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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 "qjsondbprivatepartition_p.h"
#include "qjsondbconnection_p.h"
#include "qjsondbrequest_p.h"
#include "qjsondbflushrequest_p.h"
#include "qjsondbstrings_p.h"
#include "qjsondbstandardpaths_p.h"
#include "jsondbowner.h"
#include "jsondbpartition.h"
#include "jsondbquery.h"
#include "jsondbqueryparser.h"
#include <qdir.h>
QT_BEGIN_NAMESPACE_JSONDB
QJsonDbPrivatePartition::QJsonDbPrivatePartition(QObject *parent)
: QObject(parent), partitionOwner(0), privatePartition(0)
{
}
QJsonDbPrivatePartition::~QJsonDbPrivatePartition()
{
}
void QJsonDbPrivatePartition::handleRequest(const QJsonObject &request)
{
QString partitionName = request.value(JsonDbStrings::Protocol::partition()).toString();
int requestId = static_cast<int>(request.value(JsonDbStrings::Protocol::requestId()).toDouble());
QString errorMessage;
QJsonDbRequest::ErrorCode errorCode = ensurePartition(partitionName, errorMessage);
if (errorCode == QJsonDbRequest::NoError) {
QList<QJsonObject> results;
const QString protocolAction = request.value(JsonDbStrings::Protocol::action()).toString();
if (protocolAction == JsonDbStrings::Protocol::update()) {
Partition::JsonDbObjectList objects;
QJsonArray objectArray = request.value(JsonDbStrings::Protocol::object()).toArray();
if (objectArray.isEmpty())
objectArray.append(request.value(JsonDbStrings::Protocol::object()).toObject());
foreach (const QJsonValue &val, objectArray)
objects.append(val.toObject());
Partition::JsonDbPartition::ConflictResolutionMode writeMode =
request.value(JsonDbStrings::Protocol::conflictResolutionMode()).toString() == JsonDbStrings::Protocol::replace() ?
Partition::JsonDbPartition::Replace : Partition::JsonDbPartition::RejectStale;
Partition::JsonDbWriteResult writeResults = privatePartition->updateObjects(privatePartition->defaultOwner(), objects, writeMode);
if (writeResults.code == Partition::JsonDbError::NoError) {
emit writeRequestStarted(requestId, writeResults.state);
results.reserve(writeResults.objectsWritten.count());
foreach (const Partition::JsonDbObject &object, writeResults.objectsWritten)
results.append(object);
emit resultsAvailable(requestId, results);
} else {
errorCode = static_cast<QJsonDbRequest::ErrorCode>(writeResults.code);
errorMessage = writeResults.message;
}
} else if (protocolAction == JsonDbStrings::Protocol::query()) {
QJsonObject object = request.value(JsonDbStrings::Protocol::object()).toObject();
QMap<QString, QJsonValue> bindings;
QJsonObject jsonbindings = object.value(JsonDbStrings::Property::bindings()).toObject();
for (QJsonObject::const_iterator it = jsonbindings.constBegin(), e = jsonbindings.constEnd(); it != e; ++it)
bindings.insert(it.key(), it.value());
int limit = -1;
int offset = 0;
if (request.contains(JsonDbStrings::Property::queryLimit()))
limit = request.value(JsonDbStrings::Property::queryLimit()).toDouble();
if (request.contains(JsonDbStrings::Property::queryOffset()))
offset = request.value(JsonDbStrings::Property::queryOffset()).toDouble();
Partition::JsonDbQueryParser parser;
parser.setQuery(object.value(JsonDbStrings::Property::query()).toString());
parser.setBindings(bindings);
parser.parse(); // parse errors can be handled in queryObjects
Partition::JsonDbQueryResult queryResult = privatePartition->queryObjects(privatePartition->defaultOwner(),
parser.result(), limit, offset);
if (queryResult.code == Partition::JsonDbError::NoError) {
emit readRequestStarted(requestId, queryResult.state, queryResult.sortKeys.at(0));
results.reserve(queryResult.data.count());
foreach (const Partition::JsonDbObject &val, queryResult.data)
results.append(val);
emit resultsAvailable(requestId, results);
} else {
errorCode = static_cast<QJsonDbRequest::ErrorCode>(queryResult.code);
errorMessage = queryResult.message;
}
} else if (protocolAction == JsonDbStrings::Protocol::flush()) {
bool ok = false;
int stateNumber = privatePartition->flush(&ok);
if (ok) {
emit flushRequestStarted(requestId, static_cast<quint32>(stateNumber));
emit finished(requestId);
} else {
emit error(requestId, static_cast<QJsonDbRequest::ErrorCode>(QJsonDbFlushRequest::FlushFailed),
QStringLiteral("Flush failed"));
}
} else {
qWarning() << "Received unhandled private partition request" << protocolAction << request;
}
}
if (errorCode == QJsonDbRequest::NoError) {
emit finished(requestId);
} else {
emit error(requestId, errorCode, errorMessage);
}
}
QtJsonDb::QJsonDbRequest::ErrorCode QJsonDbPrivatePartition::ensurePartition(const QString &partitionName, QString &message)
{
Q_ASSERT(!partitionName.isEmpty());
QString user;
QString fullPartitionName;
if (partitionName == JsonDbStrings::Partition::privatePartition()) {
user = QJsonDbStandardPaths::currentUser();
fullPartitionName = user + JsonDbStrings::Partition::dotPrivatePartition();
} else {
Q_ASSERT(partitionName.endsWith(JsonDbStrings::Partition::dotPrivatePartition()));
fullPartitionName = partitionName;
user = partitionName.mid(0, partitionName.size() - JsonDbStrings::Partition::dotPrivatePartition().size());
}
// only keep a single private partition open at a time. This will cut down
// on file contention and also keep the memory usage of the client under control
if (privatePartition && privatePartition->partitionSpec().name != fullPartitionName) {
delete privatePartition;
privatePartition = 0;
}
if (!privatePartition) {
QString home = QJsonDbStandardPaths::homePath(user);
if (home.isEmpty()) {
message = QStringLiteral("Private partition not found");
return QJsonDbRequest::InvalidPartition;
}
QDir homeDir(home);
homeDir.mkpath(QStringLiteral(".jsondb"));
homeDir.cd(QStringLiteral(".jsondb"));
if (!partitionOwner) {
partitionOwner = new Partition::JsonDbOwner(this);
partitionOwner->setAllowAll(true);
}
Partition::JsonDbPartitionSpec spec;
spec.name = fullPartitionName;
spec.path = homeDir.absolutePath();
privatePartition = new Partition::JsonDbPartition(this);
privatePartition->setPartitionSpec(spec);
privatePartition->setDefaultOwner(partitionOwner);
privatePartition->setObjectName(QStringLiteral("private"));
if (!privatePartition->open()) {
delete privatePartition;
privatePartition = 0;
message = QStringLiteral("Unable to open private partition");
return QJsonDbRequest::InvalidPartition;
}
}
return QJsonDbRequest::NoError;
}
#include "moc_qjsondbprivatepartition_p.cpp"
QT_END_NAMESPACE_JSONDB
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