Example usage for java.net DatagramPacket DatagramPacket

Introduction

In this page you can find the example usage for java.net DatagramPacket DatagramPacket.

Prototype

public DatagramPacket(byte buf[], int length, SocketAddress address)

Source Link

Document

Constructs a datagram packet for sending packets of length length to the specified port number on the specified host.

Usage

From source file:net.dv8tion.jda.audio.AudioWebSocket.java

private void setupUdpKeepAliveThread() {
    udpKeepAliveThread = new Thread("AudioWebSocket UDP-KeepAlive Guild: " + guild.getId()) {
        @Override//w  w w  .j  a v  a 2 s  . c  o  m
        public void run() {
            while (socket.isOpen() && !udpSocket.isClosed() && !this.isInterrupted()) {
                long seq = 0;
                try {
                    ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES + 1);
                    buffer.put((byte) 0xC9);
                    buffer.putLong(seq);
                    DatagramPacket keepAlivePacket = new DatagramPacket(buffer.array(), buffer.array().length,
                            address);
                    udpSocket.send(keepAlivePacket);

                    Thread.sleep(5000); //Wait 5 seconds to send next keepAlivePacket.
                } catch (NoRouteToHostException e) {
                    LOG.warn("Closing AudioConnection due to inability to ping audio packets.");
                    LOG.warn("Cannot send audio packet because JDA navigate the route to Discord.\n"
                            + "Are you sure you have internet connection? It is likely that you've lost connection.");
                    AudioWebSocket.this.close(true, -1);
                    break;
                } catch (IOException e) {
                    LOG.log(e);
                } catch (InterruptedException e) {
                    //We were asked to close.
                    //                        e.printStackTrace();
                }
            }
        }
    };
    udpKeepAliveThread.setPriority(Thread.NORM_PRIORITY + 1);
    udpKeepAliveThread.setDaemon(true);
    udpKeepAliveThread.start();
}

From source file:net.dv8tion.jda.core.audio.AudioWebSocket.java

private void setupKeepAlive(final int keepAliveInterval) {
    if (keepAliveHandle != null)
        LOG.fatal("Setting up a KeepAlive runnable while the previous one seems to still be active!!");

    Runnable keepAliveRunnable = () -> {
        if (socket.isOpen() && socket.isOpen() && !udpSocket.isClosed()) {
            send(new JSONObject().put("op", 3).put("d", System.currentTimeMillis()).toString());

            long seq = 0;
            try {
                ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES + 1);
                buffer.put((byte) 0xC9);
                buffer.putLong(seq);//from   w w w. j a  va 2s.  com
                DatagramPacket keepAlivePacket = new DatagramPacket(buffer.array(), buffer.array().length,
                        address);
                udpSocket.send(keepAlivePacket);

            } catch (NoRouteToHostException e) {
                LOG.warn("Closing AudioConnection due to inability to ping audio packets.");
                LOG.warn("Cannot send audio packet because JDA navigate the route to Discord.\n"
                        + "Are you sure you have internet connection? It is likely that you've lost connection.");
                AudioWebSocket.this.close(ConnectionStatus.ERROR_LOST_CONNECTION);
            } catch (IOException e) {
                LOG.log(e);
            }
        }
    };

    try {
        keepAliveHandle = keepAlivePool.scheduleAtFixedRate(keepAliveRunnable, 0, keepAliveInterval,
                TimeUnit.MILLISECONDS);
    } catch (RejectedExecutionException ignored) {
    } //ignored because this is probably caused due to a race condition
      // related to the threadpool shutdown.
}