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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtAddOn.JsonDb module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QDebug>
#include <QFile>
#include <errno.h>
#include "jsondbbtree.h"
#include "jsondbsettings.h"
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
JsonDbBtree::JsonDbBtree()
: mBtree(new Btree())
{
#ifndef JSONDB_USE_HBTREE
mBtree->setAutoCompactRate(jsondbSettings->compactRate());
#endif
}
JsonDbBtree::~JsonDbBtree()
{
close();
delete mBtree;
}
void JsonDbBtree::setFileName(const QString &filename)
{
mBtree->setFileName(filename);
}
QString JsonDbBtree::fileName() const
{
return mBtree->fileName();
}
bool JsonDbBtree::open(OpenFlags flags)
{
#ifdef JSONDB_USE_HBTREE
HBtree::OpenMode mode = HBtree::ReadWrite;
if (flags & ReadOnly)
mode = HBtree::ReadOnly;
mBtree->setOpenMode(mode);
return mBtree->open();
#else
QBtree::DbFlags dbFlags = QBtree::UseSyncMarker | QBtree::NoSync;
if (flags & ReadOnly)
dbFlags |= QBtree::ReadOnly;
return mBtree->open(flags);
#endif
}
void JsonDbBtree::close()
{
Q_ASSERT(mBtree);
if (mBtree->isOpen())
mBtree->close();
}
bool JsonDbBtree::isOpen() const
{
return mBtree->isOpen();
}
bool JsonDbBtree::putOne(const QByteArray &key, const QByteArray &value)
{
bool inTransaction = mBtree->isWriting();
Transaction *txn = inTransaction ? mBtree->writeTransaction() : mBtree->beginWrite();
bool ok = txn->put(key, value);
if (!inTransaction) {
qWarning() << "JsonDbBtree::putOne" << "auto commiting tag 0";
ok &= txn->commit(0);
}
return ok;
}
bool JsonDbBtree::getOne(const QByteArray &key, QByteArray *value)
{
bool inTransaction = mBtree->isWriting();
Transaction *txn = inTransaction ? mBtree->writeTransaction() : mBtree->beginWrite();
bool ok = txn->get(key, value);
if (!inTransaction)
txn->abort();
return ok;
}
bool JsonDbBtree::removeOne(const QByteArray &key)
{
bool inTransaction = mBtree->isWriting();
Transaction *txn = inTransaction ? mBtree->writeTransaction() : mBtree->beginWrite();
bool ok = txn->remove(key);
if (!inTransaction){
qWarning() << "JsonDbBtree::removeOne" << "auto commiting tag 0";
ok &= txn->commit(0);
}
return ok;
}
bool JsonDbBtree::clearData()
{
Q_ASSERT(isWriting() == false);
#ifdef JSONDB_USE_HBTREE
return mBtree->clearData();
#else
QString fileName = mBtree->fileName();
if (QFile::exists(fileName)) {
close();
QFile::remove(fileName);
return mBtree->open();
}
return true;
#endif
}
bool JsonDbBtree::compact()
{
Q_ASSERT(mBtree);
#ifdef JSONDB_USE_HBTREE
return true;
#else
return mBtree->compact();
#endif
}
bool JsonDbBtree::rollback()
{
Q_ASSERT(mBtree && !isWriting());
return mBtree->rollback();
}
void JsonDbBtree::setAutoCompactRate(int rate) const
{
Q_ASSERT(mBtree);
#ifdef JSONDB_USE_HBTREE
Q_UNUSED(rate);
#else
mBtree->setAutoCompactRate(rate);
#endif
}
JsonDbBtree::Stat JsonDbBtree::stats() const
{
if (mBtree)
return mBtree->stats();
else
return Stat();
}
QT_END_NAMESPACE_JSONDB_PARTITION
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