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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.ozone.container.common.transport.server;
import com.google.common.base.Preconditions;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.protobuf.ProtobufDecoder;
import io.netty.handler.codec.protobuf.ProtobufEncoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32FrameDecoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32LengthFieldPrepender;
import org.apache.hadoop.hdds.protocol.proto.ContainerProtos
.ContainerCommandRequestProto;
import org.apache.hadoop.ozone.container.common.interfaces.ContainerDispatcher;
/**
* Creates a channel for the XceiverServer.
*/
public class XceiverServerInitializer extends ChannelInitializer<SocketChannel>{
private final ContainerDispatcher dispatcher;
public XceiverServerInitializer(ContainerDispatcher dispatcher) {
Preconditions.checkNotNull(dispatcher);
this.dispatcher = dispatcher;
}
/**
* This method will be called once the Channel is registered. After
* the method returns this instance will be removed from the {@link
* ChannelPipeline}
*
* @param ch the 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 pipeline = ch.pipeline();
pipeline.addLast(new ProtobufVarint32FrameDecoder());
pipeline.addLast(new ProtobufDecoder(ContainerCommandRequestProto
.getDefaultInstance()));
pipeline.addLast(new ProtobufVarint32LengthFieldPrepender());
pipeline.addLast(new ProtobufEncoder());
pipeline.addLast(new XceiverServerHandler(dispatcher));
}
}
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