| // 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.Threading; |
| using System.Threading.Tasks; |
| using Org.Apache.REEF.Wake.StreamingCodec; |
| |
| namespace Org.Apache.REEF.Network.Group.Pipelining |
| { |
| /// <summary> |
| /// The streaming codec for PipelineMessage |
| /// </summary> |
| /// <typeparam name="T">The message type</typeparam> |
| public sealed class StreamingPipelineMessageCodec<T> : IStreamingCodec<PipelineMessage<T>> |
| { |
| /// <summary> |
| /// Creates new PipelineMessageCodec |
| /// </summary> |
| /// <param name="baseCodec">The codec for actual message in PipelineMessage</param> |
| [Inject] |
| private StreamingPipelineMessageCodec(IStreamingCodec<T> baseCodec) |
| { |
| BaseCodec = baseCodec; |
| } |
| |
| /// <summary> |
| /// Codec for actual message T |
| /// </summary> |
| public IStreamingCodec<T> BaseCodec { get; private set; } |
| |
| /// <summary> |
| /// Instantiate the class from the reader. |
| /// </summary> |
| /// <param name="reader">The reader from which to read</param> |
| /// <returns>The Pipeline Message read from the reader</returns> |
| public PipelineMessage<T> Read(IDataReader reader) |
| { |
| var message = BaseCodec.Read(reader); |
| var isLast = reader.ReadBoolean(); |
| return new PipelineMessage<T>(message, isLast); |
| } |
| |
| /// <summary> |
| /// Writes the class fields to the writer. |
| /// </summary> |
| /// <param name="obj">The object to be encoded</param> |
| /// <param name="writer">The writer to which to write</param> |
| public void Write(PipelineMessage<T> obj, IDataWriter writer) |
| { |
| BaseCodec.Write(obj.Data, writer); |
| writer.WriteBoolean(obj.IsLast); |
| } |
| |
| /// <summary> |
| /// Instantiate the class from the reader. |
| /// </summary> |
| /// <param name="reader">The reader from which to read</param> |
| /// <param name="token">Cancellation token</param> |
| /// <returns>The Pipeline Message read from the reader</returns> |
| public async Task<PipelineMessage<T>> ReadAsync(IDataReader reader, CancellationToken token) |
| { |
| var message = await BaseCodec.ReadAsync(reader, token); |
| var isLast = await reader.ReadBooleanAsync(token); |
| return new PipelineMessage<T>(message, isLast); |
| } |
| |
| /// <summary> |
| /// Writes the class fields to the writer. |
| /// </summary> |
| /// <param name="obj">The object to be encoded</param> |
| /// <param name="writer">The writer to which to write</param> |
| /// <param name="token">Cancellation token</param> |
| public async System.Threading.Tasks.Task WriteAsync(PipelineMessage<T> obj, IDataWriter writer, CancellationToken token) |
| { |
| await BaseCodec.WriteAsync(obj.Data, writer, token); |
| await writer.WriteBooleanAsync(obj.IsLast, token); |
| } |
| } |
| } |