Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/taskscheduler_8cpp_source.html
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<h1>examples/SysLibs/TaskSchedulerExample/taskscheduler.cpp</h1><a href="taskscheduler_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) 2007-2009 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">// This is simple example code that demonstrates the use of task scheduler. </span>
<a name="l00015"></a>00015 <span class="comment">// The code demonstrates how to,</span>
<a name="l00016"></a>00016 <span class="comment">// 1) Connect and register with the task scheduler</span>
<a name="l00017"></a>00017 <span class="comment">// 2) Create a persistent schedule</span>
<a name="l00018"></a>00018 <span class="comment">// 3) Add tasks to it</span>
<a name="l00019"></a>00019 <span class="comment">// 4) Execute the schedule</span>
<a name="l00020"></a>00020 <span class="comment">// 5) Delete the schedules and the tasks associated with them after</span>
<a name="l00021"></a>00021 <span class="comment">// verifying that they are the schedules created by us.</span>
<a name="l00022"></a>00022 <span class="comment">// 6) Create a transient schedule</span>
<a name="l00023"></a>00023 <span class="comment">// 7) Add task to the transient schedule, edit the schedule and execute it</span>
<a name="l00024"></a>00024 <span class="comment">//</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026
<a name="l00027"></a>00027
<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="taskscheduler_8h.html">taskscheduler.h</a>"</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <e32std.h></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <schinfo.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <e32base.h></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTaskName,<span class="stringliteral">"MyTaskName\n"</span>);
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTitle, <span class="stringliteral">"Task Scheduler example"</span>);
<a name="l00039"></a>00039 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTextPressAKey, <span class="stringliteral">"\nPress any key to step through the example\n"</span>);
<a name="l00040"></a>00040 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KExit,<span class="stringliteral">"\nPress any key to exit the application"</span>);
<a name="l00041"></a>00041 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KPressAKey,<span class="stringliteral">"\nPress any key to continue\n"</span>);
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KConnect, <span class="stringliteral">"\nConnecting the client to the task scheduler server"</span>);
<a name="l00044"></a>00044 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KRegisterClient,<span class="stringliteral">"\nRegistering the client\n"</span>);
<a name="l00045"></a>00045 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCreateSchedule,<span class="stringliteral">"Creating a persistent schedule\n"</span>);
<a name="l00046"></a>00046 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCreateTask,<span class="stringliteral">"Creating task for the schedule\n"</span>);
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KPersistentWait,<span class="stringliteral">"Waiting for the persistent task to complete. This will take 20 seconds\n"</span>);
<a name="l00049"></a>00049 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDone,<span class="stringliteral">"Task complete \n"</span>);
<a name="l00050"></a>00050 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTransientSchedule,<span class="stringliteral">"A transient schedule"</span>);
<a name="l00051"></a>00051 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTransientWait,<span class="stringliteral">"Waiting for the transient task to complete. This will take 20 seconds\n"</span>);
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KCreateTransient,<span class="stringliteral">"\nCreating a transient schedule with non-repeating task\n"</span>);
<a name="l00054"></a>00054 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDeleteAllTasks,<span class="stringliteral">"\nDeleting all the persistent tasks scheduled by this exe"</span>);
<a name="l00055"></a>00055 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KDeleteAllSchedules,<span class="stringliteral">"\nDeleting all schedules created by this exe\n"</span>);
<a name="l00056"></a>00056 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTask, <span class="stringliteral">"Number of task(s) scheduled by us is(are) %d\n"</span>);
<a name="l00057"></a>00057 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KExists, <span class="stringliteral">"The tasks scheduled exist\n"</span>);
<a name="l00058"></a>00058 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KOtherTask,<span class="stringliteral">"Error! Unexpected schedules not scheduled by this exe exist\n"</span>);
<a name="l00059"></a>00059
<a name="l00064"></a><a class="code" href="class_c_task_schedule.html#ad152b61017146041468ce89a4312ddf9">00064</a> <a class="code" href="class_c_task_schedule.html">CTaskSchedule</a>* <a class="code" href="class_c_task_schedule.html#ad152b61017146041468ce89a4312ddf9">CTaskSchedule::NewLC</a>()
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 <a class="code" href="class_c_task_schedule.html">CTaskSchedule</a>* schedule = <span class="keyword">new</span>(ELeave) <a class="code" href="class_c_task_schedule.html">CTaskSchedule</a>();
<a name="l00067"></a>00067 CleanupStack::PushL(schedule);
<a name="l00068"></a>00068 schedule->ConstructL();
<a name="l00069"></a>00069 <span class="keywordflow">return</span> schedule;
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00075"></a>00075 CTaskSchedule::CTaskSchedule()
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00079"></a>00079 <span class="keywordtype">void</span> CTaskSchedule::ConstructL()
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 iConsole = Console::NewL(KTitle,TSize(KConsFullScreen,KConsFullScreen));
<a name="l00082"></a>00082 iConsole->Printf (KTextPressAKey);
<a name="l00083"></a>00083 iConsole->Getch ();
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00089"></a><a class="code" href="class_c_task_schedule.html#a739ccbea3ef8f1dc76440e829f206fb6">00089</a> <a class="code" href="class_c_task_schedule.html#a739ccbea3ef8f1dc76440e829f206fb6">CTaskSchedule::~CTaskSchedule</a>()
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 iScheduler.Close();
<a name="l00092"></a>00092 iConsole->Printf(KExit);
<a name="l00093"></a>00093 iConsole->Getch();
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keyword">delete</span> iConsole;
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097
<a name="l00104"></a><a class="code" href="class_c_task_schedule.html#ac957da1838fe31cb3f7fe9f6a533f6c5">00104</a> <span class="keywordtype">void</span> <a class="code" href="class_c_task_schedule.html#ac957da1838fe31cb3f7fe9f6a533f6c5">CTaskSchedule::ConnectAndRegisterL</a>()
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// Connect to the scheduler server</span>
<a name="l00108"></a>00108 iConsole->Printf(KConnect);
<a name="l00109"></a>00109 User::LeaveIfError(iScheduler.Connect());
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTaskExec,<span class="stringliteral">"Taskexecutor"</span>);
<a name="l00112"></a>00112 TFileName filename;
<a name="l00113"></a>00113 filename.Append(KTaskExec);
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">// Register with the scheduler</span>
<a name="l00116"></a>00116 iConsole->Printf(KRegisterClient);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">// A priority value</span>
<a name="l00119"></a>00119 <span class="keyword">const</span> TInt priority = 3;
<a name="l00120"></a>00120 User::LeaveIfError(iScheduler.Register(filename, priority));
<a name="l00121"></a>00121
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00130"></a><a class="code" href="class_c_task_schedule.html#a5b7869136d2a8f1c625531ab1c12ef98">00130</a> <span class="keywordtype">void</span> <a class="code" href="class_c_task_schedule.html#a5b7869136d2a8f1c625531ab1c12ef98">CTaskSchedule::PersistentScheduleL</a>()
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132
<a name="l00133"></a>00133 iConsole->Printf(KCreateSchedule);
<a name="l00134"></a>00134 TSchedulerItemRef scheduleHandle;
<a name="l00135"></a>00135 TTime time;
<a name="l00136"></a>00136 time.UniversalTime();
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">// Assign an offset of 20 seconds. TTimeIntervalMinutes, </span>
<a name="l00139"></a>00139 <span class="comment">// TTimeIntervalHours etc can be used for longer offsets.</span>
<a name="l00140"></a>00140 time += TTimeIntervalSeconds(20);<span class="comment">// 20 secs in future</span>
<a name="l00141"></a>00141
<a name="l00142"></a>00142 TTsTime time2 (time, ETrue);
<a name="l00143"></a>00143
<a name="l00144"></a>00144 iConsole->Printf(KCreateTask);
<a name="l00145"></a>00145 <a class="code" href="class_c_task_schedule.html#ac2ed627ab19ecc8d397b63ceacd6aaa4">CreatePersistentScheduleL</a>(scheduleHandle,time2);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">// Create the task to be scheduled</span>
<a name="l00148"></a>00148 TTaskInfo taskInfo;
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keyword">const</span> TInt priority = 2;
<a name="l00151"></a>00151 <span class="keyword">const</span> TInt numberOfRepeats = 2;
<a name="l00152"></a>00152 <span class="comment">// Name of the task</span>
<a name="l00153"></a>00153 taskInfo.iName = KTaskName;
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">// Task priority set by the client. </span>
<a name="l00156"></a>00156 <span class="comment">// If the client has two tasks with different priorities, </span>
<a name="l00157"></a>00157 <span class="comment">// the task with the higher priority will be executed first.</span>
<a name="l00158"></a>00158 taskInfo.iPriority = priority;
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="comment">// Task repeats twice</span>
<a name="l00161"></a>00161 taskInfo.iRepeat = numberOfRepeats;
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KScheduleType,<span class="stringliteral">" persistent schedule"</span>);
<a name="l00164"></a>00164 <span class="keyword">const</span> TDesC* persistent = &KScheduleType;
<a name="l00165"></a>00165 HBufC* data = persistent->AllocLC();
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="comment">// Add the task</span>
<a name="l00168"></a>00168 User::LeaveIfError(iScheduler.ScheduleTask(taskInfo, *data, scheduleHandle.iHandle));
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="comment">// Wait for the entry to fire</span>
<a name="l00171"></a>00171 iConsole->Printf(KPersistentWait);
<a name="l00172"></a>00172 <span class="keyword">const</span> TInt twentySecs = 20000000;
<a name="l00173"></a>00173 User::After(twentySecs); <span class="comment">// pause for 20 seconds</span>
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="comment">// Delete all the persistent schedules created</span>
<a name="l00176"></a>00176 <a class="code" href="class_c_task_schedule.html#a0c3db205409436a0b47b3e11c9d3190f">DeleteSchedulesL</a>(scheduleHandle, EAllSchedules);
<a name="l00177"></a>00177
<a name="l00178"></a>00178 CleanupStack::PopAndDestroy(1); <span class="comment">// data</span>
<a name="l00179"></a>00179
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182
<a name="l00197"></a><a class="code" href="class_c_task_schedule.html#ac2ed627ab19ecc8d397b63ceacd6aaa4">00197</a> <span class="keywordtype">void</span> <a class="code" href="class_c_task_schedule.html#ac2ed627ab19ecc8d397b63ceacd6aaa4">CTaskSchedule::CreatePersistentScheduleL</a>(TSchedulerItemRef& aRef, <span class="keyword">const</span> TTsTime& aStartTime)
<a name="l00198"></a>00198 {
<a name="l00199"></a>00199 CArrayFixFlat<TScheduleEntryInfo2>* cSchEntryInfoArray;
<a name="l00200"></a>00200 cSchEntryInfoArray = <span class="keyword">new</span> CArrayFixFlat<TScheduleEntryInfo2>(1);
<a name="l00201"></a>00201 CleanupStack::PushL(cSchEntryInfoArray);
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">// Create an hourly schedule with StartTime of aStartTime</span>
<a name="l00204"></a>00204 TScheduleEntryInfo2 entry1;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 <span class="comment">// Set the first instance when the entry will </span>
<a name="l00207"></a>00207 <span class="comment">// cause the execution of tasks. </span>
<a name="l00208"></a>00208 entry1.SetStartTime(aStartTime);
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="comment">// Set the type of interval used between due times </span>
<a name="l00211"></a>00211 <span class="comment">// for the scheduled entry</span>
<a name="l00212"></a>00212 entry1.SetIntervalType(TIntervalType(EHourly));
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="comment">// Set the period for which the entry is valid. After 8 hours the </span>
<a name="l00215"></a>00215 <span class="comment">// tasks associated with the entry will not be eligible for execution.</span>
<a name="l00216"></a>00216 <span class="keyword">const</span> TInt eightHours = 480; <span class="comment">// in minutes </span>
<a name="l00217"></a>00217 entry1.SetValidityPeriod(TTimeIntervalMinutes (eightHours));
<a name="l00218"></a>00218
<a name="l00219"></a>00219 <span class="comment">// Set the interval between execution of tasks</span>
<a name="l00220"></a>00220 <span class="comment">// Here the interval is 1 hour because the interval type is hourly.</span>
<a name="l00221"></a>00221 <span class="keyword">const</span> TInt interval = 1;
<a name="l00222"></a>00222 entry1.SetInterval(interval);
<a name="l00223"></a>00223
<a name="l00224"></a>00224 cSchEntryInfoArray->AppendL(entry1);
<a name="l00225"></a>00225
<a name="l00226"></a>00226 User::LeaveIfError(iScheduler.CreatePersistentSchedule(aRef, *cSchEntryInfoArray));
<a name="l00227"></a>00227 CleanupStack::PopAndDestroy(cSchEntryInfoArray);
<a name="l00228"></a>00228
<a name="l00229"></a>00229 }
<a name="l00230"></a>00230
<a name="l00231"></a>00231
<a name="l00240"></a><a class="code" href="class_c_task_schedule.html#aabfef5ace0331f83eb8cd4de511d3d7f">00240</a> <span class="keywordtype">void</span> <a class="code" href="class_c_task_schedule.html#aabfef5ace0331f83eb8cd4de511d3d7f">CTaskSchedule::CreateTransientScheduleL</a>()
<a name="l00241"></a>00241 {
<a name="l00242"></a>00242 iConsole->ClearScreen();
<a name="l00243"></a>00243
<a name="l00244"></a>00244 TSchedulerItemRef ref;
<a name="l00245"></a>00245 CArrayFixFlat<TScheduleEntryInfo2>* cSchEntryInfoArray;
<a name="l00246"></a>00246 cSchEntryInfoArray = <span class="keyword">new</span> CArrayFixFlat<TScheduleEntryInfo2>(1);
<a name="l00247"></a>00247
<a name="l00248"></a>00248 CleanupStack::PushL(cSchEntryInfoArray);
<a name="l00249"></a>00249 ref.iName = KTransientSchedule;
<a name="l00250"></a>00250 iConsole->Printf(KCreateTransient);
<a name="l00251"></a>00251
<a name="l00252"></a>00252 <span class="comment">// Create a schedule entry</span>
<a name="l00253"></a>00253 TScheduleEntryInfo2 entry;
<a name="l00254"></a>00254 TTime now;
<a name="l00255"></a>00255
<a name="l00256"></a>00256 <span class="comment">// Set the date and time of this TTime to the universal time. </span>
<a name="l00257"></a>00257 now.UniversalTime();
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="comment">// Assign an offset of 15 seconds. TTimeIntervalMinutes, </span>
<a name="l00260"></a>00260 <span class="comment">// TTimeIntervalHours etc can be used for longer offsets.</span>
<a name="l00261"></a>00261 TInt offset = 15;
<a name="l00262"></a>00262 now += TTimeIntervalSeconds(offset);
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <span class="comment">// Constructs a TTsTime with a TTime object. </span>
<a name="l00265"></a>00265 <span class="comment">// ETrue indicates that TTsTime is UTC based time</span>
<a name="l00266"></a>00266 TTsTime time (now, ETrue);
<a name="l00267"></a>00267
<a name="l00268"></a>00268 <span class="comment">// Set the above time as the first time at which </span>
<a name="l00269"></a>00269 <span class="comment">// the entry will cause execution of tasks. </span>
<a name="l00270"></a>00270 entry.SetStartTime(time);
<a name="l00271"></a>00271
<a name="l00272"></a>00272 <span class="comment">// Set the type of interval used between due times for scheduled entry</span>
<a name="l00273"></a>00273 entry.SetIntervalType(TIntervalType(EHourly));
<a name="l00274"></a>00274
<a name="l00275"></a>00275 <span class="comment">// Set the period for which the entry is valid. </span>
<a name="l00276"></a>00276 <span class="comment">// After 2 hours the tasks associated with the entry will not be eligible for execution </span>
<a name="l00277"></a>00277 TInt validity = 120;
<a name="l00278"></a>00278 entry.SetValidityPeriod(TTimeIntervalMinutes (validity));
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="comment">// Set the interval between execution of tasks</span>
<a name="l00281"></a>00281 <span class="comment">// Here the interval is 1 hour because the interval type is hourly.</span>
<a name="l00282"></a>00282 entry.SetInterval(1);
<a name="l00283"></a>00283 cSchEntryInfoArray->AppendL(entry);
<a name="l00284"></a>00284
<a name="l00285"></a>00285 <span class="comment">// Create a transient task to be scheduled</span>
<a name="l00286"></a>00286 TTaskInfo taskInfo;
<a name="l00287"></a>00287 <span class="comment">// Name of the task</span>
<a name="l00288"></a>00288 taskInfo.iName = KTransientSchedule;
<a name="l00289"></a>00289 <span class="comment">// Task id</span>
<a name="l00290"></a>00290 <span class="keyword">const</span> TInt tId = 0;
<a name="l00291"></a>00291 taskInfo.iTaskId = tId;
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="comment">// The task repeats just once</span>
<a name="l00294"></a>00294 <span class="keyword">const</span> TInt numberOfRepeats = 1;
<a name="l00295"></a>00295 taskInfo.iRepeat = numberOfRepeats;
<a name="l00296"></a>00296
<a name="l00297"></a>00297 <span class="comment">// Task priority set by the client. </span>
<a name="l00298"></a>00298 <span class="comment">// Where a client has two tasks with different priorities, </span>
<a name="l00299"></a>00299 <span class="comment">// the task with the higher priority will be executed first.</span>
<a name="l00300"></a>00300 <span class="keyword">const</span> TInt priority = 2;
<a name="l00301"></a>00301 taskInfo.iPriority = priority;
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KScheduleType,<span class="stringliteral">" transient schedule"</span>);
<a name="l00304"></a>00304 <span class="keyword">const</span> TDesC* <span class="keyword">transient</span> = &KScheduleType;
<a name="l00305"></a>00305 HBufC* data = <span class="keyword">transient</span>->AllocLC();
<a name="l00306"></a>00306
<a name="l00307"></a>00307 <span class="comment">// Schedule the item</span>
<a name="l00308"></a>00308 User::LeaveIfError(iScheduler.ScheduleTask(taskInfo, *data, ref, *cSchEntryInfoArray));
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="comment">// Change the start time and validity duration for the schedule</span>
<a name="l00311"></a>00311 offset = 19; <span class="comment">// 19 seconds in future</span>
<a name="l00312"></a>00312 now += TTimeIntervalSeconds(offset);
<a name="l00313"></a>00313 TTsTime newTime (now, ETrue);
<a name="l00314"></a>00314 entry.SetStartTime(newTime);
<a name="l00315"></a>00315 validity = 300;
<a name="l00316"></a>00316 entry.SetValidityPeriod(TTimeIntervalMinutes (validity));
<a name="l00317"></a>00317 cSchEntryInfoArray->AppendL(entry);
<a name="l00318"></a>00318
<a name="l00319"></a>00319 <span class="comment">// Change the transient time based schedule</span>
<a name="l00320"></a>00320 User::LeaveIfError(iScheduler.EditSchedule(ref.iHandle, *cSchEntryInfoArray));
<a name="l00321"></a>00321
<a name="l00322"></a>00322 CleanupStack::PopAndDestroy(2); <span class="comment">// data, CSchEntryInfoArray</span>
<a name="l00323"></a>00323
<a name="l00324"></a>00324 <span class="comment">// Check if the tasks scheduled exist</span>
<a name="l00325"></a>00325 TBool exists;
<a name="l00326"></a>00326 <a class="code" href="class_c_task_schedule.html#a3b047bd6e178cbc4964d69adb56e1945">DoesScheduledItemExistL</a>(ref, exists);
<a name="l00327"></a>00327 <span class="keywordflow">if</span>(!exists)
<a name="l00328"></a>00328 {
<a name="l00329"></a>00329 User::Leave(KErrNotFound);
<a name="l00330"></a>00330 }
<a name="l00331"></a>00331 <span class="comment">// Wait for the task to fire and complete</span>
<a name="l00332"></a>00332 iConsole->Printf(KTransientWait);
<a name="l00333"></a>00333 <span class="keyword">const</span> TInt twentySecs = 20000000;
<a name="l00334"></a>00334 User::After(twentySecs); <span class="comment">// pause for 20 seconds</span>
<a name="l00335"></a>00335
<a name="l00336"></a>00336 iConsole->Printf(KDone);
<a name="l00337"></a>00337
<a name="l00338"></a>00338 <span class="comment">// Transient schedules are deleted automatically once they are executed</span>
<a name="l00339"></a>00339 <span class="comment">// i.e check for count to be zero in the function being called</span>
<a name="l00340"></a>00340 <a class="code" href="class_c_task_schedule.html#a3b047bd6e178cbc4964d69adb56e1945">DoesScheduledItemExistL</a>(ref, exists);
<a name="l00341"></a>00341 <span class="keywordflow">if</span>(exists)
<a name="l00342"></a>00342 {
<a name="l00343"></a>00343 User::Leave(KErrGeneral);
<a name="l00344"></a>00344 }
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00353"></a><a class="code" href="class_c_task_schedule.html#a3b047bd6e178cbc4964d69adb56e1945">00353</a> <span class="keywordtype">void</span> <a class="code" href="class_c_task_schedule.html#a3b047bd6e178cbc4964d69adb56e1945">CTaskSchedule::DoesScheduledItemExistL</a>(TSchedulerItemRef &aRef, TBool& aExists)
<a name="l00354"></a>00354 <span class="comment">// Extract schedule references from the schedule server based on a filter.</span>
<a name="l00355"></a>00355 {
<a name="l00356"></a>00356 aExists = EFalse;
<a name="l00357"></a>00357 CArrayFixFlat<TSchedulerItemRef>* CSchItemRefArray;
<a name="l00358"></a>00358
<a name="l00359"></a>00359 CSchItemRefArray = <span class="keyword">new</span> CArrayFixFlat<TSchedulerItemRef>(3);
<a name="l00360"></a>00360 CleanupStack::PushL(CSchItemRefArray);
<a name="l00361"></a>00361
<a name="l00362"></a>00362 User::LeaveIfError(iScheduler.GetScheduleRefsL(*CSchItemRefArray, EAllSchedules));
<a name="l00363"></a>00363
<a name="l00364"></a>00364 TInt count = CSchItemRefArray->Count();
<a name="l00365"></a>00365 <span class="keywordflow">for</span>(TInt i = 0; i < count; i++)
<a name="l00366"></a>00366 {
<a name="l00367"></a>00367 <span class="comment">// Get a list of schedules created by this executable</span>
<a name="l00368"></a>00368 <span class="keywordflow">if</span>(aRef.iHandle == (*CSchItemRefArray)[i].iHandle)
<a name="l00369"></a>00369 {
<a name="l00370"></a>00370 aExists = ETrue;
<a name="l00371"></a>00371 iConsole->Printf(KExists);
<a name="l00372"></a>00372 iConsole->Printf(KTask, count);
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374 <span class="keywordflow">else</span>
<a name="l00375"></a>00375 {
<a name="l00376"></a>00376 iConsole->Printf(KOtherTask);
<a name="l00377"></a>00377 }
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379
<a name="l00380"></a>00380 CleanupStack::PopAndDestroy(); <span class="comment">// CSchItemRefArray</span>
<a name="l00381"></a>00381
<a name="l00382"></a>00382 }
<a name="l00383"></a>00383
<a name="l00395"></a><a class="code" href="class_c_task_schedule.html#a0c3db205409436a0b47b3e11c9d3190f">00395</a> <span class="keywordtype">void</span> <a class="code" href="class_c_task_schedule.html#a0c3db205409436a0b47b3e11c9d3190f">CTaskSchedule::DeleteSchedulesL</a>(TSchedulerItemRef &aRef, TScheduleFilter aFilter)
<a name="l00396"></a>00396 {
<a name="l00397"></a>00397 CArrayFixFlat<TSchedulerItemRef>* CSchItemRefArray;
<a name="l00398"></a>00398
<a name="l00399"></a>00399 CSchItemRefArray = <span class="keyword">new</span> CArrayFixFlat<TSchedulerItemRef>(3);
<a name="l00400"></a>00400 CleanupStack::PushL(CSchItemRefArray);
<a name="l00401"></a>00401
<a name="l00402"></a>00402 User::LeaveIfError(iScheduler.GetScheduleRefsL(*CSchItemRefArray, aFilter));
<a name="l00403"></a>00403
<a name="l00404"></a>00404 TInt count = CSchItemRefArray->Count();
<a name="l00405"></a>00405 iConsole->Printf(KTask, count);
<a name="l00406"></a>00406
<a name="l00407"></a>00407 <span class="keywordflow">for</span>(TInt i = 0; i < count; i++)
<a name="l00408"></a>00408 {
<a name="l00409"></a>00409 <span class="comment">// Check if the schedules are created by this exe or</span>
<a name="l00410"></a>00410 <span class="comment">// some other exe</span>
<a name="l00411"></a>00411 <span class="keywordflow">if</span>(aRef.iHandle == (*CSchItemRefArray)[i].iHandle)
<a name="l00412"></a>00412 {
<a name="l00413"></a>00413 <span class="comment">// Delete the tasks scheduled by us (this exe)</span>
<a name="l00414"></a>00414 iConsole->Printf(KDeleteAllTasks);
<a name="l00415"></a>00415 User::LeaveIfError(iScheduler.DeleteTask(aRef.iHandle));
<a name="l00416"></a>00416 <span class="comment">// Delete the schedules created by us (this exe)</span>
<a name="l00417"></a>00417 iConsole->Printf(KDeleteAllSchedules);
<a name="l00418"></a>00418 User::LeaveIfError(iScheduler.DeleteSchedule(aRef.iHandle));
<a name="l00419"></a>00419
<a name="l00420"></a>00420 iConsole->Printf(KPressAKey);
<a name="l00421"></a>00421 iConsole->Getch();
<a name="l00422"></a>00422
<a name="l00423"></a>00423 }
<a name="l00424"></a>00424 <span class="keywordflow">else</span>
<a name="l00425"></a>00425 {
<a name="l00426"></a>00426 <span class="comment">// Not deleting the tasks or schedules as,</span>
<a name="l00427"></a>00427 <span class="comment">// they are not created by this exe</span>
<a name="l00428"></a>00428 iConsole->Printf(KOtherTask);
<a name="l00429"></a>00429 }
<a name="l00430"></a>00430 }
<a name="l00431"></a>00431 CleanupStack::PopAndDestroy(); <span class="comment">// CSchItemRefArray</span>
<a name="l00432"></a>00432
<a name="l00433"></a>00433 }
<a name="l00434"></a>00434
<a name="l00435"></a><a class="code" href="taskscheduler_8cpp.html#a5fb473d4ee18739183215b04dcad6e12">00435</a> <span class="keywordtype">void</span> MainL()
<a name="l00436"></a>00436 {
<a name="l00437"></a>00437 <span class="comment">// Create an Active Scheduler to handle asychronous calls</span>
<a name="l00438"></a>00438 CActiveScheduler* scheduler = <span class="keyword">new</span> (ELeave) CActiveScheduler;
<a name="l00439"></a>00439 CleanupStack::PushL(scheduler);
<a name="l00440"></a>00440
<a name="l00441"></a>00441 <span class="comment">// Install the active scheduler</span>
<a name="l00442"></a>00442 CActiveScheduler::Install( scheduler );
<a name="l00443"></a>00443 <a class="code" href="class_c_task_schedule.html">CTaskSchedule</a>* app = <a class="code" href="class_c_task_schedule.html#ad152b61017146041468ce89a4312ddf9">CTaskSchedule::NewLC</a>();
<a name="l00444"></a>00444
<a name="l00445"></a>00445 <span class="comment">// Connect and register with the task scheduler</span>
<a name="l00446"></a>00446 app-><a class="code" href="class_c_task_schedule.html#ac957da1838fe31cb3f7fe9f6a533f6c5">ConnectAndRegisterL</a>();
<a name="l00447"></a>00447
<a name="l00448"></a>00448 <span class="comment">// Create a persistent schedule and add tasks to it</span>
<a name="l00449"></a>00449 app-><a class="code" href="class_c_task_schedule.html#a5b7869136d2a8f1c625531ab1c12ef98">PersistentScheduleL</a>();
<a name="l00450"></a>00450
<a name="l00451"></a>00451 <span class="comment">// Create a transient schedule and add tasks to it</span>
<a name="l00452"></a>00452 app-><a class="code" href="class_c_task_schedule.html#aabfef5ace0331f83eb8cd4de511d3d7f">CreateTransientScheduleL</a>();
<a name="l00453"></a>00453
<a name="l00454"></a>00454 CleanupStack::PopAndDestroy(2); <span class="comment">// app, scheduler</span>
<a name="l00455"></a>00455
<a name="l00456"></a>00456 }
<a name="l00457"></a>00457
<a name="l00458"></a><a class="code" href="taskscheduler_8cpp.html#a8b0fea7c5e4de0484888431020cf3ec9">00458</a> TInt E32Main()
<a name="l00459"></a>00459 {
<a name="l00460"></a>00460 __UHEAP_MARK;
<a name="l00461"></a>00461 CTrapCleanup* cleanup = CTrapCleanup::New();
<a name="l00462"></a>00462 <span class="keywordflow">if</span>(cleanup == NULL)
<a name="l00463"></a>00463 {
<a name="l00464"></a>00464 <span class="keywordflow">return</span> KErrNoMemory;
<a name="l00465"></a>00465 }
<a name="l00466"></a>00466
<a name="l00467"></a>00467 TRAPD(err, MainL());
<a name="l00468"></a>00468 <span class="keywordflow">if</span>(err != KErrNone)
<a name="l00469"></a>00469 {
<a name="l00470"></a>00470 User::Panic(_L(<span class="stringliteral">"Failed to complete"</span>),err);
<a name="l00471"></a>00471 }
<a name="l00472"></a>00472 <span class="keyword">delete</span> cleanup;
<a name="l00473"></a>00473
<a name="l00474"></a>00474 __UHEAP_MARKEND;
<a name="l00475"></a>00475 <span class="keywordflow">return</span> KErrNone;
<a name="l00476"></a>00476 }
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