Java tutorial
/* * TeleStax, Open Source Cloud Communications * Copyright 2011-2017, Telestax Inc and individual contributors * by the @authors tag. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package org.restcomm.media.control.mgcp.network.netty; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.util.List; import org.apache.log4j.Logger; import org.restcomm.media.control.mgcp.message.MgcpMessage; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.DefaultAddressedEnvelope; import io.netty.channel.socket.DatagramPacket; import io.netty.handler.codec.MessageToMessageEncoder; /** * Encodes an MGCP message into a {@link DatagramPacket} ready to be sent to remote peer over the network. * * @author Henrique Rosa (henrique.rosa@telestax.com) * */ public class MgcpMessageEncoder extends MessageToMessageEncoder<DefaultAddressedEnvelope<MgcpMessage, SocketAddress>> { private static final Logger log = Logger.getLogger(MgcpMessageEncoder.class); public static final String PIPELINE_KEY = "mgcp-encoder"; @Override protected void encode(ChannelHandlerContext ctx, DefaultAddressedEnvelope<MgcpMessage, SocketAddress> msg, List<Object> out) throws Exception { final InetSocketAddress sender = (InetSocketAddress) msg.sender(); final InetSocketAddress recipient = (InetSocketAddress) msg.recipient(); final byte[] content = msg.content().toString().getBytes(); final ByteBuf buffer = Unpooled.buffer(content.length).writeBytes(content); final DatagramPacket packet = new DatagramPacket(buffer, recipient, sender); if (log.isDebugEnabled()) { log.debug("Sending outgoing message to " + recipient.getHostString() + "\n" + msg.toString()); } out.add(packet); } }