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/*
* Copyright (C) 2007, 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.
* 3. Neither the name of Apple 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.
*/
#pragma once
#include "EventTarget.h"
#include "ExceptionOr.h"
#include "SQLCallbackWrapper.h"
#include "SQLTransactionBackend.h"
#include "SQLTransactionStateMachine.h"
#include "SQLValue.h"
#include <wtf/Optional.h>
namespace WebCore {
class Database;
class SQLError;
class SQLStatementCallback;
class SQLStatementErrorCallback;
class SQLTransactionBackend;
class SQLTransactionCallback;
class SQLTransactionErrorCallback;
class VoidCallback;
class SQLTransactionWrapper : public ThreadSafeRefCounted<SQLTransactionWrapper> {
public:
virtual ~SQLTransactionWrapper() { }
virtual bool performPreflight(SQLTransaction&) = 0;
virtual bool performPostflight(SQLTransaction&) = 0;
virtual SQLError* sqlError() const = 0;
virtual void handleCommitFailedAfterPostflight(SQLTransaction&) = 0;
};
class SQLTransaction : public ThreadSafeRefCounted<SQLTransaction>, public SQLTransactionStateMachine<SQLTransaction> {
public:
static Ref<SQLTransaction> create(Ref<Database>&&, RefPtr<SQLTransactionCallback>&&, RefPtr<VoidCallback>&& successCallback, RefPtr<SQLTransactionErrorCallback>&&, RefPtr<SQLTransactionWrapper>&&, bool readOnly);
~SQLTransaction();
ExceptionOr<void> executeSql(const String& sqlStatement, std::optional<Vector<SQLValue>>&& arguments, RefPtr<SQLStatementCallback>&&, RefPtr<SQLStatementErrorCallback>&&);
void lockAcquired();
void performNextStep();
void performPendingCallback();
Database& database() { return m_database; }
bool isReadOnly() const { return m_readOnly; }
void notifyDatabaseThreadIsShuttingDown();
// APIs called from the backend published via SQLTransaction:
void requestTransitToState(SQLTransactionState);
private:
friend class SQLTransactionBackend;
SQLTransaction(Ref<Database>&&, RefPtr<SQLTransactionCallback>&&, RefPtr<VoidCallback>&& successCallback, RefPtr<SQLTransactionErrorCallback>&&, RefPtr<SQLTransactionWrapper>&&, bool readOnly);
void enqueueStatement(std::unique_ptr<SQLStatement>);
void checkAndHandleClosedDatabase();
void clearCallbackWrappers();
void scheduleCallback(void (SQLTransaction::*)());
// State Machine functions:
StateFunction stateFunctionFor(SQLTransactionState) override;
void computeNextStateAndCleanupIfNeeded();
// State functions:
void acquireLock();
void openTransactionAndPreflight();
void runStatements();
void cleanupAndTerminate();
void cleanupAfterTransactionErrorCallback();
void deliverTransactionCallback();
void deliverTransactionErrorCallback();
void deliverStatementCallback();
void deliverQuotaIncreaseCallback();
void deliverSuccessCallback();
NO_RETURN_DUE_TO_ASSERT void unreachableState();
void getNextStatement();
bool runCurrentStatement();
void handleCurrentStatementError();
void handleTransactionError();
void postflightAndCommit();
void acquireOriginLock();
void releaseOriginLockIfNeeded();
#if !LOG_DISABLED
static const char* debugStepName(void (SQLTransaction::*)());
#endif
Ref<Database> m_database;
SQLCallbackWrapper<SQLTransactionCallback> m_callbackWrapper;
SQLCallbackWrapper<VoidCallback> m_successCallbackWrapper;
SQLCallbackWrapper<SQLTransactionErrorCallback> m_errorCallbackWrapper;
RefPtr<SQLTransactionWrapper> m_wrapper;
void (SQLTransaction::*m_nextStep)();
bool m_executeSqlAllowed { false };
RefPtr<SQLError> m_transactionError;
bool m_shouldRetryCurrentStatement { false };
bool m_modifiedDatabase { false };
bool m_lockAcquired { false };
bool m_readOnly { false };
bool m_hasVersionMismatch { false };
Lock m_statementMutex;
Deque<std::unique_ptr<SQLStatement>> m_statementQueue;
std::unique_ptr<SQLStatement> m_currentStatement;
std::unique_ptr<SQLiteTransaction> m_sqliteTransaction;
RefPtr<OriginLock> m_originLock;
SQLTransactionBackend m_backend;
};
} // namespace WebCore
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