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/*
* Copyright (C) 2010 Google 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 AND ITS CONTRIBUTORS "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 OR ITS 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 IDBTransactionBackendImpl_h
#define IDBTransactionBackendImpl_h
#if ENABLE(INDEXED_DATABASE)
#include "DOMStringList.h"
#include "IDBBackingStore.h"
#include "IDBTransactionBackendInterface.h"
#include "IDBTransactionCallbacks.h"
#include "Timer.h"
#include <wtf/Deque.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class IDBDatabaseBackendImpl;
class IDBTransactionBackendImpl : public IDBTransactionBackendInterface {
public:
static PassRefPtr<IDBTransactionBackendImpl> create(DOMStringList* objectStores, unsigned short mode, IDBDatabaseBackendImpl*);
virtual ~IDBTransactionBackendImpl();
virtual PassRefPtr<IDBObjectStoreBackendInterface> objectStore(const String& name, ExceptionCode&);
virtual unsigned short mode() const { return m_mode; }
virtual bool scheduleTask(PassOwnPtr<ScriptExecutionContext::Task> task, PassOwnPtr<ScriptExecutionContext::Task> abortTask);
virtual void didCompleteTaskEvents();
virtual void abort();
virtual void setCallbacks(IDBTransactionCallbacks* callbacks) { m_callbacks = callbacks; }
void run();
private:
IDBTransactionBackendImpl(DOMStringList* objectStores, unsigned short mode, IDBDatabaseBackendImpl*);
enum State {
Unused, // Created, but no tasks yet.
StartPending, // Enqueued tasks, but SQLite transaction not yet started.
Running, // SQLite transaction started but not yet finished.
Finished, // Either aborted or committed.
};
void start();
void commit();
void taskTimerFired(Timer<IDBTransactionBackendImpl>*);
void taskEventTimerFired(Timer<IDBTransactionBackendImpl>*);
RefPtr<DOMStringList> m_objectStoreNames;
unsigned short m_mode;
State m_state;
RefPtr<IDBTransactionCallbacks> m_callbacks;
RefPtr<IDBDatabaseBackendImpl> m_database;
typedef Deque<OwnPtr<ScriptExecutionContext::Task> > TaskQueue;
TaskQueue m_taskQueue;
TaskQueue m_abortTaskQueue;
RefPtr<IDBBackingStore::Transaction> m_transaction;
// FIXME: delete the timer once we have threads instead.
Timer<IDBTransactionBackendImpl> m_taskTimer;
Timer<IDBTransactionBackendImpl> m_taskEventTimer;
int m_pendingEvents;
};
} // namespace WebCore
#endif // ENABLE(INDEXED_DATABASE)
#endif // IDBTransactionBackendImpl_h
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