src/java.base/share/classes/sun/nio/ch/SocketOutputStream.java - master - githubmirror/panama-vector

src/java.base/share/classes/sun/nio/ch/SocketOutputStream.java

77 строк2 KB

Robert Toyonaga

8331996: JFR: Add boolean check before loading event classes

10 авг 2026, 16:22

10 авг 2026, 16:22edc9c7f

/*
 * Copyright (c) 2022, 2026, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package sun.nio.ch;

import jdk.internal.event.SocketWriteEvent;

import java.io.IOException;
import java.io.OutputStream;

/**
 * An OutputStream that writes bytes to a socket channel.
 */
class SocketOutputStream extends OutputStream {
    // Flag set by jdk.internal.event.JFRTracing to indicate if
    // socket writes should be traced by JFR.
    private static boolean jfrTracing;

    private final SocketChannelImpl sc;

    /**
     * Initialize a SocketOutputStream that writes to the given socket channel.
     */
    SocketOutputStream(SocketChannelImpl sc) {
        this.sc = sc;
    }

    /**
     * Returns the socket channel.
     */
    SocketChannelImpl channel() {
        return sc;
    }

    @Override
    public void write(int b) throws IOException {
        byte[] a = new byte[]{(byte) b};
        write(a, 0, 1);
    }

    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        if (jfrTracing && SocketWriteEvent.enabled()) {
            long start = SocketWriteEvent.timestamp();
            sc.blockingWriteFully(b, off, len);
            SocketWriteEvent.offer(start, len, sc.remoteAddress());
            return;
        }
        sc.blockingWriteFully(b, off, len);
    }

    @Override
    public void close() throws IOException {
        sc.close();
    }
}