Examples of com.sun.sgs.kernel.TaskReservation

com.sun.sgs.kernel.TaskReservation
This interface manages task reservations. Reservations are used to guarantee space in a scheduler for tasks. Once a reservation is acquired, the associated tasks will always have space to run. Acquiring a reservation does not actually schedule the tasks, so until use is called, the tasks will never run. The reservation may be cancelled if it has not yet been run, and no cost will be charged to the owner.
If this reservation includes tasks scheduled to be run at a specified time, and that time has already passed when use is called, then the tasks are run immediately.

    }


    @Test (expected=IllegalStateException.class)
        public void useAfterCancelReservedTaskDelayed() throws Exception {
        SchedulerQueue queue = getQueueInstance();
        TaskReservation reservation =
            queue.reserveTask(new ScheduledTaskImpl(testTask, 100));
        reservation.cancel();
        reservation.use();
    }

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    }


    @Test (timeout=300)
        public void reserveAndConsumeTasks() throws Exception {
        SchedulerQueue queue = getQueueInstance();
        TaskReservation reservation =queue.reserveTask(new ScheduledTaskImpl());
        reservation.use();
        reservation = queue.reserveTask(new ScheduledTaskImpl());
        reservation.cancel();
        reservation = queue.reserveTask(new ScheduledTaskImpl(100));
        reservation.use();
        reservation = queue.reserveTask(new ScheduledTaskImpl(120));
        reservation.cancel();
        reservation = queue.reserveTask(new ScheduledTaskImpl(140));
        reservation.use();
        assertNotNull(queue.getNextTask(false));
        assertNull(queue.getNextTask(false));
        assertNotNull(queue.getNextTask(true));
        assertNotNull(queue.getNextTask(true));
        assertNull(queue.getNextTask(false));

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                               "newNode: {1}}", 
                               id, newNode);
                    for (NodeMappingListener listener : 
                         nodeChangeListeners) 
                    {     
                        TaskReservation res =
                            taskScheduler.reserveTask(
                                new MapRemoveTask(listener, id, newNode),
                                taskOwner);
                        pendingNotifications.add(res);
                    }

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                               "identity: {0}, " + "oldNode: {1}}", 
                               id, oldNode);
                    for (NodeMappingListener listener : 
                         nodeChangeListeners) 
                    {
                        TaskReservation res =
                            taskScheduler.reserveTask(
                                new MapAddTask(listener, id, oldNode),
                                taskOwner);
                        pendingNotifications.add(res);
                    }

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                         idRelocationListeners) 
                    {
                        final SimpleCompletionHandler handler =
                            new PrepareMoveCompletionHandler(id);
                        handlerQueue.add(handler);
                        TaskReservation res =
                            taskScheduler.reserveTask(
                                new MapRelocateTask(listener, id, newNodeId,
                                                    handler),
                                taskOwner);
                        pendingNotifications.add(res);

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        }


        // reserve a space for this task
        try {
            TxnState txnState = ctxFactory.joinTransaction();
            TaskReservation res = null;
            // see if this should be scheduled as a task to run now, or as
            // a task to run after a delay, and which scheduler to use
            if (appStartTime == START_NOW) {
                if (transactional) {
                    res = transactionScheduler.reserveTask(task, owner);

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Related Classes of com.sun.sgs.kernel.TaskReservation

com.sun.sgs.impl.kernel.schedule.TestSchedulerQueueImpl

com.sun.sgs.impl.service.nodemap.NodeMappingServiceImpl$MapChangeNotifier

com.sun.sgs.impl.service.task.TaskServiceImpl

com.sun.sgs.test.impl.kernel.TestTaskSchedulerImpl

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