Examples of com.sun.sgs.kernel.TaskQueue

com.sun.sgs.kernel.TaskQueue
This interface defines a dependency between tasks, such that tasks are run in the order in which they are submitted, and the next task isn't started until the current task has completed.

            identity = defaultTaskOwner;
        }


        // TODO this implementation will not work in multinode
        synchronized(taskQueues) {
            TaskQueue queue = taskQueues.get(queueOwner);
            if (queue==null) {
                queue = transactionScheduler.createTaskQueue();
                taskQueues.put(queueOwner, queue);
            }
            queue.addTask(task, identity);
        }
    }

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        logger.log(Level.FINEST, "serviceEventQueue sessionId:{0}",
             HexDumper.toHexString(sessionId));
    }


    BigInteger sessionRefId = new BigInteger(1, sessionId);
    TaskQueue taskQueue = sessionTaskQueues.get(sessionRefId);
    if (taskQueue == null) {
        TaskQueue newTaskQueue =
      transactionScheduler.createTaskQueue();
        taskQueue = sessionTaskQueues.
      putIfAbsent(sessionRefId, newTaskQueue);
        if (taskQueue == null) {
      taskQueue = newTaskQueue;

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    private void flushTasks(
  BigInteger channelRefId, List<KernelRunnable> taskList)
  
    {
        assert Thread.holdsLock(contextList);
  TaskQueue taskQueue = channelTaskQueues.get(channelRefId);
  if (taskQueue == null) {
      taskQueue = taskScheduler.createTaskQueue();
      channelTaskQueues.put(channelRefId, taskQueue);
  }
  for (KernelRunnable task : taskList) {
      taskQueue.addTask(task, taskOwner);
  }
    }

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        logger.log(
      Level.FINEST, "serviceEventQueue channelId:{0}",
      HexDumper.toHexString(channelRefId.toByteArray()));
    }


    TaskQueue taskQueue = coordinatorTaskQueues.get(channelRefId);
    if (taskQueue == null) {
        TaskQueue newTaskQueue =
      transactionScheduler.createTaskQueue();
        taskQueue = coordinatorTaskQueues.
      putIfAbsent(channelRefId, newTaskQueue);
        if (taskQueue == null) {
      taskQueue = newTaskQueue;

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    /**
     * Test createTaskQueue.
     */


    @Test public void scheduleQueuedTasks() throws Exception {
        TaskQueue queue = txnScheduler.createTaskQueue();
        AtomicInteger runCount = new AtomicInteger(0);
        for (int i = 0; i < 10; i++)
            queue.addTask(new DependentTask(runCount), taskOwner);
        Thread.sleep(500L);
        assertEquals(10, runCount.get());
    }

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        assertEquals(10, runCount.get());
    }


    @Test (expected=NullPointerException.class)
        public void scheduleQueuedTasksNull() throws Exception {
        TaskQueue queue = txnScheduler.createTaskQueue();
        queue.addTask(null, taskOwner);
    }

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        queue.addTask(null, taskOwner);
    }


    @Test (expected=NullPointerException.class)
        public void scheduleQueuedTasksOwnerNull() throws Exception {
        TaskQueue queue = txnScheduler.createTaskQueue();
        queue.addTask(new DependentTask(null), null);
    }

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      // The session is not local or is disconnected, so this node
      // should not service the event queue.
      return;
  }


  TaskQueue taskQueue = sessionTaskQueues.get(sessionRefId);
  if (taskQueue == null) {
      TaskQueue newTaskQueue =
    transactionScheduler.createTaskQueue();
      taskQueue = sessionTaskQueues.
    putIfAbsent(sessionRefId, newTaskQueue);
      if (taskQueue == null) {
    taskQueue = newTaskQueue;

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    /**
     * Test createTaskQueue.
     */


    @Test public void scheduleQueuedTasks() throws Exception {
        TaskQueue queue = taskScheduler.createTaskQueue();
        AtomicInteger runCount = new AtomicInteger(0);
        for (int i = 0; i < 10; i++)
            queue.addTask(new DependentTask(runCount), taskOwner);
        Thread.sleep(500L);
        assertEquals(10, runCount.get());
    }

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        assertEquals(10, runCount.get());
    }


    @Test (expected=NullPointerException.class)
        public void scheduleQueuedTasksNull() throws Exception {
        TaskQueue queue = taskScheduler.createTaskQueue();
        queue.addTask(null, taskOwner);
    }

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