examples/Base/IPC/pubsub/publishpe.cpp

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/*
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Description: Demonstrates the pure event distribution pattern of publishing an integer property  
*/



#include "publishpe.h"

LOCAL_D CConsoleBase* console;

void DoExampleL()
        {
        console->Printf(KTxtPEPublish);
        RProperty myProperty;

        // Define the property and create a handle to it
        User::LeaveIfError(RProperty::Define(KMyPropertyCat, KMyPropertyName,RProperty::EInt,KAllowAllPolicy,KAllowAllPolicy));
        User::LeaveIfError(myProperty.Attach(KMyPropertyCat,KMyPropertyName,EOwnerThread));

        // The value of the property
        TInt value;

        // Publish the property after every 3 seconds
        for(TInt ix = 0; ix <= KMax ; ix += 20)
                {
                User::After(KTimeInterval);
                // Publish random values
                // In the pure event pattern of publishing, the value of the property is insignificant
                // Multiple publishing is only to let the subscriber know that an event has occurred
                value = Math::Random();
                console->Printf(KTxtInt,value);
                User::LeaveIfError(myProperty.Set(value));
                }

        // Free the handle to the property
        myProperty.Close();

        // The publisher has finished so delete the property
        User::LeaveIfError(RProperty::Delete(KMyPropertyCat,KMyPropertyName));
        }

GLDEF_C TInt E32Main()
        {
        __UHEAP_MARK;
        CTrapCleanup* cleanup = CTrapCleanup::New();

        TRAPD(createError, console = Console::NewL(KTextConsoleTitle, TSize(KConsFullScreen,KConsFullScreen)));
        if (createError)
                return createError;

        TRAPD(mainError, DoExampleL());
        if (mainError)
                console->Printf(KTextFailed, mainError);
        console->Printf(KTextPressAnyKey);
        console->Getch();

        delete console;
        delete cleanup;
        __UHEAP_MARKEND;
        return KErrNone;
        }

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