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1 /* |
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2 * Copyright (c) 2002 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: Implementation of CActiveApDb. |
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15 * |
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16 */ |
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17 |
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18 |
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19 // INCLUDE FILES |
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20 |
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21 #include <ActiveApDb.h> |
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22 #include "ActiveApDbNotifier.h" |
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23 #include <ApEngineConsts.h> |
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24 #include "ApEngineCommons.h" |
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25 #include "ApEngineLogger.h" |
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26 |
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27 const TInt KObserverArrayGranularity = 1; |
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28 |
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29 // ================= MEMBER FUNCTIONS ======================= |
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30 |
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31 // --------------------------------------------------------- |
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32 // CActiveApDb::NewL |
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33 // --------------------------------------------------------- |
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34 // |
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35 EXPORT_C CActiveApDb* CActiveApDb::NewL( TCommDbDatabaseType /*aType*/ ) |
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36 { |
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37 CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::NewL" ) ) ); |
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38 |
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39 CActiveApDb* db = new ( ELeave ) CActiveApDb; |
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40 CleanupStack::PushL( db ); |
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41 db->ConstructL(); |
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42 CleanupStack::Pop( db ); // db |
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43 |
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44 CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::NewL" ) ) ); |
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45 return db; |
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46 } |
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47 |
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48 // --------------------------------------------------------- |
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49 // CActiveApDb::~CActiveApDb |
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50 // --------------------------------------------------------- |
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51 // |
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52 EXPORT_C CActiveApDb::~CActiveApDb() |
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53 { |
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54 CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::~CActiveApDb" ) ) ); |
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55 |
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56 delete iDbNotifier; |
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57 delete iObservers; |
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58 delete iDb; |
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59 |
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60 CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::~CActiveApDb" ) ) ); |
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61 } |
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62 |
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63 |
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64 // --------------------------------------------------------- |
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65 // CActiveApDb::CActiveApDb |
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66 // --------------------------------------------------------- |
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67 // |
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68 CActiveApDb::CActiveApDb() |
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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 // --------------------------------------------------------- |
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74 // CActiveApDb::ConstructL |
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75 // --------------------------------------------------------- |
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76 // |
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77 void CActiveApDb::ConstructL() |
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78 { |
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79 iDb = CCommsDatabase::NewL( ); |
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80 iObservers = new ( ELeave ) CArrayPtrFlat<MActiveApDbObserver> |
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81 ( KObserverArrayGranularity ); |
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82 iDbNotifier = new ( ELeave ) CActiveApDbNotifier( *this ); |
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83 |
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84 iState = EReady; |
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85 } |
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86 |
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87 |
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88 // --------------------------------------------------------- |
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89 // CActiveApDb::AddObserverL |
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90 // --------------------------------------------------------- |
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91 // |
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92 EXPORT_C void CActiveApDb::AddObserverL( MActiveApDbObserver* anObserver ) |
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93 { |
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94 CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::AddObserverL" ) ) ); |
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95 |
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96 if ( !anObserver ) |
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97 { |
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98 User::Leave( KErrNullPointerPassed ); |
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99 } |
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100 iObservers->AppendL( anObserver ); |
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101 iDbNotifier->Start(); |
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102 |
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103 CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::AddObserverL" ) ) ); |
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104 } |
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105 |
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106 |
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107 // --------------------------------------------------------- |
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108 // CActiveApDb::RemoveObserver |
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109 // --------------------------------------------------------- |
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110 // |
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111 EXPORT_C void CActiveApDb::RemoveObserver( MActiveApDbObserver* anObserver ) |
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112 { |
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113 CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::RemoveObserver" ) ) ); |
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114 |
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115 __ASSERT_DEBUG( anObserver, ApCommons::Panic( ENullPointer ) ); |
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116 TInt count = iObservers->Count(); |
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117 for ( TInt i = 0; i < count; i++ ) |
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118 { |
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119 if ( iObservers->At( i ) == anObserver ) |
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120 { |
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121 iObservers->Delete( i ); |
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122 // leave cycle for faster processing, can not return because |
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123 // we may have to stop() if it was the last one... |
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124 break; |
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125 } |
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126 } |
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127 if ( !iObservers->Count() ) |
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128 { // no more observers waiting so stop notification... |
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129 iDbNotifier->Stop(); |
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130 } |
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131 // for some reason, observer was not found-> |
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132 // Someone has already removed it |
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133 // simply ignore it |
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134 CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::RemoveObserver" ) ) ); |
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135 |
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136 } |
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137 |
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138 |
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139 // --------------------------------------------------------- |
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140 // CActiveApDb::Database |
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141 // --------------------------------------------------------- |
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142 // |
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143 EXPORT_C CCommsDatabase* CActiveApDb::Database() |
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144 { |
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145 CLOG( ( EActiveDb, 0, _L( "<-> CActiveApDb::Database" ) ) ); |
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146 |
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147 return iDb; |
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148 } |
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149 |
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150 // --------------------------------------------------------- |
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151 // CActiveApDb::HandleDbEventL |
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152 // --------------------------------------------------------- |
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153 // |
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154 void CActiveApDb::HandleDbEventL( TInt anEvent ) |
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155 { |
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156 CLOG( ( EActiveDb, 0, _L( "-> CActiveApDb::HandleDbEventL" ) ) ); |
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157 |
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158 // possible events: EClose,EUnlock,ECommit,ERollback,ERecover |
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159 switch ( anEvent ) |
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160 { |
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161 case RDbNotifier::EUnlock: |
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162 { |
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163 CLOG( ( EActiveDb, 2, _L( "Notifier Unlock" ) ) ); |
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164 NotifyObserversL( MActiveApDbObserver::EDbAvailable ); |
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165 break; |
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166 } |
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167 case RDbNotifier::ECommit: |
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168 { |
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169 CLOG( ( EActiveDb, 2, _L( "Notifier Commit" ) ) ); |
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170 NotifyObserversL( MActiveApDbObserver::EDbChanged ); |
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171 break; |
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172 } |
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173 case RDbNotifier::EClose: |
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174 { |
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175 CLOG( ( EActiveDb, 2, _L( "Notifier Close/Rollbac/Recover" ) ) ); |
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176 NotifyObserversL( MActiveApDbObserver::EDbClosing ); |
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177 // Use base class' method to keep the notifier alive. |
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178 // We need to know when all clients has released the db. |
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179 break; |
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180 } |
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181 case RDbNotifier::ERollback: |
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182 { |
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183 CLOG( ( EActiveDb, 2, _L( "Notifier Close/Rollbac/Recover" ) ) ); |
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184 NotifyObserversL( MActiveApDbObserver::EDbAvailable ); |
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185 break; |
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186 } |
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187 case RDbNotifier::ERecover: |
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188 { |
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189 CLOG( ( EActiveDb, 2, _L( "Notifier Close/Rollbac/Recover" ) ) ); |
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190 NotifyObserversL( MActiveApDbObserver::EDbClosing ); |
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191 // Use base class' method to keep the notifier alive. |
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192 // We need to know when all clients has released the db. |
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193 break; |
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194 } |
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195 default: |
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196 { |
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197 // Don't know what's happened, but instead of |
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198 // Panicking, it's better to 'simulate' a change. |
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199 // 'Defensive' programming. |
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200 CLOG( ( EActiveDb, 2, _L( "Notifier UNKNOWN" ) ) ); |
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201 NotifyObserversL( MActiveApDbObserver::EDbChanged ); |
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202 break; |
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203 } |
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204 } |
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205 CLOG( ( EActiveDb, 1, _L( "<- CActiveApDb::HandleDbEventL" ) ) ); |
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206 |
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207 } |
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208 |
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209 |
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210 |
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211 |
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212 // --------------------------------------------------------- |
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213 // CActiveApDb::NotifyObserversL |
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214 // --------------------------------------------------------- |
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215 // |
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216 void CActiveApDb::NotifyObserversL( MActiveApDbObserver::TEvent anEvent ) |
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217 { |
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218 |
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219 TInt i; |
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220 TInt count = iObservers->Count(); |
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221 // one hazard is that if one client leaves, |
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222 // the rest of the clients will not be notified this time... |
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223 for ( i = 0; i < count; i++ ) |
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224 { |
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225 TRAP_IGNORE( iObservers->At( i )->HandleApDbEventL( anEvent ) ); |
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226 } |
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227 } |
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228 |
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229 // End of File |