Java tutorial
// GPars - Groovy Parallel Systems // // Copyright 2008-10, 2014 The original author or authors // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package groovyx.gpars.remote.netty.discovery; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.socket.DatagramPacket; import io.netty.handler.codec.MessageToMessageEncoder; import io.netty.util.CharsetUtil; import java.util.List; public class DiscoveryResponseWithRecipientEncoder extends MessageToMessageEncoder<DiscoveryResponseWithRecipient> { @Override protected void encode(ChannelHandlerContext ctx, DiscoveryResponseWithRecipient msg, List<Object> out) throws Exception { DiscoveryResponse response = msg.getResponse(); ByteBuf portBuf = Unpooled.copyInt(response.getServerSocketAddress().getPort()); ByteBuf urlBuf = Unpooled.copiedBuffer(response.getActorUrl(), CharsetUtil.UTF_8); DatagramPacket packet = new DatagramPacket(Unpooled.wrappedBuffer(portBuf, urlBuf), msg.getRecipient()); out.add(packet); } }