quartz中設置Job不並發執行

使用quartz框架可以完成定時任務處理即Job，比如有時候我們設置1個Job每隔5分鍾執行1次，后來會發現當前Job啟動的時候上一個Job還沒有運行結束，這顯然不是我們期望的，此時可以設置quartz中的參數，來確保Job不並發執行

1. quartz未與Spring結合

 

//可以通過在實現Job接口的類上加注解的方式
@DisallowConcurrentExecution
public class TestJob implements Job{
 @Override
 public void execute(JobExecutionContext arg0) throws JobExecutionException {
  System.out.println("test");
 }
}

 

2. quartz與spring集成，設置配置文件concurrent參數為false

 

<bean id="fetchOneJob" class="hm.com.job.FetchDataFromOrgJDBC"/>
 <bean id="fetchOneJobTask"
  class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
   <property name="concurrent" >
    <value>false</value>
   </property>
  <property name="targetObject">
   <ref bean="fetchOneJob" />
  </property>
  <property name="targetMethod">
   <value>work</value>
  </property>
 </bean>
 <bean id="fetchOneJobTime" class="org.springframework.scheduling.quartz.CronTriggerBean">
  <property name="jobDetail">
   <ref bean="fetchOneJobTask" />
  </property>
  <property name="cronExpression">
   <value>0 0/3 * * * ?</value>
  </property>
 </bean>
 <bean id="startFetchOneJobTime" lazy-init="false" autowire="no"
  class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
  <property name="triggers">
   <list>
    <ref bean="fetchOneJobTime" />
   </list>
  </property>
 </bean>