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1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @internalComponent |
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19 @released |
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20 */ |
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21 |
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22 |
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23 #include "ccontactprivate.h" |
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24 #include "CCntNotificationMonitor.h" |
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25 #include "rcntmodel.h" |
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26 |
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27 |
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28 extern void DebugLogNotification(const TDesC& aMethod, const TContactDbObserverEvent &aEvent); |
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29 |
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30 |
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31 CCntNotificationMonitor::CCntNotificationMonitor(RCntModel& aSession) |
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32 : CActive(EPriorityStandard), iSession(aSession) |
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33 {} |
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34 |
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35 |
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36 CCntNotificationMonitor::~CCntNotificationMonitor() |
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37 { |
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38 Cancel(); |
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39 } |
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40 |
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41 |
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42 void CCntNotificationMonitor::DoCancel() |
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43 { |
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44 // TRequestStatus* status = &iStatus; |
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45 // User::RequestComplete(status, KErrNone); |
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46 } |
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47 |
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48 |
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49 /** |
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50 This method is called each time the request for an event from the Server is |
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51 completed. |
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52 */ |
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53 void CCntDbNotifyMonitor::RunL() |
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54 { |
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55 if ( iStatus == KErrDied || iStatus == KErrServerTerminated ) |
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56 { |
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57 // We have lost our connection to the Server. Attempt to restart it, |
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58 // reconnect the session and open the Contacts database. |
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59 iSession.HandlePrematureServerTerminationL(); |
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60 // Request another event. |
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61 Start(); |
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62 return; |
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63 } |
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64 |
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65 |
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66 |
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67 |
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68 TInt count = iObserverArray.Count(); |
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69 TContactDbObserverEvent& event = iEventMsg(); |
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70 |
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71 #if defined(__VERBOSE_DEBUG__) |
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72 DebugLogNotification(_L("[CNTMODEL] CCntDbNotifyMonitor::RunL"), event); |
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73 #endif |
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74 |
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75 // Notify all registered observers of the event. |
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76 for (TInt i = 0 ; i < count ; ++i) |
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77 { |
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78 iCurrentProcessedObserver = i; |
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79 // Ignore any leave so we can notify all registered observers. |
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80 TRAP_IGNORE(iObserverArray[i]->HandleDatabaseEventL(event)); |
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81 // The call to HandleDatabaseEventL() above may remove or/add observer/observers |
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82 // so get the count again to cover this scenario. Also we have to update current |
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83 // loop counter. |
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84 i = iCurrentProcessedObserver; |
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85 count = iObserverArray.Count(); |
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86 } |
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87 |
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88 // Request another event. |
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89 Start(); |
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90 } |
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91 |
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92 |
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93 /** |
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94 First phase constructor. |
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95 */ |
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96 CCntDbNotifyMonitor::CCntDbNotifyMonitor(RCntModel& aSession) |
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97 : CCntNotificationMonitor(aSession), iCurrentProcessedObserver(KErrNotFound) |
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98 {} |
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99 |
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100 |
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101 /** |
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102 Second phase constructor. |
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103 |
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104 @param aSession Client-side session handle for Contacts Model Server. |
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105 */ |
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106 CCntDbNotifyMonitor* CCntDbNotifyMonitor::NewL(RCntModel& aSession) |
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107 { |
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108 CCntDbNotifyMonitor* self = new (ELeave) CCntDbNotifyMonitor(aSession); |
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109 CActiveScheduler::Add(self); |
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110 return(self); |
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111 } |
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112 |
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113 |
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114 CCntDbNotifyMonitor::~CCntDbNotifyMonitor() |
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115 { |
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116 iObserverArray.Close(); |
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117 } |
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118 |
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119 |
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120 /** |
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121 This method is called to request a Contacts database event from the Server. |
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122 The RunL() method will be called when an event is available (i.e. when the |
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123 Server completes the request. |
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124 */ |
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125 void CCntDbNotifyMonitor::Start() |
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126 { |
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127 // Check if a request for a Contacts database event from the Server has |
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128 // already been issued. |
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129 if (IsActive()) |
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130 { |
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131 return; |
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132 } |
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133 iStatus=KRequestPending; |
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134 iSession.StartNotificationTransfer(iStatus, iEventMsg); |
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135 SetActive(); |
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136 } |
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137 |
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138 |
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139 /** |
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140 Add a Contacts database event observer. |
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141 |
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142 @param aObserver The Contacts database event observer to add. |
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143 */ |
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144 void CCntDbNotifyMonitor::AddObserverL(MContactDbObserver& aObserver) |
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145 { |
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146 // Observers can be added from HandleDatabaseEventL() called from CCntDbNotifyMonitor::RunL() |
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147 // To avoid overcomplicated algorithms for concurent access to handlers array, new observer will |
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148 // be added always at the end of array. Whilst duplications are not allowed, a search is |
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149 // needed to check if observer is already added to observers array |
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150 |
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151 const TInt index = iObserverArray.Find(&aObserver); |
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152 if( index != KErrNotFound ) |
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153 { |
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154 User::Leave( KErrAlreadyExists ); |
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155 } |
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156 |
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157 User::LeaveIfError( iObserverArray.Append(&aObserver) ); |
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158 |
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159 // At least one observer now added so start request for Contacts database |
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160 // event from the Server (if it hasn't already been started i.e. if the AO |
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161 // is not already active). |
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162 Start(); |
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163 } |
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164 |
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165 |
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166 /** |
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167 Remove a Contacts database event observer. |
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168 |
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169 @param aObserver The Contacts database event observer to remove. |
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170 */ |
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171 void CCntDbNotifyMonitor::RemoveObserver(const MContactDbObserver& aObserver) |
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172 { |
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173 TInt index = iObserverArray.Find(&aObserver); |
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174 if (index != KErrNotFound) |
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175 { |
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176 iObserverArray.Remove(index); |
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177 |
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178 // Observers can be removed from HandleDatabaseEventL() called from CCntDbNotifyMonitor::RunL() |
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179 // In order to notify correctly remaining observers, we need to update current processed observer. |
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180 if( index <= iCurrentProcessedObserver ) |
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181 { |
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182 --iCurrentProcessedObserver; |
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183 } |
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184 |
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185 } |
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186 // If there are no more observers then cancel the event request in the |
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187 // Server. |
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188 if (iObserverArray.Count() == 0) |
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189 { |
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190 iSession.EndNotificationTransfer(); |
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191 } |
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192 } |
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193 |
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194 |
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195 /** |
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196 Get the number of registered observers. |
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197 |
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198 @return The number of registered observers. |
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199 */ |
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200 TInt CCntDbNotifyMonitor::NumberOfListeners() const |
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201 { |
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202 return iObserverArray.Count(); |
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203 } |
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204 |
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205 |
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206 TInt CCntDbNotifyMonitor::RunError(TInt /*aError*/) |
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207 { |
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208 #if defined(__VERBOSE_DEBUG__) |
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209 TContactDbObserverEvent& event = iEventMsg(); |
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210 DebugLogNotification(_L("[CNTMODEL] CCntDbNotifyMonitor::RunError"), event); |
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211 #endif |
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212 |
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213 Start(); |
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214 |
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215 return KErrNone; |
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216 } |