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source: branches/XmlReaderWriterBranch/HeuristicLab.Grid/ProcessingEngine.cs @ 140

Last change on this file since 140 was 126, checked in by gkronber, 17 years ago

fixed two bugs in the serialization of DistributedEngine and ProcessingEngine

File size: 3.8 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    public override void Persist(string name, XmlWriter writer, IDictionary<Guid, IStorable> persistedObjects) {
54      base.Persist(name, writer, persistedObjects);
55      PersistenceManager.Persist("InitialOperation", initialOperation, writer, persistedObjects);
56    }
57
58    //public override void Populate(XmlNode node, IDictionary<Guid, IStorable> restoredObjects) {
59    //  base.Populate(node, restoredObjects);
60    //  initialOperation = (AtomicOperation)PersistenceManager.Restore(node.SelectSingleNode("InitialOperation"), restoredObjects);
61    //}
62    public override void Populate(XmlReader reader, IDictionary<Guid, IStorable> restoredObjects) {
63      base.Populate(reader, restoredObjects);
64      initialOperation = (AtomicOperation)PersistenceManager.Restore(reader, "InitialOperation", restoredObjects);
65      reader.Read();
66    }
67
68    protected override void ProcessNextOperation() {
69      IOperation operation = myExecutionStack.Pop();
70      if(operation is AtomicOperation) {
71        AtomicOperation atomicOperation = (AtomicOperation)operation;
72        IOperation next = null;
73        try {
74          next = atomicOperation.Operator.Execute(atomicOperation.Scope);
75        } catch(Exception ex) {
76          // push operation on stack again
77          myExecutionStack.Push(atomicOperation);
78          Abort();
79          ThreadPool.QueueUserWorkItem(delegate(object state) { OnExceptionOccurred(ex); });
80        }
81        if(next != null)
82          myExecutionStack.Push(next);
83        OnOperationExecuted(atomicOperation);
84        if(atomicOperation.Operator.Breakpoint) Abort();
85      } else if(operation is CompositeOperation) {
86        CompositeOperation compositeOperation = (CompositeOperation)operation;
87        for(int i = compositeOperation.Operations.Count - 1; i >= 0; i--)
88          myExecutionStack.Push(compositeOperation.Operations[i]);
89      }
90    }
91  }
92}
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