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source: trunk/sources/HeuristicLab.CEDMA.Server/RunScheduler.cs @ 378

Last change on this file since 378 was 378, checked in by gkronber, 16 years ago

worked on #189

File size: 2.9 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.CEDMA.DB;
27using HeuristicLab.CEDMA.DB.Interfaces;
28using HeuristicLab.Core;
29using System.Threading;
30using HeuristicLab.CEDMA.Core;
31using HeuristicLab.Grid;
32
33namespace HeuristicLab.CEDMA.Server {
34  public class RunScheduler {
35    private Database database;
36    private JobManager jobManager;
37    private const int RELEASE_INTERVAL = 5;
38    private object remoteCommLock = new object();
39
40    public RunScheduler(Database database, JobManager jobManager) {
41      this.database = database;
42      this.jobManager = jobManager;
43    }
44    public void Run() {
45      while(true) {
46        ReleaseWaitingRuns();
47        Thread.Sleep(TimeSpan.FromSeconds(RELEASE_INTERVAL));
48      }
49    }
50    private void ReleaseWaitingRuns() {
51      ICollection<RunEntry> runs;
52      lock(remoteCommLock) {
53        runs = database.GetRuns(ProcessStatus.Waiting);
54      }
55      foreach(RunEntry entry in runs) {
56        IOperatorGraph opGraph = (IOperatorGraph)DbPersistenceManager.Restore(entry.RawData);
57        Scope scope = new Scope();
58        AtomicOperation op = new AtomicOperation(opGraph.InitialOperator, scope);
59        WaitHandle wHandle;
60        lock(remoteCommLock) {
61          wHandle = jobManager.BeginExecuteOperation(scope, op);
62          database.UpdateRunStatus(entry.Id, ProcessStatus.Active);
63          database.UpdateRunStart(entry.Id, DateTime.Now);
64        }
65
66        ThreadPool.QueueUserWorkItem(WaitForFinishedRun, new object[] {wHandle, op, entry});
67      }
68    }
69
70    private void WaitForFinishedRun(object state) {
71      object[] param = (object[])state;
72      WaitHandle wHandle = (WaitHandle)param[0];
73      AtomicOperation op = (AtomicOperation)param[1];
74      RunEntry entry = (RunEntry)param[2];
75      wHandle.WaitOne();
76      wHandle.Close();
77      lock(remoteCommLock) {
78        jobManager.EndExecuteOperation(op);
79        database.UpdateRunStatus(entry.Id, ProcessStatus.Finished);
80        database.UpdateRunFinished(entry.Id, DateTime.Now);
81      }
82    }
83  }
84}
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