Added lookahead caching for addressbook (SQL-only) for speed improvement.

1 files changed, 20 insertions, 0 deletions

diff --git a/libopie2/opiepim/backend/opimaccessbackend.h b/libopie2/opiepim/backend/opimaccessbackend.h
index 0682063..15a7b7f 100644
--- a/libopie2/opiepim/backend/opimaccessbackend.h
+++ b/libopie2/opiepim/backend/opimaccessbackend.h
@@ -125,15 +125,23 @@ public:
     /**
      * set the read ahead count
      */
     void setReadAhead( uint count );
 protected:
     int access()const;
+
     void cache( const T& t )const;
 
     /**
+     * Returns the element with given uid out of the cache.
+     * Returns empty element if nothing was found.
+     * <b>Attention:</b> This just works if we have a frontend which contains the cache !
+     */
+    T cacheFind( int uid ) const;
+
+    /**
      * use a prime number here!
      */
     void setSaneCacheSize( int );
 
     uint readAhead()const;
 
@@ -161,20 +169,32 @@ void OPimAccessBackend<T>::setFrontend( Frontend* fr ) {
 }
 template <class T>
 void OPimAccessBackend<T>::cache( const T& t )const {
     if (m_front )
         m_front->cache( t );
 }
+
+template <class T>
+T OPimAccessBackend<T>::cacheFind( int uid )const {
+        if ( ! m_front ){
+                qWarning ( "No frontend assigned ! Therefore we cannot access the cache to return the right element!" );
+                return T();
+        }
+
+        return m_front->cacheFind( uid );
+}
+
 template <class T>
 void OPimAccessBackend<T>::setSaneCacheSize( int size) {
     if (m_front )
         m_front->setSaneCacheSize( size );
 }
 template <class T>
 T OPimAccessBackend<T>::find( int uid, const QArray<int>&,
                               uint, typename Frontend::CacheDirection )const {
+    qDebug( "*** Lookahead feature not supported. Fallback to default find!" );
     return find( uid );
 }
 template <class T>
 void OPimAccessBackend<T>::setReadAhead( uint count ) {
     m_read = count;
 }