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Copy pathtio-BaseHandler.java
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65 lines (60 loc) · 1.88 KB
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package com.kevin.tio.common;
import java.nio.ByteBuffer;
import org.tio.core.ChannelContext;
import org.tio.core.GroupContext;
import org.tio.core.exception.AioDecodeException;
import org.tio.core.intf.AioHandler;
/**
* 抽象Handler
* 客户端服务端编/解码方式一样
* @author KevinBlandy
* @version 1.0
* @date 2017年5月2日 下午10:57:21
*/
public abstract class BaseHandler implements AioHandler<Object,DataPacket,Object>{
/**
* 数据解码
*/
@Override
public ByteBuffer encode(DataPacket packet, GroupContext<Object, DataPacket, Object> groupContext,ChannelContext<Object, DataPacket, Object> channelContext) {
byte[] data = packet.getData(); //获取到数据
int dataLength = data.length; //获取数据长度
int length = DataPacket.DATA_LENGTH + dataLength; //计算包体总长度
ByteBuffer byteBuffer = ByteBuffer.allocate(length); //创建Buffer
byteBuffer.putInt(dataLength); //写入包头信息(数据长度)
byteBuffer.put(data); //写入数据
return byteBuffer;
}
/**
* 数据编码
*/
@Override
public DataPacket decode(ByteBuffer buffer, ChannelContext<Object, DataPacket, Object> channelContext)throws AioDecodeException {
//可读数据总长度
int remaining = buffer.remaining();
if(remaining < DataPacket.DATA_LENGTH){
//组包失败,返回null
return null;
}
//获取消息体长度
int dataLength = buffer.getInt();
if(dataLength < 0){
//数据格式不正确,抛出异常
throw new AioDecodeException("bodyLength [" + dataLength + "] is not right, remote:" + channelContext.getClientNode());
}
int length = DataPacket.DATA_LENGTH + dataLength; //计算包体的总长度(消息头长度 + 消息体长度)
if(remaining < length){
//组包失败
return null;
}
//组包成功
DataPacket dataPacket = new DataPacket();
if(dataLength > 0){
//包体数据存在
byte[] data = new byte[dataLength];
buffer.get(data);
dataPacket.setData(data);
}
return dataPacket;
}
}