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Encrypted, high-performance, and event-driven/reactive network stack for Java 11+

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/**
 * Copyright (C) 2009-2013 Barchart, Inc. 
 * 
 * All rights reserved. Licensed under the OSI BSD License.
 * 
 * http://www.opensource.org/licenses/bsd-license.php
 */
package com.barchart.udt.net;

import com.barchart.udt.ErrorUDT;
import com.barchart.udt.SocketUDT;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.channels.IllegalBlockingModeException;

/**
 * {@link OutputStream} for UDT sockets.
 */
public
class NetOutputStreamUDT extends OutputStream {

    protected final SocketUDT socketUDT;

    /**
     * @param socketUDT The UDT socket.
     */
    public
    NetOutputStreamUDT(final SocketUDT socketUDT) {

        if (!socketUDT.isBlocking()) {
            throw new IllegalBlockingModeException();
        }

        this.socketUDT = socketUDT;

    }

    @Override
    public
    void write(final int b) throws IOException {

        // Just cast it -- this is the same thing SocketOutputStream does.
        final byte[] bytes = {(byte) b};

        write(bytes);

    }

    @Override
    public
    void write(final byte[] bytes) throws IOException {

        write(bytes, 0, bytes.length);

    }

    @Override
    public
    void write(final byte[] bytes, final int off, final int len) throws IOException {

        int bytesRemaining = len;

        while (bytesRemaining > 0) {

            final int count = socketUDT.send(bytes, off + len - bytesRemaining, off + len);

            if (count > 0) {
                bytesRemaining -= count;
                continue;
            }

            if (count == 0) {
                throw new ExceptionSendUDT(socketUDT.id(), ErrorUDT.USER_DEFINED_MESSAGE, "UDT send time out");
            }

            throw new IllegalStateException("Socket has been changed to non-blocking");
        }

    }

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

    @Override
    public
    void flush() throws IOException {
        socketUDT.flush();
    }
}