Mercurial > silverbladetech

annotate Chronosv2/source/SingleInstance.cs @ 21:dfc81f8bb838

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working version for sttocks except ui within metrowpf
author adminsh@apollo
date Tue, 20 Mar 2012 15:07:31 +0000
parents 741981715d94
children
rev   line source
14
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1 using System;
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2 using System.Collections.Generic;
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3 using System.Diagnostics.CodeAnalysis;
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4 using System.Runtime.Remoting;
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5 using System.Runtime.Remoting.Channels;
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6 using System.Runtime.Remoting.Channels.Ipc;
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7 using System.Runtime.Serialization.Formatters;
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8 using System.Threading;
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9 using System.Windows;
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10
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11 namespace Chronos
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12 {
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13 public static class SingleInstance
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14 {
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15 #region · Consts ·
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16
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17 private const string RemoteServiceName = "SingleInstanceApplicationService";
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18
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19 #endregion
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20
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21 #region · Inner Types ·
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22
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23 private class IpcRemoteService : MarshalByRefObject
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24 {
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25 #region · Methods ·
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26
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27 /// <summary>Activate the first instance of the application.</summary>
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28 /// <param name="args">Command line arguemnts to proxy.</param>
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29 public void InvokeFirstInstance(IList<string> args)
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30 {
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31 if (Application.Current != null && !Application.Current.Dispatcher.HasShutdownStarted)
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32 {
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33 Application.Current.Dispatcher.BeginInvoke((Action<object>)((arg) => SingleInstance.ActivateFirstInstance((IList<string>)arg)), args);
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34 }
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35 }
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36
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37 /// <summary>Overrides the default lease lifetime of 5 minutes so that it never expires.</summary>
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38 public override object InitializeLifetimeService()
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39 {
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40 return null;
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41 }
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42
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43 #endregion
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44 }
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45
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46 #endregion
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47
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48 #region · Events ·
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49
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50 public static event EventHandler<SingleInstanceEventArgs> SingleInstanceActivated;
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51
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52 #endregion
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53
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54 #region · Fields ·
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55
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56 private static Mutex SingleInstanceMutex;
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57 private static IpcServerChannel Channel;
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58
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59 #endregion
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60
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61 #region · Methods ·
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62
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63 [SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
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64 public static void SafeDispose<T>(ref T disposable) where T : IDisposable
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65 {
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66 // Dispose can safely be called on an object multiple times.
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67 IDisposable t = disposable;
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68 disposable = default(T);
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69
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70 if (null != t)
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71 {
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72 t.Dispose();
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73 }
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74 }
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75
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76 public static bool InitializeAsFirstInstance(string applicationName)
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77 {
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78 IList<string> commandLineArgs = Environment.GetCommandLineArgs() ?? new string[0];
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79
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80 // Build a repeatable machine unique name for the channel.
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81 string appId = applicationName + Environment.UserName;
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82 string channelName = String.Format("{0}:SingleInstanceIPCChannel", appId);
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83
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84 bool isFirstInstance;
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85
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86 SingleInstanceMutex = new Mutex(true, appId, out isFirstInstance);
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87
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88 if (isFirstInstance)
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89 {
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90 CreateRemoteService(channelName);
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91 }
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92 else
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93 {
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94 SignalFirstInstance(channelName, commandLineArgs);
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95 }
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96
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97 return isFirstInstance;
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98 }
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99
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100 public static void Cleanup()
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101 {
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102 SafeDispose(ref SingleInstanceMutex);
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103
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104 if (Channel != null)
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105 {
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106 ChannelServices.UnregisterChannel(Channel);
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107 Channel = null;
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108 }
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109 }
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110
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111 #endregion
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112
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113 #region · Private Methods ·
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114
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115 private static void CreateRemoteService(string channelName)
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116 {
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117 Channel = new IpcServerChannel(
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118 new Dictionary<string, string>
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119 {
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120 { "name", channelName },
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121 { "portName", channelName },
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122 { "exclusiveAddressUse", "false" },
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123 },
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124 new BinaryServerFormatterSinkProvider { TypeFilterLevel = TypeFilterLevel.Full });
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125
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126 ChannelServices.RegisterChannel(Channel, true);
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127 RemotingServices.Marshal(new IpcRemoteService(), RemoteServiceName);
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128 }
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129
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130 private static void SignalFirstInstance(string channelName, IList<string> args)
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131 {
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132 var secondInstanceChannel = new IpcClientChannel();
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133 ChannelServices.RegisterChannel(secondInstanceChannel, true);
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134
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135 string remotingServiceUrl = String.Format("ipc://{0}/{1}", channelName, RemoteServiceName);
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136
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137 // Obtain a reference to the remoting service exposed by the first instance of the application
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138 var firstInstanceRemoteServiceReference = (IpcRemoteService)RemotingServices.Connect(typeof(IpcRemoteService), remotingServiceUrl);
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139
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140 // Pass along the current arguments to the first instance if it's up and accepting requests.
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141 if (firstInstanceRemoteServiceReference != null)
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142 {
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143 firstInstanceRemoteServiceReference.InvokeFirstInstance(args);
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144 }
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145 }
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146
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147 private static void ActivateFirstInstance(IList<string> args)
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148 {
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149 if (Application.Current != null && !Application.Current.Dispatcher.HasShutdownStarted)
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150 {
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151 var handler = SingleInstanceActivated;
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152
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153 if (handler != null)
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154 {
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155 handler(Application.Current, new SingleInstanceEventArgs { Args = args });
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156 }
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157 }
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158 }
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159
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160 #endregion
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161 }
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162 }