Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_c_collector_8cpp_source.html
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<h1>examples/Base/MessageQueueExample/src/CCollector.cpp</h1><a href="_c_collector_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span>
<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">// The following class takes user input and sends it to a different </span>
<a name="l00015"></a>00015 <span class="comment">// process called inverter.exe via InverterInQ message Queue.</span>
<a name="l00016"></a>00016 <span class="comment">//</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018
<a name="l00019"></a>00019
<a name="l00024"></a>00024 <span class="preprocessor">#include "CCollector.h"</span>
<a name="l00025"></a>00025 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTitle,<span class="stringliteral">"InputMessage"</span>);
<a name="l00026"></a>00026 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KWelcome,<span class="stringliteral">" Welcome to Message Queue Example application for the global queues\n"</span>);
<a name="l00027"></a>00027 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KEnterWords, <span class="stringliteral">"\n Enter some words and press enter key to send to inverter or Press Esc to exit.\n"</span>);
<a name="l00028"></a>00028 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KGlobalInverterInQ, <span class="stringliteral">"InverterInQ"</span>);
<a name="l00029"></a>00029 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KGlobalInverterOutQ, <span class="stringliteral">"InverterOutQ"</span>);
<a name="l00030"></a>00030 <span class="keyword">const</span> TInt KNumberOfMsgs = 10;
<a name="l00031"></a>00031
<a name="l00035"></a><a class="code" href="class_c_collector.html#a62eb0d5618f19c12f0e2fde477ce6e33">00035</a> <a class="code" href="class_c_collector.html#a62eb0d5618f19c12f0e2fde477ce6e33">CCollector::CCollector</a>(TInt aPriority):CActive( aPriority )
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039
<a name="l00040"></a>00040 CCollector::~CCollector()
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042 Cancel();
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="keywordtype">void</span> CCollector::DoCancel()
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00054"></a><a class="code" href="class_c_collector.html#a7324ad866c1c03594465d5549aec5546">00054</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#a7324ad866c1c03594465d5549aec5546">CCollector::ConstructL</a>()
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 iConsole = Console::NewL(KTitle, TSize(KConsFullScreen, KConsFullScreen));
<a name="l00057"></a>00057 iConsole->Printf(KWelcome);
<a name="l00058"></a>00058 iConsole->Printf(KEnterWords);
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="comment">//Create global message queue , which is used as input to the inverter and output to the collector.</span>
<a name="l00061"></a>00061 User::LeaveIfError(iInverterInQ.CreateGlobal(KGlobalInverterInQ, KNumberOfMsgs, EOwnerProcess));
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="comment">//Create global message queue , which is used as output to the inverter and input to the collector.</span>
<a name="l00064"></a>00064 User::LeaveIfError(iInverterOutQ.CreateGlobal(KGlobalInverterOutQ, KNumberOfMsgs, EOwnerProcess));
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="comment">//Start Inverter process.</span>
<a name="l00067"></a>00067 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KProcessName, <span class="stringliteral">"inverter.exe"</span>);
<a name="l00068"></a>00068 User::LeaveIfError(process.Create(KProcessName, KNullDesC));
<a name="l00069"></a>00069 process.Resume();
<a name="l00070"></a>00070
<a name="l00071"></a>00071 iRcvInverterInQ= CMsgQActive::NewL();
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <a class="code" href="class_c_collector.html">CCollector</a>* CCollector::NewL(TInt aPriority)
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 <a class="code" href="class_c_collector.html">CCollector</a>* <span class="keyword">self</span>=<span class="keyword">new</span>(ELeave)<a class="code" href="class_c_collector.html">CCollector</a>(aPriority);
<a name="l00077"></a>00077 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00078"></a>00078 <span class="keyword">self</span>->ConstructL();
<a name="l00079"></a>00079 CleanupStack::Pop(<span class="keyword">self</span>);
<a name="l00080"></a>00080 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00086"></a><a class="code" href="class_c_collector.html#a3ed2cf3df9b76aa36ff1052f9144f94a">00086</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#a3ed2cf3df9b76aa36ff1052f9144f94a">CCollector::RequestFunction</a>()
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 iConsole->Read(iStatus);
<a name="l00089"></a>00089 SetActive();
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00095"></a><a class="code" href="class_c_collector.html#afeea3cfdbcd23f07b9c02ac93e87cf81">00095</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#afeea3cfdbcd23f07b9c02ac93e87cf81">CCollector::RunL</a>()
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 <span class="comment">//Store the words input by the user in a buffer.</span>
<a name="l00098"></a>00098 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KChar,<span class="stringliteral">"%c"</span>);
<a name="l00099"></a>00099 iConsole->Printf(KChar,(TUint8)(iConsole->KeyCode()));
<a name="l00100"></a>00100 iBuf.Append(iConsole->KeyCode());
<a name="l00101"></a>00101 <a class="code" href="class_c_collector.html#ad2b71e3272b298ba8ca40dc4049cca07">ProcessKeyPress</a>(TChar(iConsole->KeyCode()));
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00108"></a><a class="code" href="class_c_collector.html#ad2b71e3272b298ba8ca40dc4049cca07">00108</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#ad2b71e3272b298ba8ca40dc4049cca07">CCollector::ProcessKeyPress</a>(TChar aChar)
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 <span class="keywordflow">if</span> (aChar == EKeyEscape)
<a name="l00111"></a>00111 {
<a name="l00112"></a>00112 this-><a class="code" href="class_c_collector.html#ad038923135df997b7c8d121c63a4cf29">Stop</a>();
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(aChar == EKeyEnter)
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KNextLine , <span class="stringliteral">"\n"</span>);
<a name="l00117"></a>00117 iConsole->Printf(KNextLine);
<a name="l00118"></a>00118 this-><a class="code" href="class_c_collector.html#ad22077e2d9c23fb39e4073ccacd1ee89">SendMsgInQ</a>(iBuf);
<a name="l00119"></a>00119 iBuf.Zero();
<a name="l00120"></a>00120 this-><a class="code" href="class_c_collector.html#a3ed2cf3df9b76aa36ff1052f9144f94a">RequestFunction</a>();
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 <span class="keywordflow">else</span>
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 this-><a class="code" href="class_c_collector.html#a3ed2cf3df9b76aa36ff1052f9144f94a">RequestFunction</a>();
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00131"></a><a class="code" href="class_c_collector.html#ad038923135df997b7c8d121c63a4cf29">00131</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#ad038923135df997b7c8d121c63a4cf29">CCollector::Stop</a>()
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 TBuf<1> escape;
<a name="l00134"></a>00134 escape.Append(EKeyEscape);
<a name="l00135"></a>00135 <span class="comment">//Sends stop message to the inverter.</span>
<a name="l00136"></a>00136 this-><a class="code" href="class_c_collector.html#ad22077e2d9c23fb39e4073ccacd1ee89">SendMsgInQ</a>(escape);
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">//Cancel any outstanding request.</span>
<a name="l00139"></a>00139 iRcvInverterInQ->Cancel();
<a name="l00140"></a>00140 <span class="keyword">delete</span> iRcvInverterInQ;
<a name="l00141"></a>00141 <span class="keyword">delete</span> iConsole;
<a name="l00142"></a>00142 <a class="code" href="class_c_collector.html#ad038923135df997b7c8d121c63a4cf29">CActiveScheduler::Stop</a>();
<a name="l00143"></a>00143 escape.Zero();
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00150"></a><a class="code" href="class_c_collector.html#ac93385f6f18c9e3a6d0fb92a989acb67">00150</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#ac93385f6f18c9e3a6d0fb92a989acb67">CCollector::StartRecieving</a>()
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 iRcvInverterInQ-><a class="code" href="class_c_msg_q_active.html#a5753cfd0f59382c0811757825e0462f5">StartRecieving</a>();
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154
<a name="l00158"></a><a class="code" href="class_c_collector.html#ad22077e2d9c23fb39e4073ccacd1ee89">00158</a> <span class="keywordtype">void</span> <a class="code" href="class_c_collector.html#ad22077e2d9c23fb39e4073ccacd1ee89">CCollector::SendMsgInQ</a>(TBuf<100> buf)
<a name="l00159"></a>00159 {
<a name="l00160"></a>00160 TInt ret = iInverterInQ.OpenGlobal(KGlobalInverterInQ);
<a name="l00161"></a>00161 <span class="keywordflow">if</span> (ret == KErrNone)
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163 iInverterInQ.SendBlocking(buf);
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166
<a name="l00167"></a>00167 LOCAL_C <span class="keywordtype">void</span> DoStartL()
<a name="l00168"></a>00168 {
<a name="l00169"></a>00169 <span class="comment">// Create active scheduler (to run active objects)</span>
<a name="l00170"></a>00170 CActiveScheduler* scheduler = <span class="keyword">new</span> (ELeave) CActiveScheduler();
<a name="l00171"></a>00171 CleanupStack::PushL(scheduler);
<a name="l00172"></a>00172 CActiveScheduler::Install(scheduler);
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <a class="code" href="class_c_collector.html">CCollector</a>* iCollect= CCollector::NewL();
<a name="l00175"></a>00175 CleanupStack::PushL(iCollect);
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="comment">//Start getting the user input.</span>
<a name="l00178"></a>00178 iCollect-><a class="code" href="class_c_collector.html#a3ed2cf3df9b76aa36ff1052f9144f94a">RequestFunction</a>();
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="comment">//Recieve data from the inverter in another console.</span>
<a name="l00181"></a>00181 iCollect-><a class="code" href="class_c_collector.html#ac93385f6f18c9e3a6d0fb92a989acb67">StartRecieving</a>();
<a name="l00182"></a>00182 CActiveScheduler::Start();
<a name="l00183"></a>00183
<a name="l00184"></a>00184 CleanupStack::PopAndDestroy(iCollect);
<a name="l00185"></a>00185 CleanupStack::PopAndDestroy(scheduler);
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187
<a name="l00188"></a><a class="code" href="_c_collector_8cpp.html#a0f358e9c4355138f629b8c4f37310295">00188</a> GLDEF_C TInt E32Main()
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 __UHEAP_MARK;
<a name="l00191"></a>00191 CTrapCleanup* cleanup = CTrapCleanup::New();
<a name="l00192"></a>00192 <span class="keywordflow">if</span>(cleanup == NULL)
<a name="l00193"></a>00193 {
<a name="l00194"></a>00194 <span class="keywordflow">return</span> KErrNoMemory;
<a name="l00195"></a>00195 }
<a name="l00196"></a>00196 TRAPD(mainError, DoStartL());
<a name="l00197"></a>00197 <span class="keywordflow">if</span>(mainError != KErrNone)
<a name="l00198"></a>00198 {
<a name="l00199"></a>00199 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KUserPanic,<span class="stringliteral">"Failed to complete"</span>);
<a name="l00200"></a>00200 User::Panic(KUserPanic, mainError);
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202 <span class="keyword">delete</span> cleanup;
<a name="l00203"></a>00203 __UHEAP_MARKEND;
<a name="l00204"></a>00204 <span class="keywordflow">return</span> KErrNone;
<a name="l00205"></a>00205 }
<a name="l00206"></a>00206
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