Apps Cancel a task from ThreadPoolExecutor

[krishnan]

Hi
I have a class which is using ThreadPoolExecutor to submit tasks/Runnables. The task runs fine.
The task/Runnables are submitted with a unique ID.

Que:- If the I want to cancel a specific task (say 3rd task) how can I do that.
Here is the somewhat modified code snippet from my project.

class Task implements Runnalbe {
private String mTaskId;

      public Task(String id) { mTaskId = id; }
     
@Override
	public void run(){
		int i = 100;
		int sleepTime = 500;
		while(i != 0){
			Logging.i(TAG, "###XXX--- TaskID " + mTaskId + " countDown " + i);
			--i;
			
			try{
				Thread.sleep(sleepTime);
			}catch (InterruptedException e){
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
       }
       
	@Override
	public String toString(){
		return mTaskId;
	}
}

/*Class to manage the task*/
class TaskManager{
        	  private ThreadPoolExecutor				mThreadPoolExecutor;
	         private ArrayBlockingQueue<Runnable>	mArrayBlockingQueue;
	         private RejectedExecutionHandlerImpl	mRejectedExeHandler;

        public TaskManager(){
                    		mArrayBlockingQueue = new ArrayBlockingQueue<Runnable>(MAX_QUEUE_SIZE);
		mRejectedExeHandler = new RejectedExecutionHandlerImpl();
		mThreadPoolExecutor = new ThreadPoolExecutor(CORE_POOL_SIZE, MAX_POOL_SIZE, KEEP_ALIVE_TIME, TimeUnit.SECONDS, mArrayBlockingQueue,
				mRejectedExeHandler);
         } 
     
       public boolean addToQueue(Task task){
            mThreadPoolExecutor.submit(downloadTask);
       }
       
       public void cancelTask(String taskId){
       
        // ???????????????????????????????????
       
       }
}


/* Task adding */
    TaskManager taskManager = new TaskManger();
    Task task;
   for(int i = 0; i < 5; i++)
   {
       task = new Task(String.valueOf(i));
       taskManager.addToQueue(task);
   }
   
   taskManager.cancelTask(String.valueOf(3));