| // 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 System; |
| using Org.Apache.REEF.Common.Tasks; |
| using Org.Apache.REEF.IMRU.API; |
| using Org.Apache.REEF.IMRU.OnREEF.Driver; |
| using Org.Apache.REEF.IMRU.OnREEF.MapInputWithControlMessage; |
| using Org.Apache.REEF.IMRU.OnREEF.Parameters; |
| using Org.Apache.REEF.Network.Group.Operators; |
| using Org.Apache.REEF.Network.Group.Task; |
| using Org.Apache.REEF.Tang.Annotations; |
| using Org.Apache.REEF.Utilities.Logging; |
| |
| namespace Org.Apache.REEF.IMRU.OnREEF.IMRUTasks |
| { |
| /// <summary> |
| /// Hosts the IMRU UpdateTask in a REEF task |
| /// </summary> |
| /// <typeparam name="TMapInput">Map input</typeparam> |
| /// <typeparam name="TMapOutput">Map output</typeparam> |
| /// <typeparam name="TResult">Final result</typeparam> |
| internal sealed class UpdateTaskHost<TMapInput, TMapOutput, TResult> : ITask |
| { |
| private static readonly Logger Logger = Logger.GetLogger(typeof(UpdateTaskHost<TMapInput, TMapOutput, TResult>)); |
| |
| private readonly IReduceReceiver<TMapOutput> _dataReceiver; |
| private readonly IBroadcastSender<MapInputWithControlMessage<TMapInput>> _dataAndControlMessageSender; |
| private readonly IUpdateFunction<TMapInput, TMapOutput, TResult> _updateTask; |
| private readonly bool _invokeGC; |
| private readonly IIMRUResultHandler<TResult> _resultHandler; |
| |
| /// <summary> |
| /// </summary> |
| /// <param name="updateTask">The UpdateTask hosted in this REEF Task.</param> |
| /// <param name="groupCommunicationsClient">Used to setup the communications.</param> |
| /// <param name="resultHandler">Result handler</param> |
| /// <param name="invokeGC">Whether to call Garbage Collector after each iteration or not</param> |
| [Inject] |
| private UpdateTaskHost( |
| IUpdateFunction<TMapInput, TMapOutput, TResult> updateTask, |
| IGroupCommClient groupCommunicationsClient, |
| IIMRUResultHandler<TResult> resultHandler, |
| [Parameter(typeof(InvokeGC))] bool invokeGC) |
| { |
| _updateTask = updateTask; |
| var cg = groupCommunicationsClient.GetCommunicationGroup(IMRUConstants.CommunicationGroupName); |
| _dataAndControlMessageSender = |
| cg.GetBroadcastSender<MapInputWithControlMessage<TMapInput>>(IMRUConstants.BroadcastOperatorName); |
| _dataReceiver = cg.GetReduceReceiver<TMapOutput>(IMRUConstants.ReduceOperatorName); |
| _invokeGC = invokeGC; |
| _resultHandler = resultHandler; |
| } |
| |
| /// <summary> |
| /// Performs IMRU iterations on update side |
| /// </summary> |
| /// <param name="memento"></param> |
| /// <returns></returns> |
| public byte[] Call(byte[] memento) |
| { |
| var updateResult = _updateTask.Initialize(); |
| int iterNo = 0; |
| |
| while (updateResult.HasMapInput) |
| { |
| iterNo++; |
| |
| using ( |
| var message = new MapInputWithControlMessage<TMapInput>(updateResult.MapInput, |
| MapControlMessage.AnotherRound)) |
| { |
| _dataAndControlMessageSender.Send(message); |
| } |
| |
| var input = _dataReceiver.Reduce(); |
| |
| if (_invokeGC) |
| { |
| Logger.Log(Level.Verbose, "Calling Garbage Collector"); |
| GC.Collect(); |
| GC.WaitForPendingFinalizers(); |
| } |
| |
| updateResult = _updateTask.Update(input); |
| |
| if (updateResult.HasResult) |
| { |
| _resultHandler.HandleResult(updateResult.Result); |
| } |
| } |
| |
| MapInputWithControlMessage<TMapInput> stopMessage = |
| new MapInputWithControlMessage<TMapInput>(MapControlMessage.Stop); |
| _dataAndControlMessageSender.Send(stopMessage); |
| |
| _resultHandler.Dispose(); |
| return null; |
| } |
| |
| /// <summary> |
| /// Dispose function |
| /// </summary> |
| public void Dispose() |
| { |
| } |
| } |
| } |