Examples of com.sun.sgs.service.TaskService

com.sun.sgs.service.TaskService
This Service provides facilities for scheduling tasks to run after the current task completes. The methods inherited from TaskManager schedule durable, transactional tasks. The scheduleNonDurableTask methods defined here are used to schedule tasks that are not persisted by the TaskService but optionally invoked in a transactional context.
By default all tasks scheduled will be owned by the calling task's owning identity. To create a new owning identity for a task use the RunWithNewIdentity annotation as described in the docs for TaskManager. @see TaskManager

    return;
      }


      WatchdogService watchdogService =
    ChannelServiceImpl.getWatchdogService();
      TaskService taskService = ChannelServiceImpl.getTaskService();
      BigInteger channelRefId = new BigInteger(channelIter.next());
      channelIter.remove();
      ChannelImpl channel = (ChannelImpl) getObjectForId(channelRefId);
      if (channel != null) {
    channel.reassignCoordinator(failedNodeId);
    
    /*
     * If other channel servers have failed, remove their sessions
     * from the channel too.  This covers the case where a channel
     * coordinator (informed of a node failure) fails before it has
     * a chance to schedule a task to remove member sessions for
     * another failed node (cascading failure during recovery).
     */
    for (long serverNodeId : channel.getMemberNodeIds()) {
        Node serverNode = watchdogService.getNode(serverNodeId);
        if (serverNode == null || !serverNode.isAlive()) {
      channel.removeSessionSet(serverNodeId);
        }
    }
      }


      /*
       * Schedule a task to reassign the next channel coordinator, or
       * if done with coordinator reassignment, remove the recovered
       * node's  mapping from the node-to-event-queues map.
       */
      if (channelIter.hasNext()) {
    taskService.scheduleTask(this);
      }
  }

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      if (iter == null || !iter.hasNext()) {
    return;
      }
      
      BigInteger channelRefId = new BigInteger(iter.next());
      TaskService taskService = ChannelServiceImpl.getTaskService();
      taskService.scheduleTask(
    new RemoveFailedSessionsFromChannelTask(
        failedNodeId, channelRefId));
        
      // Schedule a task to remove failed sessions from next
      // locally coordinated channel.
      if (iter.hasNext()) {
    taskService.scheduleTask(this);
      }
  }

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  public void run() {
      DataService dataService =
    ClientSessionServiceImpl.getDataService();
      String key = dataService.nextServiceBoundName(lastKey);
      if (key != null && key.startsWith(nodePrefix)) {
    TaskService taskService =
        ClientSessionServiceImpl.getTaskService();
    taskService.scheduleTask(
        new CleanupDisconnectedSessionTask(key));
    lastKey = key;
    taskService.scheduleTask(this);
      }
  }

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  implements RecoveryListener
    {
  /** {@inheritDoc} */
  public void recover(final Node node, RecoveryCompleteFuture future) {
      final long nodeId = node.getId();
      final TaskService taskService = getTaskService();
      
      try {
    if (logger.isLoggable(Level.INFO)) {
        logger.log(Level.INFO, "Node:{0} recovering for node:{1}",
             localNodeId, nodeId);
    }


    /*
     * Schedule persistent tasks to perform recovery.
     */
    transactionScheduler.runTask(
        new AbstractKernelRunnable("ScheduleRecoveryTasks") {
      public void run() {
          /*
           * For each session on the failed node, notify
           * the session's ClientSessionListener and
           * clean up the session's persistent data and
           * bindings. 
           */
          taskService.scheduleTask(
        new HandleNextDisconnectedSessionTask(nodeId));
        
          /*
           * Remove client session server proxy and
           * associated binding for failed node, as
           * well as protocol descriptors for the
           * failed node.
           */
          taskService.scheduleTask(
        new RemoveNodeSpecificDataTask(nodeId));
      } },
        taskOwner);
               
    future.done();

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  implements RecoveryListener
    {
  /** {@inheritDoc} */
  public void recover(Node node, RecoveryCompleteFuture future) {
      final long nodeId = node.getId();
      final TaskService taskService = getTaskService();
      try {
    if (logger.isLoggable(Level.INFO)) {
        logger.log(Level.INFO, "Node:{0} recovering for node:{1}",
             localNodeId, nodeId);
    }


    /*
     * Schedule persistent tasks to perform recovery.
     */
    transactionScheduler.runTask(
        new AbstractKernelRunnable("ScheduleRecoveryTasks") {
      public void run() {
          /*
           * Reassign each failed coordinator to a new node.
           */
          taskService.scheduleTask(
        new ChannelImpl.ReassignCoordinatorsTask(
            nodeId));
          /*
           * Remove binding to channel server proxy for
           * failed node, and remove proxy's wrapper.
           */
          taskService.scheduleTask(
        new RemoveChannelServerProxyTask(nodeId));
      }
        },
        taskOwner);

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  /** {@inheritDoc} */
  public void nodeFailed(Node node) {
      final long nodeId = node.getId();
      channelServerCache.remove(nodeId);
      final TaskService taskService = getTaskService();
      try {
    if (logger.isLoggable(Level.INFO)) {
        logger.log(Level.INFO,
             "Node:{0} handling nodeFailed:{1}",
             localNodeId, nodeId);
    }


    /*
     * Schedule persistent task to remove the failed sessions of
     * locally coordinated channels.
     */
    transactionScheduler.runTask(
        new AbstractKernelRunnable(
      "ScheduleRemoveFailedSessionsFromLocalChannelsTask")
        {
      public void run() {
          taskService.scheduleTask(
        new ChannelImpl.
            RemoveFailedSessionsFromLocalChannelsTask(
          localNodeId, nodeId));
      }
        }, taskOwner);

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      DataService dataService =
    ClientSessionServiceImpl.getInstance().getDataService();
      // TBD: this could use a BindingKeyedMap.
      String key = dataService.nextServiceBoundName(lastKey);
      if (key != null && key.startsWith(nodePrefix)) {
    TaskService taskService =
        ClientSessionServiceImpl.getTaskService();
    taskService.scheduleTask(
        new CleanupDisconnectedSessionTask(key));
    lastKey = key;
    taskService.scheduleTask(this);
      }
  }

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    }
      }
  }


  private void scheduleTask() {
      TaskService taskService = 
    ChannelServiceImpl.getTaskService();
      if (isDurable) {
    taskService.scheduleTask(this, 1000L);
      } else {
    taskService.scheduleNonDurableTask(this, 1000L, true);
      }
  }

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    return;
      }


      WatchdogService watchdogService =
    ChannelServiceImpl.getWatchdogService();
      TaskService taskService = ChannelServiceImpl.getTaskService();
      BigInteger channelRefId = new BigInteger(channelIter.next());
      channelIter.remove();
      ChannelImpl channel = (ChannelImpl) getObjectForId(channelRefId);
      if (channel != null) {
    channel.reassignCoordinator(failedNodeId);
    
    /*
     * If other channel servers have failed, remove the failed
     * server node ID from the channel too.  This covers the
     * case where a channel coordinator (informed of a node
     * failure) fails before it has a chance to schedule a task
     * to remove the server node ID for another failed node
     * (cascading failure during recovery).
     */
    for (long serverNodeId : channel.getServerNodeIds()) {
        Node serverNode = watchdogService.getNode(serverNodeId);
        if (serverNode == null || !serverNode.isAlive()) {
      channel.removeServerNodeId(serverNodeId);
        }
    }
      }


      /*
       * Schedule a task to reassign the next channel coordinator, or
       * if done with coordinator reassignment, remove the recovered
       * node's  mapping from the node-to-event-queues map.
       */
      if (channelIter.hasNext()) {
    taskService.scheduleTask(this);
      }
  }

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  implements RecoveryListener
    {
  /** {@inheritDoc} */
  public void recover(final Node node, SimpleCompletionHandler handler) {
      final long nodeId = node.getId();
      final TaskService taskService = getTaskService();
      
      try {
    if (logger.isLoggable(Level.INFO)) {
        logger.log(Level.INFO, "Node:{0} recovering for node:{1}",
             localNodeId, nodeId);
    }


    /*
     * Schedule persistent tasks to perform recovery.
     */
    transactionScheduler.runTask(
        new AbstractKernelRunnable("ScheduleRecoveryTasks") {
      public void run() {
          /*
           * For each session on the failed node, notify
           * the session's ClientSessionListener and
           * clean up the session's persistent data and
           * bindings. 
           */
          taskService.scheduleTask(
        new HandleNextDisconnectedSessionTask(nodeId));
        
          /*
           * Remove client session server proxy and
           * associated binding for failed node, as
           * well as protocol descriptors for the
           * failed node.
           */
          taskService.scheduleTask(
        new RemoveNodeSpecificDataTask(nodeId));
      } },
        taskOwner);
               
    handler.completed();

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Related Classes of com.sun.sgs.service.TaskService

com.sun.sgs.impl.service.channel.ChannelImpl$ReassignCoordinatorsTask

com.sun.sgs.impl.service.channel.ChannelImpl$RemoveFailedSessionsFromLocalChannelsTask

com.sun.sgs.impl.service.channel.ChannelImpl$SavedMessageReaper

com.sun.sgs.impl.service.channel.ChannelServiceImpl$ChannelServiceNodeListener

com.sun.sgs.impl.service.channel.ChannelServiceImpl$ChannelServiceRecoveryListener

com.sun.sgs.impl.service.session.ClientSessionImpl$HandleNextDisconnectedSessionTask

com.sun.sgs.impl.service.session.ClientSessionServiceImpl$ClientSessionServiceRecoveryListener

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