转载：spring4.0 整合 Quartz 实现动态任务调度

项目ITP(六) spring4.0 整合 Quartz 实现动态任务调度 - Jeff Li

时间 2014-05-18 12:51:00 博客园-原创精华区
原文 http://www.cnblogs.com/Alandre/p/3735072.html
主题 Quartz Spring

系列文章： [传送门]

项目需求：

/article/5151036.html

上一博客写的是基本调度，后来这只能用于，像每天定个时间 进行数据库备份。但是，远远不能在上次的需求上实现。所以需要实现spring4.0 整合 Quartz 实现动态任务调度。

正文

spring4.0 整合 Quartz 实现 任务调度 。这真是期末项目的最后一篇，剩下到暑假吧。

Quartz 介绍

Quartz is a full-featured, open source job scheduling service that can be integrated with, or used along side virtually any Java application - from the smallest stand-alone application to the largest e-commerce system. Quartz can be used to create simple
or complex schedules for executing tens, hundreds, or even tens-of-thousands of jobs;

Quartz框架是一个全功能、开源的任务调度服务，可以集成几乎任何的java应用程序—从小的单片机系统到大型的电子商务系统。Quartz可以执行上千上万的任务调度。
核心概念

Quartz核心的概念：scheduler任务调度、Job任务、Trigger触发器、JobDetail任务细节

相关文档： http://www.quartz-scheduler.org/documentation/quartz-2.2.x/quick-start

回顾

上次我们配置了

<!--Quartz-->

<!-- 集成方式：JobDetailFactoryBean，并且任务类需要继承QuartzJobBean-->
<!-- 定义jobDetail -->
<bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailFactoryBean">
<!-- durability 表示任务完成之后是否依然保留到数据库，默认false   -->
<property name="durability" value="true" />
<!--	 目标类  /wmuitp/src/test/SpringQuartz.java-->
<property name="jobClass" value="test.SpringQuartzTest"></property>

<!--  在这个例子中，jobDataAsMap没有用，此目标类中接受的参数 ,若参数为service，则可以在此进行参数配置，类似struts2 -->
<!--
<property name="jobDataAsMap">
<map>
<entry key="service"><value>simple is the beat</value></entry>
</map>
</property>
-->
</bean>

<!-- 定义simpleTrigger触发器 -->
<!--
<bean id="simpleTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
<property name="jobDetail" ref="jobDetail"></property>
<property name="repeatCount">
<value>8</value>
</property>
<property name="repeatInterval">
<value>1000</value>
</property>
<property name="startDelay">
<value>4</value>
</property>
</bean>
-->

<!-- 另一种触发器是CornTrigger -->
<bean id="cornTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="jobDetail"/>
<!-- 每个10秒触发 -->
<property name="cronExpression" value="0/10 * * * * ?"/>
</bean>

<!-- 定义核心调度器 -->
<bean id="scheduler" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<ref bean="cornTrigger"/>
</property>
</bean>

#spring实现quartz的方式，先看一下上面配置文件中定义的jobDetail。在Quartz 2.x版本中JobDetail已经是一个接口， Spring是通过将其转换为MethodInvokingJob或StatefulMethodInvokingJob类型来实现的。

这是文档中的源码：

/**
* This implementation applies the passed-in job data map as bean property
* values, and delegates to <code>executeInternal</code> afterwards.
* @see #executeInternal
*/
public final void execute(JobExecutionContext context) throws JobExecutionException {
try {
// Reflectively adapting to differences between Quartz 1.x and Quartz 2.0...
Scheduler scheduler = (Scheduler) ReflectionUtils.invokeMethod(getSchedulerMethod, context);
Map mergedJobDataMap = (Map) ReflectionUtils.invokeMethod(getMergedJobDataMapMethod, context);

BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this);
MutablePropertyValues pvs = new MutablePropertyValues();
pvs.addPropertyValues(scheduler.getContext());
pvs.addPropertyValues(mergedJobDataMap);
bw.setPropertyValues(pvs, true);
}
catch (SchedulerException ex) {
throw new JobExecutionException(ex);
}
executeInternal(context);
}

/**
* Execute the actual job. The job data map will already have been
* applied as bean property values by execute. The contract is
* exactly the same as for the standard Quartz execute method.
* @see #execute
*/
protected abstract void executeInternal(JobExecutionContext context) throws JobExecutionException;

MethodInvokingJobDetailFactoryBean中的源码：

public void afterPropertiesSet() throws ClassNotFoundException, NoSuchMethodException {
prepare();

// Use specific name if given, else fall back to bean name.
String name = (this.name != null ? this.name : this.beanName);

// Consider the concurrent flag to choose between stateful and stateless job.
Class jobClass = (this.concurrent ? MethodInvokingJob.class : StatefulMethodInvokingJob.class);

// Build JobDetail instance.
if (jobDetailImplClass != null) {
// Using Quartz 2.0 JobDetailImpl class...
this.jobDetail = (JobDetail) BeanUtils.instantiate(jobDetailImplClass);
BeanWrapper bw = PropertyAccessorFactory.forBeanPropertyAccess(this.jobDetail);
bw.setPropertyValue("name", name);
bw.setPropertyValue("group", this.group);
bw.setPropertyValue("jobClass", jobClass);
bw.setPropertyValue("durability", true);
((JobDataMap) bw.getPropertyValue("jobDataMap")).put("methodInvoker", this);
}
else {
// Using Quartz 1.x JobDetail class...
this.jobDetail = new JobDetail(name, this.group, jobClass);
this.jobDetail.setVolatility(true);
this.jobDetail.setDurability(true);
this.jobDetail.getJobDataMap().put("methodInvoker", this);
}

// Register job listener names.
if (this.jobListenerNames != null) {
for (String jobListenerName : this.jobListenerNames) {
if (jobDetailImplClass != null) {
throw new IllegalStateException("Non-global JobListeners not supported on Quartz 2 - " +
"manually register a Matcher against the Quartz ListenerManager instead");
}
this.jobDetail.addJobListener(jobListenerName);
}
}

postProcessJobDetail(this.jobDetail);
}

#既然知道了其所以然，我们就可以真正实战了。

实战

听我慢慢道来

减少spring的配置文件

为了实现一个定时任务，spring的配置代码太多了。动态配置需要们手动来搞。这里我们只需要这要配置即可:

<!-- quartz配置  动态配置所以我们将 Factory 作为一个service一样的接口 QuartzJobFactory.java-->
<!-- 调度工厂 -->
<bean id="schedulerFactoryBean" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
</bean>

Job实现类

在这里我把它看作工厂类:

package test;

import org.quartz.DisallowConcurrentExecution;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

@DisallowConcurrentExecution
public class QuartzJobFactoryImpl implements Job
{

@Override
public void execute(JobExecutionContext context) throws JobExecutionException
{
System.out.println("任务成功运行");
ScheduleJob scheduleJob = (ScheduleJob)context.getMergedJobDataMap().get("scheduleJob");
System.out.println("任务名称 = [" + scheduleJob.getJobName() + "]");
}

}

任务对应实体类

package test;

public class ScheduleJob
{
/** 任务id **/
private String jobId;

/** 任务名称 **/
private String jobName;

/** 任务分组 **/
private String jobGroup;

/** 任务状态 0禁用 1启用 2删除**/
private String jobStatus;

/** 任务运行时间表达式 **/
private String cronExpression;

/** 任务描述 **/
private String desc;

public String getJobId()
{
return jobId;
}

public void setJobId(String jobId)
{
this.jobId = jobId;
}

public String getJobName()
{
return jobName;
}

public void setJobName(String jobName)
{
this.jobName = jobName;
}

public String getJobGroup()
{
return jobGroup;
}

public void setJobGroup(String jobGroup)
{
this.jobGroup = jobGroup;
}

public String getJobStatus()
{
return jobStatus;
}

public void setJobStatus(String jobStatus)
{
this.jobStatus = jobStatus;
}

public String getCronExpression()
{
return cronExpression;
}

public void setCronExpression(String cronExpression)
{
this.cronExpression = cronExpression;
}

public String getDesc()
{
return desc;
}

public void setDesc(String desc)
{
this.desc = desc;
}

}

下面我们就来测试下：

Controller 测试代码：

　　@RequestMapping(value = "/quartz")
public ModelAndView quartz() throws SchedulerException
{

//schedulerFactoryBean 由spring创建注入
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
System.out.println(ctx);
Scheduler scheduler = (Scheduler)ctx.getBean("schedulerFactoryBean");

System.out.println(scheduler);
//这里获取任务信息数据
List<ScheduleJob> jobList = new ArrayList<ScheduleJob>();

for (int i = 0; i < 3; i++) {
ScheduleJob job = new ScheduleJob();
job.setJobId("10001" + i);
job.setJobName("JobName_" + i);
job.setJobGroup("dataWork");
job.setJobStatus("1");
job.setCronExpression("0/5 * * * * ?");
job.setDesc("数据导入任务");
jobList.add(job);
}

for (ScheduleJob job : jobList) {

TriggerKey triggerKey = TriggerKey.triggerKey(job.getJobName(), job.getJobGroup());

//获取trigger，即在spring配置文件中定义的 bean id="myTrigger"
CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);

//不存在，创建一个
if (null == trigger) {
JobDetail jobDetail = JobBuilder.newJob(QuartzJobFactoryImpl.class)
.withIdentity(job.getJobName(), job.getJobGroup()).build();
jobDetail.getJobDataMap().put("scheduleJob", job);

//表达式调度构建器
CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job
.getCronExpression());

//按新的cronExpression表达式构建一个新的trigger
trigger = TriggerBuilder.newTrigger().withIdentity(job.getJobName(), job.getJobGroup()).withSchedule(scheduleBuilder).build();
scheduler.scheduleJob(jobDetail, trigger);
} else {
// Trigger已存在，那么更新相应的定时设置
//表达式调度构建器
CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(job
.getCronExpression());

//按新的cronExpression表达式重新构建trigger
trigger = trigger.getTriggerBuilder().withIdentity(triggerKey)
.withSchedule(scheduleBuilder).build();

//按新的trigger重新设置job执行
scheduler.rescheduleJob(triggerKey, trigger);
}
}

ModelAndView mav = new ModelAndView(AdminWebConstant.ADMIN_LOGIN_VIEW);
return mav;
}

#后面这块应该会进一步整理。到时候 会出个更详细的。期待吧

测试结果：

总结

spring quartz

感谢及资源共享