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JDBC Type 4 driver for MySQL.
There is a newer version: 9.1.0
/*
 * Copyright (c) 2015, 2024, Oracle and/or its affiliates.
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2.0, as published by
 * the Free Software Foundation.
 *
 * This program is designed to work with certain software that is licensed under separate terms, as designated in a particular file or component or in
 * included license documentation. The authors of MySQL hereby grant you an additional permission to link the program and your derivative works with the
 * separately licensed software that they have either included with the program or referenced in the documentation.
 *
 * Without limiting anything contained in the foregoing, this file, which is part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
 * version 1.0, a copy of which can be found at http://oss.oracle.com/licenses/universal-foss-exception.
 *
 * This program 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 2.0, for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

package com.mysql.cj.protocol.a;

import java.io.BufferedOutputStream;
import java.io.IOException;

import com.mysql.cj.protocol.MessageSender;

/**
 * Simple implementation of {@link MessageSender} which handles the transmission of logical MySQL packets to the provided output stream. Large packets will be
 * split into multiple chunks.
 */
public class SimplePacketSender implements MessageSender {

    private BufferedOutputStream outputStream;

    public SimplePacketSender(BufferedOutputStream outputStream) {
        this.outputStream = outputStream;
    }

    @Override
    public void send(byte[] packet, int packetLen, byte packetSequence) throws IOException {
        PacketSplitter packetSplitter = new PacketSplitter(packetLen);
        while (packetSplitter.nextPacket()) {
            this.outputStream.write(NativeUtils.encodeMysqlThreeByteInteger(packetSplitter.getPacketLen()));
            this.outputStream.write(packetSequence++);
            this.outputStream.write(packet, packetSplitter.getOffset(), packetSplitter.getPacketLen());
        }
        this.outputStream.flush();
    }

    @Override
    public MessageSender undecorateAll() {
        return this;
    }

    @Override
    public MessageSender undecorate() {
        return this;
    }

}