JDK 11 jdk.jfr.jmod is the JMOD file for JDK 11 JFR module.

JDK 11 JFR module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.jfr.jmod.

JDK 11 JFR module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 JFR module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.jfr.

You can click and view the content of each source code file in the list below.

⏎ jdk/jfr/FlightRecorderListener.java

/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package jdk.jfr;


/**
 * Callback interface to monitor Flight Recorder's life cycle.
 *
 * @since 9
 */
public interface FlightRecorderListener {

    /**
     * Receives notification when Flight Recorder is initialized.
     * <p>
     * This method is also be invoked when a listener is added to an already
     * initialized Flight Recorder.
     * <p>
     * This method allows clients to implement their own initialization mechanism
     * that is executed before a {@code FlightRecorder} instance is returned by
     * {@code FlightRecorder#getFlightRecorder()}.
     *
     * @implNote 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
     *           {@link FlightRecorder#getFlightRecorder()} or start new recordings.
     *
     * @implSpec The default implementation of this method is empty.
     *
     * @param recorder Flight Recorder instance, not {@code null}
     *
     * @see FlightRecorder#addListener(FlightRecorderListener)
     */
    default void recorderInitialized(FlightRecorder recorder) {
    }

    /**
     * Receives notification when the state of a recording changes.
     * <p>
     * Callback is invoked when a recording reaches the {@code RUNNING},
     * {@code STOPPED} and {@code CLOSED} state.
     *
     * @implNote The implementation of this method should return as soon as possible
     *           to avoid blocking normal operation of Flight Recorder.
     *
     * @implSpec The default implementation of this method is empty.
     *
     * @param recording the recording where the state change occurred, not
     *        {@code null}
     *
     * @see FlightRecorder#addListener(FlightRecorderListener)
     * @see RecordingState
     *
     */
    default void recordingStateChanged(Recording recording) {
    }
}

⏎ jdk/jfr/FlightRecorderListener.java

Or download all of them as a single archive file:

File name: jdk.jfr-11.0.1-src.zip
File size: 237632 bytes
Release date: 2018-11-04
Download 

⇒ JDK 11 jdk.jlink.jmod - JLink Tool

⇐ JDK 11 jdk.jdwp.agent.jmod - JDWP Agent Module

⇑ Download and Use JDK 11

⇑⇑ FAQ for JDK (Java Development Kit)