1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2008 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.Collections.Generic;
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24 | using System.Linq;
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25 | using System.Text;
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26 | using System.Timers;
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27 | using HeuristicLab.DataAccess.Interfaces;
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28 | using System.Threading;
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29 | using System.Data;
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30 |
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31 | namespace HeuristicLab.DataAccess.ADOHelper {
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32 | class TransactionManager: ITransactionManager {
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33 | private IDictionary<Thread, ITransaction> transactions =
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34 | new Dictionary<Thread, ITransaction>();
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35 |
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36 | public TransactionManager() {
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37 | System.Timers.Timer timer =
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38 | new System.Timers.Timer();
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39 |
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40 | TimeSpan interval =
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41 | new TimeSpan(0, 1, 0);
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42 |
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43 | timer.Interval = interval.TotalMilliseconds;
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44 | timer.Elapsed += new ElapsedEventHandler(timer_Elapsed);
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45 | timer.Start();
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46 | }
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47 |
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48 | void timer_Elapsed(object sender, ElapsedEventArgs e) {
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49 | lock (this) {
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50 | ICollection<Thread> tobeRemoved =
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51 | new List<Thread>();
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52 |
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53 | foreach (Thread t in transactions.Keys) {
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54 | if (t.ThreadState == ThreadState.Stopped) {
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55 | try {
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56 | transactions[t].Rollback();
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57 | }
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58 | catch (Exception ex) {
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59 | //TODO: Error handling
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60 | }
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61 | finally {
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62 | tobeRemoved.Add(t);
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63 | }
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64 | }
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65 | }
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66 |
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67 | foreach (Thread t in tobeRemoved) {
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68 | transactions.Remove(t);
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69 | }
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70 | }
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71 | }
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72 |
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73 | #region ITransactionManager Members
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74 | public ITransaction BeginTransaction() {
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75 | lock (this) {
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76 | Thread current = Thread.CurrentThread;
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77 |
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78 | if (!transactions.ContainsKey(current)) {
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79 | ITransaction trans = new Transaction(this);
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80 | transactions[current] = trans;
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81 | }
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82 |
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83 | return transactions[current];
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84 | }
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85 | }
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86 |
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87 | public ITransaction GetTransactionForCurrentThread() {
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88 | lock (this) {
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89 | Thread current = Thread.CurrentThread;
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90 |
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91 | if(transactions.ContainsKey(current))
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92 | return transactions[current];
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93 | else
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94 | return null;
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95 | }
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96 | }
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97 |
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98 | internal void RemoveTransaction(ITransaction trans) {
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99 | lock (this) {
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100 | ICollection<Thread> tobeRemoved =
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101 | new List<Thread>();
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102 |
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103 | foreach (Thread t in transactions.Keys) {
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104 | if (transactions[t].Equals(trans)) {
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105 | tobeRemoved.Add(t);
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106 | }
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107 | }
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108 |
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109 | foreach (Thread t in tobeRemoved) {
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110 | transactions.Remove(t);
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111 | }
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112 | }
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113 | }
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114 |
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115 | #endregion
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116 | }
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117 | }
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