io.github.jzdayz.client.ClientDecoder Maven / Gradle / Ivy
package io.github.jzdayz.client;
import io.github.jzdayz.protocol.Response;
import io.github.jzdayz.util.Constant;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.LengthFieldBasedFrameDecoder;
import lombok.extern.slf4j.Slf4j;
import java.util.concurrent.locks.LockSupport;
@Slf4j
public class ClientDecoder extends LengthFieldBasedFrameDecoder {
private final static int MB_50 = 50 * 1024 * 1024;
private final static int maxFrameLength = Integer.parseInt(System.getProperty("simple.rpc.maxFrameLength", String.valueOf(MB_50)));
public ClientDecoder() {
super(maxFrameLength, 0, 4, 0, 0/*解出的数据集，包括代表长度的字节*/);
}
@Override
protected Object decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
ByteBuf frame = null;
try {
frame = (ByteBuf) super.decode(ctx, in);
if (null == frame) {
return null;
}
Response decode = Response.decode(frame);
Client.WaitResponseFuture waitResponseFuture = Client.CMD.get(decode.getHeader().get(Constant.Header.UUID));
waitResponseFuture.setResponse(decode);
LockSupport.unpark(waitResponseFuture.getWaiter());
return null;
} catch (Exception e) {
log.error("decode");
ctx.channel().close().addListener((ChannelFutureListener) future -> log.info("closeChannel"));
} finally {
if (null != frame) {
frame.release();
}
}
return null;
}
}