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/*
* Copyright (C) 2013 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 DatabaseBackend_h
#define DatabaseBackend_h
#include "modules/webdatabase/DatabaseBackendBase.h"
#include "wtf/Deque.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class ChangeVersionData;
class Database;
class DatabaseServer;
class SQLTransaction;
class SQLTransactionBackend;
class SQLTransactionClient;
class SQLTransactionCoordinator;
// FIXME: This implementation of DatabaseBackend is only a place holder
// for the split out of the Database backend to be done later. This
// place holder is needed to allow other code that need to reference the
// DatabaseBackend to do so before the proper backend split is
// available. This should be replaced with the actual implementation later.
class DatabaseBackend : public DatabaseBackendBase {
public:
DatabaseBackend(PassRefPtr<DatabaseContext>, const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize);
virtual bool openAndVerifyVersion(bool setVersionInNewDatabase, DatabaseError&, String& errorMessage);
void close();
PassRefPtr<SQLTransactionBackend> runTransaction(PassRefPtr<SQLTransaction>, bool readOnly, const ChangeVersionData*);
void scheduleTransactionStep(SQLTransactionBackend*);
void inProgressTransactionCompleted();
SQLTransactionClient* transactionClient() const;
SQLTransactionCoordinator* transactionCoordinator() const;
private:
class DatabaseOpenTask;
class DatabaseCloseTask;
class DatabaseTransactionTask;
class DatabaseTableNamesTask;
virtual bool performOpenAndVerify(bool setVersionInNewDatabase, DatabaseError&, String& errorMessage);
void scheduleTransaction();
Deque<RefPtr<SQLTransactionBackend> > m_transactionQueue;
Mutex m_transactionInProgressMutex;
bool m_transactionInProgress;
bool m_isTransactionQueueEnabled;
friend class Database;
};
} // namespace WebCore
#endif // DatabaseBackend_h
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