author | Pat Downey <patd@symbian.org> |
Fri, 04 Jun 2010 10:32:16 +0100 | |
changeset 22 | bde600d88860 |
parent 0 | 8e480a14352b |
permissions | -rw-r--r-- |
0
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// Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// |
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//#define __BACKUP_LOGGING |
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|
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#ifdef __BACKUP_LOGGING |
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#define _BACKUPLOG( a ) RFileLogger::WriteFormat(_L("msgs"),_L("backup.txt"),EFileLoggingModeAppend, a ); |
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#define _BACKUPLOGERR( a, b ) RFileLogger::WriteFormat(_L("msgs"),_L("backup.txt"),EFileLoggingModeAppend, a , b); |
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#else |
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#define _BACKUPLOG( a ) |
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#define _BACKUPLOGERR( a, b ) |
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#endif |
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|
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#include "CMsvBackupHandler.h" |
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#include "MSVSERV.H" |
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#include "MSVSTD.H" |
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#include "msvdbadapter.h" |
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#include "msvindexadapter.h" |
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#include <msvapi.h> |
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#include <e32base.h> |
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#include <e32property.h> |
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#include <connect/sbdefs.h> |
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|
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#if (defined SYMBIAN_MESSAGESTORE_UNIT_TESTCODE) |
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_LIT(KDBFileNamePath,"\\messaging.db"); |
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#else |
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_LIT(KDBFileNamePath,"\\private\\10281e17\\[1000484B]messaging.db"); |
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#endif |
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|
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CMsvBackupHandler* CMsvBackupHandler::NewL(CMsvServer& aServer) |
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{ |
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CMsvBackupHandler* self=new (ELeave) CMsvBackupHandler(aServer); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CleanupStack::Pop(self); |
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return(self); |
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} |
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CMsvBackupHandler::CMsvBackupHandler(CMsvServer& aServer) : iServer(aServer) |
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{ |
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} |
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CMsvBackupHandler::~CMsvBackupHandler() |
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{ |
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_BACKUPLOG(_L("backup handler ending\r\n")); |
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// Unregister ourselves with backup server |
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if (iBackup) |
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{ |
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iBackup->DeregisterFile(iFileName); |
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delete iBackup; |
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} |
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} |
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void CMsvBackupHandler::ConstructL() |
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{ |
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_BACKUPLOG(_L("Backup handler started\r\n")) |
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TParse parse; |
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RFs fs; |
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CleanupClosePushL(fs); |
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User::LeaveIfError(fs.Connect()); |
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TPtrC driveName = TDriveUnit(MessageServer::CurrentDriveL(fs)).Name(); |
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iFileName = KDBFileNamePath; |
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parse.Set(iFileName, &driveName, NULL); |
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CleanupStack::PopAndDestroy(); // fs |
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iFileName=parse.FullName(); |
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iState=EHaveLock; |
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|
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// Create backup session |
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iBackup = CBaBackupSessionWrapper::NewL(); |
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|
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// Register with the backup server |
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iBackup->RegisterFileL(iFileName, *this); |
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// All done |
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_BACKUPLOGERR(_L("File Registered with Backup Server: \"%S\"\r\n"), &iFileName); |
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} |
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|
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|
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TBool CMsvBackupHandler::Locked() |
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{ |
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if(iState==EHaveLock) |
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{ |
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return(EFalse); |
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} |
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else |
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{ |
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return(ETrue); |
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} |
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} |
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|
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105 |
#ifdef __BACKUP_LOGGING |
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void CMsvBackupHandler::ChangeFileLockL(const TDesC& aFileAffected, TFileLockFlags aFlags) |
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#else |
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void CMsvBackupHandler::ChangeFileLockL(const TDesC& /*aFileAffected*/, TFileLockFlags aFlags) |
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109 |
#endif |
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110 |
{ |
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111 |
_BACKUPLOG(_L("Got backup event\r\n")) |
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_BACKUPLOGERR(_L("File affected: \"%S\"\r\n"), &aFileAffected); |
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113 |
|
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114 |
switch(aFlags) |
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115 |
{ |
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case ETakeLock: // this state gives me the lock back after it has been taken away from me. |
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117 |
{ |
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_BACKUPLOG(_L("Take lock\r\n")) |
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119 |
if(iState==EReleasedForBackup) |
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120 |
{ |
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121 |
iState=EHaveLock; |
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122 |
_BACKUPLOG(_L("from backup\r\n")) |
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123 |
|
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124 |
|
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125 |
//Change error state to none |
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iServer.Context().IndexAdapter()->SetErrorState(KErrNone); |
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127 |
|
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128 |
//Change State |
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129 |
iServer.SetStartupState(EMsvNullNotification); |
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130 |
|
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131 |
_BACKUPLOG(_L("Reloading context\r\n")) |
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132 |
ReloadContextL(); |
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133 |
} |
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134 |
else if(iState==EReleasedForRestore) |
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135 |
{ |
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136 |
// Reload context will result in this object being deleted |
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137 |
// therefore this is no longer valid; |
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138 |
iState=EHaveLock; |
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139 |
//reload as its a new db after restore |
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140 |
ReloadContextL(); |
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141 |
} |
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142 |
else |
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143 |
{ |
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144 |
_BACKUPLOG(_L("bad state\r\n")) |
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145 |
__ASSERT_DEBUG(EFalse,PanicServer(EMsvBackupHandlerInUnkownState)); |
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146 |
} |
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147 |
break; |
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148 |
} |
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149 |
case EReleaseLockNoAccess: |
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150 |
{ |
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151 |
// please release the lock and don't read or write to the file |
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152 |
_BACKUPLOG(_L("release no access\r\n")) |
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153 |
|
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154 |
// Need to find whether this file lock release request is due to a restore happening. |
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155 |
// It is possible that the file system may need us to release our locks for some other |
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156 |
// purpose such as formatting an MMC card. |
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157 |
TInt backupRestoreState = 0; |
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158 |
|
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159 |
RProperty property; |
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160 |
TInt err = property.Get(KUidSystemCategory, conn::KUidBackupRestoreKey, backupRestoreState); |
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161 |
property.Close(); |
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162 |
User::LeaveIfError(err); |
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|
163 |
|
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164 |
_BACKUPLOGERR(_L("backupRestoreStateValue: \"0x%08x\"\r\n"), backupRestoreState); |
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|
165 |
|
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166 |
if ((backupRestoreState & conn::EBURRestoreFull) || (backupRestoreState & conn::EBURRestorePartial)) |
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|
167 |
{ |
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168 |
// This means they will be restoring the file so I will |
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169 |
// have to cope with a new index when I get the lock back. |
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170 |
if(DetachFromFile(KMsvIndexRestore)!=EFalse) |
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|
171 |
{ |
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172 |
_BACKUPLOG(_L("A genuine restore is happening\r\n")) |
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173 |
iState=EReleasedForRestore; |
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|
174 |
} |
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|
175 |
} |
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176 |
else |
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|
177 |
{ |
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178 |
// Not a restore operation, so no need to reload the index when |
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179 |
// I get the lock back. |
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180 |
// Use KMsvIndexRestore to tell the index not to write anything to disk |
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181 |
// while the file system is locked... |
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182 |
if(DetachFromFile(KMsvIndexRestore)!=EFalse) |
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|
183 |
{ |
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184 |
// ...but use EReleasedForBackup here so that we don't reload the index from disk |
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185 |
// when we get the ETakeLock notification - this would overwrite any index |
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186 |
// changes that have happened while the file system was locked, which we want to |
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187 |
// keep if the file system was locked for any reason other than Restore. |
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|
188 |
_BACKUPLOG(_L("File system detached for read and write, but not for a restore\r\n")) |
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|
189 |
iState=EReleasedForBackup; |
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|
190 |
} |
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|
191 |
} |
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|
192 |
|
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193 |
_BACKUPLOG(_L("released for no access\r\n")) |
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194 |
break; |
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|
195 |
} |
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|
196 |
case EReleaseLockReadOnly: |
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|
197 |
{ |
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198 |
// please release the lock and don't write to the file, I won't read |
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|
199 |
// or write but I also assume the file is being backed up and therefore |
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|
200 |
// the same index will be there when I have finished. |
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|
201 |
_BACKUPLOG(_L("release no read only\r\n")) |
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|
202 |
if(DetachFromFile(KMsvIndexBackup)!=EFalse) |
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|
203 |
{ |
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|
204 |
iState=EReleasedForBackup; |
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|
205 |
} |
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|
206 |
_BACKUPLOG(_L("released for read only\r\n")) |
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|
207 |
break; |
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|
208 |
} |
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default: |
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{ |
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_BACKUPLOG(_L("bad event\r\n")) |
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__ASSERT_DEBUG(EFalse,PanicServer(EMsvBackupObserverGotUnknownEvent)); |
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break; |
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} |
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} |
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}; |
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TBool CMsvBackupHandler::DetachFromFile(TInt aErrorState) |
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{ |
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// if the context is currently in an error state don't do anything, |
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// the current implications of this are that when the disk is removed |
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// or the wrong disk is in the drive and we are asked to release a lock |
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// on the file we won't. |
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_BACKUPLOG(_L("detach to file\r\n")) |
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TInt error = KErrNone; |
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error = iServer.Context().IndexAdapter()->ErrorState(); |
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if(error == KErrNone) |
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{ |
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_BACKUPLOG(_L("context good for closing\r\n")) |
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_BACKUPLOG(_L("closing\r\n")) |
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#if (defined SYMBIAN_MSGS_ENHANCED_REMOVABLE_MEDIA_SUPPORT) |
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TUint currDriveIndex = CMsvPreferredDriveList::GetDriveList()->CurrentDriveIndex(); |
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TDriveNumber currDriveNum = CMsvPreferredDriveList::GetDriveList()->CurrentDriveNumber(); |
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|
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// Flush Cache. This will also detach the DB. |
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TRAP(error, iServer.Context().IndexAdapter()->RemoveDriveL(KCurrentDriveId, currDriveIndex, EFalse)); |
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if(error) |
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return(EFalse); |
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// current drive is detached from DB, so cannot access any entries from Database, so will |
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// assing iDbAdpter pointer to temporary iTempDbAdapter pointer and assin NULL to iDbAdpter. |
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iServer.Context().IndexAdapter()->BackupDbAdpter(); |
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TRAP(error, CMsvPreferredDriveList::GetDriveList()->UpdateDriveIdL(currDriveIndex, KCurrentDriveId)); |
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if(error) |
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return(EFalse); |
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#else |
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iEntry.iSize = iServer.Context().IndexAdapter()->GetDbAdapter()->Size(); |
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iServer.Context().IndexAdapter()->DeleteDbAdapter(); |
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#endif // #if (defined SYMBIAN_MSGS_ENHANCED_REMOVABLE_MEDIA_SUPPORT) |
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_BACKUPLOG(_L("closed\r\n")) |
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iServer.Context().IndexAdapter()->SetErrorState(aErrorState); |
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iServer.SetStartupState(EMsvMediaUnavailable); |
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return(ETrue); |
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} |
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else |
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{ |
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return(EFalse); |
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} |
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} |
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// CreateIndexL will result in this object being deleted |
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// so this is no longer valid |
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void CMsvBackupHandler::ReloadContextL() |
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{ |
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#if (defined SYMBIAN_MSGS_ENHANCED_REMOVABLE_MEDIA_SUPPORT) |
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// for attaching current drive to main Database, assign iDbAdpter with iTempDbAdapter. |
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iServer.Context().IndexAdapter()->RestoreDbAdpter(); |
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iServer.Context().IndexAdapter()->ReloadCacheL(); |
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#else |
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iServer.CreateIndexL(ETrue); |
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#endif |
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} |
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280 |