嘗試在EJB中創建計時器時出現異常

Question

我剛開始學習計時器，所以我遵循了幾個教程，但是根據教程，每件事情都應該正常工作，但我得到一個異常，下面是我的代碼：

無狀態的bean：

@Stateless 
public class TimerClassingBean implements TimerClassing { 


@Schedule(second = "0,10,20,30,40,50", minute="*", hour = "*") 
public void goTimer(Timer timer) { 
    System.out.println("Inside Timer - printing something"); 
} 

public void printSomething() { 
    System.out.println("Printing something"); 
} 
} 

Bean的接口：

@Remote 
public interface TimerClassing { 

public void goTimer(Timer timer); 
public void printSomething(); 
} 

例外：

10:15:32,462 ERROR [org.jboss.as.ejb3] (EJB default - 3) JBAS014122: Error during retrying  timeout for timer: [id=d4c25897-c340-4416-b200-2d22c722481a  timedObjectId=testingTimer.testingTimer.TimerClassingBean auto-timer?:true persistent?:true  timerService=org.jboss.as.ejb3.timerservice.TimerServiceImpl@5c2594b4 initialExpiration=Thu Jan 23  00:00:00 IST 2014 intervalDuration(in milli sec)=0 nextExpiration=Thu Jan 23 10:15:40 IST 2014  timerState=RETRY_TIMEOUT: javax.ejb.EJBException: java.lang.IllegalArgumentException: argument type  mismatch 
at org.jboss.as.ejb3.tx.CMTTxInterceptor.handleExceptionInOurTx(CMTTxInterceptor.java:166)  [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at  org.jboss.as.ejb3.tx.TimerCMTTxInterceptor.handleExceptionInOurTx(TimerCMTTxInterceptor.java:52) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:230) [jboss-as- ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:304) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:190) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at  org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:43) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss- invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ejb3.timerservice.TimedObjectInvokerImpl.callTimeout(TimedObjectInvokerImpl.java:101) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.as.ejb3.timerservice.task.CalendarTimerTask.callTimeout(CalendarTimerTask.java:60) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.as.ejb3.timerservice.task.TimerTask.run(TimerTask.java:132) [jboss-as-ejb3- 7.1.1.Final.jar:7.1.1.Final] 
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [rt.jar:1.7.0_45] 
at java.util.concurrent.FutureTask.run(Unknown Source) [rt.jar:1.7.0_45] 
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.7.0_45] 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_45] 
at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_45] 
at org.jboss.threads.JBossThread.run(JBossThread.java:122) [jboss-threads-2.0.0.GA.jar:2.0.0.GA] 
Caused by: java.lang.IllegalArgumentException: argument type mismatch 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_45] 
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [rt.jar:1.7.0_45] 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [rt.jar:1.7.0_45] 
at java.lang.reflect.Method.invoke(Unknown Source) [rt.jar:1.7.0_45] 
at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:34) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47) 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final] 
at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:228) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] 
... 21 more 

我錯過了什麼？

Answer 1

註釋@Schedule支持以下二方法簽名

void <METHOD>() 
void <METHOD>(Timer timer) 

服從規則，您要使用此代碼這是確定：

public void goTimer(Timer timer) 

這裏的定時器是javax.ejb.Timer類。由於你的代碼是乾淨的，我懷疑你正在使用任何其他Timer類，如java.util.Timer類。

的suespec的背後原因是，我看到你了java.lang.IllegalArgumentException: argument type mismatch