Package org.apache.flink.runtime.operators.coordination

Interface OperatorCoordinator.SubtaskGateway

Enclosing interface:
OperatorCoordinator
public static interface OperatorCoordinator.SubtaskGateway
The SubtaskGateway is the way to interact with a specific parallel instance of the Operator (an Operator subtask), like sending events to the operator.

  • Method Summary

    Modifier and Type
    Method
    Description
    ExecutionAttemptID
    getExecution()
    Gets the execution attempt for the subtask execution attempt that this gateway communicates with.
    int
    getSubtask()
    Gets the subtask index of the parallel operator instance this gateway communicates with.
    CompletableFuture<Acknowledge>
    sendEvent(OperatorEvent evt)
    Sends an event to the parallel subtask with the given subtask index.

  • Method Details

    • sendEvent

      CompletableFuture<Acknowledge> sendEvent(OperatorEvent evt)
      Sends an event to the parallel subtask with the given subtask index.

      The returned future is completed successfully once the event has been received by the target TaskManager. The future is completed exceptionally if the event cannot be sent. That includes situations where the target task is not running.

    • getExecution

      ExecutionAttemptID getExecution()
      Gets the execution attempt for the subtask execution attempt that this gateway communicates with.

    • getSubtask

      int getSubtask()
      Gets the subtask index of the parallel operator instance this gateway communicates with.