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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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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.
*/
#include "config.h"
#include "DatabaseSync.h"
#if ENABLE(SQL_DATABASE)
#include "DatabaseBackendContext.h"
#include "DatabaseBackendSync.h"
#include "DatabaseCallback.h"
#include "DatabaseContext.h"
#include "DatabaseManager.h"
#include "DatabaseTracker.h"
#include "Logging.h"
#include "SQLException.h"
#include "SQLTransactionSync.h"
#include "SQLTransactionSyncCallback.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/text/CString.h>
namespace WebCore {
PassRefPtr<DatabaseSync> DatabaseSync::create(ScriptExecutionContext*, PassRefPtr<DatabaseBackendBase> backend)
{
return static_cast<DatabaseSync*>(backend.get());
}
DatabaseSync::DatabaseSync(PassRefPtr<DatabaseBackendContext> databaseContext,
const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize)
: DatabaseBase(databaseContext->scriptExecutionContext())
, DatabaseBackendSync(databaseContext, name, expectedVersion, displayName, estimatedSize)
{
setFrontend(this);
}
DatabaseSync::~DatabaseSync()
{
ASSERT(m_scriptExecutionContext->isContextThread());
}
PassRefPtr<DatabaseBackendSync> DatabaseSync::backend()
{
return this;
}
void DatabaseSync::changeVersion(const String& oldVersion, const String& newVersion, PassRefPtr<SQLTransactionSyncCallback> changeVersionCallback, ExceptionCode& ec)
{
ASSERT(m_scriptExecutionContext->isContextThread());
if (sqliteDatabase().transactionInProgress()) {
setLastErrorMessage("unable to changeVersion from within a transaction");
ec = SQLException::DATABASE_ERR;
return;
}
RefPtr<SQLTransactionSync> transaction = SQLTransactionSync::create(this, changeVersionCallback, false);
if ((ec = transaction->begin())) {
ASSERT(!lastErrorMessage().isEmpty());
return;
}
String actualVersion;
if (!getVersionFromDatabase(actualVersion)) {
setLastErrorMessage("unable to read the current version", sqliteDatabase().lastError(), sqliteDatabase().lastErrorMsg());
ec = SQLException::UNKNOWN_ERR;
return;
}
if (actualVersion != oldVersion) {
setLastErrorMessage("current version of the database and `oldVersion` argument do not match");
ec = SQLException::VERSION_ERR;
return;
}
if ((ec = transaction->execute())) {
ASSERT(!lastErrorMessage().isEmpty());
return;
}
if (!setVersionInDatabase(newVersion)) {
setLastErrorMessage("unable to set the new version", sqliteDatabase().lastError(), sqliteDatabase().lastErrorMsg());
ec = SQLException::UNKNOWN_ERR;
return;
}
if ((ec = transaction->commit())) {
ASSERT(!lastErrorMessage().isEmpty());
setCachedVersion(oldVersion);
return;
}
setExpectedVersion(newVersion);
setLastErrorMessage("");
}
void DatabaseSync::transaction(PassRefPtr<SQLTransactionSyncCallback> callback, ExceptionCode& ec)
{
runTransaction(callback, false, ec);
}
void DatabaseSync::readTransaction(PassRefPtr<SQLTransactionSyncCallback> callback, ExceptionCode& ec)
{
runTransaction(callback, true, ec);
}
void DatabaseSync::runTransaction(PassRefPtr<SQLTransactionSyncCallback> callback, bool readOnly, ExceptionCode& ec)
{
ASSERT(m_scriptExecutionContext->isContextThread());
if (sqliteDatabase().transactionInProgress()) {
setLastErrorMessage("unable to start a transaction from within a transaction");
ec = SQLException::DATABASE_ERR;
return;
}
RefPtr<SQLTransactionSync> transaction = SQLTransactionSync::create(this, callback, readOnly);
if ((ec = transaction->begin()) || (ec = transaction->execute()) || (ec = transaction->commit())) {
ASSERT(!lastErrorMessage().isEmpty());
transaction->rollback();
}
setLastErrorMessage("");
}
void DatabaseSync::markAsDeletedAndClose()
{
// FIXME: need to do something similar to closeImmediately(), but in a sync way
}
class CloseSyncDatabaseOnContextThreadTask : public ScriptExecutionContext::Task {
public:
static PassOwnPtr<CloseSyncDatabaseOnContextThreadTask> create(PassRefPtr<DatabaseSync> database)
{
return adoptPtr(new CloseSyncDatabaseOnContextThreadTask(database));
}
virtual void performTask(ScriptExecutionContext*)
{
m_database->closeImmediately();
}
private:
CloseSyncDatabaseOnContextThreadTask(PassRefPtr<DatabaseSync> database)
: m_database(database)
{
}
RefPtr<DatabaseSync> m_database;
};
void DatabaseSync::closeImmediately()
{
ASSERT(m_scriptExecutionContext->isContextThread());
if (!opened())
return;
logErrorMessage("forcibly closing database");
closeDatabase();
}
} // namespace WebCore
#endif // ENABLE(SQL_DATABASE)
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