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/*
* Copyright (C) 2007 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.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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 SQLTransaction_h
#define SQLTransaction_h
#if ENABLE(DATABASE)
#include <wtf/Threading.h>
#include "SQLiteTransaction.h"
#include "SQLStatement.h"
#include "SQLTransactionCallback.h"
#include "SQLTransactionErrorCallback.h"
#include <wtf/Deque.h>
#include <wtf/Forward.h>
#include <wtf/OwnPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
typedef int ExceptionCode;
class Database;
class SQLError;
class SQLStatementCallback;
class SQLStatementErrorCallback;
class SQLTransaction;
class SQLValue;
class String;
class VoidCallback;
class SQLTransactionWrapper : public ThreadSafeShared<SQLTransactionWrapper> {
public:
virtual ~SQLTransactionWrapper() { }
virtual bool performPreflight(SQLTransaction*) = 0;
virtual bool performPostflight(SQLTransaction*) = 0;
virtual SQLError* sqlError() const = 0;
};
class SQLTransaction : public ThreadSafeShared<SQLTransaction> {
public:
static PassRefPtr<SQLTransaction> create(Database*, PassRefPtr<SQLTransactionCallback>, PassRefPtr<SQLTransactionErrorCallback>,
PassRefPtr<VoidCallback>, PassRefPtr<SQLTransactionWrapper>, bool readOnly = false);
~SQLTransaction();
void executeSQL(const String& sqlStatement, const Vector<SQLValue>& arguments,
PassRefPtr<SQLStatementCallback> callback, PassRefPtr<SQLStatementErrorCallback> callbackError, ExceptionCode& e);
void lockAcquired();
bool performNextStep();
void performPendingCallback();
Database* database() { return m_database.get(); }
bool isReadOnly() { return m_readOnly; }
void notifyDatabaseThreadIsShuttingDown();
private:
SQLTransaction(Database*, PassRefPtr<SQLTransactionCallback>, PassRefPtr<SQLTransactionErrorCallback>,
PassRefPtr<VoidCallback>, PassRefPtr<SQLTransactionWrapper>, bool readOnly);
typedef void (SQLTransaction::*TransactionStepMethod)();
TransactionStepMethod m_nextStep;
void enqueueStatement(PassRefPtr<SQLStatement>);
void checkAndHandleClosedDatabase();
void acquireLock();
void openTransactionAndPreflight();
void deliverTransactionCallback();
void scheduleToRunStatements();
void runStatements();
void getNextStatement();
bool runCurrentStatement();
void handleCurrentStatementError();
void deliverStatementCallback();
void deliverQuotaIncreaseCallback();
void postflightAndCommit();
void deliverSuccessCallback();
void cleanupAfterSuccessCallback();
void handleTransactionError(bool inCallback);
void deliverTransactionErrorCallback();
void cleanupAfterTransactionErrorCallback();
#ifndef NDEBUG
static const char* debugStepName(TransactionStepMethod);
#endif
RefPtr<SQLStatement> m_currentStatement;
bool m_executeSqlAllowed;
RefPtr<Database> m_database;
RefPtr<SQLTransactionWrapper> m_wrapper;
RefPtr<SQLTransactionCallback> m_callback;
RefPtr<VoidCallback> m_successCallback;
RefPtr<SQLTransactionErrorCallback> m_errorCallback;
RefPtr<SQLError> m_transactionError;
bool m_shouldRetryCurrentStatement;
bool m_modifiedDatabase;
bool m_lockAcquired;
bool m_readOnly;
Mutex m_statementMutex;
Deque<RefPtr<SQLStatement> > m_statementQueue;
OwnPtr<SQLiteTransaction> m_sqliteTransaction;
};
} // namespace WebCore
#endif
#endif // SQLTransaction_h
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