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/*
* Copyright (C) 2007, 2008, 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 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
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "modules/webdatabase/DatabaseTask.h"
#include "platform/Logging.h"
#include "modules/webdatabase/Database.h"
#include "modules/webdatabase/DatabaseContext.h"
#include "modules/webdatabase/DatabaseThread.h"
namespace blink {
DatabaseTask::DatabaseTask(DatabaseBackend* database, TaskSynchronizer* synchronizer)
: m_database(database)
, m_synchronizer(synchronizer)
#if !LOG_DISABLED
, m_complete(false)
#endif
{
}
DatabaseTask::~DatabaseTask()
{
#if !LOG_DISABLED
ASSERT(m_complete || !m_synchronizer);
#endif
}
void DatabaseTask::run()
{
// Database tasks are meant to be used only once, so make sure this one hasn't been performed before.
#if !LOG_DISABLED
ASSERT(!m_complete);
#endif
if (!m_synchronizer && !m_database->databaseContext()->databaseThread()->isDatabaseOpen(m_database.get())) {
taskCancelled();
#if !LOG_DISABLED
m_complete = true;
#endif
return;
}
WTF_LOG(StorageAPI, "Performing %s %p\n", debugTaskName(), this);
m_database->resetAuthorizer();
doPerformTask();
if (m_synchronizer)
m_synchronizer->taskCompleted();
#if !LOG_DISABLED
m_complete = true;
#endif
}
// *** DatabaseOpenTask ***
// Opens the database file and verifies the version matches the expected version.
DatabaseBackend::DatabaseOpenTask::DatabaseOpenTask(DatabaseBackend* database, bool setVersionInNewDatabase, TaskSynchronizer* synchronizer, DatabaseError& error, String& errorMessage, bool& success)
: DatabaseTask(database, synchronizer)
, m_setVersionInNewDatabase(setVersionInNewDatabase)
, m_error(error)
, m_errorMessage(errorMessage)
, m_success(success)
{
ASSERT(synchronizer); // A task with output parameters is supposed to be synchronous.
}
void DatabaseBackend::DatabaseOpenTask::doPerformTask()
{
String errorMessage;
m_success = database()->performOpenAndVerify(m_setVersionInNewDatabase, m_error, errorMessage);
if (!m_success)
m_errorMessage = errorMessage.isolatedCopy();
}
#if !LOG_DISABLED
const char* DatabaseBackend::DatabaseOpenTask::debugTaskName() const
{
return "DatabaseOpenTask";
}
#endif
// *** DatabaseCloseTask ***
// Closes the database.
DatabaseBackend::DatabaseCloseTask::DatabaseCloseTask(DatabaseBackend* database, TaskSynchronizer* synchronizer)
: DatabaseTask(database, synchronizer)
{
}
void DatabaseBackend::DatabaseCloseTask::doPerformTask()
{
Database::from(database())->close();
}
#if !LOG_DISABLED
const char* DatabaseBackend::DatabaseCloseTask::debugTaskName() const
{
return "DatabaseCloseTask";
}
#endif
// *** DatabaseTransactionTask ***
// Starts a transaction that will report its results via a callback.
DatabaseBackend::DatabaseTransactionTask::DatabaseTransactionTask(PassRefPtrWillBeRawPtr<SQLTransactionBackend> transaction)
: DatabaseTask(Database::from(transaction->database()), 0)
, m_transaction(transaction)
{
}
DatabaseBackend::DatabaseTransactionTask::~DatabaseTransactionTask()
{
}
void DatabaseBackend::DatabaseTransactionTask::doPerformTask()
{
m_transaction->performNextStep();
}
void DatabaseBackend::DatabaseTransactionTask::taskCancelled()
{
// If the task is being destructed without the transaction ever being run,
// then we must either have an error or an interruption. Give the
// transaction a chance to clean up since it may not have been able to
// run to its clean up state.
// Transaction phase 2 cleanup. See comment on "What happens if a
// transaction is interrupted?" at the top of SQLTransactionBackend.cpp.
m_transaction->notifyDatabaseThreadIsShuttingDown();
}
#if !LOG_DISABLED
const char* DatabaseBackend::DatabaseTransactionTask::debugTaskName() const
{
return "DatabaseTransactionTask";
}
#endif
// *** DatabaseTableNamesTask ***
// Retrieves a list of all tables in the database - for WebInspector support.
DatabaseBackend::DatabaseTableNamesTask::DatabaseTableNamesTask(DatabaseBackend* database, TaskSynchronizer* synchronizer, Vector<String>& names)
: DatabaseTask(database, synchronizer)
, m_tableNames(names)
{
ASSERT(synchronizer); // A task with output parameters is supposed to be synchronous.
}
void DatabaseBackend::DatabaseTableNamesTask::doPerformTask()
{
m_tableNames = Database::from(database())->performGetTableNames();
}
#if !LOG_DISABLED
const char* DatabaseBackend::DatabaseTableNamesTask::debugTaskName() const
{
return "DatabaseTableNamesTask";
}
#endif
} // namespace blink