Module jdk.jfr
Package jdk.jfr

Interface FlightRecorderListener


public interface FlightRecorderListener
Callback interface to monitor Flight Recorder's life cycle.
Since:
9
  • Method Summary

    Modifier and Type Method Description
    default void recorderInitialized​(FlightRecorder recorder)
    Receives notification when Flight Recorder is initialized.
    default void recordingStateChanged​(Recording recording)
    Receives notification when the state of a recording changes.
  • Method Details

    • recorderInitialized

      default void recorderInitialized​(FlightRecorder recorder)
      Receives notification when Flight Recorder is initialized.

      This method is also be invoked when a listener is added to an already initialized Flight Recorder.

      This method allows clients to implement their own initialization mechanism that is executed before a FlightRecorder instance is returned by FlightRecorder.getFlightRecorder().

      Implementation Requirements:
      The default implementation of this method is empty.
      Implementation Note:
      This method should return as soon as possible, to avoid blocking initialization of Flight Recorder. To avoid deadlocks or unexpected behavior, this method should not call FlightRecorder.getFlightRecorder() or start new recordings.
      Parameters:
      recorder - Flight Recorder instance, not null
      See Also:
      FlightRecorder.addListener(FlightRecorderListener)
    • recordingStateChanged

      default void recordingStateChanged​(Recording recording)
      Receives notification when the state of a recording changes.

      Callback is invoked when a recording reaches the RUNNING, STOPPED and CLOSED state.

      Implementation Requirements:
      The default implementation of this method is empty.
      Implementation Note:
      The implementation of this method should return as soon as possible to avoid blocking normal operation of Flight Recorder.
      Parameters:
      recording - the recording where the state change occurred, not null
      See Also:
      FlightRecorder.addListener(FlightRecorderListener), RecordingState