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1 /* |
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2 * Copyright (c) 2005 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 "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: An implementation class for receiving Mediator events. |
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15 * |
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16 */ |
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17 |
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18 |
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19 // INCLUDE FILES |
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20 #include <e32base.h> |
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21 #include "MediatorEventConsumerBody.h" |
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22 #include "MediatorServerClient.h" |
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23 #include "Debug.h" |
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24 |
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25 |
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26 // ============================ MEMBER FUNCTIONS =============================== |
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27 |
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28 CMediatorEventConsumerBody::CMediatorEventConsumerBody( MMediatorEventObserver* aObserver ) |
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29 : CActive( EPriorityNormal ), |
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30 iObserver( aObserver ), |
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31 iCategoryBuffer( iCategory ), |
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32 iEventBuffer( iEvent ), |
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33 iEventDataPtr( NULL, 0 ), |
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34 iDestroyed ( NULL ) |
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35 { |
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36 } |
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37 |
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38 void CMediatorEventConsumerBody::ConstructL() |
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39 { |
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40 CActiveScheduler::Add( this ); |
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41 User::LeaveIfError( iMediatorServer.Connect() ); |
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42 ResetDataBufferL( KMaxEventData ); |
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43 } |
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44 |
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45 CMediatorEventConsumerBody* CMediatorEventConsumerBody::NewL( |
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46 MMediatorEventObserver* aObserver ) |
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47 { |
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48 CMediatorEventConsumerBody* self = new( ELeave ) CMediatorEventConsumerBody( aObserver ); |
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49 |
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50 CleanupStack::PushL( self ); |
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51 self->ConstructL(); |
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52 CleanupStack::Pop( self ); |
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53 |
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54 return self; |
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55 } |
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56 |
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57 CMediatorEventConsumerBody::~CMediatorEventConsumerBody() |
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58 { |
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59 Cancel(); |
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60 iMediatorServer.Close(); |
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61 delete iEventData; |
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62 |
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63 if ( iDestroyed ) // RunL is being executed |
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64 { |
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65 *iDestroyed = ETrue; |
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66 } |
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67 } |
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68 |
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69 // ----------------------------------------------------------------------------- |
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70 // CMediatorEventConsumerBody::RunL |
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71 // |
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72 // (other items were commented in a header). |
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73 // ----------------------------------------------------------------------------- |
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74 // |
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75 void CMediatorEventConsumerBody::RunL() |
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76 { |
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77 TRACE(Print(_L("[Mediator Server]\t CMediatorEventConsumerBody::RunL status %d\n"), iStatus.Int() )); |
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78 |
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79 if ( iObserver && ( iStatus >= KErrNone ) ) |
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80 { |
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81 // Check the parameter data size. If bigger than expected, fetch it synchronously |
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82 TInt dataSize = iStatus.Int(); |
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83 if ( dataSize > iEventDataPtr.MaxLength() ) |
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84 { |
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85 // Reset data buffer for bigger size |
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86 ResetDataBufferL( dataSize ); |
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87 |
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88 // Fetch data from Mediator |
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89 iMediatorServer.FetchParameterData( iEventDataPtr ); |
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90 } |
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91 |
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92 // Set the flag to the member variable that is updated by the destructor |
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93 // in case this instance is destroyed by observer callback. |
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94 // Otherwise an attempt to manipulate member data after destruction will cause a panic. |
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95 TBool destroyed = EFalse; |
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96 iDestroyed = &destroyed; |
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97 |
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98 // must be trapped, so that leave won't cause access violation (iDestroyed pointing to a non-existing variable) |
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99 TRAPD( err, iObserver->MediatorEventL( iCategory.iDomain, |
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100 iCategory.iCategory, |
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101 iEvent.iEventId, |
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102 *iEventData ) ); |
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103 |
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104 if ( err != KErrNone ) |
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105 { |
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106 ERROR_TRACE(Print(_L("[Mediator] CMediatorEventConsumerBody::RunL: err=%d\n"), err ) ); |
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107 if ( !destroyed ) |
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108 { |
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109 iDestroyed = NULL; |
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110 } |
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111 User::Leave( err ); |
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112 } |
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113 |
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114 if ( destroyed ) |
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115 { |
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116 return; // instance destroyed in MediatorEventL, don't proceed to event receiving |
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117 } |
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118 |
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119 iDestroyed = NULL; // set member variable to NULL, because local variable goes out of scope |
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120 } |
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121 StartEventReceiving(); |
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122 } |
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123 |
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124 // ----------------------------------------------------------------------------- |
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125 // CMediatorEventConsumerBody::DoCancel |
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126 // |
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127 // (other items were commented in a header). |
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128 // ----------------------------------------------------------------------------- |
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129 // |
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130 void CMediatorEventConsumerBody::DoCancel() |
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131 { |
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132 LOG(_L("[Mediator Server]\t CMediatorEventConsumerBody::DoCancel\n")); |
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133 iMediatorServer.Cancel(); |
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134 } |
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135 |
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136 // ----------------------------------------------------------------------------- |
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137 // CMediatorEventConsumerBody::SubscribeEventL |
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138 // Subscribe to event category |
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139 // (other items were commented in a header). |
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140 // ----------------------------------------------------------------------------- |
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141 // |
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142 TInt CMediatorEventConsumerBody::SubscribeEvent( TUid aDomain, |
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143 TUid aCategory, |
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144 const REventList& aEvents ) |
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145 { |
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146 LOG(_L("[Mediator Server]\t CMediatorEventConsumerBody::SubscribeEvent\n")); |
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147 // Start to receive |
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148 StartEventReceiving(); |
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149 // Subscribe |
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150 return iMediatorServer.SubscribeEventList( aDomain, |
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151 aCategory, |
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152 aEvents ); |
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153 } |
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154 |
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155 // ----------------------------------------------------------------------------- |
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156 // CMediatorEventConsumerBody::SubscribeEventL |
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157 // Subscribe to event |
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158 // (other items were commented in a header). |
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159 // ----------------------------------------------------------------------------- |
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160 // |
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161 TInt CMediatorEventConsumerBody::SubscribeEvent( TUid aDomain, |
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162 TUid aCategory, |
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163 TInt aEventId, |
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164 TVersion aVersion ) |
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165 { |
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166 LOG(_L("[Mediator Server]\t CMediatorEventConsumerBody::SubscribeEvent\n")); |
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167 |
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168 __UHEAP_MARK; |
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169 |
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170 // Create a list to contain one event |
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171 REventList eventList; |
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172 TEvent event; |
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173 event.iEventId = aEventId; |
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174 event.iVersion = aVersion; |
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175 TInt error = eventList.Append( event ); |
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176 |
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177 if ( !error ) |
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178 { |
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179 // Start to receive |
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180 StartEventReceiving(); |
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181 // Subscribe eventlist |
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182 error = iMediatorServer.SubscribeEventList( aDomain, |
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183 aCategory, |
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184 eventList ); |
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185 } |
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186 else |
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187 { |
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188 ERROR_TRACE(Print(_L("[Mediator] CMediatorEventConsumerBody::SubscribeEvent: error=%d\n"), error ) ); |
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189 } |
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190 |
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191 // Clean up |
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192 eventList.Reset(); |
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193 |
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194 __UHEAP_MARKEND; |
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195 return error; |
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196 } |
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197 |
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198 // ----------------------------------------------------------------------------- |
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199 // CMediatorEventConsumerBody::UnsubscribeEvent |
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200 // Unsubscibe an event category. |
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201 // (other items were commented in a header). |
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202 // ----------------------------------------------------------------------------- |
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203 // |
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204 TInt CMediatorEventConsumerBody::UnsubscribeEvent( TUid aDomain, |
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205 TUid aCategory, |
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206 const REventList& aEvents ) |
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207 { |
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208 LOG(_L("[Mediator Server]\t CMediatorEventConsumerBody::UnsubscribeEvent list\n")); |
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209 return iMediatorServer.UnsubscribeEventList( aDomain, aCategory, aEvents ); |
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210 } |
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211 |
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212 // ----------------------------------------------------------------------------- |
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213 // CMediatorEventConsumerBody::UnsubscribeEvent |
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214 // Unsubscibe an event. |
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215 // (other items were commented in a header). |
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216 // ----------------------------------------------------------------------------- |
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217 // |
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218 TInt CMediatorEventConsumerBody::UnsubscribeEvent( TUid aDomain, |
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219 TUid aCategory, |
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220 TInt aEventId ) |
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221 { |
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222 LOG(_L("[Mediator Server]\t CMediatorEventConsumerBody::UnsubscribeEvent\n")); |
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223 __UHEAP_MARK; |
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224 |
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225 // Create a list to contain one event |
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226 REventList eventList; |
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227 TEvent event; |
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228 event.iEventId = aEventId; |
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229 TInt error = eventList.Append( event ); |
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230 |
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231 if ( !error ) |
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232 { |
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233 // Unsubscribe eventlist |
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234 error = iMediatorServer.UnsubscribeEventList( aDomain, |
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235 aCategory, |
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236 eventList ); |
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237 } |
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238 else |
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239 { |
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240 ERROR_TRACE(Print(_L("[Mediator] CMediatorEventConsumerBody::UnsubscribeEvent: error=%d\n"), error ) ); |
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241 } |
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242 |
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243 // Clean up |
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244 eventList.Reset(); |
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245 |
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246 __UHEAP_MARKEND; |
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247 return error; |
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248 } |
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249 |
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250 // ----------------------------------------------------------------------------- |
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251 // CMediatorEventConsumerBody::StartEventReceiving |
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252 // Starts to wait for events |
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253 // (other items were commented in a header). |
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254 // ----------------------------------------------------------------------------- |
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255 // |
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256 void CMediatorEventConsumerBody::StartEventReceiving() |
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257 { |
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258 if ( !IsActive() ) |
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259 { |
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260 iMediatorServer.ReceiveEvents( iStatus, |
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261 iCategoryBuffer, |
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262 iEventBuffer, |
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263 iEventDataPtr ); |
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264 SetActive(); |
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265 } |
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266 } |
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267 |
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268 // ----------------------------------------------------------------------------- |
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269 // CMediatorEventConsumerBody::ResetDataBufferL |
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270 // Starts to receive commands asynchronously |
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271 // (other items were commented in a header). |
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272 // ----------------------------------------------------------------------------- |
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273 // |
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274 void CMediatorEventConsumerBody::ResetDataBufferL( TInt aSize ) |
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275 { |
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276 if ( iEventData ) |
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277 { |
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278 delete iEventData; |
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279 iEventData = NULL; |
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280 } |
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281 iEventData = HBufC8::NewL( aSize ); |
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282 iEventDataPtr.Set( iEventData->Des() ); |
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283 |
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284 } |
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285 // End of File |