1 /* 2 * Copyright (C) 2013 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef DatabaseBackend_h 27 #define DatabaseBackend_h 28 29 #include "modules/webdatabase/DatabaseBackendBase.h" 30 #include "wtf/Deque.h" 31 #include "wtf/text/WTFString.h" 32 33 namespace WebCore { 34 35 class ChangeVersionData; 36 class Database; 37 class DatabaseServer; 38 class SQLTransaction; 39 class SQLTransactionBackend; 40 class SQLTransactionClient; 41 class SQLTransactionCoordinator; 42 43 // FIXME: This implementation of DatabaseBackend is only a place holder 44 // for the split out of the Database backend to be done later. This 45 // place holder is needed to allow other code that need to reference the 46 // DatabaseBackend to do so before the proper backend split is 47 // available. This should be replaced with the actual implementation later. 48 49 class DatabaseBackend : public DatabaseBackendBase { 50 public: 51 DatabaseBackend(PassRefPtr<DatabaseContext>, const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize); 52 53 virtual bool openAndVerifyVersion(bool setVersionInNewDatabase, DatabaseError&, String& errorMessage); 54 void close(); 55 56 PassRefPtr<SQLTransactionBackend> runTransaction(PassRefPtr<SQLTransaction>, bool readOnly, const ChangeVersionData*); 57 void scheduleTransactionStep(SQLTransactionBackend*); 58 void inProgressTransactionCompleted(); 59 60 SQLTransactionClient* transactionClient() const; 61 SQLTransactionCoordinator* transactionCoordinator() const; 62 63 private: 64 class DatabaseOpenTask; 65 class DatabaseCloseTask; 66 class DatabaseTransactionTask; 67 class DatabaseTableNamesTask; 68 69 virtual bool performOpenAndVerify(bool setVersionInNewDatabase, DatabaseError&, String& errorMessage); 70 71 void scheduleTransaction(); 72 73 Deque<RefPtr<SQLTransactionBackend> > m_transactionQueue; 74 Mutex m_transactionInProgressMutex; 75 bool m_transactionInProgress; 76 bool m_isTransactionQueueEnabled; 77 78 friend class Database; 79 }; 80 81 } // namespace WebCore 82 83 #endif // DatabaseBackend_h 84