Java tutorial
/* Licensed to Diennea S.r.l. under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. Diennea S.r.l. licenses this file to you 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 herddb.network.netty; import herddb.proto.Pdu; import herddb.proto.PduCodec; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufUtil; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInboundHandlerAdapter; import io.netty.util.ReferenceCountUtil; import java.io.IOException; import java.util.logging.Level; import java.util.logging.Logger; /** * Decodes bytes to messages * * @author enrico.olivelli */ public class ProtocolMessageDecoder extends ChannelInboundHandlerAdapter { private static final Logger LOGGER = Logger.getLogger(ProtocolMessageDecoder.class.getName()); @Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { ByteBuf in = (ByteBuf) msg; if (LOGGER.isLoggable(Level.FINEST)) { StringBuilder dumper = new StringBuilder(); ByteBufUtil.appendPrettyHexDump(dumper, in); LOGGER.log(Level.FINEST, "Received from {}: {}", new Object[] { ctx.channel(), dumper }); } try { Pdu pdu = PduCodec.decodePdu(in); ctx.fireChannelRead(pdu); } catch (Throwable err) { LOGGER.log(Level.SEVERE, "Error decoding PDU", err); ReferenceCountUtil.safeRelease(msg); } } }