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source: trunk/sources/HeuristicLab.Problems.ExternalEvaluation/3.3/Drivers/EvaluationStreamChannel.cs @ 8298

Last change on this file since 8298 was 8298, checked in by abeham, 12 years ago

#1896:

  • Added tags 1000 to max which can be used as extensions to the quality message
  • Updated the evaluator to allow better subclassing in case extensions are used
  • Updated the method signatures to pipe the extension registry down to the channel
File size: 2.7 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.IO;
24using Google.ProtocolBuffers;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Problems.ExternalEvaluation {
30  [Item("EvaluationStreamChannel", "A channel that communicates via an input and an output stream.")]
31  [StorableClass]
32  public class EvaluationStreamChannel : EvaluationChannel {
33
34    private Stream input;
35    private Stream output;
36
37    [StorableConstructor]
38    protected EvaluationStreamChannel(bool deserializing) : base(deserializing) { }
39    protected EvaluationStreamChannel(EvaluationStreamChannel original, Cloner cloner) : base(original, cloner) { }
40    public override IDeepCloneable Clone(Cloner cloner) {
41      return new EvaluationStreamChannel(this, cloner);
42    }
43
44    public EvaluationStreamChannel() : base() { }
45    public EvaluationStreamChannel(Stream input, Stream output)
46      : base() {
47      if (!input.CanRead) throw new ArgumentException("Input stream cannot be read", "input");
48      this.input = input;
49      if (!output.CanWrite) throw new ArgumentException("Output stream cannot be written", "output");
50      this.output = output;
51    }
52
53    #region IExternalEvaluationChannel Members
54
55    public override void Send(IMessage solution) {
56      lock (output) {
57        solution.WriteDelimitedTo(output);
58        output.Flush();
59      }
60    }
61
62    public override IMessage Receive(IBuilder builder, ExtensionRegistry extensions) {
63      QualityMessage message;
64      lock (input) { // only one thread can read from the stream at one time
65        message = QualityMessage.ParseDelimitedFrom(input, extensions);
66      }
67      return message;
68    }
69
70    public override void Close() {
71      base.Close();
72      input.Close();
73      output.Close();
74    }
75
76    #endregion
77  }
78}
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