001/** 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018package org.apache.hadoop.hbase.ipc; 019 020import org.apache.hbase.thirdparty.io.netty.buffer.ByteBuf; 021import org.apache.hbase.thirdparty.io.netty.channel.Channel; 022import org.apache.hbase.thirdparty.io.netty.channel.ChannelHandlerContext; 023import org.apache.hbase.thirdparty.io.netty.channel.ChannelPipeline; 024import org.apache.hbase.thirdparty.io.netty.channel.SimpleChannelInboundHandler; 025 026import java.nio.ByteBuffer; 027 028import org.apache.yetus.audience.InterfaceAudience; 029 030/** 031 * Handle connection preamble. 032 * @since 2.0.0` 033 */ 034@InterfaceAudience.Private 035class NettyRpcServerPreambleHandler extends SimpleChannelInboundHandler<ByteBuf> { 036 037 private final NettyRpcServer rpcServer; 038 039 public NettyRpcServerPreambleHandler(NettyRpcServer rpcServer) { 040 this.rpcServer = rpcServer; 041 } 042 043 @Override 044 protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception { 045 NettyServerRpcConnection conn = createNettyServerRpcConnection(ctx.channel()); 046 ByteBuffer buf = ByteBuffer.allocate(msg.readableBytes()); 047 msg.readBytes(buf); 048 buf.flip(); 049 if (!conn.processPreamble(buf)) { 050 conn.close(); 051 return; 052 } 053 ChannelPipeline p = ctx.pipeline(); 054 ((NettyRpcFrameDecoder) p.get("frameDecoder")).setConnection(conn); 055 ((NettyRpcServerRequestDecoder) p.get("decoder")).setConnection(conn); 056 p.remove(this); 057 p.remove("preambleDecoder"); 058 } 059 060 protected NettyServerRpcConnection createNettyServerRpcConnection(Channel channel) { 061 return new NettyServerRpcConnection(rpcServer, channel); 062 } 063}