Akonadi::Server::CollectionStatistics Class Reference

#include <collectionstatistics.h>

Public Member Functions
	CollectionStatistics (bool prefetch=true)
void	expireCache ()
void	invalidateCollection (const Collection &col)
void	itemAdded (const Collection &col, qint64 size, bool seen)
void	itemsSeenChanged (const Collection &col, qint64 seenCount)
Statistics	statistics (const Collection &col)

Protected Member Functions
virtual Statistics	calculateCollectionStatistics (const Collection &col)
QueryBuilder	prepareGenericQuery ()

Protected Attributes
QHash< qint64, Statistics >	mCache
QMutex	mCacheLock

Detailed Description

Provides cache for collection statistics.

Collection statistics are requested very often, so to take some load from the database we cache the results until the statistics are invalidated (see NotificationCollector, which takes care for invalidating the statistics).

The cache (together with optimization of the actual SQL query) seems to massively improve initial folder listing on system start (when IO and CPU loads are very high).

Definition at line 31 of file server/storage/collectionstatistics.h.

Constructor & Destructor Documentation

CollectionStatistics()

CollectionStatistics::CollectionStatistics ( bool prefetch = true )

explicit

Definition at line 20 of file server/storage/collectionstatistics.cpp.

Member Function Documentation

calculateCollectionStatistics()

CollectionStatistics::Statistics CollectionStatistics::calculateCollectionStatistics ( const Collection & col )

protectedvirtual

Definition at line 184 of file server/storage/collectionstatistics.cpp.

expireCache()

void CollectionStatistics::expireCache

(

)

Definition at line 117 of file server/storage/collectionstatistics.cpp.

invalidateCollection()

void CollectionStatistics::invalidateCollection

(

const Collection &

col

)

Definition at line 107 of file server/storage/collectionstatistics.cpp.

itemAdded()

void CollectionStatistics::itemAdded	(	const Collection &	col,
		qint64	size,
		bool	seen )

Definition at line 75 of file server/storage/collectionstatistics.cpp.

itemsSeenChanged()

void CollectionStatistics::itemsSeenChanged	(	const Collection &	col,
		qint64	seenCount )

Definition at line 92 of file server/storage/collectionstatistics.cpp.

prepareGenericQuery()

QueryBuilder CollectionStatistics::prepareGenericQuery ( )

protected

Definition at line 133 of file server/storage/collectionstatistics.cpp.

statistics()

CollectionStatistics::Statistics CollectionStatistics::statistics

(

const Collection &

col

)

Definition at line 123 of file server/storage/collectionstatistics.cpp.

Member Data Documentation

mCache

QHash<qint64, Statistics> Akonadi::Server::CollectionStatistics::mCache

protected

Definition at line 58 of file server/storage/collectionstatistics.h.

mCacheLock

QMutex Akonadi::Server::CollectionStatistics::mCacheLock

protected

Definition at line 57 of file server/storage/collectionstatistics.h.

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The documentation for this class was generated from the following files:

• server/storage/collectionstatistics.h
• server/storage/collectionstatistics.cpp