List of leaseTasksByTagAsync() Examples

Examples of leaseTasksByTagAsync()

com.google.appengine.api.taskqueue.Queue.leaseTasksByTagAsync()
Asynchronously leases up to {@code countLimit} tasks from this queue for a period specified by{@code lease} and {@code unit}, having tag {@code tag}. If {@code tag} is {@code null}, tasks having the same tag as the task with earliest eta will be returned. If fewer such tasks than {@code countLimit} are available, all available such tasks in this {@link Queue} will bereturned. The available tasks are those in the queue having the earliest eta such that eta is prior to the time at which the lease is requested.
It is guaranteed that the leased tasks will be unavailable for lease to others in the lease period. You must call deleteTask to prevent the task from being leased again after the lease period. This method supports leasing a maximum of 1000 tasks for no more than one week. @param lease Number of {@code unit}s in the lease period @param unit Time unit of the lease period @param countLimit maximum number of tasks to lease @param tag User defined {@code String} tag required for returned tasks. If {@code null}, the tag of the task with earliest eta will be used. @return A {@code Future} whose result is a list of {@link TaskHandle} for each leased task. @throws IllegalArgumentException if lease < 0, countLimit <= 0 or either is too large.

Examples of com.google.appengine.api.taskqueue.Queue.leaseTasksByTagAsync()

    @Test
    public void testPullWithTag() throws Exception {
        final Queue queue = QueueFactory.getQueue("pull-queue");
        TaskHandle th = queue.add(withMethod(PULL).tag("barfoo1").etaMillis(15000));
        try {
            List<TaskHandle> handles = waitOnFuture(queue.leaseTasksByTagAsync(30, TimeUnit.MINUTES, 100, "barfoo1"));
            assertFalse(handles.isEmpty());
            TaskHandle lh = handles.get(0);
            assertEquals(th.getName(), lh.getName());
        } finally {
            queue.deleteTask(th);

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Examples of com.google.appengine.api.taskqueue.Queue.leaseTasksByTagAsync()

    public void testPullMultipleWithSameTag() throws Exception {
        final Queue queue = QueueFactory.getQueue("pull-queue");
        TaskHandle th1 = queue.add(withMethod(PULL).tag("barfoo2").payload("foobar").etaMillis(15000));
        TaskHandle th2 = queue.add(withMethod(PULL).tag("barfoo2").payload("foofoo").etaMillis(10000));
        try {
            List<TaskHandle> handles = waitOnFuture(queue.leaseTasksByTagAsync(30, TimeUnit.MINUTES, 100, "barfoo2"));
            assertEquals(2, handles.size());


            Set<String> expectedTasks = taskHandlesToNameSet(th1, th2);
            Set<String> returnedTasks = taskHandleListToNameSet(handles);
            assertEquals(expectedTasks, returnedTasks);

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Examples of com.google.appengine.api.taskqueue.Queue.leaseTasksByTagAsync()

        final Queue queue = QueueFactory.getQueue("pull-queue");
        TaskHandle th1 = queue.add(withMethod(PULL).tag("barfoo3").payload("foobar").etaMillis(15000));
        TaskHandle th2 = queue.add(withMethod(PULL).tag("qwerty").payload("foofoo").etaMillis(10000));
        TaskHandle th3 = queue.add(withMethod(PULL).tag("barfoo3").payload("foofoo").etaMillis(10000));
        try {
            List<TaskHandle> handles = waitOnFuture(queue.leaseTasksByTagAsync(30, TimeUnit.MINUTES, 100, "barfoo3"));
            assertEquals(2, handles.size());
            Set<String> expectedTasks = taskHandlesToNameSet(th1, th3);
            Set<String> returnedTasks = taskHandleListToNameSet(handles);
            assertEquals(expectedTasks, returnedTasks);

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