Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/csasyncrequesthandler_8cpp_source.html
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<h1>examples/S60CppExamples/ClientServerAsync/client/src/csasyncrequesthandler.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">* ==============================================================================</span>
<a name="l00003"></a>00003 <span class="comment">* Name : csasyncrequesthandler.cpp</span>
<a name="l00004"></a>00004 <span class="comment">* Part of : CSAsync</span>
<a name="l00005"></a>00005 <span class="comment">* Interface :</span>
<a name="l00006"></a>00006 <span class="comment">* Description :</span>
<a name="l00007"></a>00007 <span class="comment">* Version :</span>
<a name="l00008"></a>00008 <span class="comment">*</span>
<a name="l00009"></a>00009 <span class="comment">* Copyright (c) 2004-2006 Nokia Corporation.</span>
<a name="l00010"></a>00010 <span class="comment">* This material, including documentation and any related</span>
<a name="l00011"></a>00011 <span class="comment">* computer programs, is protected by copyright controlled by</span>
<a name="l00012"></a>00012 <span class="comment">* Nokia Corporation.</span>
<a name="l00013"></a>00013 <span class="comment">* ==============================================================================</span>
<a name="l00014"></a>00014 <span class="comment">*/</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="comment">// INCLUDE FILES</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include <e32svr.h></span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include "CSAsync.pan"</span>
<a name="l00020"></a>00020 <span class="preprocessor">#include "CSAsyncRequestHandler.h"</span>
<a name="l00021"></a>00021 <span class="preprocessor">#include "ClientServerCommon.h"</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include "AsyncTimeObserver.h"</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="comment">// ========================= MEMBER FUNCTIONS ==================================</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00027"></a>00027 <span class="comment">// CCSAsyncRequestHandler::NewL()</span>
<a name="l00028"></a>00028 <span class="comment">// Two-phased constructor.</span>
<a name="l00029"></a>00029 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00030"></a><a class="code" href="class_c_c_s_async_request_handler.html#ace1ec40e7106ef002104b42eee746f64">00030</a> <a class="code" href="class_c_c_s_async_request_handler.html">CCSAsyncRequestHandler</a>* <a class="code" href="class_c_c_s_async_request_handler.html#ace1ec40e7106ef002104b42eee746f64">CCSAsyncRequestHandler::NewL</a>(
<a name="l00031"></a>00031 <a class="code" href="class_m_async_time_observer.html">MAsyncTimeObserver</a>& aObserver )
<a name="l00032"></a>00032 {
<a name="l00033"></a>00033 <a class="code" href="class_c_c_s_async_request_handler.html">CCSAsyncRequestHandler</a>* <span class="keyword">self</span> = <a class="code" href="class_c_c_s_async_request_handler.html#a5e2a6f65b5d2a9c33a1bae7d76c334d1">NewLC</a>( aObserver );
<a name="l00034"></a>00034 CleanupStack::Pop( <span class="keyword">self</span> );
<a name="l00035"></a>00035 <span class="keywordflow">return</span>( <span class="keyword">self</span> ) ;
<a name="l00036"></a>00036 }
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00039"></a>00039 <span class="comment">// CCSAsyncRequestHandler::NewLC()</span>
<a name="l00040"></a>00040 <span class="comment">// Two-phased constructor.</span>
<a name="l00041"></a>00041 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00042"></a><a class="code" href="class_c_c_s_async_request_handler.html#a5e2a6f65b5d2a9c33a1bae7d76c334d1">00042</a> <a class="code" href="class_c_c_s_async_request_handler.html">CCSAsyncRequestHandler</a>* <a class="code" href="class_c_c_s_async_request_handler.html#a5e2a6f65b5d2a9c33a1bae7d76c334d1">CCSAsyncRequestHandler::NewLC</a>(
<a name="l00043"></a>00043 <a class="code" href="class_m_async_time_observer.html">MAsyncTimeObserver</a>& aObserver )
<a name="l00044"></a>00044 {
<a name="l00045"></a>00045 <a class="code" href="class_c_c_s_async_request_handler.html">CCSAsyncRequestHandler</a>* <span class="keyword">self</span> =
<a name="l00046"></a>00046 <span class="keyword">new</span> ( ELeave ) <a class="code" href="class_c_c_s_async_request_handler.html">CCSAsyncRequestHandler</a>( aObserver );
<a name="l00047"></a>00047 CleanupStack::PushL( <span class="keyword">self</span> );
<a name="l00048"></a>00048 <span class="keyword">self</span>->ConstructL();
<a name="l00049"></a>00049 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00053"></a>00053 <span class="comment">// CCSAsyncRequestHandler::ConstructL()</span>
<a name="l00054"></a>00054 <span class="comment">// Symbian 2nd phase constructor can leave.</span>
<a name="l00055"></a>00055 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00056"></a>00056 <span class="comment">//</span>
<a name="l00057"></a>00057 <span class="keywordtype">void</span> CCSAsyncRequestHandler::ConstructL()
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 User::LeaveIfError( iSession.<a class="code" href="class_r_time_server_session.html#a21ea524d4ff3c0622035d60c8a4c5f62">Connect</a>() );
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00063"></a>00063 <span class="comment">// CCSAsyncRequestHandler::CCSAsyncRequestHandler()</span>
<a name="l00064"></a>00064 <span class="comment">// C++ default constructor can NOT contain any code, that might leave.</span>
<a name="l00065"></a>00065 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00066"></a>00066 CCSAsyncRequestHandler::CCSAsyncRequestHandler( <a class="code" href="class_m_async_time_observer.html">MAsyncTimeObserver</a>& aObserver )
<a name="l00067"></a>00067 : CActive( EPriorityStandard ), iObserver( aObserver )
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 CActiveScheduler::Add( <span class="keyword">this</span> );
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00073"></a>00073 <span class="comment">// CCSAsyncRequestHandler::~CCSAsyncRequestHandler()</span>
<a name="l00074"></a>00074 <span class="comment">// Destructor.</span>
<a name="l00075"></a>00075 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00076"></a>00076 <span class="comment">//</span>
<a name="l00077"></a><a class="code" href="class_c_c_s_async_request_handler.html#abdff5aea2c8550c9399f2f78d8216e81">00077</a> <a class="code" href="class_c_c_s_async_request_handler.html#abdff5aea2c8550c9399f2f78d8216e81">CCSAsyncRequestHandler::~CCSAsyncRequestHandler</a>()
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 Cancel(); <span class="comment">// Causes call to DoCancel()</span>
<a name="l00080"></a>00080 iSession.Close();
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00084"></a>00084 <span class="comment">// CCSAsyncRequestHandler::RequestTime()</span>
<a name="l00085"></a>00085 <span class="comment">// Sends a request to the server for an update to the time.</span>
<a name="l00086"></a>00086 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00087"></a>00087 <span class="comment">//</span>
<a name="l00088"></a><a class="code" href="class_c_c_s_async_request_handler.html#ad34e374499b67c21347c5f87f7911324">00088</a> <span class="keywordtype">void</span> <a class="code" href="class_c_c_s_async_request_handler.html#ad34e374499b67c21347c5f87f7911324">CCSAsyncRequestHandler::RequestTime</a>()
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <span class="keywordflow">if</span> ( !IsActive() )
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092 iSession.<a class="code" href="class_r_time_server_session.html#a456203c7ad8889a4753222e98173ff00">RequestTime</a>( iTime, iStatus );
<a name="l00093"></a>00093 SetActive();
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00098"></a>00098 <span class="comment">// CCSAsyncRequestHandler::CancelRequest()</span>
<a name="l00099"></a>00099 <span class="comment">// Cancels an outstanding request.</span>
<a name="l00100"></a>00100 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00101"></a>00101 <span class="comment">//</span>
<a name="l00102"></a><a class="code" href="class_c_c_s_async_request_handler.html#a64c5f14d32e4351b484cbc5717457d4c">00102</a> <span class="keywordtype">void</span> <a class="code" href="class_c_c_s_async_request_handler.html#a64c5f14d32e4351b484cbc5717457d4c">CCSAsyncRequestHandler::CancelRequest</a>()
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 Cancel() ; <span class="comment">// Causes call to DoCancel()</span>
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00108"></a>00108 <span class="comment">// CCSAsyncRequestHandler::RunL()</span>
<a name="l00109"></a>00109 <span class="comment">// Invoked to handle responses from the server.</span>
<a name="l00110"></a>00110 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00111"></a>00111 <span class="comment">//</span>
<a name="l00112"></a><a class="code" href="class_c_c_s_async_request_handler.html#a68039f23cd042511b6911beeec532a0f">00112</a> <span class="keywordtype">void</span> <a class="code" href="class_c_c_s_async_request_handler.html#a68039f23cd042511b6911beeec532a0f">CCSAsyncRequestHandler::RunL</a>()
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 <span class="keywordflow">switch</span> ( iStatus.Int() )
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 <span class="keywordflow">case</span> ETimeServRequestTimeComplete:
<a name="l00117"></a>00117 <span class="comment">// The server has completed the request, signalled the client</span>
<a name="l00118"></a>00118 <span class="comment">// thread and the clients active scheduler runs the active object.</span>
<a name="l00119"></a>00119 <span class="comment">// Now do something with it</span>
<a name="l00120"></a>00120 iObserver.<a class="code" href="class_m_async_time_observer.html#a98b417b48bfe6a55ca0b450a97fa0b7e">HandleTimeUpdate</a>();
<a name="l00121"></a>00121 <a class="code" href="class_c_c_s_async_request_handler.html#ad34e374499b67c21347c5f87f7911324">RequestTime</a>(); <span class="comment">// Add this line to make the clock keep ticking</span>
<a name="l00122"></a>00122 break ;
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="keywordflow">case</span> KErrCancel:
<a name="l00125"></a>00125 <span class="comment">// The request was canceled</span>
<a name="l00126"></a>00126 break ;
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="keywordflow">case</span> KErrNotReady:
<a name="l00129"></a>00129 <span class="comment">// We requested a new time before completing the previous request</span>
<a name="l00130"></a>00130 <span class="keywordflow">default</span>:
<a name="l00131"></a>00131 User::Panic( KCSAsyncClient, ECSAsyncBadState ); <span class="comment">// Unexpected error</span>
<a name="l00132"></a>00132 <span class="keywordflow">break</span>;
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00137"></a>00137 <span class="comment">// CCSAsyncRequestHandler::DoCancel()</span>
<a name="l00138"></a>00138 <span class="comment">// Cancels any outstanding operation.</span>
<a name="l00139"></a>00139 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00140"></a>00140 <span class="comment">//</span>
<a name="l00141"></a><a class="code" href="class_c_c_s_async_request_handler.html#ab2c9e682b7fc6a09691feeb8c8ffe721">00141</a> <span class="keywordtype">void</span> <a class="code" href="class_c_c_s_async_request_handler.html#ab2c9e682b7fc6a09691feeb8c8ffe721">CCSAsyncRequestHandler::DoCancel</a>()
<a name="l00142"></a>00142 {
<a name="l00143"></a>00143 iSession.<a class="code" href="class_r_time_server_session.html#af8ab12245c507789cdc592212463be5e">CancelRequestTime</a>();
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00147"></a>00147 <span class="comment">// CCSAsyncRequestHandler::Time() const</span>
<a name="l00148"></a>00148 <span class="comment">// Gets a copy of the last time received from the server.</span>
<a name="l00149"></a>00149 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00150"></a>00150 <span class="comment">//</span>
<a name="l00151"></a><a class="code" href="class_c_c_s_async_request_handler.html#aabca1fcdd326961717cd467071b93432">00151</a> TTime <a class="code" href="class_c_c_s_async_request_handler.html#aabca1fcdd326961717cd467071b93432">CCSAsyncRequestHandler::Time</a>()<span class="keyword"> const</span>
<a name="l00152"></a>00152 <span class="keyword"> </span>{
<a name="l00153"></a>00153 <span class="keywordflow">return</span> iTime;
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155
<a name="l00156"></a>00156 <span class="comment">// End of File</span>
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