| // 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. |
| |
| using Org.Apache.REEF.Tang.Annotations; |
| using Org.Apache.REEF.Wake.Remote; |
| using System; |
| using System.Linq; |
| |
| namespace Org.Apache.REEF.Network.Group.Pipelining |
| { |
| /// <summary> |
| /// The codec for PipelineMessage |
| /// </summary> |
| /// <typeparam name="T">The message type</typeparam> |
| public sealed class PipelineMessageCodec<T> : ICodec<PipelineMessage<T>> |
| { |
| /// <summary> |
| /// Creates new PipelineMessageCodec |
| /// </summary> |
| /// <param name="baseCodec">The codec for actual message in PipelineMessage</param> |
| [Inject] |
| private PipelineMessageCodec(ICodec<T> baseCodec) |
| { |
| BaseCodec = baseCodec; |
| } |
| |
| /// <summary>Encodes the given object into a Byte Array</summary> |
| /// <param name="obj"></param> |
| /// <returns>a byte[] representation of the object</returns> |
| public byte[] Encode(PipelineMessage<T> obj) |
| { |
| var baseCoding = BaseCodec.Encode(obj.Data); |
| var result = new byte[baseCoding.Length + sizeof(bool)]; |
| Buffer.BlockCopy(baseCoding, 0, result, 0, baseCoding.Length); |
| Buffer.BlockCopy(BitConverter.GetBytes(obj.IsLast), 0, result, baseCoding.Length, sizeof(bool)); |
| return result; |
| } |
| |
| /// <summary>Decodes the given byte array into a PipelineMessage object</summary> |
| /// <param name="data"></param> |
| /// <returns>the decoded PipelineMessage object</returns> |
| public PipelineMessage<T> Decode(byte[] data) |
| { |
| var message = BaseCodec.Decode(data.Take(data.Length - sizeof(bool)).ToArray()); |
| var isLast = BitConverter.ToBoolean(data, data.Length - sizeof(bool)); |
| return new PipelineMessage<T>(message, isLast); |
| } |
| |
| /// <summary> |
| /// Codec for actual message T |
| /// </summary> |
| public ICodec<T> BaseCodec { get; private set; } |
| } |
| } |