, endTime, 0, 0L);
}
@Override
public void schedule(Date startTime, Date endTime, int repeatCount, long repeatInterval) {
schedule(null, startTime, endTime, repeatCount, repeatInterval);
}
@Override
public void schedule(String name, Date startTime, Date endTime, int repeatCount, long repeatInterval) {
if (name == null || name.trim().equals("")) {
name = UUID.randomUUID().toString();
}
try {
scheduler.addJob(jobDetail, true);
SimpleTrigger SimpleTrigger = new SimpleTrigger(name, Scheduler.DEFAULT_GROUP, jobDetail.getName(),
Scheduler.DEFAULT_GROUP, startTime, endTime, repeatCount, repeatInterval);
scheduler.scheduleJob(SimpleTrigger);
scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, SimpleTrigger);
} catch (SchedulerException e) {
throw new RuntimeException(e);
}
}
}
SchedulerService 只有一个多态方法schedule,SchedulerServiceImpl实现SchedulerService接口,注入 org.quartz.Schedulert和org.quartz.JobDetail,schedule方法可以动态配置 org.quartz.CronExpression或org.quartz.SimpleTrigger调度时间。
五、实现自己的org.quartz.JobDetail
在上一步中SchedulerServiceImpl需要注入org.quartz.JobDetail,在以前的静态配置中
<bean id="jobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> <property name="targetObject" ref="simpleService" /> <property name="targetMethod" value="testMethod" /> </bean>
中使用org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean。 在这里使用org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean。 会报
Caused by: java.io.NotSerializableException: Unable to serialize JobDataMap for insertion into database because the value of property 'methodInvoker' is not serializable: org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean
at org.quartz.impl.jdbcjobstore.StdJDBCDelegate.serializeJobData(StdJDBCDelegate.java:3358)
at org.quartz.impl.jdbcjobstore.StdJDBCDelegate.insertJobDetail(StdJDBCDelegate.java:515)
at org.quartz.impl.jdbcjobstore.JobStoreSupport.storeJob(JobStoreSupport.java:1102)
... 11 more
异常,google了一下,没有找到解决方法。所以在这里不能使用org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean。 ,不能pojo了,需要使用org.springframework.scheduling.quartz.JobDetailBean和org.springframework.scheduling.quartz.QuartzJobBean 实现自己的QuartzJobBean,如下:
package com.sundoctor.example.service;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.quartz.Trigger;
import org.springframework.scheduling.quartz.QuartzJobBean;
public class MyQuartzJobBean extends QuartzJobBean {
private SimpleService simpleService;
public void setSimpleService(SimpleService simpleService) {
this.simpleService = simpleService;
}
@Override
protected void executeInternal(JobExecutionContext jobexecutioncontext) throws JobExecutionException {
Trigger trigger = jobexecutioncontext.getTrigger();
String triggerName = trigger.getName();
simpleService.testMethod(triggerName);
}
}
MyQuartzJobBean继承org.springframework.scheduling.quartz.QuartzJobBean ,注入的SimpleService如下:
package com.sundoctor.example.service;
import java.io.Serializable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
@Service("simpleService")
public class SimpleService implements Serializable{
private static final long serialVersionUID = 122323233244334343L;
private static final Logger logger = LoggerFactory.getLogger(SimpleService.class);
public void testMethod(String triggerName){
//这里执行定时调度业务
logger.info(triggerName);
}
public void testMethod2(){
logger.info("testMethod2");
}
}
SimpleService主要执行定时调度业务,在这里我只是简单打印一下log日志。SimpleService需要实现java.io.Serializable接口,否则会报
Caused by: java.io.InvalidClassException: com.sundoctor.example.service.SimpleService; class invalid for deserialization
at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:587)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
... 64 more
异常。
配置applicationContext-quartz.xml文件:
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<bean name="quartzScheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="applicationContextSchedulerContextKey" value="applicationContextKey" />
<property name="configLocation" value="classpath:quartz.properties"/>
</bean>
<bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailBean">
<property name="jobClass">
<value>com.sundoctor.example.service.MyQuartzJobBean</value>
</property>
<property name="jobDataAsMap">
<map>
<entry key="simpleService">
<ref bean="simpleService" />
</entry>
</map>
</property>
</bean>
</beans>
quartzScheduler中没有了
<property name="triggers"> <list> ... </list> /property>
配置,通过SchedulerService动态加入CronTrigger或SimpleTrigger。
<map>
<entry key="simpleService">
<ref bean="simpleService" />
</entry>
</map>
</property>
中需要注入调度业务类,否则会报空指指错误。
dataSource:项目中用到的数据源,里面包含了quartz用到的12张数据库表;
applicationContextSchedulerContextKey: 是org.springframework.scheduling.quartz.SchedulerFactoryBean这个类中把spring上下 文以key/value的方式存放在了quartz的上下文中了,可以用applicationContextSchedulerContextKey所 定义的key得到对应的spring上下文;
configLocation:用于指明quartz的配置文件的位置,如果不用spring配置quartz的话,本身quartz是通过一 个配置文件进行配置的,默认名称是quartz.properties,里面配置的参数在quartz的doc文档中都有介绍,可以调整quartz,我 在项目中也用这个文件部分的配置了一些属性,代码如下:
org.quartz.scheduler.instanceName = DefaultQuartzScheduler org.quartz.scheduler.rmi.export = false org.quartz.scheduler.rmi.proxy = false org.quartz.scheduler.wrapJobExecutionInUserTransaction = false org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool org.quartz.threadPool.threadCount = 10 org.quartz.threadPool.threadPriority = 5 org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true org.quartz.jobStore.misfireThreshold = 60000 #org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX #org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.HSQLDBDelegate org.quartz.jobStore.driverDelegateClass=org.quartz.impl.jdbcjobstore.StdJDBCDelegate #org.quartz.jobStore.useProperties = true org.quartz.jobStore.tablePrefix = QRTZ_ org.quartz.jobStore.isClustered = false org.quartz.jobStore.maxMisfiresToHandleAtATime=1
这里面没有数据源相关的配置部分,采用spring注入datasource的方式已经进行了配置。
六、测试
运行如下测试类
package com.sundoctor.example.test;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.sundoctor.quartz.service.SchedulerService;
public class MainTest {
/**
* @param args
*/
public static void main(String[] args) {
ApplicationContext springContext = new ClassPathXmlApplicationContext(new String[]{"classpath:applicationContext.xml","classpath:applicationContext-quartz.xml"});
SchedulerService schedulerService = (SchedulerService)springContext.getBean("schedulerService");
//执行业务逻辑...
//设置调度任务
//每10秒中执行调试一次
schedulerService.schedule("0/10 * * ? * * *");
Date startTime = parse("2009-06-01 22:16:00");
Date endTime = parse("2009-06-01 22:20:00");
//2009-06-01 21:50:00开始执行调度
schedulerService.schedule(startTime);
//2009-06-01 21:50:00开始执行调度,2009-06-01 21:55:00结束执行调试
//schedulerService.schedule(startTime,endTime);
//2009-06-01 21:50:00开始执行调度,执行5次结束
//schedulerService.schedule(startTime,null,5);
//2009-06-01 21:50:00开始执行调度,每隔20秒执行一次,执行5次结束
//schedulerService.schedule(startTime,null,5,20);
//等等,查看com.sundoctor.quartz.service.SchedulerService
}
private static Date parse(String dateStr){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
return format.parse(dateStr);
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
}
输出
[2009-06-02 00:10:20]INFO com.sundoctor.example.service.SimpleService(line:17) -2059c26f-9462-49fe-b4ce-be7e7a29459f
[2009-06-02 00:10:30]INFO com.sundoctor.example.service.SimpleService(line:17) -2059c26f-9462-49fe-b4ce-be7e7a29459f
[2009-06-02 00:10:40]INFO com.sundoctor.example.service.SimpleService(line:17) -2059c26f-9462-49fe-b4ce-be7e7a29459f
[2009-06-02 00:10:50]INFO com.sundoctor.example.service.SimpleService(line:17) -2059c26f-9462-49fe-b4ce-be7e7a29459f
[2009-06-02 00:11:00]INFO com.sundoctor.example.service.SimpleService(line:17) -2059c26f-9462-49fe-b4ce-be7e7a29459f
[2009-06-02 00:11:10]INFO com.sundoctor.example.service.SimpleService(line:17) -2059c26f-9462-49fe-b4ce-be7e7a29459f
这样只是简单的将quartz trigger名称打印出来。
这样通过SchedulerService就可以动态配置调度时间。其实SchedulerService 还可扩展,比如可以注入多个JobDetail,调度不同的JobDetail。
将 cron 写入数据库配制是
具体的配置就是将 org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore 换成 org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX 就会自动入库了
其实SchedulerService 还可扩展,比如可以注入多个JobDetail,调度不同的JobDetail
首先实现多个JobDeatail并注册,比如:
<bean id="jobDetail1" class="org.springframework.scheduling.quartz.JobDetailBean"> <property name="jobClass"> <value>com.sundoctor.example.service.MyQuartzJobBean1</value> </property> <bean id="jobDetail2" class="org.springframework.scheduling.quartz.JobDetailBean"> <property name="jobClass"> <value>com.sundoctor.example.service.MyQuartzJobBean2</value> </property> <bean id="jobDetail3" class="org.springframework.scheduling.quartz.JobDetailBean"> <property name="jobClass"> <value>com.sundoctor.example.service.MyQuartzJobBean3</value> </property> ...
其次将多个JobDeatail放到一个HashMap中
<util:map id = "jobDeatailMap" map-class="java.util.HashMap" key-type="java.lang.String" value-type="org.springframework.scheduling.quartz.JobDetailBean"> <entry key="jobDetail1" ref="jobDetail1"/> <entry key="jobDetail2" ref="jobDetail2"/> <entry key="jobDetail3" ref="jobDetail3"/> </util:map>
然后在SchedulerService 注入jobDeatailMap
@Service("schedulerService")
public class SchedulerServiceImpl implements SchedulerService {
private Scheduler scheduler;
private Map<String,JobDetailBean> jobDeatailMap;
@Autowired
public void setJobDeatailMap(@Qualifier("jobDeatailMap") Map<String,JobDetailBean> jobDeatailMap) {
this.jobDeatailMap = jobDeatailMap;
}
@Autowired
public void setScheduler(@Qualifier("quartzScheduler") Scheduler scheduler) {
this.scheduler = scheduler;
}
...
最后,修改SchedulerServiceImpl中的schedule方法,增加以jobDeatailMap KEY名字为参数:
@Override
public void schedule(String jobDetailName,String name, CronExpression cronExpression) {
if (name == null || name.trim().equals("")) {
name = UUID.randomUUID().toString();
}
//这个时候JobDetail根据jobDetailName从jobDeatailMap获取
JobDetail jobDetail = jobDeatailMap.get(jobDetailName);
try {
scheduler.addJob(jobDetail, true);
CronTrigger cronTrigger = new CronTrigger(name, Scheduler.DEFAULT_GROUP, jobDetail.getName(),
Scheduler.DEFAULT_GROUP);
cronTrigger.setCronExpression(cronExpression);
scheduler.scheduleJob(cronTrigger);
scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, cronTrigger);
} catch (SchedulerException e) {
throw new RuntimeException(e);
}
}
其它多态方法一样修改,增加jobDetailName参数。
调用时,传不同的jobDetailName参数就可以调用不用的JobDetail。
SchedulerService schedulerService = (SchedulerService)springContext.getBean("schedulerService");
schedulerService.schedule("jobDetail1","审计任务","0/10 * * ? * * *");
schedulerService.schedule("jobDetail2","发放任务","0/10 * * ? * * *");
schedulerService.schedule("jobDetail3","AAA任务","0/10 * * ? * * *");
其实很多时候只需要一个JobDetail就可以了,也可以达到多个JobDetail一样的效果,一个JobDetail的时候可以在Trigger名称上做扩展,可以在调度任务时给Trigger名称加上不同的前缀或后缀,比如Trigger名称增加一个前缀参数,
@Override
public void schedule(String name, String prefix ,CronExpression cronExpression) {
if (name == null || name.trim().equals("")) {
name = UUID.randomUUID().toString();
}
try {
scheduler.addJob(jobDetail, true);
//给Trigger名秒加上前缀
name = prefix + name;
CronTrigger cronTrigger = new CronTrigger(name, Scheduler.DEFAULT_GROUP, jobDetail.getName(),
Scheduler.DEFAULT_GROUP);
cronTrigger.setCronExpression(cronExpression);
scheduler.scheduleJob(cronTrigger);
scheduler.rescheduleJob(name, Scheduler.DEFAULT_GROUP, cronTrigger);
} catch (SchedulerException e) {
throw new RuntimeException(e);
}
}
然后在QuartzJobBean中的executeInternal方法取到Trigger名秒,然后根据其前缀或后缀调用不同的业务逻辑
public class MyQuartzJobBean extends QuartzJobBean {
private SimpleService simpleService;
public void setSimpleService(SimpleService simpleService) {
this.simpleService = simpleService;
}
@Override
protected void executeInternal(JobExecutionContext jobexecutioncontext) throws JobExecutionException {
Trigger trigger = jobexecutioncontext.getTrigger();
//取得Trigger名称,判断名称前缀或后缀调用不同的业务逻辑
String triggerName = trigger.getName();
if(tirggerName ...){
simpleService.testMethod(triggerName);
}else if(tirggerName ...){
simpleService.testMethod2(triggerName);
}else{
...
}
}
}
上面说过simpleService和其中注入各属性需要实现Serializable序列化接口,你的BakcupDao继承自 HibernateDaoSupport虽然也实现了序列化接口,但是HibernateDaoSupport里的HibernateTemplate并 没有实现序列化接口,所以你取得的HibernateTemplate永远为null。因此获取HibernateTemplate必须换一种方式,你的 BakcupDao不能继承自HibernateDaoSupport。HibernateTemplate没有实现序列化接口,而 SessionFactory是实现序列化接口的,在bakcupDao注入SessionFactory,通过SessionFactory获取 HibernateTemplate。
你的bakcupDao可以这样写
import java.io.Serializable;
import org.hibernate.SessionFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import com.sundoctor.example.service.SimpleService;
@Repository("bakcupDao")
public class BakcupDao implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private SessionFactory sessionFactory;
@Autowired
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public boolean backupDateabase(String dbname, String bfname) {
final String dbName = dbname;
final String bfname1 = bfname;
HibernateTemplate hibernateTemplate = new HibernateTemplate(sessionFactory);
return (Boolean)hibernateTemplate.execute(new HibernateCallback() {
public Object doInHibernate(Session session) {
boolean flag = true;
PreparedStatement pstmt = null;
try {
pstmt = session.connection().prepareStatement("{call p_Backup_Or_Restore(?,?,?)}");
pstmt.setString(1, bfname1);
pstmt.setString(2, dbName);
pstmt.setInt(3, 1);
pstmt.execute();
System.out.println("数据库已备份");
} catch (Exception e) {
flag = false;
e.printStackTrace();
}
return flag;
}
});
}
}