JDK 17 jdk.jfr.jmod is the JMOD file for JDK 17 JFR module.

JDK 17 JFR module compiled class files are stored in \fyicenter\jdk-17.0.5\jmods\jdk.jfr.jmod.

JDK 17 JFR module compiled class files are also linked and stored in the \fyicenter\jdk-17.0.5\lib\modules JImage file.

JDK 17 JFR module source code files are stored in \fyicenter\jdk-17.0.5\lib\src.zip\jdk.jfr.

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

⏎ jdk/jfr/consumer/MetadataEvent.java

/*
 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */
package jdk.jfr.consumer;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import jdk.jfr.Configuration;
import jdk.jfr.EventType;

/**
 * Event that contains information about event types and configurations.
 *
 * @since 16
 */
public final class MetadataEvent {
    private final List<EventType> current;
    private final List<EventType> previous;
    private final List<Configuration> configurations;
    private List<EventType> added;
    private List<EventType> removed;

    /* package private */
    MetadataEvent(List<EventType> previous, List<EventType> current, List<Configuration> configs) {
        this.previous = previous;
        this.current = current;
        this.configurations = configs;
    }

    /**
     * Returns a list of the current event types being used.
     *
     * @return an immutable list of event types, not {@code null}
     */
    public final List<EventType> getEventTypes() {
        return Collections.unmodifiableList(current);
    }

    /**
     * Returns a list of added event types since the last metadata event.
     * <p>
     * The delta will be from the last metadata event. If no metadata event has been
     * emitted earlier, all known event types will be in the list.
     *
     * @return an immutable list of added event types, not {@code null}
     */
    public final List<EventType> getAddedEventTypes() {
        if (added == null) {
            calculateDelta();
        }
        return added;
    }

    /**
     * Returns a list of removed event types since the last metadata event.
     * <p>
     * The delta will be from the last metadata event. If no metadata event has been
     * emitted earlier, the list will be empty.
     *
     * @return an immutable list of added event types, not {@code null}
     */
    public final List<EventType> getRemovedEventTypes() {
        if (removed == null) {
            calculateDelta();
        }
        return removed;
    }

    /**
     * Returns a list of configurations.
     *
     * @return an immutable list of configurations, not {@code null}
     */
    public List<Configuration> getConfigurations() {
        return configurations;
    }

    private void calculateDelta() {
        List<EventType> added = new ArrayList<>();
        Map<Long, EventType> previousSet = new HashMap<>(previous.size());
        for (EventType eventType : previous) {
            previousSet.put(eventType.getId(), eventType);
        }
        for (EventType eventType : current) {
            EventType t = previousSet.remove(eventType.getId());
            if (t == null) {
                added.add(eventType);
            }
        }
        this.removed = List.copyOf(previousSet.values());
        this.added = List.copyOf(added);
    }
}

⏎ jdk/jfr/consumer/MetadataEvent.java

Or download all of them as a single archive file:

File name: jdk.jfr-17.0.5-src.zip
File size: 363343 bytes
Release date: 2022-09-13
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