參數化EJB調度附表表達

Question

我使用EJB 3.1和jboss-EAP-6.4，我想設置一些動態參數，小時，分鐘和EJB調度的第二如下：

非參數代碼 - 這在每5分鐘的第30秒運行：

@Singleton 
@Startup 
public class TriggerJob { 
    @EJB 
    //some db injections   

    @PostConstruct 
    public void onStartup() { 
     try { 
      preparation(); 
     } catch (CertificateVerificationException e) { 
      e.printStackTrace(); 
     } 
    } 

    @Schedule(second = "30", minute = "*/5", hour = "*", persistent = false) 
    public void preparation() { 
    //my scheduled tasks 
    } 
} 

上面的代碼正確執行。

動態參數代碼 - 這應該在每5分鐘的第30秒運行：

@Singleton 
@Startup 
public class TriggerJob { 

    @EJB 
    //some injections 

    private boolean runningFlag = false; 

    @Resource 
    private TimerService timerService; 

    public void setTimerService(TimerService timerService) { 
     this.timerService = timerService; 
    } 

    @Timeout 
    public void timerTimeout() { 
     try { 
      preparation(); 
     } catch (CertificateVerificationException e) { 
      e.printStackTrace(); 
     } 
    } 

    @PostConstruct 
    private void postCunstruct() { 
     timerService.createCalendarTimer(createSchedule(),new TimerConfig("EJB timer service timeout at ",false)); 
    } 

    private ScheduleExpression createSchedule() { 
     ScheduleExpression expression = new ScheduleExpression(); 
     expression.hour("*") 
       .minute("*/5") 
       .second("30"); 
     return expression; 
    } 

    public void preparation(){ 
    // my scheduled tasks 
    } 
} 

上面的代碼不正確執行，通常它在第二執行多次。

另外，我看了這並沒有幫助我的一些其他問題：

Dynamic parameters for @Schedule method in an EJB 3.x

Using the Timer Service - The Java EE 6 Tutorial

任何幫助，將不勝感激。

Answer 1

相反，使用編程調度，這裏是一個〔實施例：

@Singleton 
@Startup 
public class TriggerJob{ 

    @EJB 
    //some injections 

    @Resource 
    private TimerService timerService; 

    @PostConstruct 
    public void init() { 
     createTimer(); 
     //the following code resolve my startup problem 
     try { 
     preparation(); 
     } catch (CertificateVerificationException e) { 
      e.printStackTrace(); 
     } 
    } 

    @Timeout 
    public void timerTimeout() { 
     try { 
     preparation(); 
     } catch (CertificateVerificationException e) { 
     e.printStackTrace(); 
     } 
    } 

    private void createTimer() { 
     ScheduleExpression scheduleExpression = new ScheduleExpression(); 
     scheduleExpression.second("30").minute("*/5").hour("*"); 
     TimerConfig timerConfig = new TimerConfig(); 
     timerConfig.setPersistent(false); 
     timerService.createCalendarTimer(scheduleExpression, timerConfig); 
     } 

    public void preparation(){ 
     // my scheduled tasks 
    } 
}