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1 /* |
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2 * Copyright (c) 2007-2009 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 "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: |
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15 * Implements a writable interface for UPS Database. |
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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 @file |
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22 @internalTechnology |
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23 @prototype |
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24 */ |
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25 |
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26 #include "upsdbw.h" |
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27 #include "upscommon.h" |
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28 |
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29 using namespace UserPromptService; |
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30 |
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31 CDecisionDbW::CDecisionDbW() |
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32 /** |
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33 Constructor for writable decision database object |
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34 */ |
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35 { |
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36 |
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37 } |
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38 |
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39 |
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40 CDecisionDbW::~CDecisionDbW() |
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41 /** |
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42 Destructor for writable decision database object |
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43 */ |
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44 { |
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45 iDatabase.Close(); |
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46 delete iDbName; |
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47 delete iStore; |
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48 } |
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49 |
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50 |
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51 EXPORT_C CDecisionDbW* CDecisionDbW::NewL(const TDesC& aDbName, RFs& aFs) |
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52 /** |
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53 Creates a writable decision database object and connects to the database. |
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54 If the database does not exist or is corrupted, a new decision database is created. |
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55 The function leaves, if creation of the object or connection to the database fail. |
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56 |
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57 @param aDbName The path of the decision database |
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58 @param aFs Handle to the file server session |
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59 |
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60 @return A pointer to the newly allocated database object, if creation and connection are successful. |
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61 */ |
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62 { |
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63 CDecisionDbW* self = CDecisionDbW::NewLC(aDbName, aFs); |
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64 CleanupStack::Pop(self); |
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65 return self; |
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66 } |
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67 |
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68 |
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69 EXPORT_C CDecisionDbW* CDecisionDbW::NewLC(const TDesC& aDbName, RFs& aFs) |
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70 /** |
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71 Creates a writable decision database object and connects to the database. |
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72 If the database does not exist or is corrupted, a new decision database is created. |
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73 The function leaves, if creation of the object or connection to the database fail. |
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74 |
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75 @param aDbName The path of the decision database |
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76 param aFs Handle to the file server session |
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77 |
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78 @return A pointer to the newly allocated database object, if creation and connection |
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79 are successful. The pointer is also put onto the cleanup stack. |
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80 */ |
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81 { |
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82 CDecisionDbW* self = new (ELeave) CDecisionDbW(); |
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83 CleanupStack::PushL(self); |
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84 self->ConstructL(aDbName, aFs); |
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85 return self; |
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86 } |
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87 |
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88 |
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89 void CDecisionDbW::ConstructL(const TDesC& aDbName, RFs& aFs) |
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90 /** |
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91 Second phase constructor for the decision database object. Connects to the decision database. |
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92 If the database does not existed or is corrupted, creates a new one. The function leaves, |
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93 if both database connection and creation fail. |
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94 |
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95 @param aDbName The path of the decision database |
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96 @param aFs Handle to the file server session |
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97 */ |
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98 { |
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99 //Construct the name of UPS decision database |
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100 iDbName = aDbName.AllocL(); |
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101 |
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102 //First try to open the decision database |
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103 TRAPD(error,OpenDatabaseL(aFs)); |
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104 |
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105 if((error == KErrNoMemory) || (error == KErrDiskFull)) |
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106 { |
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107 User::Leave(error); |
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108 } |
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109 |
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110 // Makes sure that DB file is writable. (DEF122590) |
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111 aFs.SetAtt(iDbName->Des(),0, KEntryAttReadOnly); |
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112 |
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113 if(error != KErrNone) |
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114 { |
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115 DEBUG_PRINTF2(_L("%S database file does not exist or is corrupted."), iDbName); |
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116 //The decision database does not exist or is corrupted, create a new one |
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117 CreateDatabaseL(aFs); |
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118 |
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119 //Create a decision table in the decision database |
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120 CreateTableL(); |
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121 |
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122 //Create an index on the decision table |
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123 CreateIndexL(); |
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124 } |
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125 } |
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126 |
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127 |
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128 void CDecisionDbW::OpenDatabaseL(RFs& aFs) |
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129 /** |
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130 Opens the decision database. |
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131 @param aFs Handle to the file server session |
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132 */ |
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133 { |
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134 DEBUG_PRINTF2(_L("%S database file is being opened."), iDbName); |
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135 |
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136 iStore = CPermanentFileStore::OpenL(aFs, *iDbName, EFileRead|EFileWrite); |
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137 iDatabase.OpenL(iStore, iStore->Root()); |
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138 |
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139 //Database does exist. However, make sure that the decision table also exists |
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140 CDbTableNames *tables = iDatabase.TableNamesL(); |
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141 CleanupStack::PushL(tables); |
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142 if(1 != tables->Count()) |
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143 { |
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144 DEBUG_PRINTF(_L("The decision table could not be found in the database file!")); |
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145 User::Leave(KErrNotFound); |
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146 } |
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147 CleanupStack::PopAndDestroy(tables); |
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148 |
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149 //OK. The decision table does exist. What about the decision index? |
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150 CDbIndexNames *indexes = iDatabase.IndexNamesL(KDecisionTable); |
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151 CleanupStack::PushL(indexes); |
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152 if(2 != indexes->Count()) |
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153 { |
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154 DEBUG_PRINTF(_L("The index on the decision table is missing!")); |
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155 User::Leave(KErrNotFound); |
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156 } |
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157 CleanupStack::PopAndDestroy(indexes); |
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158 |
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159 if(iDatabase.IsDamaged()) |
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160 { |
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161 User::LeaveIfError(iDatabase.Recover()); |
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162 } |
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163 |
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164 DEBUG_PRINTF2(_L("%S database file has been opened successfully."), iDbName); |
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165 } |
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166 |
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167 |
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168 void CDecisionDbW::CreateDatabaseL(RFs& aFs) |
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169 /** |
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170 Creates a new, empty store database. |
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171 @param aFs Handle to the file server session |
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172 */ |
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173 { |
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174 DEBUG_PRINTF2(_L("%S database is being created."), iDbName); |
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175 |
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176 if(iStore) |
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177 {//if database file exists but the table does not, iStore has already been allocated. |
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178 delete iStore; |
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179 iStore = 0; |
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180 iDatabase.Close(); |
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181 } |
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182 |
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183 //Create a file store |
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184 iStore = CPermanentFileStore::ReplaceL(aFs, *iDbName, EFileRead|EFileWrite); |
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185 iStore->SetTypeL(iStore->Layout()); |
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186 |
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187 //Create UPS Decision Database in the file store |
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188 TStreamId sId = iDatabase.CreateL(iStore); |
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189 iStore->SetRootL(sId); |
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190 |
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191 //Commit the database creation |
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192 iStore->CommitL(); |
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193 |
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194 DEBUG_PRINTF2(_L("%S database has been created successfully."), iDbName); |
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195 } |
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196 |
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197 |
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198 void CDecisionDbW::CreateTableL() |
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199 /** |
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200 Creates the decision table in the decision database. |
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201 */ |
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202 { |
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203 DEBUG_PRINTF(_L("The Ups decision table is being created.")); |
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204 |
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205 // Create a table definition |
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206 CDbColSet* columns=CDbColSet::NewLC(); |
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207 |
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208 // add the columns to the definition |
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209 TDbCol clientSid(KColClientSid,EDbColUint32); |
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210 clientSid.iAttributes = TDbCol::ENotNull; |
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211 columns->AddL(clientSid); |
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212 |
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213 TDbCol evaluatorId(KColEvaluatorId,EDbColUint32); |
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214 evaluatorId.iAttributes = TDbCol::ENotNull; |
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215 columns->AddL(evaluatorId); |
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216 |
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217 TDbCol serviceId(KColServiceId,EDbColUint32); |
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218 serviceId.iAttributes=TDbCol::ENotNull; |
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219 columns->AddL(serviceId); |
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220 |
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221 TDbCol serverSid(KColServerSid,EDbColUint32); |
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222 serverSid.iAttributes=TDbCol::ENotNull; |
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223 columns->AddL(serverSid); |
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224 |
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225 TDbCol fingerprint(KColFingerprint,EDbColText8,KUpsMaxFingerprintLength ); |
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226 columns->AddL(fingerprint); |
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227 |
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228 TDbCol clientEntity(KColClientEntity,EDbColText8,KUpsMaxClientEntityLength); |
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229 columns->AddL(clientEntity); |
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230 |
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231 TDbCol description(KColDescription,EDbColLongText); |
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232 columns->AddL(description); |
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233 |
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234 TDbCol result(KColResult,EDbColInt8); |
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235 result.iAttributes=TDbCol::ENotNull; |
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236 columns->AddL(result); |
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237 |
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238 TDbCol evaluatorInfo(KColEvaluatorInfo,EDbColUint32); |
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239 columns->AddL(evaluatorInfo); |
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240 |
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241 TDbCol policyVersion(KColMajorPolicyVersion,EDbColUint16); |
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242 policyVersion.iAttributes=TDbCol::ENotNull; |
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243 columns->AddL(policyVersion); |
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244 |
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245 TDbCol recordId(KColRecordId,EDbColUint32); |
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246 recordId.iAttributes=TDbCol::ENotNull|TDbCol::EAutoIncrement; |
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247 columns->AddL(recordId); |
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248 |
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249 // Create a table with the table definition |
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250 User::LeaveIfError(iDatabase.CreateTable(KDecisionTable,*columns)); |
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251 |
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252 // cleanup the column set |
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253 CleanupStack::PopAndDestroy(columns); |
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254 |
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255 DEBUG_PRINTF(_L("The Ups decision table has been created successfully.")); |
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256 } |
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257 |
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258 |
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259 void CDecisionDbW::CreateIndexL() |
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260 /** |
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261 Creates an index on the decision table and makes it unique. |
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262 */ |
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263 { |
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264 DEBUG_PRINTF(_L("The Ups decision index is being created on the decision table.")); |
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265 |
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266 // create the index key |
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267 CDbKey* key=CDbKey::NewLC(); |
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268 |
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269 // add the key columns |
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270 key->AddL(TDbKeyCol(KColClientSid)); |
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271 key->AddL(TDbKeyCol(KColEvaluatorId)); |
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272 key->AddL(TDbKeyCol(KColServiceId)); |
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273 key->AddL(TDbKeyCol(KColServerSid)); |
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274 key->AddL(TDbKeyCol(KColFingerprint)); |
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275 key->AddL(TDbKeyCol(KColClientEntity)); |
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276 key->AddL(TDbKeyCol(KColMajorPolicyVersion)); |
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277 |
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278 //Make the index key unique |
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279 key->MakeUnique(); |
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280 |
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281 // create the primary index |
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282 User::LeaveIfError(iDatabase.CreateIndex(KPrimaryIndex,KDecisionTable,*key)); |
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283 |
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284 //Now create the second index on the record id |
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285 key->Clear(); |
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286 // add the record id column |
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287 key->AddL(TDbKeyCol(KColRecordId)); |
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288 key->MakeUnique(); |
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289 |
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290 // create the record id index |
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291 User::LeaveIfError(iDatabase.CreateIndex(KRecordIdIndex,KDecisionTable,*key)); |
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292 |
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293 // cleanup the key |
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294 CleanupStack::PopAndDestroy(key); |
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295 |
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296 DEBUG_PRINTF(_L("The Ups decision index has been created successfully.")); |
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297 } |
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298 |
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299 |
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300 EXPORT_C void CDecisionDbW::DeleteDatabaseL(RFs& aFs) |
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301 /** |
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302 Delete the decision database completely. |
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303 @param aFs Handle to the file server session |
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304 */ |
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305 { |
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306 DEBUG_PRINTF2(_L("%S database is being deleted."),iDbName); |
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307 |
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308 iDatabase.Close(); |
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309 delete iStore; |
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310 iStore = 0; |
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311 User::LeaveIfError(aFs.Delete(*iDbName)); |
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312 |
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313 DEBUG_PRINTF2(_L("%S database has been deleted successfully."),iDbName); |
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314 } |
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315 |
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316 |
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317 void CDecisionDbW::UpdateCurrentRowL(RDbTable& aTable, CDecisionRecord& aRecord) |
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318 /** |
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319 Updates the current row of the rowset by using the values the provided decision record. |
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320 |
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321 @param aTable A table object which provides access to table data as a rowset. |
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322 @param aRecord A decision record object used to update the current row. |
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323 */ |
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324 { |
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325 //Use CDbColSet to set fields |
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326 CDbColSet* colSet = aTable.ColSetL(); |
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327 CleanupStack::PushL(colSet); |
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328 |
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329 //Set the fields of the empty row |
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330 aTable.SetColL(colSet->ColNo(KColClientSid) ,(TUint32)aRecord.iClientSid.iId); |
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331 aTable.SetColL(colSet->ColNo(KColEvaluatorId),(TUint32)aRecord.iEvaluatorId.iUid); |
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332 aTable.SetColL(colSet->ColNo(KColServiceId) ,(TUint32)aRecord.iServiceId.iUid); |
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333 aTable.SetColL(colSet->ColNo(KColServerSid) ,(TUint32)aRecord.iServerSid.iId); |
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334 |
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335 //Fingerprint may be null |
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336 if(aRecord.iFingerprint.Length() != 0) |
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337 { |
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338 aTable.SetColL(colSet->ColNo(KColFingerprint),aRecord.iFingerprint); |
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339 } |
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340 |
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341 //ClientEntity may be null |
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342 if(aRecord.iClientEntity.Length() != 0) |
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343 { |
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344 aTable.SetColL(colSet->ColNo(KColClientEntity),aRecord.iClientEntity); |
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345 } |
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346 |
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347 //Description may be null |
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348 if(aRecord.iDescription.Length() != 0) |
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349 { |
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350 //A long column is written by using an RDbColStream |
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351 RDbColWriteStream str; |
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352 TDbColNo col = colSet->ColNo(KColDescription); |
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353 |
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354 str.OpenLC(aTable,col); |
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355 str.WriteL(aRecord.iDescription); |
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356 str.Close(); |
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357 |
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358 CleanupStack::PopAndDestroy(&str); |
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359 } |
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360 |
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361 aTable.SetColL(colSet->ColNo(KColResult),aRecord.iResult); |
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362 aTable.SetColL(colSet->ColNo(KColEvaluatorInfo),(TUint32)aRecord.iEvaluatorInfo); |
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363 aTable.SetColL(colSet->ColNo(KColMajorPolicyVersion),aRecord.iMajorPolicyVersion); |
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364 |
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365 CleanupStack::PopAndDestroy(colSet); |
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366 } |
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367 |
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368 |
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369 EXPORT_C void CDecisionDbW::CreateDecisionL(CDecisionRecord& aRecord) |
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370 /** |
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371 Inserts a new decision record into the decision database. |
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372 |
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373 @param aRecord A new decision record |
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374 */ |
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375 { |
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376 //Create a database table object |
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377 RDbTable dbTable; |
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378 User::LeaveIfError(dbTable.Open(iDatabase,KDecisionTable,dbTable.EInsertOnly)); |
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379 CleanupClosePushL(dbTable); |
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380 |
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381 //Set the rowset cursor to the beginning position |
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382 dbTable.Reset(); |
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383 |
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384 //Insert an empty row into the table |
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385 dbTable.InsertL(); |
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386 |
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387 //Set the fields of newly inserted row |
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388 UpdateCurrentRowL(dbTable, aRecord); |
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389 |
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390 //Complete insertion |
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391 dbTable.PutL(); |
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392 |
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393 CleanupStack::Pop(&dbTable); |
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394 //Close the rowset |
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395 dbTable.Close(); |
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396 } |
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397 |
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398 |
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399 void CDecisionDbW::PrepareForSearchL(RDbTable& aTable, CDecisionFilter& aFilter, TDbSeekMultiKey<KIndexColumnNumber>& aSeekKey) |
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400 /** |
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401 Opens the provided table object on the decision database and sets the decision index |
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402 as the active index for this table. If successful, the rowset is reset to the beginning. |
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403 |
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404 @param aTable A table object which provides access to table data as a rowset. |
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405 @param aFilter A filter object which is used to set the decision index. |
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406 @return The key value to lookup in the index. |
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407 */ |
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408 { |
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409 User::LeaveIfError(aTable.Open(iDatabase, KDecisionTable, aTable.EUpdatable)); |
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410 |
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411 TUint16 flags = KSetClientSid|KSetEvaluatorId|KSetServiceId|KSetServerSid|KSetFingerprint|KSetClientEntity|KSetMajorPolicyVersion; |
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412 |
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413 TUint16 combinedFlags = (0x00FF) & (aFilter.iSetFlag[KPosClientSid] | aFilter.iSetFlag[KPosEvaluatorId] | |
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414 aFilter.iSetFlag[KPosServiceId] | aFilter.iSetFlag[KPosServerSid] | |
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415 aFilter.iSetFlag[KPosFingerprint] | aFilter.iSetFlag[KPosClientEntity]| |
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416 aFilter.iSetFlag[KPosMajorPolicyVersion]); |
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417 |
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418 //If any of these flags is not set, do not continue |
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419 if ((combinedFlags & flags) != flags) |
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420 { |
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421 DEBUG_PRINTF(_L("The provided filter does not have all required keys to look up a decision.")); |
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422 User::Leave(KErrUpsMissingArgument); |
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423 } |
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424 |
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425 aSeekKey.Add((TUint)aFilter.iClientSid.iId); |
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426 aSeekKey.Add((TUint)aFilter.iEvaluatorId.iUid); |
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427 aSeekKey.Add((TUint)aFilter.iServiceId.iUid); |
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428 aSeekKey.Add((TUint)aFilter.iServerSid.iId); |
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429 aSeekKey.Add(*aFilter.iFingerprint); |
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430 aSeekKey.Add(*aFilter.iClientEntity); |
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431 aSeekKey.Add(aFilter.iMajorPolicyVersion); |
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432 |
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433 //Set the primary index |
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434 User::LeaveIfError(aTable.SetIndex(KPrimaryIndex)); |
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435 |
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436 } |
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437 |
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438 |
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439 EXPORT_C CDecisionRecord* CDecisionDbW::GetDecisionL(CDecisionFilter& aFilter) |
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440 /** |
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441 Gets a decision record from the decision database. The functions returns the first matched |
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442 record. All the methods of the filter object except the client entity should be supplied to |
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443 get the intended decision record. If any other attribute of the filter object is missing, |
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444 either no decision might be found or a wrong decision may be retrieved |
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445 |
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446 @param aFilter A filter object whose client id, policy evaluator id, service id, |
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447 server id, fingerprint (and client entity) attributes are set. |
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448 */ |
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449 { |
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450 //Define a database table object handle |
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451 RDbTable dbTable; |
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452 CleanupClosePushL(dbTable); |
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453 |
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454 //Open the database table object and prepares it for searching |
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455 TDbSeekMultiKey<KIndexColumnNumber> seekKey; |
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456 PrepareForSearchL(dbTable,aFilter,seekKey); |
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457 |
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458 //Define the decision record that will be returned |
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459 CDecisionRecord* retRecord(0); |
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460 |
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461 if(dbTable.SeekL(seekKey)) |
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462 { |
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463 //Result found |
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464 CDbColSet* colSet = dbTable.ColSetL(); |
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465 CleanupStack::PushL(colSet); |
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466 |
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467 dbTable.GetL(); |
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468 |
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469 retRecord = CDecisionView::GenerateRecordL(dbTable,colSet); |
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470 |
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471 CleanupStack::PopAndDestroy(colSet); |
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472 } |
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473 |
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474 CleanupStack::PopAndDestroy(&dbTable); |
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475 |
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476 return retRecord; |
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477 } |
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478 |
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479 |
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480 EXPORT_C TBool CDecisionDbW::UpdateDecisionL(CDecisionFilter& aFilter, CDecisionRecord& aNewRecord) |
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481 { |
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482 //Define a database table object handle |
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483 RDbTable dbTable; |
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484 CleanupClosePushL(dbTable); |
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485 |
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486 //Open the database table object and prepares it for searching |
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487 TDbSeekMultiKey<KIndexColumnNumber> seekKey; |
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488 PrepareForSearchL(dbTable,aFilter,seekKey); |
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489 |
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490 TBool retValue = ETrue; //return value |
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491 |
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492 if(dbTable.SeekL(seekKey)) |
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493 { |
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494 //Get the current row |
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495 dbTable.GetL(); |
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496 //Prepare it for update |
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497 dbTable.UpdateL(); |
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498 //Set the new values |
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499 UpdateCurrentRowL(dbTable, aNewRecord); |
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500 //Commit the update |
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501 dbTable.PutL(); |
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502 } |
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503 else |
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504 { |
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505 retValue = EFalse; |
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506 } |
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507 |
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508 CleanupStack::PopAndDestroy(&dbTable); |
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509 |
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510 return retValue; |
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511 } |
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512 |
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513 |
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514 void CDecisionDbW::DoRemoveDecisionL(CDecisionFilter& aFilter) |
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515 /** |
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516 Deletes a set of records from the decision database. This function is called |
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517 by RemoveDecisionsL in a loop to be able to catch and repair index corruptions. |
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518 |
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519 @param aFilter A filter object |
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520 */ |
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521 { |
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522 //Create the SQL statement |
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523 RBuf sqlStatement; |
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524 CreateSqlStatementLC(aFilter, sqlStatement); |
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525 |
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526 RDbView dbView; |
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527 CleanupClosePushL(dbView); |
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528 |
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529 User::LeaveIfError(dbView.Prepare(iDatabase,TDbQuery(sqlStatement),TDbWindow::EUnlimited)); |
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530 User::LeaveIfError(dbView.EvaluateAll()); |
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531 |
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532 //Begin the delete transaction and lock the database |
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533 User::LeaveIfError(iDatabase.Begin()); |
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534 |
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535 while(dbView.NextL()) |
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536 { |
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537 dbView.DeleteL(); |
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538 } |
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539 |
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540 CleanupStack::PopAndDestroy(&dbView); |
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541 CleanupStack::PopAndDestroy(&sqlStatement); |
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542 |
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543 //Release the lock |
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544 TInt result = iDatabase.Commit(); |
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545 if(KErrNone != result) |
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546 { |
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547 DEBUG_PRINTF2(_L("Removing a decision has returned with %d. Rollback is now in proggress."),result); |
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548 iDatabase.Rollback(); |
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549 User::Leave(result); |
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550 } |
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551 } |
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552 |
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553 EXPORT_C void CDecisionDbW::RemoveDecisionsL(CDecisionFilter& aFilter) |
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554 /** |
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555 Deletes a set of records from the decision database. It is possible to delete a specific |
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556 decision record or a set of records based on a given filter. While this function is in |
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557 progress, the database is locked not to lead to an inconsistent data retrieving. If there |
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558 is any index corruption in the decision able, it is tried to be repaired automatically. |
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559 |
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560 @param aFilter A filter object |
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561 */ |
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562 { |
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563 TInt loopCount=1; |
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564 TInt error; |
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565 do |
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566 { |
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567 ++loopCount; |
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568 TRAP(error,DoRemoveDecisionL(aFilter)); |
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569 if(error == KErrCorrupt) |
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570 { |
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571 DEBUG_PRINTF2(_L("The database is corrupted and being recovered. Try %d"),loopCount); |
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572 error = iDatabase.Recover(); //Recover() may fail, so update error |
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573 } |
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574 }while(error==KErrCorrupt && loopCount<2); |
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575 |
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576 User::LeaveIfError(error); |
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577 } |
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578 |
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579 |
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580 EXPORT_C CDecisionDbCompactor *CDecisionDbW::PrepareCompactionLC() |
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581 /** |
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582 Creates a database compaction object to perform asynchronous compaction on the database. |
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583 |
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584 @return A pointer to the newly created database compaction object |
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585 The pointer is also put onto the cleanup stack. |
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586 */ |
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587 { |
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588 DEBUG_PRINTF(_L("The Ups database is being compacted.")); |
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589 CDecisionDbCompactor *compactor = CDecisionDbCompactor::NewLC(); |
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590 User::LeaveIfError(compactor->iDbIncremental.Compact(iDatabase,compactor->iStep())); |
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591 return compactor; |
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592 } |
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593 |