Package org.apache.flink.streaming.runtime.tasks

Class StreamOperatorWrapper<OUT,OP extends StreamOperator<OUT>>

java.lang.Object
org.apache.flink.streaming.runtime.tasks.StreamOperatorWrapper<OUT,OP>
@Internal public class StreamOperatorWrapper<OUT,OP extends StreamOperator<OUT>> extends Object
This class handles the finish, endInput and other related logic of a StreamOperator. It also automatically propagates the finish operation to the next wrapper that the next points to, so we can use next to link all operator wrappers in the operator chain and finish all operators only by calling the finish(StreamTaskActionExecutor, StopMode) method of the header operator wrapper.

  • Method Details

    • isClosed

      public boolean isClosed()
      Checks if the wrapped operator has been closed.

      Note that this method must be called in the task thread.

    • endOperatorInput

      public void endOperatorInput(int inputId) throws Exception
      Ends an input of the operator contained by this wrapper.
      Parameters:
      inputId - the input ID starts from 1 which indicates the first input.
      Throws:
      Exception

    • notifyCheckpointComplete

      public void notifyCheckpointComplete(long checkpointId) throws Exception
      Throws:
      Exception

    • notifyCheckpointSubsumed

      public void notifyCheckpointSubsumed(long checkpointId) throws Exception
      Throws:
      Exception

    • getStreamOperator

      public OP getStreamOperator()

    • finish

      public void finish(StreamTaskActionExecutor actionExecutor, StopMode stopMode) throws Exception
      Finishes the wrapped operator and propagates the finish operation to the next wrapper that the next points to.

      Note that this method must be called in the task thread, because we need to call MailboxExecutor.yield() to take the mails of closing operator and running timers and run them.

      Throws:
      Exception

    • close

      public void close() throws Exception
      Close the operator.
      Throws:
      Exception