CEvtDbNotifier Class Reference

class CEvtDbNotifier : public CActive

Class that monitors Storage Database for any change. This class requests for any change in the Stroage database.

evtstorage.lib
Since
S60 v9.1

Inherits from

Constructor & Destructor Documentation

CEvtDbNotifier(MEvtDbObserver &)

CEvtDbNotifier(MEvtDbObserver &aObserver)[private]

Default C++ Constructor.

Parameters

MEvtDbObserver & aObserver

~CEvtDbNotifier()

~CEvtDbNotifier()[virtual]

Destructor

Member Functions Documentation

ConstructL()

voidConstructL()[private]

Second phase of the two phase constructor.

DbChangedL()

voidDbChangedL()

Observer for TDbChangeType changes in Storage Database.

DoCancel()

voidDoCancel()[virtual]

Implements cancellation of an outstanding request.

This function is called as part of the active object's Cancel().

It must call the appropriate cancel function offered by the active object's asynchronous service provider. The asynchronous service provider's cancel is expected to act immediately.

DoCancel() must not wait for event completion; this is handled by Cancel().

CActive::Cancel

HandleDbChangedL()

voidHandleDbChangedL()[private]

Handle any change to database.

NewL(MEvtDbObserver &)

CEvtDbNotifier *NewL(MEvtDbObserver &aObserver)[static]

Constructs a new instance of Event Notifier.

leave
System wide error code if the object creation fails.

Parameters

MEvtDbObserver & aObserver

NewLC(MEvtDbObserver &)

CEvtDbNotifier *NewLC(MEvtDbObserver &aObserver)[static]

Constructs a new instance of Event Notifier. Leaves the created instance on the cleanup stack.

leave
System wide error code if the object creation fails.

Parameters

MEvtDbObserver & aObserver

RunError(TInt)

TInt RunError(TIntaError)[virtual]

Parameters

TInt aError

RunL()

voidRunL()[virtual]

Handles an active object's request completion event.

A derived class must provide an implementation to handle the completed request. If appropriate, it may issue another request.

The function is called by the active scheduler when a request completion event occurs, i.e. after the active scheduler's WaitForAnyRequest() function completes.

Before calling this active object's RunL() function, the active scheduler has:

1. decided that this is the highest priority active object with a completed request

2. marked this active object's request as complete (i.e. the request is no longer outstanding)

RunL() runs under a trap harness in the active scheduler. If it leaves, then the active scheduler calls RunError() to handle the leave.

Note that once the active scheduler's Start() function has been called, all user code is run under one of the program's active object's RunL() or RunError() functions.

CActiveScheduler::Start CActiveScheduler::Error CActiveScheduler::WaitForAnyRequest TRAPD

StartNotification()

voidStartNotification()[private]

Request to get database notifications on change.

Member Data Documentation

MEvtDbObserver & iDbObserver

MEvtDbObserver &iDbObserver[private]

Reference to Observer Does Not own

CRepository * iRepository

CRepository *iRepository[private]

CRepository Instance