Examples of com.google.appengine.tools.pipeline.impl.tasks.Task

Package com.google.appengine.tools.pipeline.impl.tasks

Examples of com.google.appengine.tools.pipeline.impl.tasks.Task

com.google.appengine.tools.pipeline.impl.tasks.Task
An App Engine Task Queue Task. This is the abstract base class for all Pipeline task types.
This class represents both a task to be enqueued and a task being handled.
When enqueueing a task, construct a concrete subclass with the appropriate data, and then add the task to an {@link com.google.appengine.tools.pipeline.impl.backend.UpdateSpec} and{@link com.google.appengine.tools.pipeline.impl.backend.PipelineBackEnd#save save}. Alternatively the task may be enqueued directly using {@link com.google.appengine.tools.pipeline.impl.backend.PipelineBackEnd#enqueue(Task)}.
When handling a task, construct a {@link Properties} object containing therelevant parameters from the request, its name and then invoke {@link #fromProperties(String,Properties)}. @author rudominer@google.com (Mitch Rudominer)

      } else {
        if (null != jobRecord.getExceptionHandlingAncestorKey()) {
          cancelChildren(jobRecord, null);
          // current job doesn't have an error handler. So just delegate it to the
          // nearest ancestor that has one.
          Task handleChildExceptionTask = new HandleChildExceptionTask(
              jobRecord.getExceptionHandlingAncestorKey(), jobRecord.getKey(),
              jobRecord.getQueueSettings());
          updateSpec.getFinalTransaction().registerTask(handleChildExceptionTask);
        } else {
          rootJobRecord.setState(State.STOPPED);

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        }
        if (shouldBeReleased) {
          Key jobKey = barrier.getJobKey();
          JobRecord jobRecord = queryJobOrAbandonTask(jobKey, JobRecord.InflationType.NONE);
          jobRecord.getQueueSettings().merge(hsfTask.getQueueSettings());
          Task task;
          switch (barrier.getType()) {
            case RUN:
              task = new RunJobTask(jobKey, jobRecord.getQueueSettings());
              break;
            case FINALIZE:

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      updateSpec.getNonTransactionalGroup().includeJob(jobRecord);
      updateSpec.getNonTransactionalGroup().includeJob(rootJobRecord);
      backEnd.save(updateSpec);
      int backoffFactor = jobRecord.getBackoffFactor();
      int backoffSeconds = jobRecord.getBackoffSeconds();
      Task task = new RunJobTask(jobRecord.getKey(), attemptNumber);
      task.setDelaySeconds(backoffSeconds * (long) Math.pow(backoffFactor, attemptNumber));
      task.setOnBackend(jobRecord.getOnBackend());
      backEnd.enqueue(task);
    }
    logger.log(Level.SEVERE, "An exception occurred while attempting to run " + jobRecord + ". "
        + "This was attempt number " + attemptNumber + " of " + maxAttempts + ".", e);

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            break;
          }
        }
        if (shouldBeReleased) {
          Key jobKey = barrier.getJobKey();
          Task task;
          switch (barrier.getType()) {
          case RUN:
              task = new RunJobTask(jobKey);
              break;
          case FINALIZE:

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  public static final String TASK_NAME_REQUEST_HEADER = "X-AppEngine-TaskName";
  public static final String TASK_RETRY_COUNT_HEADER = "X-AppEngine-TaskRetryCount";


  public static void doPost(HttpServletRequest req, HttpServletResponse resp)
      throws ServletException {
    Task task = null;
    int retryCount = -1;
    try {
      retryCount = Integer.parseInt(req.getHeader(TASK_RETRY_COUNT_HEADER));
    } catch (Exception e) {
      // ignore

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    while (paramNames.hasMoreElements()) {
      String paramName = (String) paramNames.nextElement();
      String paramValue = request.getParameter(paramName);
      properties.setProperty(paramName, paramValue);
    }
    Task task = Task.fromProperties(properties);
    String taskName = request.getHeader(TASK_NAME_REQUEST_HEADER);
    task.setName(taskName);
    return task;
  }

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com.google.appengine.tools.pipeline.impl.PipelineManager

com.google.appengine.tools.pipeline.impl.QueueSettings

com.google.appengine.tools.pipeline.impl.servlets.TaskHandler

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java.util.Properties

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