Java tutorial
/* * Copyright 2013-2018 Lilinfeng. * * 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 com.nanxiaoqiang.test.netty.protocol.demo1.codec; import io.netty.buffer.ByteBuf; import java.io.IOException; import java.io.StreamCorruptedException; import org.jboss.marshalling.ByteInput; import org.jboss.marshalling.Unmarshaller; /** * @author Lilinfeng * @date 2014314 * @version 1.0 */ public class MarshallingDecoder { private final Unmarshaller unmarshaller; /** * Creates a new decoder whose maximum object size is {@code 1048576} bytes. * If the size of the received object is greater than {@code 1048576} bytes, * a {@link StreamCorruptedException} will be raised. * * @throws IOException * */ public MarshallingDecoder() throws IOException { unmarshaller = MarshallingCodecFactory.buildUnMarshalling(); } protected Object decode(ByteBuf in) throws Exception { int objectSize = in.readInt();// intdata ByteBuf buf = in.slice(in.readerIndex(), objectSize);// ?Data size?? ByteInput input = new ChannelBufferByteInput(buf); try { unmarshaller.start(input); Object obj = unmarshaller.readObject();// marshallingObject unmarshaller.finish(); in.readerIndex(in.readerIndex() + objectSize);// return obj; } finally { unmarshaller.close(); } } }