1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2012 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 HeuristicLab.Clients.Common;
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24 | using HeuristicLab.Common;
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25 | using HeuristicLab.Core;
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26 |
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27 | namespace HeuristicLab.Clients.Access {
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28 | [Item("AccessClient", "Access client.")]
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29 | public sealed class AccessClient : IContent {
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30 | private static AccessClient instance;
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31 | public static AccessClient Instance {
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32 | get {
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33 | if (instance == null) instance = new AccessClient();
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34 | return instance;
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35 | }
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36 | }
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37 |
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38 | #region Properties
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39 | private ItemList<LightweightUser> users;
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40 | public ItemList<LightweightUser> Users {
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41 | get { return users; }
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42 | }
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43 | #endregion
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44 |
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45 | private AccessClient() {
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46 | users = new ItemList<LightweightUser>();
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47 | }
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48 |
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49 | #region Refresh
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50 | private void Refresh() {
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51 | OnRefreshing();
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52 | users = new ItemList<LightweightUser>();
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53 |
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54 | try {
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55 | users.AddRange(CallRunCreationService<ItemList<LightweightUser>>(s => new ItemList<LightweightUser>(s.GetAllLightweightUsers())));
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56 | }
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57 | finally {
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58 | OnRefreshed();
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59 | }
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60 | }
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61 | public void RefreshAsync(Action<Exception> exceptionCallback) {
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62 | var call = new Func<Exception>(delegate() {
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63 | try {
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64 | Refresh();
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65 | }
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66 | catch (Exception ex) {
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67 | return ex;
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68 | }
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69 | return null;
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70 | });
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71 | call.BeginInvoke(delegate(IAsyncResult result) {
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72 | Exception ex = call.EndInvoke(result);
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73 | if (ex != null) exceptionCallback(ex);
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74 | }, null);
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75 | }
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76 | #endregion
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77 |
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78 | public static void Store(IAccessItem item) {
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79 | //TODO: never used? delete?
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80 | }
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81 |
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82 | #region Events
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83 | public event EventHandler Refreshing;
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84 | private void OnRefreshing() {
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85 | EventHandler handler = Refreshing;
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86 | if (handler != null) handler(this, EventArgs.Empty);
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87 | }
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88 | public event EventHandler Refreshed;
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89 | private void OnRefreshed() {
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90 | EventHandler handler = Refreshed;
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91 | if (handler != null) handler(this, EventArgs.Empty);
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92 | }
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93 | #endregion
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94 |
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95 | #region Helpers
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96 | private static void CallRunCreationService(Action<IAccessService> call) {
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97 | AccessServiceClient client = ClientFactory.CreateClient<AccessServiceClient, IAccessService>();
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98 | try {
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99 | call(client);
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100 | }
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101 | finally {
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102 | try {
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103 | client.Close();
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104 | }
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105 | catch (Exception) {
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106 | client.Abort();
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107 | }
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108 | }
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109 | }
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110 | private static T CallRunCreationService<T>(Func<IAccessService, T> call) {
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111 | AccessServiceClient client = ClientFactory.CreateClient<AccessServiceClient, IAccessService>();
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112 | try {
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113 | return call(client);
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114 | }
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115 | finally {
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116 | try {
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117 | client.Close();
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118 | }
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119 | catch (Exception) {
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120 | client.Abort();
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121 | }
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122 | }
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123 | }
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124 | #endregion
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125 | }
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126 | }
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