Examples of er.extensions.concurrency.IERXStoppable

er.extensions.concurrency.IERXStoppable

Interface that identifies an object as stoppable. Useful for long running tasks. Note that this is not named IERXCancellable since canceling a task implies that data is unaffected, whereas stopping something may indicate that the task has been partially completed. Either way, classes that implement this interface should stop gracefully and not leave the object graph in a completely unstable state. For example if a task is processing 100 objects, then stopping it while it is working on object #51 should not result in item #51 being left in a semi-processed state. Ideally, the end result of stopping should be that either 50 or 51 items are completely processed and others are not processed at all. Typically implementations use this method to set a boolean flag, which is then checked at the start of the loop before processing the next item. @author kieran

    }
    return show;
  }


  public WOActionResults stopTask() {
    IERXStoppable task = loopStopTask();
    if (task != null) {
      task.stop();
    } //~ if (task != null)
    return null;
  }

  
  /**
   * @return the current task if it implements {@link IERXStoppable}, otherwise returns null.
   */
  private IERXStoppable loopStopTask() {
    IERXStoppable iERXStop = null;
    ERXTaskInfo info = loopTaskItem();
    Object task = info.task();


    if (task instanceof ERXFutureTask) {
      task = ((ERXFutureTask)task).task();

   * @return null
   */
  public WOActionResults stopTask() {
    Object task = future().task();
    if (task instanceof IERXStoppable) {
      IERXStoppable stoppable = (IERXStoppable)task;
      stoppable.stop();
      _wasStoppedByUser = true;
    }
    return null;
  }

Related Classes of er.extensions.concurrency.IERXStoppable

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