1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2019 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.IO;
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24 | using Google.ProtocolBuffers;
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25 | using HeuristicLab.Common;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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28 |
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29 | namespace HeuristicLab.Problems.ExternalEvaluation {
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30 | [Item("EvaluationStreamChannel", "A channel that communicates via an input and an output stream.")]
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31 | [StorableClass]
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32 | public class EvaluationStreamChannel : EvaluationChannel {
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33 |
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34 | private Stream input;
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35 | private Stream output;
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36 |
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37 | [StorableConstructor]
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38 | protected EvaluationStreamChannel(bool deserializing) : base(deserializing) { }
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39 | protected EvaluationStreamChannel(EvaluationStreamChannel original, Cloner cloner) : base(original, cloner) { }
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40 | public override IDeepCloneable Clone(Cloner cloner) {
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41 | return new EvaluationStreamChannel(this, cloner);
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42 | }
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43 |
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44 | public EvaluationStreamChannel() : base() { }
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45 | public EvaluationStreamChannel(Stream input, Stream output)
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46 | : base() {
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47 | if (!input.CanRead) throw new ArgumentException("Input stream cannot be read", "input");
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48 | this.input = input;
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49 | if (!output.CanWrite) throw new ArgumentException("Output stream cannot be written", "output");
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50 | this.output = output;
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51 | }
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52 |
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53 | #region IExternalEvaluationChannel Members
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54 |
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55 | public override void Send(IMessage solution) {
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56 | lock (output) {
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57 | solution.WriteDelimitedTo(output);
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58 | output.Flush();
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59 | }
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60 | }
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61 |
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62 | public override IMessage Receive(IBuilder builder, ExtensionRegistry extensions) {
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63 | QualityMessage message;
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64 | lock (input) { // only one thread can read from the stream at one time
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65 | message = QualityMessage.ParseDelimitedFrom(input, extensions);
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66 | }
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67 | return message;
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68 | }
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69 |
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70 | public override void Close() {
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71 | base.Close();
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72 | input.Close();
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73 | output.Close();
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74 | }
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75 |
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76 | #endregion
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77 | }
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78 | }
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