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/*
* Copyright (C) 2008, 2009, 2010 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef StorageAreaSync_h
#define StorageAreaSync_h
#include <WebCore/SQLiteDatabase.h>
#include <WebCore/Timer.h>
#include <wtf/Condition.h>
#include <wtf/HashMap.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
class Frame;
class StorageAreaImpl;
class StorageSyncManager;
class StorageAreaSync : public ThreadSafeRefCounted<StorageAreaSync> {
public:
static Ref<StorageAreaSync> create(PassRefPtr<StorageSyncManager>, PassRefPtr<StorageAreaImpl>, const String& databaseIdentifier);
~StorageAreaSync();
void scheduleFinalSync();
void blockUntilImportComplete();
void scheduleItemForSync(const String& key, const String& value);
void scheduleClear();
void scheduleCloseDatabase();
void scheduleSync();
private:
StorageAreaSync(PassRefPtr<StorageSyncManager>, PassRefPtr<StorageAreaImpl>, const String& databaseIdentifier);
Timer m_syncTimer;
HashMap<String, String> m_changedItems;
bool m_itemsCleared;
bool m_finalSyncScheduled;
RefPtr<StorageAreaImpl> m_storageArea;
RefPtr<StorageSyncManager> m_syncManager;
// The database handle will only ever be opened and used on the background thread.
SQLiteDatabase m_database;
// The following members are subject to thread synchronization issues.
public:
// Called from the background thread
void performImport();
void performSync();
void deleteEmptyDatabase();
private:
enum OpenDatabaseParamType {
CreateIfNonExistent,
SkipIfNonExistent
};
void syncTimerFired();
void openDatabase(OpenDatabaseParamType openingStrategy);
void sync(bool clearItems, const HashMap<String, String>& items);
const String m_databaseIdentifier;
Lock m_syncLock;
HashMap<String, String> m_itemsPendingSync;
bool m_clearItemsWhileSyncing;
bool m_syncScheduled;
bool m_syncInProgress;
bool m_databaseOpenFailed;
bool m_syncCloseDatabase;
mutable Lock m_importLock;
Condition m_importCondition;
bool m_importComplete;
void markImported();
void migrateItemTableIfNeeded();
};
} // namespace WebCore
#endif // StorageAreaSync_h
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