/* * 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(DatabaseContext*, const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize); virtual void trace(Visitor*) OVERRIDE; virtual bool openAndVerifyVersion(bool setVersionInNewDatabase, DatabaseError&, String& errorMessage) OVERRIDE FINAL; void close(); PassRefPtrWillBeRawPtr<SQLTransactionBackend> runTransaction(PassRefPtrWillBeRawPtr<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) OVERRIDE FINAL; void scheduleTransaction(); Deque<RefPtrWillBeMember<SQLTransactionBackend> > m_transactionQueue; Mutex m_transactionInProgressMutex; bool m_transactionInProgress; bool m_isTransactionQueueEnabled; friend class Database; }; } // namespace WebCore #endif // DatabaseBackend_h