瞭解Eclipse作業系列

Question

我正在學習Eclipse作業API，但找不到有關如何使用系列類的示例的任何文檔。我正在努力創造3個工作，其中前兩個屬於同一個家庭，另外一個屬於不同的家庭。我無法創造出可以提及某個特定家庭的工作。

代碼下面給出： 第一個文件含有工作描述預先

public class Jobsclass{ 



     public static void eclipsejobsfamily() { 

      Job MyFirstJob = new Job("My First Job") { 
      protected IStatus run(IProgressMonitor monitor) { 
        System.out.println("Hello World (1st from a background First job)"); 
        return Status.OK_STATUS; 
       } 
      public boolean belongsTo(Object family) { 
       // TODO Auto-generated method stub 
       if (Jobsutil.MY_FAMILY.equals(family)) { return true; } 
      return false; 
      } 
      }; 


      Job MySecondJob = new Job("My Second Job") { 
      protected IStatus run(IProgressMonitor monitor) { 
        System.out.println("Hello World (2nd from a background Second job)"); 
        return Status.OK_STATUS; 
       } 
      public boolean belongsTo(Object family) { 
       // TODO Auto-generated method stub 
       if (Jobsutil.MY_FAMILY.equals(family)) { return true; } 
      return false; 
      } 
      }; 



      Job MyThirdJob = new Job("My First Job") { 
      protected IStatus run(IProgressMonitor monitor) { 
        System.out.println("Hello World (1st from a background First job)"); 
        return Status.OK_STATUS; 
       } 
      public boolean belongsTo(Object family) { 
       // TODO Auto-generated method stub 
       if (Jobsutil.THE_FAMILY.equals(family)) { return true; } 
      return false; 
      } 
      }; 





      MyFirstJob.wakeUp(); 
      MyFirstJob.schedule(); 
      MySecondJob.setPriority(Job.SHORT); 
      MySecondJob.schedule(); 
      MyThirdJob.wakeUp(); 
      MyThirdJob.schedule(); 


     } 

     protected IStatus run(IProgressMonitor monitor) { 
      // TODO Auto-generated method stub 
      return null; 
     } 

    } 

FILE 2: 
public class Jobsutil { 
    public static final String MY_FAMILY = "myJobFamily"; 
    public static final String THE_FAMILY = "theOtherFamily"; 
} 

public JobAction() { 
    } 
THIRD Class Method RUN(): 
    /** 
    * The action has been activated. The argument of the 
    * method represents the 'real' action sitting 
    * in the workbench UI. 
    * @see IWorkbenchWindowActionDelegate#run 
    */ 
    public void run(IAction action) { 
     MessageDialog.openInformation(
      window.getShell(), 
      "LearnJobAPI", 
      "First example"); 



      if (Jobsutil.MY_FAMILY.equals("myJobFamily")){ 

       } 

      //Job.getJobManager().find("MY_FAMILY"); 
      //Job.getJobManager().wakeUp("MY_FAMILY"); 
      // Jobsclass.eclipsejobsfamily(); 
      this.manager.wakeUp(Jobsutil.MY_FAMILY); 
      Job[] jobscreated= this.manager.find(Jobsutil.MY_FAMILY); 

      Jobsclass.eclipsejobsfamily(); 
    } 

感謝。請幫助我瞭解如何使用家人控制工作。

Answer 1

你Job類必須重寫belongsTo方法來定義它們屬於哪個家庭：

Job myFirstJob = new Job("My First Job") { 
    @Override 
    protected IStatus run(IProgressMonitor monitor) { 
      System.out.println("Hello World (1st from a background First job)"); 
      return Status.OK_STATUS; 
    } 

    @Override 
    public boolean belongsTo(Object family) { 
     return family == MY_FAMILY; 
    } 
}; 

注意：您wakeUp調用什麼都不做，只是叫schedule運行作業。

也請遵循Java命名約定 - 變量名稱以小寫字母開頭。如果不這樣做會擾亂堆棧溢出代碼格式化程序（等等）。

如果你想在不同的家族中運行Job，你必須將家族傳遞給Job構造函數。例如：

class MyJob extend Job 
{ 
    private final Object jobFamily; 

    MyJob(String name, Object family) { 
    super(name); 

    jobFamily = family; 
    } 

    @Override 
    protected IStatus run(IProgressMonitor monitor) { 
     System.out.println("Hello World (1st from a background First job)"); 
     return Status.OK_STATUS; 
    } 

    @Override 
    public boolean belongsTo(Object family) { 
    return family == jobFamily; 
    } 
} 


Job myFirstJob = new MyJob("My First Job", "A"); // family 'A' 

Job myFirstJob = new MyJob("My First Job", "B"); // family 'B'