locationtriggering/ltcontainer/inc/lbtdboperationao.h
changeset 0 667063e416a2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/locationtriggering/ltcontainer/inc/lbtdboperationao.h	Tue Feb 02 01:06:48 2010 +0200
@@ -0,0 +1,119 @@
+/*
+* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  This header file describes the class that handles the 
+*                asynchronous operations on the triggers in database.
+*
+*/
+
+
+#ifndef C_LBTDB_OPERATION_AO_H
+#define C_LBTDB_OPERATION_AO_H
+
+#include <e32base.h>
+#include <d32dbms.h>
+
+// forward declaration
+class CLbtDbTriggersManager;
+
+/**
+ *  Execute the Database operations asynchronously
+ */
+NONSHARABLE_CLASS( CLbtDbOperationAO ) : public CActive
+    {
+public:
+    static CLbtDbOperationAO* NewL(
+        RDbDatabase& aDb,
+        CLbtDbTriggersManager* aObserver);
+
+    virtual ~CLbtDbOperationAO();
+
+    void ExecuteQuery(
+        RDbView& aView,
+        TDesC& aQuery);
+
+    TInt ExecuteSyncQuery(
+        RDbView& aView,
+        TDesC& aQuery);
+    void CompactDb();
+    
+    TBool IsCompactionOngoing();
+    
+protected:
+    /**
+     * Implements cancellation of an outstanding request.
+     */
+	virtual void DoCancel();
+
+    /**
+     * Handles completion of the Db operation request.
+     */
+	virtual void RunL();
+	
+	/**
+	 * Handles error in the execution of the Db operation
+	 */
+	virtual TInt RunError(TInt aError);
+
+private:
+
+    CLbtDbOperationAO(
+        RDbDatabase& aDb,
+        CLbtDbTriggersManager* aObserver);
+
+    void ConstructL();
+
+private:
+    enum TDbOperationType
+        {
+            EDbOperationNone = 0, // Currently ready to execute a Db operation
+            EDbSqlQuery = 1, // Executing a Sql Query on the Database
+            EDbCompaction = 2 // Executing a compaction operation on the database
+        };
+    
+private: // data
+    /** Handle to the Database */
+    RDbDatabase& iDb;
+
+    /** 
+     * The Database view which provides the interface to execute 
+     * the db operations.
+     * Does not own the Handle. This is just a reference.
+     */
+    RDbView* iView;
+    
+    /**
+     * The observer for the asynchronous operation.
+     * Does not own the observer object.
+     */
+    CLbtDbTriggersManager* iObserver; 
+
+    /**
+     * The Db handle to execute incremental operations on the database.
+     * Typical operations are on the database itself like compaction and
+     * recovery..
+     */
+    RDbIncremental iDbIncrOp;
+
+    /**
+     * Counts the remaining steps in the Incremental operation
+     */
+    TInt iSteps;
+
+    /**
+     * Indicates the type of async Db operation being performed by this object
+     */
+    TDbOperationType iOperation;
+    };
+
+#endif // C_LBTDB_OPERATION_AO_H