[1146] | 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 | using System.Text;
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| 4 |
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| 5 | namespace IndianHealthService.BMXNet.Services
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| 6 | {
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| 7 | internal class BMXRemoteSessionPool : RemoteSessionPool
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| 8 | {
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| 9 |
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| 10 | private Log _log = new NullLog();
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| 11 |
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| 12 | public Log Log
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| 13 | {
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| 14 | get { return _log; }
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| 15 | set { _log = value; }
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| 16 | }
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| 17 |
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| 18 | public void Begin(BMXNetSessionConnectionSource aSource)
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| 19 | {
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| 20 | this.Source = aSource;
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| 21 | this.AllowAllocation = true;
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| 22 | }
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| 23 |
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| 24 | private bool _allowAllocation = false;
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| 25 |
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| 26 | public bool AllowAllocation
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| 27 | {
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| 28 | get { return _allowAllocation; }
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| 29 | set { _allowAllocation = value; }
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| 30 | }
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| 31 |
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| 32 |
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| 33 | private int _maxSessions = 5;
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| 34 |
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| 35 | public int MaxSessions
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| 36 | {
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| 37 | get { return _maxSessions; }
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| 38 | set { _maxSessions = value; }
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| 39 | }
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| 40 |
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| 41 | public int IdleSessionCount
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| 42 | {
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| 43 | get
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| 44 | {
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| 45 | return this.IdleConnections.Count;
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| 46 | }
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| 47 | }
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| 48 |
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| 49 | public int AvailableSessionCount
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| 50 | {
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| 51 | get
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| 52 | {
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| 53 | return this.MaxSessions - this.AllocatedSessions.Count;
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| 54 | }
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| 55 | }
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| 56 |
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| 57 |
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| 58 | private BMXNetSessionConnectionSource _source = null;
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| 59 |
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| 60 | internal BMXNetSessionConnectionSource Source
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| 61 | {
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| 62 | get { return _source; }
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| 63 | set { _source = value; }
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| 64 | }
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| 65 |
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| 66 |
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| 67 | private List<BMXNetSessionConnection> _idleConnections = new List<BMXNetSessionConnection>();
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| 68 |
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| 69 | public List<BMXNetSessionConnection> IdleConnections
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| 70 | {
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| 71 | get { return _idleConnections; }
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| 72 | set { _idleConnections = value; }
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| 73 | }
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| 74 |
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| 75 | private List<BMXNetRemoteSession> _allocatedSessions = new List<BMXNetRemoteSession>();
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| 76 |
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| 77 | public List<BMXNetRemoteSession> AllocatedSessions
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| 78 | {
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| 79 | get { return _allocatedSessions; }
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| 80 | set { _allocatedSessions = value; }
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| 81 | }
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| 82 |
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| 83 | #region RemoteSessionPool Members
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| 84 |
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| 85 | public bool HasAvailableSession
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| 86 | {
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| 87 | get { return this.AvailableSessionCount > 0; }
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| 88 | }
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| 89 | public RemoteSession OpenSession()
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| 90 | {
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| 91 | return this.OpenSession(this.Log);
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| 92 | }
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| 93 |
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| 94 | public RemoteSession OpenSession(Log aLog)
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| 95 | {
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| 96 | if (this.HasAvailableSession && this.AllowAllocation)
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| 97 | {
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| 98 | BMXNetRemoteSession session = new BMXNetRemoteSession();
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| 99 | session.Log = aLog;
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| 100 | if (this.IdleConnections.Count > 0)
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| 101 | {
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| 102 | this.Log.Log("BMX NET", "Debug", "Open Idle Session ");
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| 103 |
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| 104 | session.IsPrimary = (this.IdleSessionCount + this.AllocatedSessions.Count) == 1;
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| 105 | this.AllocatedSessions.Add(session);
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| 106 | BMXNetSessionConnection connection = this.IdleConnections[0];
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| 107 | connection.ReceiveTimeout = 0;
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| 108 | connection.SendTimeout = 0;
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| 109 | this.IdleConnections.Remove(connection);
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| 110 | session.Begin(connection, this);
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| 111 | }
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| 112 | else
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| 113 | {
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| 114 | this.Log.Log("BMX NET", "Debug", "Open New Session ");
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| 115 | session.IsPrimary = (this.IdleSessionCount + this.AllocatedSessions.Count) == 0;
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| 116 | this.AllocatedSessions.Add(session);
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| 117 | session.Begin(this.Source.OpenConnection(), this);
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| 118 | }
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| 119 |
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| 120 | if (!session.IsPrimary)
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| 121 | {
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| 122 | session.PrimarySession(this.PrimarySession);
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| 123 | }
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| 124 | return (RemoteSession)session;
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| 125 | }
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| 126 | else
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| 127 | {
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| 128 | this.Log.Log("BMX NET", "Info", "No Session Available");
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| 129 | return null;
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| 130 | }
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| 131 | }
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| 132 |
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| 133 |
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| 134 | private BMXNetRemoteSession PrimarySession
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| 135 | {
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| 136 | get
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| 137 | {
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| 138 | foreach (BMXNetRemoteSession each in this.AllocatedSessions)
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| 139 | {
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| 140 | if (each.IsPrimary)
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| 141 | {
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| 142 | return each;
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| 143 | }
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| 144 | }
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| 145 | return null;
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| 146 | }
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| 147 | }
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| 148 |
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| 149 | private void ReleaseSession(RemoteSession aSession)
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| 150 | {
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| 151 | BMXNetRemoteSession bmxSession = aSession as BMXNetRemoteSession;
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| 152 |
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| 153 | if (bmxSession.IsPrimary)
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| 154 | {
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| 155 | this.Close();
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| 156 | }
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| 157 | else
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| 158 | {
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| 159 | bmxSession.Suspend(this);
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| 160 | this.AllocatedSessions.Remove(bmxSession);
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| 161 | this.IdleConnections.Add(bmxSession.SessionConnection);
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| 162 | }
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| 163 | }
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| 164 |
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| 165 | public void CloseSession(RemoteSession aSession)
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| 166 | {
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| 167 | if (aSession.IsPrimary)
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| 168 | {
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| 169 | this.TerminateAll();
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| 170 | }
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| 171 | else
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| 172 | {
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| 173 | this.ReleaseSession(aSession);
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| 174 | }
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| 175 | }
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| 176 |
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| 177 | public void Close()
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| 178 | {
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| 179 | this.AllowAllocation = false;
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| 180 | foreach (BMXNetRemoteSession each in new List<BMXNetRemoteSession>(this.AllocatedSessions))
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| 181 | {
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| 182 | each.IsPrimary = false;
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| 183 | this.ReleaseSession(each);
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| 184 | }
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| 185 | this.TerminateAll();
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| 186 | }
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| 187 |
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| 188 | #endregion
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| 189 |
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| 190 |
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| 191 |
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| 192 | public void CloseAll()
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| 193 | {
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| 194 | List<BMXNetRemoteSession> toClose = new List<BMXNetRemoteSession>(this.AllocatedSessions);
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| 195 | this.AllocatedSessions = new List<BMXNetRemoteSession>();
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| 196 | foreach (BMXNetRemoteSession each in toClose)
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| 197 | {
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| 198 | this.CloseSession(each);
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| 199 | }
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| 200 |
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| 201 | }
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| 202 |
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| 203 |
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| 204 | private void TerminateAll()
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| 205 | {
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| 206 | this.AllowAllocation = false;
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| 207 |
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| 208 | this.CloseAll();
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| 209 | this.TerminateIdleSessions();
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| 210 | }
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| 211 |
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| 212 |
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| 213 | /// <summary>
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| 214 | /// Note: idle session connections are really being terminated. We
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| 215 | /// do not re-use BMXNetRemoteSession objects that wrap the session connection
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| 216 | /// </summary>
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| 217 | public void TerminateIdleSessions()
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| 218 | {
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| 219 | List<BMXNetSessionConnection> toTerminate = new List<BMXNetSessionConnection>(this.IdleConnections);
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| 220 | this.IdleConnections = new List<BMXNetSessionConnection>();
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| 221 | foreach (BMXNetSessionConnection each in toTerminate)
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| 222 | {
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| 223 | this.TerminateConnection(each);
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| 224 | }
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| 225 | }
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| 226 |
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| 227 | private void TerminateConnection(BMXNetSessionConnection aConnection)
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| 228 | {
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| 229 | this.Source.CloseConnection(aConnection);
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| 230 | }
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| 231 |
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| 232 |
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| 233 |
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| 234 | }
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| 235 | }
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