TB10.1 Example Applications: examples/Base/IPC/pubsub/publishpe.cpp Source File

00001 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+00002 // All rights reserved.
+00003 // This component and the accompanying materials are made available
+00004 // under the terms of "Eclipse Public License v1.0"
+00005 // which accompanies this distribution, and is available
+00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
+00007 //
+00008 // Initial Contributors:
+00009 // Nokia Corporation - initial contribution.
+00010 //
+00011 // Contributors:
+00012 //
+00013 // Description:
+00014 // Demonstrates the pure event distribution pattern of publishing an integer property
+00015 //
+00016 
+00017 
+00018 
+00023 #include "publishpe.h"
+00024 
+00025 LOCAL_D CConsoleBase* console;
+00026 
+00027 void DoExampleL()
+00028         {
+00029         console->Printf(KTxtPEPublish);
+00030         RProperty myProperty;
+00031 
+00032         // Define the property and create a handle to it
+00033         User::LeaveIfError(RProperty::Define(KMyPropertyCat, KMyPropertyName,RProperty::EInt,KAllowAllPolicy,KAllowAllPolicy));
+00034         User::LeaveIfError(myProperty.Attach(KMyPropertyCat,KMyPropertyName,EOwnerThread));
+00035 
+00036         // The value of the property
+00037         TInt value;
+00038 
+00039         // Publish the property after every 3 seconds
+00040         for(TInt ix = 0; ix <= KMax ; ix += 20)
+00041                 {
+00042                 User::After(KTimeInterval);
+00043                 // Publish random values
+00044                 // In the pure event pattern of publishing, the value of the property is insignificant
+00045                 // Multiple publishing is only to let the subscriber know that an event has occurred
+00046                 value = Math::Random();
+00047                 console->Printf(KTxtInt,value);
+00048                 User::LeaveIfError(myProperty.Set(value));
+00049                 }
+00050 
+00051         // Free the handle to the property
+00052         myProperty.Close();
+00053 
+00054         // The publisher has finished so delete the property
+00055         User::LeaveIfError(RProperty::Delete(KMyPropertyCat,KMyPropertyName));
+00056         }
+00057 
+00058 GLDEF_C TInt E32Main()
+00059         {
+00060         __UHEAP_MARK;
+00061         CTrapCleanup* cleanup = CTrapCleanup::New();
+00062 
+00063         TRAPD(createError, console = Console::NewL(KTextConsoleTitle, TSize(KConsFullScreen,KConsFullScreen)));
+00064         if (createError)
+00065                 return createError;
+00066 
+00067         TRAPD(mainError, DoExampleL());
+00068         if (mainError)
+00069                 console->Printf(KTextFailed, mainError);
+00070         console->Printf(KTextPressAnyKey);
+00071         console->Getch();
+00072 
+00073         delete console;
+00074         delete cleanup;
+00075         __UHEAP_MARKEND;
+00076         return KErrNone;
+00077         }
+