Package io.trino.execution

Interface RemoteTask

All Known Implementing Classes:
HttpRemoteTask
public interface RemoteTask

  • Method Details

    • getTaskId

      TaskId getTaskId()

    • getNodeId

      String getNodeId()

    • getTaskInfo

      TaskInfo getTaskInfo()

    • getTaskStatus

      TaskStatus getTaskStatus()

    • start

      void start()

    • addSplits

      void addSplits(com.google.common.collect.Multimap<PlanNodeId,Split> splits)

    • noMoreSplits

      void noMoreSplits(PlanNodeId sourceId)

    • setOutputBuffers

      void setOutputBuffers(OutputBuffers outputBuffers)

    • setSpeculative

      void setSpeculative(boolean speculative)

    • addStateChangeListener

      void addStateChangeListener(StateMachine.StateChangeListener<TaskStatus> stateChangeListener)
      Listener is always notified asynchronously using a dedicated notification thread pool so, care should be taken to avoid leaking this when adding a listener in a constructor. Additionally, it is possible notifications are observed out of order due to the asynchronous execution.

    • addFinalTaskInfoListener

      void addFinalTaskInfoListener(StateMachine.StateChangeListener<TaskInfo> stateChangeListener)
      Add a listener for the final task info. This notification is guaranteed to be fired only once. Listener is always notified asynchronously using a dedicated notification thread pool so, care should be taken to avoid leaking this when adding a listener in a constructor. Additionally, it is possible notifications are observed out of order due to the asynchronous execution.

    • whenSplitQueueHasSpace

      com.google.common.util.concurrent.ListenableFuture<Void> whenSplitQueueHasSpace(long weightThreshold)

    • cancel

      void cancel()

    • abort

      void abort()

    • getPartitionedSplitsInfo

      PartitionedSplitsInfo getPartitionedSplitsInfo()

    • failLocallyImmediately

      void failLocallyImmediately(Throwable cause)
      Fails task from the coordinator perspective immediately, without waiting for acknowledgement from the remote task

    • failRemotely

      void failRemotely(Throwable cause)
      Fails task remotely; only transitions to failed state when we receive confirmation that remote operation is completed

    • getQueuedPartitionedSplitsInfo

      PartitionedSplitsInfo getQueuedPartitionedSplitsInfo()

    • getUnacknowledgedPartitionedSplitCount

      int getUnacknowledgedPartitionedSplitCount()

    • retrieveAndDropSpoolingOutputStats

      SpoolingOutputStats.Snapshot retrieveAndDropSpoolingOutputStats()
      Retrieves spooling output stats. Stats are available only for tasks that are in the TaskState.FINISHED state and have received the final task info (see addFinalTaskInfoListener(StateChangeListener). Stats can be retrieved only once and are discarded upon retrieval. Subsequent calls to the method after initial retrieval will fail.

      The retrieve-and-drop semantics is necessary to avoid unnecessary memory overhead of keeping the SpoolingOutputStats.Snapshot for every task as usually only the total output of the entire stage is of interest.

      Returns:
      spooling output statistics