| /* |
| * 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 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.scm.container.common.helpers.Pipeline; |
| import org.apache.hadoop.hdds.protocol.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)); |
| |
| } |
| } |