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1 /* |
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2 * Copyright (c) 2005-2006 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: CVASDBMonitor class is an active object that is a wrapper around |
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15 * the RDBNotifier class. Events from RDBNotifier are handled by |
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16 * encapsulating them in a CNssVASDBEvent object and passing it to all |
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17 * its observers. In addition to the events provided by RDBNotifier, |
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18 * CVASDBMonitor also provides additional events when a entry is added, |
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19 * changed or deleted from the VAS DB. CVASDBMonitor owns the list of |
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20 * observers of the VAS DB. |
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21 * |
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22 */ |
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23 |
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24 |
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25 // INCLUDE FILES |
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26 #include "nssvascresourcehandler.h" |
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27 #include "nssvascvasdbeventmonitor.h" |
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28 |
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29 |
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30 // ================= MEMBER FUNCTIONS ======================= |
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31 |
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32 // --------------------------------------------------------- |
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33 // CNssVASDBEventMonitor::ConstructL |
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34 // C++ constructor can NOT contain any code that |
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35 // might leave. |
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36 // --------------------------------------------------------- |
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37 // |
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38 CNssVASDBEventMonitor::CNssVASDBEventMonitor() : CActive( CActive::EPriorityStandard) |
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39 { |
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40 } |
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41 |
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42 |
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43 // --------------------------------------------------------- |
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44 // CNssVASDBEventMonitor::ConstructL |
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45 // EPOC constructor can leave. |
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46 // --------------------------------------------------------- |
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47 // |
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48 void CNssVASDBEventMonitor::ConstructL() |
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49 { |
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50 iObservers = new ( ELeave ) CArrayPtrFlat<MNssVASDatabaseObserver>( 1 ); |
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51 |
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52 TFileName serverSideFilename; |
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53 |
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54 User::LeaveIfError( iDbSession.Connect() ); |
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55 |
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56 // Open the database. |
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57 User::LeaveIfError( iDatabase.Open( iDbSession, KVasDatabaseName, KVasDatabaseFormatString ) ); |
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58 |
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59 User::LeaveIfError( iNotifier.Open( iDatabase ) ); |
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60 StartMonitoring(); |
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61 } |
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62 |
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63 // --------------------------------------------------------- |
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64 // CNssVASDBEventMonitor::NewL |
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65 // Two-phased constructor. |
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66 // --------------------------------------------------------- |
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67 // |
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68 CNssVASDBEventMonitor* CNssVASDBEventMonitor::NewL() |
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69 { |
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70 CNssVASDBEventMonitor* self = new (ELeave) CNssVASDBEventMonitor; |
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71 |
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72 CleanupStack::PushL( self ); |
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73 CActiveScheduler::Add( self ); |
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74 self->ConstructL(); |
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75 CleanupStack::Pop( self ); |
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76 return self; |
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77 } |
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78 |
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79 |
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80 // --------------------------------------------------------- |
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81 // CNssVASDBEventMonitor::~CNssVASDBEventMonitor |
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82 // Destructor |
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83 // --------------------------------------------------------- |
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84 // |
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85 CNssVASDBEventMonitor::~CNssVASDBEventMonitor() |
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86 { |
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87 Cancel(); |
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88 iNotifier.Close(); |
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89 iDatabase.Close(); |
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90 iDbSession.Close(); |
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91 if ( iObservers ) |
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92 { |
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93 iObservers->Reset(); |
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94 delete iObservers; |
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95 } |
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96 } |
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97 |
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98 |
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99 // --------------------------------------------------------- |
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100 // CNssVASDBEventMonitor::StartMonitoring |
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101 // Request function to start monitoring |
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102 // (other items were commented in a header). |
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103 // --------------------------------------------------------- |
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104 // |
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105 void CNssVASDBEventMonitor::StartMonitoring() |
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106 { |
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107 if ( IsActive() ) |
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108 { |
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109 return; |
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110 } |
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111 iStatus=KRequestPending; |
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112 SetActive(); |
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113 iNotifier.NotifyChange( iStatus ); |
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114 } |
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115 |
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116 |
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117 // --------------------------------------------------------- |
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118 // CNssVASDBEventMonitor::AddObserverL |
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119 // add observer to its list |
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120 // (other items were commented in a header). |
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121 // --------------------------------------------------------- |
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122 // |
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123 void CNssVASDBEventMonitor::AddObserverL(MNssVASDatabaseObserver* aObserver) |
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124 { |
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125 iObservers->AppendL( aObserver ); |
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126 } |
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127 |
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128 |
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129 // --------------------------------------------------------- |
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130 // CNssVASDBEventMonitor::RemoveObserver |
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131 // remove observer from its list |
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132 // (other items were commented in a header). |
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133 // --------------------------------------------------------- |
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134 // |
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135 TInt CNssVASDBEventMonitor::RemoveObserver(MNssVASDatabaseObserver* aObserver) |
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136 { |
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137 TBool ret = EFalse; |
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138 if ( iObservers ) |
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139 { |
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140 for ( TInt i = 0;i < iObservers->Count(); i++ ) |
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141 { |
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142 if ( ( *iObservers )[i] == aObserver ) |
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143 { |
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144 iObservers->Delete( i ); |
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145 ret = ETrue; |
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146 break; |
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147 } |
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148 } |
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149 } |
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150 if ( ret ) |
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151 { |
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152 iObservers->Compress(); |
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153 } |
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154 return ( ret? KErrNone : KErrGeneral ); |
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155 } |
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156 |
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157 |
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158 // --------------------------------------------------------- |
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159 // CNssVASDBEventMonitor::RunL |
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160 // called when standard symbian DBMS events occur |
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161 // (other items were commented in a header). |
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162 // --------------------------------------------------------- |
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163 // |
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164 void CNssVASDBEventMonitor::RunL() |
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165 { |
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166 RDbNotifier::TEvent event = STATIC_CAST( RDbNotifier::TEvent,iStatus.Int() ); |
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167 HandleDatabaseEventL( event ); |
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168 StartMonitoring(); |
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169 } |
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170 |
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171 |
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172 // --------------------------------------------------------- |
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173 // CNssVASDBEventMonitor::DoCancel |
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174 // cancel outstanding requests to RDBNotifier |
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175 // (other items were commented in a header). |
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176 // --------------------------------------------------------- |
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177 // |
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178 void CNssVASDBEventMonitor::DoCancel() |
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179 { |
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180 iNotifier.Cancel(); |
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181 } |
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182 |
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183 |
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184 // --------------------------------------------------------- |
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185 // CNssVASDBEventMonitor::HandleDatabaseEventL |
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186 // Standard Symbian DBMS events handling |
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187 // (other items were commented in a header). |
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188 // --------------------------------------------------------- |
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189 // |
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190 void CNssVASDBEventMonitor::HandleDatabaseEventL( RDbNotifier::TEvent aEvent ) |
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191 { |
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192 if(!iObservers->Count()) |
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193 { |
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194 return; |
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195 } |
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196 |
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197 CNssVASDBEvent::TVASDBEventType type = CNssVASDBEvent::EVASDatabaseEventNull; |
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198 switch( aEvent ) |
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199 { |
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200 case RDbNotifier::EClose: |
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201 type = CNssVASDBEvent::EVASDatabaseEventDatabaseClose; |
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202 break; |
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203 case RDbNotifier::EUnlock: |
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204 type = CNssVASDBEvent::EVASDatabaseEventDatabaseUnlock; |
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205 break; |
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206 case RDbNotifier::ECommit: |
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207 type = CNssVASDBEvent::EVASDatabaseEventDatabaseCommit; |
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208 break; |
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209 case RDbNotifier::ERollback: |
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210 type = CNssVASDBEvent::EVASDatabaseEventDatabaseRollback; |
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211 break; |
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212 case RDbNotifier::ERecover: |
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213 type = CNssVASDBEvent::EVASDatabaseEventDatabaseRecover; |
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214 break; |
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215 default: |
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216 break; |
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217 } |
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218 // for standard symbian DBMS events, the parameter aTag |
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219 // does not have any significance, so create a dummy one |
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220 MNssTag *dummyTag = NULL; |
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221 CNssVASDBEvent *vasDBEvent = CNssVASDBEvent::NewL( type, dummyTag ); |
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222 |
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223 for(TInt i = 0; i < iObservers->Count(); i++) |
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224 { |
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225 ( *iObservers )[i]->HandleVASDBEvent( vasDBEvent ); |
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226 } |
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227 } |
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228 |
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229 |
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230 // --------------------------------------------------------- |
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231 // CNssVASDBEventMonitor::HandleDatabaseEventL() |
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232 // handling of addional events ( tag added, tag deleted, tag changed) |
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233 // wk 15 release has limited functionality where these events can be |
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234 // reported only when the events occur on the same thread as that |
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235 // of the observer (client monitoring the event). |
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236 // (other items were commented in a header). |
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237 // --------------------------------------------------------- |
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238 // |
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239 void CNssVASDBEventMonitor::HandleDatabaseEventL( |
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240 CNssVASDBEvent::TVASDBEventType type, CNssTag *aTag ) |
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241 { |
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242 if ( !iObservers->Count() ) |
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243 { |
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244 return; |
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245 } |
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246 |
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247 for ( TInt i = 0; i < iObservers->Count(); i++ ) |
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248 { |
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249 CNssVASDBEvent *vasDBEvent = CNssVASDBEvent::NewL( type, aTag ); |
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250 ( *iObservers )[i]->HandleVASDBEvent( vasDBEvent ); |
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251 } |
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252 } |
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253 |
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254 // End of File |