Examples of com.google.appengine.api.taskqueue.Queue

Package com.google.appengine.api.taskqueue

Examples of com.google.appengine.api.taskqueue.Queue

com.google.appengine.api.taskqueue.Queue
{@link Queue} is used to manage a task queue.
Implementations of this interface must be threadsafe.
Queues are transactional. If a datastore transaction is in progress when {@link #add()} or {@link #add(TaskOptions)} is invoked, the task will onlybe added to the queue if the datastore transaction successfully commits. If you want to add a task to a queue and have that operation succeed or fail independently of an existing datastore transaction you can invoke {@link #add(Transaction,TaskOptions)} with a {@code null} transactionargument. Note that while the addition of the task to the queue can participate in an existing transaction, the execution of the task cannot participate in this transaction. In other words, when the transaction commits you are guaranteed that your task will be added and run, not that your task executed successfully.
Queues may be configured in either push or pull mode, but they share the same interface. However, only tasks with {@link TaskOptions.Method#PULL} maybe added to pull queues. The tasks in push queues must be added with one of the other available methods.
Pull mode queues do not automatically deliver tasks to the application. The application is required to call {@link #leaseTasks(long,TimeUnit,long) leaseTasks} to acquire a lease onthe task and process them explicitly. Attempting to call {@link #leaseTasks(long,TimeUnit,long) leaseTasks} on a push queue causesa {@link InvalidQueueModeException} to be thrown. When the task processinghas finished processing a task that is leased, it should call {@link #deleteTask(String)}. If deleteTask is not called before the lease expires, the task will again be available for lease.
Queue mode can be switched between push and pull. When switching from push to pull, tasks will stay in the task queue and are available for lease, but url and headers information will be ignored when returning the tasks. When switching from pull to push, existing tasks will remain in the queue but will fail on auto-execution because they lack a url. If the queue mode is once again changed to pull, these tasks will eventually be available for lease.

        if (globalTransactionKey == null) {
            throw new NullPointerException(
                "The globalTransactionKey parameter must not be null.");
        }
        String encodedKey = KeyFactory.keyToString(globalTransactionKey);
        Queue queue = QueueFactory.getQueue(QUEUE_NAME);
        queue.add(tx, TaskOptions.Builder.withUrl(
            GlobalTransactionServlet.SERVLET_PATH).param(
            GlobalTransactionServlet.COMMAND_NAME,
            GlobalTransactionServlet.ROLLFORWARD_COMMAND).param(
            GlobalTransactionServlet.KEY_NAME,
            encodedKey).countdownMillis(countdownMillis));

View Full Code Here

        if (globalTransactionKey == null) {
            throw new NullPointerException(
                "The globalTransactionKey parameter must not be null.");
        }
        String encodedKey = KeyFactory.keyToString(globalTransactionKey);
        Queue queue = QueueFactory.getQueue(QUEUE_NAME);
        queue.add(null, TaskOptions.Builder.withUrl(
            GlobalTransactionServlet.SERVLET_PATH).param(
            GlobalTransactionServlet.COMMAND_NAME,
            GlobalTransactionServlet.ROLLBACK_COMMAND).param(
            GlobalTransactionServlet.KEY_NAME,
            encodedKey));

View Full Code Here

                      HttpServletResponse resp)
        throws IOException {
        resp.setContentType("text/html");
        PrintWriter out = resp.getWriter();


        Queue queue = QueueFactory.getDefaultQueue();
        queue.add();
        queue.add();
        queue.add();
        out.println("<p>Enqueued 3 tasks to the default queue.</p>");


        TaskOptions taskOptions =
            TaskOptions.Builder.withUrl("/send_invitation_task")
            .param("address", "juliet@example.com")
            .param("firstname", "Juliet");
        queue.add(taskOptions);
        out.println("<p>Enqueued 1 task to the default queue with parameters.</p>");


        SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSSSSS");
        fmt.setTimeZone(new SimpleTimeZone(0, ""));
        out.println("<p>The time is: " + fmt.format(new Date()) + "</p>");

View Full Code Here

        // would necessitate a retry here. Right now we won't retry if we get null back.
        if (uploadUrl != null) {
          photoEntry.setResumableUploadUrl(uploadUrl);
          photoSubmissionDao.save(photoEntry);


          Queue queue = QueueFactory.getDefaultQueue();
          String namespace = NamespaceManager.get();
          if (namespace == null) {
            namespace = "";
          }
          queue.add(withUrl("/tasks/PicasaUpload").method(Method.POST)
            .param("id", photoEntry.getId()).param("ns", namespace)
            .countdownMillis(TASK_DELAY));
        }
      }
    } catch (IllegalArgumentException e) {

View Full Code Here

        notification.owner = receiver;
        notification.type = Notification.NotificationType.INBOX;
        notification.insert();
        
        // Creating a task for send an email with the notification.
        Queue queue = QueueFactory.getDefaultQueue();
        String residenceDomain = null;
        String username = Session.current().get(SessionConstants.USER);
        if(username.contains("@")){
          residenceDomain = username.substring(username.indexOf("@")+1);
        } else {
          residenceDomain = "";
        }
        
          queue.add(withUrl("/task/notificate/mail").method(Method.POST).
              param("fromId", String.valueOf(from.id)).
              param("dstId", String.valueOf(receiver.id)).
              param("msgContent", message.text).
              param("numberAttach", String.valueOf(sharedContents.size())).
              param("residenceDomain", residenceDomain));

View Full Code Here

public class NewAccess implements ITaskAccess{


  private final static String CONN_URL = "/appwrench/queuehandler";
  
  public void addTaskToQueue(Map<String, String> params){
    Queue tq = QueueFactory.getQueue("onPositiveQueue");
    TaskOptions to = TaskOptions.Builder.withUrl(CONN_URL);
    for (String k : params.keySet()) {
      String val = params.get(k);
      to = to.param(k, val);
    }
    to = to.method(Method.POST);
    // to = to.taskName("task" + INIT + "count" + (-1));
    tq.add(to);
  }

View Full Code Here

        if (globalTransactionKey == null) {
            throw new NullPointerException(
                "The globalTransactionKey parameter must not be null.");
        }
        String encodedKey = KeyFactory.keyToString(globalTransactionKey);
        Queue queue = QueueFactory.getQueue(QUEUE_NAME);
        queue.add(tx, TaskOptions.Builder.withUrl(
            GlobalTransactionServlet.SERVLET_PATH).param(
            GlobalTransactionServlet.COMMAND_NAME,
            GlobalTransactionServlet.ROLLFORWARD_COMMAND).param(
            GlobalTransactionServlet.KEY_NAME,
            encodedKey).countdownMillis(countdownMillis));

View Full Code Here

        if (globalTransactionKey == null) {
            throw new NullPointerException(
                "The globalTransactionKey parameter must not be null.");
        }
        String encodedKey = KeyFactory.keyToString(globalTransactionKey);
        Queue queue = QueueFactory.getQueue(QUEUE_NAME);
        queue.add(null, TaskOptions.Builder.withUrl(
            GlobalTransactionServlet.SERVLET_PATH).param(
            GlobalTransactionServlet.COMMAND_NAME,
            GlobalTransactionServlet.ROLLBACK_COMMAND).param(
            GlobalTransactionServlet.KEY_NAME,
            encodedKey));

View Full Code Here

     * @throws Exception
     * 
     */
    @Test
    public void taskQueueForDefaultQueue() throws Exception {
        Queue queue = QueueFactory.getDefaultQueue();
        queue
            .add(TaskOptions.Builder.withUrl("/tqHandler").param("key", "aaa"));
        assertThat(tester.tasks.size(), is(1));
        TaskQueueAddRequest task = tester.tasks.get(0);
        assertThat(task.getUrl(), is("/tqHandler"));
        assertThat(task.getBody(), is("key=aaa"));

View Full Code Here

     * @throws Exception
     * 
     */
    @Test
    public void taskQueueForNamedQueue() throws Exception {
        Queue queue = QueueFactory.getQueue("test-queue");
        queue
            .add(TaskOptions.Builder.withUrl("/tqHandler").param("key", "aaa"));
        assertThat(tester.tasks.size(), is(1));
        TaskQueueAddRequest task = tester.tasks.get(0);
        assertThat(task.getUrl(), is("/tqHandler"));
        assertThat(task.getBody(), is("key=aaa"));

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of com.google.appengine.api.taskqueue.Queue

com.almende.eve.scheduler.google.GaeSchedulerFactory$AppEngineScheduler

com.apps.ubc.cc.QueueSpider

com.appspot.plucial.controller.account.ajax.GetNewActivitysController

com.appspot.plucial.controller.task.ActivitysBotController

com.appspot.plucial.controller.task.ActivitysBotTaskController

com.appspot.plucial.controller.task.AllActivitysBotController

com.appspot.plucial.controller.user.ajax.ReportActivityController

com.arcbees.appengine.mail.Mail

com.asual.summer.sample.websocket.Clock

com.fms.kccc.controller.SendAllMessagesServlet

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.