EJB 3.1自动计时器(@schedule)无法识别oracle计时器表

Question

我们尝试使用EJB3.1计时器组件。

我们的需求很简单。每分钟在java类中调用一个方法。要使此组件工作：

[2/5/15 15:06:40:605 EST] 00000000 ContainerHelp E   WSVR0501E: Error creating component com.ibm.ws.runtime.component.CompositionUnitMgrImpl@7a9149c4
com.ibm.ws.exception.RuntimeWarning: Error while processing references for EJB-in-WAR: com.ibm.ejs.container.ContainerException: EJB Timer Service not available for TimedObject EJB: com.ford.doesbatch.inbound.scheduler.DoesBatchScheduler
    at com.ibm.ws.runtime.component.EJBContainerImpl.createNestedModuleMetaData(EJBContainerImpl.java:3434)
    at com.ibm.ws.runtime.component.EJBContainerImpl.createNestedModuleMetaData(EJBContainerImpl.java:726)
    at com.ibm.ws.runtime.component.MetaDataMgrImpl.createNestedModuleMetaData(MetaDataMgrImpl.java:564)
    at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:633)
    at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:967)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:769)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl$5.run(ApplicationMgrImpl.java:2160)
    at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:5468)
    at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5594)
    at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2165)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:446)
    at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:389)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:117)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$CUInitializer.run(CompositionUnitMgrImpl.java:995)
    at com.ibm.wsspi.runtime.component.WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:496)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1700)
Caused by: com.ibm.ejs.container.ContainerException: EJB Timer Service not available for TimedObject EJB: com.ford.doesbatch.inbound.scheduler.DoesBatchScheduler
    at com.ibm.ws.runtime.component.WASEJBRuntimeImpl.setupTimers(WASEJBRuntimeImpl.java:527)
    at com.ibm.ws.metadata.ejb.EJBMDOrchestrator.processAutomaticTimerMetaData(EJBMDOrchestrator.java:6347)
    at com.ibm.ws.metadata.ejb.EJBMDOrchestrator.finishBMDInitForReferenceContext(EJBMDOrchestrator.java:8379)
    at com.ibm.ws.ejbcontainer.runtime.AbstractEJBRuntime.finishBMDInitForReferenceContext(AbstractEJBRuntime.java:2572)
    at com.ibm.ws.runtime.component.EJBContainerImpl.createNestedModuleMetaData(EJBContainerImpl.java:3427)
    ... 17 more

问题：

EJB无法查找EJBTIMER表空间。我们可以在application.py或IBM WebConsole中进行设置。

Answer 1

经过一些分析，我认为如果@schedule注释将持久性表示为“true”，那么它将查找EJB表前缀，我们在WebPshere8的application.py中提到了这一点。

解决方案：

在我的例子中，所有ejb表都是在名为EJBTimer的表空间下创建的。显然，此表空间没有分配空间。

下面是我们如何向WebSphere提及我们的ejb表前缀。因此，websphere将读取您的application.py并了解您的EJB计时器设置。

EJB_TIMER_SETTINGS=[]
EJB_TIMER_SETTINGS.append(["datasourceAlias"  ,"xxxx/ejbTimerJDBC"])
EJB_TIMER_SETTINGS.append(["datasourceJNDIName"  ,"jdbc/xxxx/ejbTimerJDBC"])
EJB_TIMER_SETTINGS.append(["tablePrefix"  ,"XXXXO13_EJBTIMER_"])
EJB_TIMER_SETTINGS.append(["numAlarmThreads"  ,"2"])
EJB_TIMER_SETTINGS.append(["pollInterval", 60])