Quartz SchedulerFactoryBean异常--Spring自动装配惹的祸

Spring的配置文件，启用了自动装配模式：

<beans default-autowire="byName">

<bean id="dataSource" class="..."></bean>

<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" lazy-init="false">
  <property name="triggers">
   <list><ref bean="clearLogsTrigger" /></list>
  </property>
 </bean>

  ...

</beans>

则此时会产生如下错误：

Error creating bean with name 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' defined in file [E:workspaceeis_oracle2webWEB-INFclassesconfspringeisSystemScheduleContext.xml]: Invocation of init method failed; nested exception is org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.impl.jdbcjobstore.LockException: Failure obtaining db row lock: ORA-00942: table or view does not exist

原因：其实这都是Spring的自动装配惹得祸，当存在dataSource的bean，在初始化SchedulerFactoryBean时就自动装配该dataSource属性，此时就启用了jobstore的LocalDataSourceJobStore模式使用数据库来维持状态，quartz的jobstore会从数据库中查询任务。quartz使用数据库进行job状态的维护，但是在数据库中没有找到相应的table，从而无法正常初始化scheduler 。

解决：屏蔽掉自动装配，如下：

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

另：启用jobstore的RAMJobStore（内存存储的）模式，配置如下：

<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" autowire="false">
  <property name="triggers">
   <list> <ref bean="clearLogsTrigger" /></list>
  </property>
  <property name="quartzProperties">
   <props>
    <prop key="org.quartz.jobStore.class">org.quartz.simpl.RAMJobStore</prop>
   </props>
  </property>
 </bean>

当设置了dataSource属性，jobStore属性设置将无效，原因是：

if (this.dataSource != null) {     
    mergedProps.put(StdSchedulerFactory.PROP_JOB_STORE_CLASS, LocalDataSourceJobStore.class.getName());   
}  

详细介绍请参见 SchedulerFactoryBean 方法 setDataSource(DataSource)的javadoc: 

Set the default DataSource to be used by the Scheduler. If set, this will override corresponding settings inQuartz properties. 

Note: If this is set, the Quartz settings should not define a job store "dataSource" to avoid meaningless double configuration. 

A Spring-specific subclass of Quartz' JobStoreCMT will be used. It is therefore strongly recommended to perform all operations on the Scheduler within Spring-managed (or plain JTA) transactions. Else, database locking will not properly work and might even break (e.g. if trying to obtain a lock on Oracle without a transaction). 

Supports both transactional and non-transactional DataSource access. With a non-XA DataSource and local Spring transactions, a single DataSource argument is sufficient. In case of an XA DataSource and global JTA transactions, SchedulerFactoryBean's "nonTransactionalDataSource" property should be set, passing in a non-XA DataSource that will not participate in global transactions.