Quartz 与 Spring Batch 集成时出现的问题

Question

我正在尝试使用 spring Batch &项目中的石英。目标是使用 Quartz 安排春季批量作业。我有以下 bean -

bean id="updateDataFeedJob"  class="package.UpdateDataFeedJob" />     

<bean id="UpdaterOnScheduleJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
    <property name="targetObject" ref="updateDataFeedJob"/>
    <!-- the method to call inside of com.siemens.scr.schedule.UpdateDataFeedJob -->
    <property name="targetMethod" value="execute"/>
</bean> 

<bean id="cronTriggerId" class="org.springframework.scheduling.quartz.CronTriggerBean">
    <property name="jobDetail" ref="UpdaterOnScheduleJobDetail" />
    <!-- run every morning at 3AM -->
    <!--  <property name="cronExpression" value="0 0 3 * * ?" /> -->

    <!-- Fires every five minutes -->
    <property name="cronExpression" value="0 0/5 * * * ?" />
</bean>

<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    <property name="triggers">
        <list>
            <ref bean="cronTriggerId" />
        </list>
    </property>
</bean>

UpdateDataFeedJob 是 -

public class UpdateDataFeedJob  {   
  public void execute() throws Exception {
    System.out.println("Hello World. Running the job");
    CommandLineJobRunner.main(new String[]{"GetFleetUpdatesJob.xml", "getFleetUpdatesJob"});
  }  
}

示例调用是 -

public class Client {
    public static void main(String[] args){
        //CommandLineJobRunner.main(new String[]{"GetFleetUpdatesJob.xml", "getFleetUpdatesJob"});
        new ClassPathXmlApplicationContext("GetFleetUpdatesJob.xml");
    }   
}

我不断收到以下异常 -

ERROR - Job Terminated in error: A job execution for this job is already running: JobInstance: id=0, JobParameters=[{}], Job=[getFleetUpdatesJob]
org.springframework.batch.core.repository.JobExecutionAlreadyRunningException: A job execution for this job is already running: JobInstance: id=0, JobParameters=[{}], Job=[getFleetUpdatesJob]
    at org.springframework.batch.core.repository.support.SimpleJobRepository.createJobExecution(SimpleJobRepository.java:112)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:98)
    at org.springframework.batch.core.launch.support.CommandLineJobRunner.start(CommandLineJobRunner.java:291)
    at org.springframework.batch.core.launch.support.CommandLineJobRunner.main(CommandLineJobRunner.java:448)
    at com.siemens.scr.schedule.UpdateDataFeedJob.execute(UpdateDataFeedJob.java:10)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276)
    at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)
    at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)

Answer 1

我得到了这个工作。我不知道具体原因&如果有人可以发表评论，我将不胜感激 -

我在 applicationContext.xml 中添加了以下 bean 配置

<bean id="transactionManager" class="org.springframework.batch.support.transaction.ResourcelessTransactionManager"/>

现在我没有得到该异常 & quartz 能够调用 spring 批处理作业

Answer 2

Spring批处理借助提供的作业参数来区分同一作业的不同执行。

如代码示例中所示，您没有传递任何 Job 参数，因此根据 Spring Batch，所有作业执行都将相同，并且任何陷入运行状态的实例都将导致 Spring Batch 抛出 JobAlreadyRunningException。

Answer 3

我们有同样的问题。我们担心有人可能会拧紧石英窗口，而石英没有 ScheduleExector.scheduleAtFixedDelay。它只有 shceduleAtFixedRate，因此批处理作业“可能”重叠，因此我们：

1. 添加作业参数以使作业唯一
2. 将静态变量放入具有 isRunning 的 Javaquartz 触发器中因此，我们不会让作业在一个 JVM 中运行两个实例，以防时间过紧。