1 /* 2 * Copyright (C) 2012 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 DatabaseManager_h 27 #define DatabaseManager_h 28 29 #include "modules/webdatabase/DatabaseContext.h" 30 #include "modules/webdatabase/DatabaseError.h" 31 #include "platform/heap/Handle.h" 32 #include "wtf/Assertions.h" 33 #include "wtf/Forward.h" 34 #include "wtf/HashMap.h" 35 #include "wtf/PassRefPtr.h" 36 37 namespace blink { 38 39 class Database; 40 class DatabaseCallback; 41 class DatabaseContext; 42 class ExceptionState; 43 class SecurityOrigin; 44 class ExecutionContext; 45 46 class DatabaseManager { 47 WTF_MAKE_NONCOPYABLE(DatabaseManager); WTF_MAKE_FAST_ALLOCATED; 48 public: 49 static DatabaseManager& manager(); 50 51 // These 2 methods are for DatabaseContext (un)registration, and should only 52 // be called by the DatabaseContext constructor and destructor. 53 void registerDatabaseContext(DatabaseContext*); 54 void unregisterDatabaseContext(DatabaseContext*); 55 56 #if ENABLE(ASSERT) 57 void didConstructDatabaseContext(); 58 void didDestructDatabaseContext(); 59 #else didConstructDatabaseContext()60 void didConstructDatabaseContext() { } didDestructDatabaseContext()61 void didDestructDatabaseContext() { } 62 #endif 63 64 static void throwExceptionForDatabaseError(DatabaseError, const String& errorMessage, ExceptionState&); 65 66 PassRefPtrWillBeRawPtr<Database> openDatabase(ExecutionContext*, const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize, DatabaseCallback*, DatabaseError&, String& errorMessage); 67 68 String fullPathForDatabase(SecurityOrigin*, const String& name, bool createIfDoesNotExist = true); 69 70 private: 71 DatabaseManager(); 72 ~DatabaseManager(); 73 74 // This gets a DatabaseContext for the specified ExecutionContext. 75 // If one doesn't already exist, it will create a new one. 76 DatabaseContext* databaseContextFor(ExecutionContext*); 77 // This gets a DatabaseContext for the specified ExecutionContext if 78 // it already exist previously. Otherwise, it returns 0. 79 DatabaseContext* existingDatabaseContextFor(ExecutionContext*); 80 81 PassRefPtrWillBeRawPtr<Database> openDatabaseInternal(ExecutionContext*, 82 const String& name, const String& expectedVersion, const String& displayName, 83 unsigned long estimatedSize, bool setVersionInNewDatabase, DatabaseError&, String& errorMessage); 84 85 static void logErrorMessage(ExecutionContext*, const String& message); 86 87 typedef WillBePersistentHeapHashMap<ExecutionContext*, RefPtrWillBeMember<DatabaseContext> > ContextMap; 88 ContextMap m_contextMap; 89 #if ENABLE(ASSERT) 90 int m_databaseContextRegisteredCount; 91 int m_databaseContextInstanceCount; 92 #endif 93 }; 94 95 } // namespace blink 96 97 #endif // DatabaseManager_h 98