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1 // Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include "LogServDatabaseChangeTracker.h" |
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17 #include "LogChangeDefinition.h" |
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18 #include "LogServDatabaseTransactionInterface.h" |
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19 #include "logservpanic.h" |
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20 #include "LogServBackupInterface.h" |
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21 |
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22 // Constants |
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23 const TInt KLogArrayGranularityObservers = 3; |
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24 const TInt KLogArrayGranularityGlobalChanges = 2; |
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25 |
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26 #define UNUSED_VAR(a) a = a |
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27 |
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28 ///////////////////////////////////////////////////////////////////////////////////////// |
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29 // -----> CLogServDatabaseChangeTracker (source) |
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30 ///////////////////////////////////////////////////////////////////////////////////////// |
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31 |
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32 CLogServDatabaseChangeTracker::CLogServDatabaseChangeTracker(MLogServDatabaseTransactionInterface& aDatabase, MLogServBackupInterface& aBackupInterface, TInt aPriority) |
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33 : CActive(aPriority), iDatabase(aDatabase), iBackupInterface(aBackupInterface), iObservers(KLogArrayGranularityObservers), iGlobalChanges(KLogArrayGranularityGlobalChanges) |
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34 { |
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35 CActiveScheduler::Add(this); |
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36 } |
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37 |
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38 CLogServDatabaseChangeTracker::~CLogServDatabaseChangeTracker() |
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39 { |
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40 Cancel(); |
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41 // |
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42 iBackupInterface.BIObserverRemove(*this); |
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43 iNotifier.Close(); |
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44 iObservers.Close(); |
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45 iGlobalChanges.Close(); |
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46 // |
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47 delete iIdler; |
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48 delete iChanges; |
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49 } |
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50 |
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51 void CLogServDatabaseChangeTracker::ConstructL() |
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52 { |
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53 iBackupInterface.BIObserverAddL(*this, MLogServBackupInterface::EObjectChangeTracker); |
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54 iChanges = CLogChangeDefinition::NewL(); |
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55 // |
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56 const TInt error = iNotifier.Open(iDatabase.DTIDatabase()); |
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57 User::LeaveIfError(error); |
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58 // |
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59 Request(); |
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60 // |
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61 iIdler = CIdle::NewL(CActive::EPriorityIdle); |
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62 } |
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63 |
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64 CLogServDatabaseChangeTracker* CLogServDatabaseChangeTracker::NewL(MLogServDatabaseTransactionInterface& aDatabase, MLogServBackupInterface& aBackupInterface, TInt aPriority) |
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65 { |
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66 CLogServDatabaseChangeTracker* self = new(ELeave) CLogServDatabaseChangeTracker(aDatabase, aBackupInterface, aPriority); |
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67 CleanupStack::PushL(self); |
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68 self->ConstructL(); |
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69 CleanupStack::Pop(self); |
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70 return self; |
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71 } |
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72 |
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73 ///////////////////////////////////////////////////////////////////////////////////////// |
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74 ///////////////////////////////////////////////////////////////////////////////////////// |
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75 ///////////////////////////////////////////////////////////////////////////////////////// |
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76 |
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77 void CLogServDatabaseChangeTracker::DCISubmitChangedEventContextL(TLogDatabaseChangeType aType, TLogId aEventId) |
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78 { |
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79 __ASSERT_DEBUG(aType != ELogChangeTypeUndefined, Panic(ELogUnrecognizedChangeType2)); |
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80 iChanges->AddL(aEventId, aType, KErrGeneral); |
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81 } |
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82 |
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83 void CLogServDatabaseChangeTracker::DCISubmitGlobalChangeContextL(TUid aChangeType, TInt aContextParam1, TInt aContextParam2, TInt aContextParam3) |
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84 { |
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85 const TLogServDatabaseChangeDefinition item(aChangeType, aContextParam1, aContextParam2, aContextParam3); |
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86 User::LeaveIfError(iGlobalChanges.Append(item)); |
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87 // |
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88 iIdler->Cancel(); |
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89 iIdler->Start(TCallBack(IdleNotifyGlobalChangeEvents, this)); |
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90 } |
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91 |
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92 void CLogServDatabaseChangeTracker::DCIRequestChangeNotificationsL(MLogServDatabaseChangeObserver& aObserver) |
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93 { |
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94 const TInt error = iObservers.InsertInAddressOrder(&aObserver); |
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95 User::LeaveIfError(error); |
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96 } |
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97 |
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98 void CLogServDatabaseChangeTracker::DCIRequestChangeNotificationsCancel(MLogServDatabaseChangeObserver& aObserver) |
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99 { |
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100 const TInt error = iObservers.FindInAddressOrder(&aObserver); |
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101 if (error >= KErrNone) |
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102 iObservers.Remove(error); |
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103 } |
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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 |
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109 void CLogServDatabaseChangeTracker::BOHandleEventL(TLogServBackupEvent aEvent) |
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110 { |
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111 switch(aEvent) |
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112 { |
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113 case EBackupStarting: |
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114 { |
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115 Cancel(); |
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116 iNotifier.Close(); |
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117 break; |
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118 } |
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119 case EBackupEnded: |
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120 { |
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121 const TInt error = iNotifier.Open(iDatabase.DTIDatabase()); |
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122 User::LeaveIfError(error); |
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123 Request(); |
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124 break; |
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125 } |
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126 default: |
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127 __ASSERT_DEBUG(EFalse, User::Invariant()); |
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128 break; |
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129 } |
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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 ///////////////////////////////////////////////////////////////////////////////////////// |
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135 |
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136 void CLogServDatabaseChangeTracker::RunL() |
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137 { |
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138 // We are only interested if a commit has occurred |
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139 const TInt completionCode = iStatus.Int(); |
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140 if (completionCode == RDbNotifier::ECommit) |
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141 { |
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142 LOGTEXT("CLogServDatabaseChangeTracker::RunL() - database commit"); |
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143 |
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144 // Notify all observers |
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145 NotifyObserversL(); |
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146 |
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147 // Reset changes |
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148 iChanges->Reset(); |
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149 } |
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150 Request(); |
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151 } |
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152 |
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153 void CLogServDatabaseChangeTracker::DoCancel() |
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154 { |
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155 iNotifier.Cancel(); |
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156 } |
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157 |
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158 TInt CLogServDatabaseChangeTracker::RunError(TInt /*aError*/) |
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159 { |
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160 // Ignore errors such as leaves from notifying observers |
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161 Request(); |
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162 return KErrNone; |
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163 } |
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164 |
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165 ///////////////////////////////////////////////////////////////////////////////////////// |
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166 ///////////////////////////////////////////////////////////////////////////////////////// |
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167 ///////////////////////////////////////////////////////////////////////////////////////// |
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168 |
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169 void CLogServDatabaseChangeTracker::Request() |
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170 { |
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171 iNotifier.NotifyChange(iStatus); |
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172 SetActive(); |
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173 } |
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174 |
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175 void CLogServDatabaseChangeTracker::NotifyObserversL() |
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176 { |
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177 LOGTEXT("CLogServDatabaseChangeTracker::NotifyObserversL()"); |
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178 // |
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179 const TInt count = iObservers.Count(); |
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180 for(TInt i=0; i<count; i++) |
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181 { |
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182 MLogServDatabaseChangeObserver* observer = iObservers[i]; |
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183 observer->DCOHandleChangeEventsL(*iChanges); |
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184 } |
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185 |
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186 // Reduce memory usage |
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187 iChanges->Reset(); |
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188 // |
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189 LOGTEXT("CLogServDatabaseChangeTracker::NotifyObserversL() - end"); |
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190 } |
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191 |
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192 void CLogServDatabaseChangeTracker::NotifyGlobalChangeEventsL() |
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193 { |
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194 LOGTEXT("CLogServDatabaseChangeTracker::NotifyGlobalChangeEventsL()"); |
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195 // |
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196 const TInt count = iGlobalChanges.Count(); |
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197 for(TInt i=0; i<count; i++) |
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198 { |
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199 const TLogServDatabaseChangeDefinition& change = iGlobalChanges[i]; |
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200 // |
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201 const TInt observerCount = iObservers.Count(); |
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202 for(TInt j=0; j<observerCount; j++) |
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203 { |
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204 MLogServDatabaseChangeObserver* observer = iObservers[j]; |
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205 observer->DCOHandleGlobalChangeEventL(change); |
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206 } |
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207 } |
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208 |
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209 // Reduce memory usage |
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210 iGlobalChanges.Reset(); |
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211 iGlobalChanges.GranularCompress(); |
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212 // |
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213 LOGTEXT("CLogServDatabaseChangeTracker::NotifyGlobalChangeEventsL() - end"); |
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214 } |
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215 |
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216 TBool CLogServDatabaseChangeTracker::IdleNotifyGlobalChangeEvents(TAny* aSelf) |
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217 { |
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218 CLogServDatabaseChangeTracker* self = reinterpret_cast<CLogServDatabaseChangeTracker*>(aSelf); |
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219 TRAPD(err, self->NotifyGlobalChangeEventsL()); |
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220 UNUSED_VAR(err); |
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221 return EFalse; |
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222 } |