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1 /** |
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2 * Copyright (c) 2004-2009 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.symbianfoundation.org/legal/licencesv10.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: |
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15 * Declaration of MActiveBackupDataClient and CActiveBackupClient |
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16 * |
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17 * |
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18 */ |
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19 |
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20 |
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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 @file |
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26 @released |
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27 */ |
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28 #ifndef __ACTIVEBACKUPCLIENT_H__ |
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29 #define __ACTIVEBACKUPCLIENT_H__ |
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30 |
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31 #include <e32base.h> |
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32 #include <f32file.h> |
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33 #include <e32cmn.h> |
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34 #include <connect/sbdefs.h> |
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35 |
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36 namespace conn |
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37 { |
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38 |
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39 class MActiveBackupDataClient |
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40 /** |
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41 MActiveBackupDataClient is a Mixin to be implemented by an Active Backup client. |
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42 The client connects to the Secure Backup Server using the CActiveBackupClient |
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43 class and provides an instance of MActiveBackupDataClient to be called for a |
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44 range of functions. |
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45 |
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46 The bulk transfer of data and snapshots is expected to be by means of shared |
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47 heaps for performance reasons so the API is expected to change in these areas. |
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48 |
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49 @released |
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50 @publishedAll |
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51 */ |
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52 { |
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53 public: |
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54 |
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55 /** |
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56 Empty virtual destructor to avoid memory leaks |
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57 */ |
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58 virtual ~MActiveBackupDataClient() {} |
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59 |
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60 ///// Backup Methods ///// |
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61 |
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62 /** |
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63 This method informs the active backup data client that all snapshots have |
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64 been supplied. If the client has not received a snapshot then it should |
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65 perform a base backup. |
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66 */ |
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67 virtual void AllSnapshotsSuppliedL() = 0; |
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68 |
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69 /** |
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70 This method receives all or part of a snapshot of data to allow calculation of an |
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71 incremental backup. The snapshot is one that was previously supplied by the data |
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72 owner. The snapshot data should be read from the location supplied. |
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73 The snapshot data may be larger than the location supplied in which case the routine will |
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74 be called repeatedly until all data has been supplied. |
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75 |
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76 Snapshot data will also be supplied as part of a restore operation. |
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77 |
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78 @param aDrive the drive being backed up |
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79 @param aBuffer a pointer to the base of the location from whence data can be copied. |
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80 @param aLastSection ETrue if this is the last section of snapshot data, else EFalse. |
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81 @leave KErrNotSupported if the data owner does not support incremental backups. |
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82 */ |
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83 virtual void ReceiveSnapshotDataL(TDriveNumber aDrive, TDesC8& aBuffer, TBool aLastSection) = 0; |
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84 |
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85 /** |
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86 This method returns the expected size of backup data that will be supplied. If an |
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87 incremental backup is underway then this method will not be called until after |
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88 ReceiveSnapshotDataL(). The size data will be used for the purpose of tracking progess |
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89 during a backup. If it is inaccurate then the user may see irregular progress but the |
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90 actual backup data will not be affected so it is acceptable to return an estimated |
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91 value. |
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92 |
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93 @param aDrive the drive being backed up. |
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94 @return the size of the data that will be returned |
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95 */ |
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96 virtual TUint GetExpectedDataSize(TDriveNumber aDrive) = 0; |
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97 |
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98 /** |
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99 This method returns a snapshot of data to accompany a backup. The snapshot is expected |
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100 to contain details on files / data being backed up. The format of the snapshot is only |
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101 meaningful to the data owner. The snapshot will be supplied if the data owner is asked |
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102 for an incremental backup and for a restore operation. The snapshot data should be |
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103 copied to the location supplied. |
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104 The snapshot data may be larger than the location supplied in which case the routine will |
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105 be called repeatedly until all data has been retrieved. |
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106 |
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107 @param aDrive the drive being backed up |
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108 @param aBuffer a pointer to the base of the location where data can be copied. |
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109 @param aFinished on return ETrue if all data has been returned for this drive, else EFalse. |
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110 @leave KErrNotSupported if the data owner does not support incremental backups. |
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111 */ |
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112 virtual void GetSnapshotDataL(TDriveNumber aDrive, TPtr8& aBuffer, TBool& aFinished) = 0; |
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113 |
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114 /** |
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115 This method prepares the implementor to return backup data. It will be followed by a |
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116 sequence of calls to request the actual data. |
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117 |
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118 @param aDrive the drive being backed up. |
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119 */ |
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120 virtual void InitialiseGetBackupDataL(TDriveNumber aDrive) = 0; |
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121 |
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122 /** |
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123 This method requests a section of backup data. InitialiseGetBackupDataL() will have been |
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124 called prevously to specify the drive concerned. The data returned may be base or |
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125 incremental depending on the type of backup and the capability of the data owner. |
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126 |
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127 @param aBuffer a pointer to the base of the location where data can be copied. |
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128 @param aFinished on return ETrue if all data has been returned for this drive, else EFalse. |
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129 */ |
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130 virtual void GetBackupDataSectionL(TPtr8& aBuffer, TBool& aFinished) = 0; |
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131 |
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132 ///// Restore Methods ///// |
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133 |
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134 /** |
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135 This method prepares the implementor to receive base restore data for a drive. |
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136 It will be followed by a sequence of calls to supply the actual data. |
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137 |
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138 @param aDrive the drive being restored. |
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139 */ |
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140 virtual void InitialiseRestoreBaseDataL(TDriveNumber aDrive) = 0; |
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141 |
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142 /** |
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143 This method receives a section of base restore data. |
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144 InitialiseRestoreBaseDataL() will have been called prevously to specify the drive concerned. |
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145 |
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146 @param aBuffer a pointer to the base of the location whence data can be read. |
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147 @param aFinished ETrue if all data has been returned for this drive, else EFalse. |
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148 */ |
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149 virtual void RestoreBaseDataSectionL(TDesC8& aBuffer, TBool aFinished) = 0; |
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150 |
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151 /** |
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152 This method prepares the implementor to receive incremental restore data for a drive. |
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153 It will be followed by a sequence of calls to supply the actual data. If multiple |
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154 increments are supplied then this methid will be called before each increment. |
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155 |
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156 @param aDrive the drive being restored. |
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157 */ |
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158 virtual void InitialiseRestoreIncrementDataL(TDriveNumber aDrive) = 0; |
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159 |
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160 /** |
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161 This method receives a section of increment restore data. |
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162 InitialiseRestoreIncrementDataL() will have been called prevously to specify the |
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163 drive concerned. |
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164 |
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165 @param aBuffer a pointer to the base of the location whence data can be read. |
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166 @param aFinished ETrue if all data has been returned for this increment, else EFalse. |
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167 */ |
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168 virtual void RestoreIncrementDataSectionL(TDesC8& aBuffer, TBool aFinished) = 0; |
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169 |
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170 /** |
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171 This method is called when all data to be restored has been supplied. |
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172 |
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173 @param aDrive the drive being restored. |
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174 */ |
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175 virtual void RestoreComplete(TDriveNumber aDrive) = 0; |
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176 |
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177 /** |
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178 This method prepares the implementor to return backup data on behalf of another data owner. |
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179 It will be followed by a sequence of calls to request the actual data. This method is only |
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180 for use by a proxy data manager that backs up data on behalf of other data owners. There |
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181 is no corresponding method for snapshots as it is assumed that a proxy data manager will |
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182 only handle base data. |
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183 |
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184 @param aSID the data owner whose data is to be backed up |
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185 @param aDrive the drive being backed up. |
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186 */ |
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187 virtual void InitialiseGetProxyBackupDataL(TSecureId aSID, TDriveNumber aDrive); |
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188 |
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189 /** |
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190 This method prepares the implementor to receive base restore data for another data owner |
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191 for a drive. It will be followed by a sequence of calls to supply the actual data. |
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192 This method is only for use by a proxy data manager that restores up data on behalf of |
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193 other data owners. There is no corresponding method for incremental data as it is assumed |
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194 that a proxy data manager will only handle base data. |
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195 |
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196 @param aSID the data owner whose data is to be restored |
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197 @param aDrive the drive being restored. |
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198 */ |
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199 virtual void InitialiseRestoreProxyBaseDataL(TSecureId aSID, TDriveNumber aDrive); |
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200 |
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201 ///// General Methods ///// |
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202 |
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203 /** |
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204 This method is called if copying of data is terminated prematurely to allow the |
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205 implementor to tidy up. The same method applies to all types of data and to backup |
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206 and restore |
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207 */ |
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208 virtual void TerminateMultiStageOperation() = 0; |
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209 |
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210 /** |
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211 Gets an extended interface based on a supplied uid. |
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212 |
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213 @param aUid Uid which identifies an extended interface |
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214 @return Pointer to an extended interface |
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215 */ |
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216 virtual TAny* GetExtendedInterface(const TInt32 aUid); |
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217 |
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218 ///// Test Methods ///// |
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219 /** |
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220 Gets a 32-bit checksum for its private data. |
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221 This routine is for test purposes. It must be implemented but an invariant checksum |
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222 value can be provided. Some tests may cause checksum values to be compared. |
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223 |
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224 @param aDrive the drive containing data being checksummed |
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225 @return the 32-bit checksum |
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226 */ |
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227 virtual TUint GetDataChecksum(TDriveNumber aDrive) = 0; |
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228 }; |
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229 |
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230 inline void MActiveBackupDataClient::InitialiseGetProxyBackupDataL(TSecureId /*aSID*/, TDriveNumber /*aDrive*/) |
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231 /** Initialises the proxy backup data |
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232 |
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233 This is not supported here. |
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234 |
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235 @param aSID the secure Id |
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236 @param aDrive the driver number |
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237 @leave KErrNotSupported Always. |
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238 */ |
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239 { |
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240 User::Leave(KErrNotSupported); |
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241 } |
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242 |
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243 inline void MActiveBackupDataClient::InitialiseRestoreProxyBaseDataL(TSecureId /*aSID*/, TDriveNumber /*aDrive*/) |
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244 { |
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245 /** Initialises the proxy backup base data |
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246 |
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247 This is not supported here. |
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248 |
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249 @param aSID the secure Id |
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250 @param aDrive the driver number |
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251 @leave KErrNotSupported Always. |
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252 */ |
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253 User::Leave(KErrNotSupported); |
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254 } |
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255 |
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256 inline TAny* MActiveBackupDataClient::GetExtendedInterface(const TInt32 /*aUid*/) |
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257 { |
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258 return NULL; |
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259 } |
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260 |
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261 |
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262 class RABClientSession; |
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263 class CActiveBackupCallbackHandler; |
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264 |
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265 class CActiveBackupClient : public CBase |
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266 /** |
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267 CActiveBackupClient provides a connection to the Secure Backup Server for a data owning |
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268 process. |
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269 |
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270 It can be used to obtain information about an active backup or restore operation. |
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271 It can also be used to signal to the Secure Backup Server when the data owner is ready |
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272 for backup or restore. |
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273 |
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274 It is also used by data owners that implement active backup or restore to provide a |
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275 MActiveBackupDataClient implementation. |
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276 |
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277 This class owns a RActiveBackupSessionImpl instance and publishes the |
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278 public API to the outside world. The reason for this facade class is twofold: |
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279 |
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280 @li Hiding the implementation details of RActiveBackupSessionImpl |
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281 |
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282 @li Future binary compatibility |
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283 |
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284 @released |
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285 @publishedAll |
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286 */ |
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287 { |
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288 public: |
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289 IMPORT_C static CActiveBackupClient* NewL(); |
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290 |
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291 IMPORT_C static CActiveBackupClient* NewL(MActiveBackupDataClient* aClient); |
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292 IMPORT_C ~CActiveBackupClient(); |
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293 IMPORT_C void BURModeInfoL(TDriveList& aDriveList, TBURPartType& aBackupType, TBackupIncType& aIncBackupType); |
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294 IMPORT_C TBool DoesPartialBURAffectMeL(); |
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295 IMPORT_C void ConfirmReadyForBURL(TInt aErrorCode); |
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296 |
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297 private: |
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298 CActiveBackupClient(); |
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299 void ConstructL(); |
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300 void ConstructL(MActiveBackupDataClient* aClient); |
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301 |
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302 private: |
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303 /** Pointer to the client session R class that's wrapped up by this class */ |
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304 RABClientSession* iClientSession; |
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305 |
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306 /** Pointer to the Active Backup Callback Handler */ |
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307 CActiveBackupCallbackHandler* iABCallbackHandler; |
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308 }; |
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309 |
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310 } // end namespace |
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311 |
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312 #endif // __ACTIVEBACKUPCLIENT_H__ |