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

5 files changed, 176 insertions, 27 deletions

diff --git a/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp b/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp
index dda23cc..abfd944 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp
+++ b/libopie2/opiepim/backend/ocontactaccessbackend_sql.cpp
@@ -300,22 +300,23 @@ namespace {
     FindQuery::~FindQuery() {
     }
     QString FindQuery::query()const{
-//      if ( m_uids.count() == 0 )
+	    if ( m_uids.count() == 0 )
         return single();
-    }
-    /*
       else
             return multi();
             }
+        
         QString FindQuery::multi()const {
-        QString qu = "select uid, type, value from addressbook where";
+	    QString qu = "select * from addressbook where";
         for (uint i = 0; i < m_uids.count(); i++ ) {
-            qu += " UID = " + QString::number( m_uids[i] ) + " OR";
+		    qu += " uid = " + QString::number( m_uids[i] ) + " OR";
         }
         qu.remove( qu.length()-2, 2 ); // Hmmmm..
+
+	    odebug << "find query: " << qu << "" << oendl;
         return qu;
     }
-    */
+
     QString FindQuery::single()const{
         QString qu = "select *";
         qu += " from addressbook where uid = " + QString::number(m_uid);
@@ -473,7 +474,7 @@ bool OPimContactAccessBackend_SQL::replace ( const OPimContact &contact )
 
 OPimContact OPimContactAccessBackend_SQL::find ( int uid ) const
 {
-    odebug << "OPimContactAccessBackend_SQL::find()" << oendl;
+    odebug << "OPimContactAccessBackend_SQL::find(" << uid << ")" << oendl;
     QTime t;
     t.start();
 
@@ -484,6 +485,47 @@ OPimContact OPimContactAccessBackend_SQL::find ( int uid ) const
     return retContact;
 }
 
+OPimContact OPimContactAccessBackend_SQL::find( int uid, const QArray<int>& queryUids, uint current, Frontend::CacheDirection direction ) const
+{
+    odebug << "OPimContactAccessBackend_SQL::find( ..multi.. )" << oendl;
+    odebug << "searching for " << uid << "" << oendl;
+
+    QTime t;
+    t.start();
+	
+    uint numReadAhead = readAhead();
+    QArray<int> searchList( numReadAhead );
+ 
+    uint size =0;
+
+    // Build an array with all elements which should be requested and cached
+    // We will just request "numReadAhead" elements, starting from "current" position in
+    // the list of many uids !
+    switch( direction ) {
+        /* forward */
+    case Frontend::Forward:
+        for ( uint i = current; i < queryUids.count() && size < numReadAhead; i++ ) {
+            searchList[size] = queryUids[i];
+            size++;
+        }
+        break;
+        /* reverse */
+    case Frontend::Reverse:
+        for ( uint i = current; i != 0 && size <  numReadAhead; i-- ) {
+            searchList[size] = queryUids[i];
+            size++;
+        }
+        break;
+    }
+
+    //Shrink to real size..
+    searchList.resize( size );
+
+    OPimContact retContact( requestContactsAndCache( uid, searchList ) );
+
+    odebug << "OPimContactAccessBackend_SQL::find( ..multi.. ) needed: " << t.elapsed() << " ms" << oendl;
+    return retContact;
+}
 
 
 QArray<int> OPimContactAccessBackend_SQL::queryByExample ( const OPimContact &query, int settings, const QDateTime& qd )
@@ -768,8 +810,6 @@ QMap<int, QString>  OPimContactAccessBackend_SQL::requestNonCustom( int uid ) co
     QTime t;
     t.start();
 
-    QMap<int, QString> nonCustomMap;
-
     int t2needed = 0;
     int t3needed = 0;
     QTime t2;
@@ -780,8 +820,67 @@ QMap<int, QString>  OPimContactAccessBackend_SQL::requestNonCustom( int uid ) co
 
     OSQLResultItem resItem = res_noncustom.first();
 
+    QMap<int, QString> nonCustomMap;
     QTime t3;
     t3.start();
+    nonCustomMap = fillNonCustomMap( resItem );
+    t3needed = t3.elapsed();
+    
+
+    // odebug << "Adding UID: " << resItem.data( "uid" ) << "" << oendl;
+    odebug << "RequestNonCustom needed: insg.:" << t.elapsed() << " ms, query: " << t2needed
+           << " ms, mapping: " << t3needed << " ms" << oendl;
+
+    return nonCustomMap;
+}
+
+/* Returns contact requested by uid and fills cache with contacts requested by uids in the cachelist */ 
+OPimContact OPimContactAccessBackend_SQL::requestContactsAndCache( int uid, const QArray<int>& uidlist )const
+{
+	// We want to get all contacts with one query.
+	// We don't have to add the given uid to the uidlist, it is expected to be there already (see opimrecordlist.h).
+	// All contacts will be stored in the cache, afterwards the contact with the user id "uid" will be returned
+	// by using the cache..  
+	QArray<int> cachelist = uidlist;
+
+	odebug << "Reqest and cache" << cachelist.size() << "elements !" << oendl;
+
+	QTime t;
+	t.start();
+
+	int t2needed = 0;
+	int t3needed = 0;
+	QTime t2;
+	t2.start();
+	FindQuery query( cachelist );
+	OSQLResult res_noncustom = m_driver->query( &query );
+	t2needed = t2.elapsed();
+
+	QMap<int, QString> nonCustomMap;
+	QTime t3;
+	t3.start();
+	OSQLResultItem resItem = res_noncustom.first();
+	do {
+		OPimContact contact( fillNonCustomMap( resItem ) );
+		contact.setExtraMap( requestCustom( contact.uid() ) );
+		odebug << "Caching uid: " << contact.uid() << oendl;
+		cache( contact );
+		resItem = res_noncustom.next();
+	} while ( ! res_noncustom.atEnd() ); //atEnd() is true if we are past(!) the list !!
+	t3needed = t3.elapsed();
+    
+
+	// odebug << "Adding UID: " << resItem.data( "uid" ) << "" << oendl;
+	odebug << "RequestContactsAndCache needed: insg.:" << t.elapsed() << " ms, query: " << t2needed
+	       << " ms, mapping: " << t3needed << " ms" << oendl;
+	
+	return cacheFind( uid );
+}
+
+QMap<int, QString> OPimContactAccessBackend_SQL::fillNonCustomMap( const OSQLResultItem& resultItem ) const
+{
+    QMap<int, QString> nonCustomMap;
+
     // Now loop through all columns
     QStringList fieldList = OPimContactFields::untrfields( false );
     QMap<QString, int> translate = OPimContactFields::untrFieldsToId();
@@ -790,7 +889,7 @@ QMap<int, QString>  OPimContactAccessBackend_SQL::requestNonCustom( int uid ) co
         // corresponding id into the map..
 
         int id =  translate[*it];
-        QString value = resItem.data( (*it) );
+        QString value = resultItem.data( (*it) );
 
         // odebug << "Reading " << (*it) << "... found: " << value << "" << oendl;
 
@@ -816,17 +915,12 @@ QMap<int, QString>  OPimContactAccessBackend_SQL::requestNonCustom( int uid ) co
         }
     }
 
-    // First insert uid
-    nonCustomMap.insert( Qtopia::AddressUid, resItem.data( "uid" ) );
-    t3needed = t3.elapsed();
-
-    // odebug << "Adding UID: " << resItem.data( "uid" ) << "" << oendl;
-    odebug << "RequestNonCustom needed: insg.:" << t.elapsed() << " ms, query: " << t2needed
-           << " ms, mapping: " << t3needed << " ms" << oendl;
+    nonCustomMap.insert( Qtopia::AddressUid, resultItem.data( "uid" ) );
 
     return nonCustomMap;
 }
 
+
 QMap<QString, QString>  OPimContactAccessBackend_SQL::requestCustom( int uid ) const
 {
     QTime t;
diff --git a/libopie2/opiepim/backend/ocontactaccessbackend_sql.h b/libopie2/opiepim/backend/ocontactaccessbackend_sql.h
index ba122ec..4f81735 100644
--- a/libopie2/opiepim/backend/ocontactaccessbackend_sql.h
+++ b/libopie2/opiepim/backend/ocontactaccessbackend_sql.h
@@ -73,8 +73,7 @@ class OPimContactAccessBackend_SQL : public OPimContactAccessBackend {
 	QArray<int> allRecords() const;
 
 	OPimContact find ( int uid ) const;
-	// FIXME: Add lookahead-cache support !
-	//OPimContact find(int uid, const QArray<int>&, uint cur, Frontend::CacheDirection )const;
+	OPimContact find( int uid, const QArray<int>&, uint cur, Frontend::CacheDirection ) const; 
 
 	QArray<int> queryByExample ( const OPimContact &query, int settings, 
 				     const QDateTime& d );
@@ -98,6 +97,8 @@ class OPimContactAccessBackend_SQL : public OPimContactAccessBackend {
 	QArray<int> extractUids( Opie::DB::OSQLResult& res ) const;
 	QMap<int, QString>  requestNonCustom( int uid ) const;
 	QMap<QString, QString>  requestCustom( int uid ) const;
+	QMap<int, QString> fillNonCustomMap( const Opie::DB::OSQLResultItem& resultItem ) const;
+	OPimContact requestContactsAndCache( int uid, const QArray<int>& cachelist ) const;
 	void update();
 
  protected:
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
@@ -128,9 +128,17 @@ public:
     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 );
@@ -164,6 +172,17 @@ 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 )
@@ -172,6 +191,7 @@ void OPimAccessBackend<T>::setSaneCacheSize( int 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>
diff --git a/libopie2/opiepim/core/opimaccesstemplate.h b/libopie2/opiepim/core/opimaccesstemplate.h
index 55d600a..6f01b46 100644
--- a/libopie2/opiepim/core/opimaccesstemplate.h
+++ b/libopie2/opiepim/core/opimaccesstemplate.h
@@ -35,7 +35,6 @@
 #include <opie2/opimaccessbackend.h>
 #include <opie2/opimrecordlist.h>
 
-#include <opie2/opimcache.h>
 #include <opie2/opimtemplatebase.h>
 #include <opie2/odebug.h>
 
@@ -128,6 +127,7 @@ public:
     virtual T find( int uid, const QArray<int>&,
                     uint current, typename OTemplateBase<T>::CacheDirection dir = OTemplateBase<T>::Forward )const;
 
+
     /* invalidate cache here */
     /**
      * clears the backend and invalidates the backend
@@ -140,12 +140,14 @@ public:
      * @return <i>true</i> if added successfully.
      */
     virtual bool add( const T& t ) ;
+
     bool add( const OPimRecord& );
-    // Needed for real generic access (eilers)
-    // Info: Take this if  you are working with OPimRecord, which is a generic base class, and
-    //       you need to add it into any database, you cannot generate a reference to
-    //       it and casting may be not approriate, too.
-    //       But take care that the accessing database is compatible to the real type of OPimRecord !!
+    /** 
+     * Add an Opie PimRecord.
+     * Info: Take this if  you are working with OPimRecords and you need to add it into any database.
+     *       But take care that the accessing database is compatible to the real type of OPimRecord !! 
+     *       Otherwise this access will be rejected !
+     */
     bool add( const OPimRecord* );
 
 
@@ -176,6 +178,7 @@ public:
     /**
      * @internal
      */
+    virtual T cacheFind( int uid )const;
     void cache( const T& )const;
     void setSaneCacheSize( int );
 
@@ -192,6 +195,7 @@ protected:
      */
     BackEnd* backEnd();
     BackEnd* m_backEnd;
+
     Cache m_cache;
 
 private:
@@ -218,7 +222,7 @@ bool OPimAccessTemplate<T>::load() {
 }
 template <class T>
 bool OPimAccessTemplate<T>::reload() {
-    invalidateCache();  // zecke: I think this should be added (se)
+    invalidateCache();
     return m_backEnd->reload();
 }
 template <class T>
@@ -251,10 +255,22 @@ OPimAccessTemplate<T>::queryByExample( const T& t, int settings, const QDateTime
 }
 template <class T>
 T OPimAccessTemplate<T>::find( int uid ) const{
+    // First search in cache..
+    if ( m_cache.contains( uid ) )
+	    return m_cache.find( uid );
+
     T t = m_backEnd->find( uid );
     cache( t );
+
     return t;
 }
+
+template <class T>
+T OPimAccessTemplate<T>::cacheFind( int uid ) const
+{
+	return m_cache.find( uid );
+}
+
 template <class T>
 T OPimAccessTemplate<T>::find( int uid, const QArray<int>& ar,
                                uint current, typename OTemplateBase<T>::CacheDirection dir )const {
@@ -290,6 +306,8 @@ bool OPimAccessTemplate<T>::add( const OPimRecord& rec) {
     if ( rec.rtti() == tempInstance.rtti() ) {
         const T& t = static_cast<const T&>(rec);
         return add(t);
+    } else {
+	owarn << "Adding not possible: Objecttype mismatch" << oendl;
     }
     return false;
 }
@@ -301,6 +319,8 @@ bool OPimAccessTemplate<T>::add( const OPimRecord* rec) {
     if ( rec -> rtti() == tempInstance.rtti() ) {
         const T* t = static_cast<const T*>(rec);
         return add( *t );
+    } else {
+	owarn << "Adding not possible: Objecttype mismatch" << oendl;
     }
     return false;
 }
diff --git a/libopie2/opiepim/core/opimtemplatebase.h b/libopie2/opiepim/core/opimtemplatebase.h
index b48dfed..ec9a94e 100644
--- a/libopie2/opiepim/core/opimtemplatebase.h
+++ b/libopie2/opiepim/core/opimtemplatebase.h
@@ -31,6 +31,7 @@
 
 /* OPIE */
 #include <opie2/opimrecord.h>
+#include <opie2/opimcache.h>
 
 /* QT */
 #include <qarray.h>
@@ -70,13 +71,15 @@ private:
 };
 /**
  * internal template base
- * T needs to implement the copy c'tor!!!
+ * Attention: T needs to implement the copy c'tor!!!
  */
 class OTemplateBasePrivate;
 template <class T = OPimRecord>
 class OTemplateBase : public OPimBase {
 public:
+    /** Look ahead direction of cache */ 
     enum CacheDirection { Forward=0, Reverse };
+
     OTemplateBase() {
     };
     virtual ~OTemplateBase() {
@@ -88,6 +91,16 @@ public:
      */
     virtual T find( int uid, const QArray<int>& items,
                     uint current, CacheDirection dir = Forward )const = 0;
+
+   /**
+    * Find in Cache..
+    * Returns empty object if nothing found.
+    */
+    virtual T cacheFind( int uid )const = 0;
+
+   /**
+    * Put element into Cache
+    */
     virtual void cache( const T& )const = 0;
     virtual void setSaneCacheSize( int ) = 0;
 
@@ -95,6 +108,7 @@ public:
     OPimRecord* record(int uid )const;
     static T* rec();
     
+    
 private:
     OTemplateBasePrivate *d;    
 };