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source: trunk/sources/HeuristicLab.Grid/ProcessingEngine.cs @ 123

Last change on this file since 123 was 27, checked in by gkronber, 17 years ago

fixed #34 by not extending ProcessingEngine from ThreadParallelEngine. This also has the benefit that Grid and DistributedEngine are not dependent on ThreadParallelEngine anymore.

File size: 3.2 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 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.Collections.Generic;
24using System.Linq;
25using System.Text;
26using HeuristicLab.Core;
27using System.Xml;
28using System.Threading;
29
30namespace HeuristicLab.Grid {
31  public class ProcessingEngine : EngineBase {
32    private AtomicOperation initialOperation;
33    public AtomicOperation InitialOperation {
34      get { return initialOperation; }
35    }
36
37    public ProcessingEngine()
38      : base() {
39    }
40
41    public ProcessingEngine(IOperatorGraph graph, IScope globalScope, AtomicOperation initialOperation)
42      : base() {
43      this.initialOperation = initialOperation;
44      myGlobalScope = globalScope;
45      myOperatorGraph = graph;
46      myExecutionStack.Push(initialOperation);
47    }
48    public override XmlNode GetXmlNode(string name, XmlDocument document, IDictionary<Guid, IStorable> persistedObjects) {
49      XmlNode node = base.GetXmlNode(name, document, persistedObjects);
50      node.AppendChild(PersistenceManager.Persist("InitialOperation", initialOperation, document, persistedObjects));
51      return node;
52    }
53
54    public override void Populate(XmlNode node, IDictionary<Guid, IStorable> restoredObjects) {
55      base.Populate(node, restoredObjects);
56      initialOperation = (AtomicOperation)PersistenceManager.Restore(node.SelectSingleNode("InitialOperation"), restoredObjects);
57    }
58
59    protected override void ProcessNextOperation() {
60      IOperation operation = myExecutionStack.Pop();
61      if(operation is AtomicOperation) {
62        AtomicOperation atomicOperation = (AtomicOperation)operation;
63        IOperation next = null;
64        try {
65          next = atomicOperation.Operator.Execute(atomicOperation.Scope);
66        } catch(Exception ex) {
67          // push operation on stack again
68          myExecutionStack.Push(atomicOperation);
69          Abort();
70          ThreadPool.QueueUserWorkItem(delegate(object state) { OnExceptionOccurred(ex); });
71        }
72        if(next != null)
73          myExecutionStack.Push(next);
74        OnOperationExecuted(atomicOperation);
75        if(atomicOperation.Operator.Breakpoint) Abort();
76      } else if(operation is CompositeOperation) {
77        CompositeOperation compositeOperation = (CompositeOperation)operation;
78        for(int i = compositeOperation.Operations.Count - 1; i >= 0; i--)
79          myExecutionStack.Push(compositeOperation.Operations[i]);
80      }
81    }
82  }
83}
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