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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.hadoop.hdds.scm;
import org.apache.ratis.shaded.io.netty.channel.ChannelInitializer;
import org.apache.ratis.shaded.io.netty.channel.ChannelPipeline;
import org.apache.ratis.shaded.io.netty.channel.socket.SocketChannel;
import org.apache.ratis.shaded.io.netty.handler.codec.protobuf.ProtobufDecoder;
import org.apache.ratis.shaded.io.netty.handler.codec.protobuf.ProtobufEncoder;
import org.apache.ratis.shaded.io.netty.handler.codec.protobuf
.ProtobufVarint32FrameDecoder;
import org.apache.ratis.shaded.io.netty.handler.codec.protobuf
.ProtobufVarint32LengthFieldPrepender;
import org.apache.hadoop.hdds.scm.container.common.helpers.Pipeline;
import org.apache.hadoop.hdds.protocol.datanode.proto.ContainerProtos;
import java.util.concurrent.Semaphore;
/**
* Setup the netty pipeline.
*/
public class XceiverClientInitializer extends
ChannelInitializer<SocketChannel> {
private final Pipeline pipeline;
private final Semaphore semaphore;
/**
* Constructs an Initializer for the client pipeline.
* @param pipeline - Pipeline.
*/
public XceiverClientInitializer(Pipeline pipeline, Semaphore semaphore) {
this.pipeline = pipeline;
this.semaphore = semaphore;
}
/**
* This method will be called once when the Channel is registered. After
* the method returns this instance will be removed from the
* ChannelPipeline of the Channel.
*
* @param ch Channel which was registered.
* @throws Exception is thrown if an error occurs. In that case the
* Channel will be closed.
*/
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline p = ch.pipeline();
p.addLast(new ProtobufVarint32FrameDecoder());
p.addLast(new ProtobufDecoder(ContainerProtos
.ContainerCommandResponseProto.getDefaultInstance()));
p.addLast(new ProtobufVarint32LengthFieldPrepender());
p.addLast(new ProtobufEncoder());
p.addLast(new XceiverClientHandler(this.pipeline, this.semaphore));
}
}
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