/*

 * Copyright (c) 2013, 2018, 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

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 */

package jdk.jfr.internal.instrument;

import java.io.IOException;

import java.net.InetAddress;

import jdk.jfr.events.SocketReadEvent;

/**

 * See {@link JITracer} for an explanation of this code.

 */

@JIInstrumentationTarget("java.net.SocketInputStream")

@JITypeMapping(from = "jdk.jfr.internal.instrument.SocketInputStreamInstrumentor$AbstractPlainSocketImpl",

            to = "java.net.AbstractPlainSocketImpl")

final class SocketInputStreamInstrumentor {

    private SocketInputStreamInstrumentor() {

    }

    @SuppressWarnings("deprecation")

    @JIInstrumentationMethod

    int read(byte b[], int off, int length, int timeout) throws IOException {

        SocketReadEvent event = SocketReadEvent.EVENT.get();

        if (!event.isEnabled()) {

            return read(b, off, length, timeout);

        }

        int bytesRead = 0;

        try {

            event.begin();

            bytesRead = read(b, off, length, timeout);

        } finally {

            event.end();

            if (event.shouldCommit()) {

                String hostString  = impl.address.toString();

                int delimiterIndex = hostString.lastIndexOf('/');

                event.host      = hostString.substring(0, delimiterIndex);

                event.address   = hostString.substring(delimiterIndex + 1);

                event.port      = impl.port;

                if (bytesRead < 0) {

                    event.endOfStream = true;

                } else {

                    event.bytesRead = bytesRead;

                }

                event.timeout   = timeout;

                event.commit();

                event.reset();

            }

        }

        return bytesRead;

    }

    private AbstractPlainSocketImpl impl = null;

    void silenceFindBugsUnwrittenField(InetAddress dummy) {

        impl.address = dummy;

    }

    static class AbstractPlainSocketImpl {

        InetAddress address;

        int port;

    }

}