261 lines
8.9 KiB
C++
261 lines
8.9 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// storage.cpp //
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// //
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// Copyright (C) 2010 Brian Pritchett <batenkaitos@gmail.com> //
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// Copyright (C) 2010 Marco Martin <mart@kde.org> //
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// //
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// This library is free software; you can redistribute it and/or //
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// modify it under the terms of the GNU Lesser General Public //
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// License as published by the Free Software Foundation; either //
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// version 2.1 of the License, or (at your option) any later version. //
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// //
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// This library is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU //
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// Lesser General Public License for more details. //
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// //
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// You should have received a copy of the GNU Lesser General Public //
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// License along with this library; if not, write to the Free Software //
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA //
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// 02110-1301 USA //
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/////////////////////////////////////////////////////////////////////////
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#include "private/storage_p.h"
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//Qt
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#include <QSqlError>
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#include <QSqlQuery>
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#include <QSqlRecord>
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#include <QThreadStorage>
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//KDE
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#include <kdebug.h>
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#include <kstandarddirs.h>
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//Plasma
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#include "applet.h"
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#include "dataengine.h"
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#include "abstractrunner.h"
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class RefCountedDatabase
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{
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public:
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void ref()
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{
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if (m_ref == 0) {
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m_db = QSqlDatabase::addDatabase("QSQLITE", QString("plasma-storage-%1").arg((ulong)this));
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m_db.setDatabaseName(KStandardDirs::locateLocal("appdata", "plasma-storage.db"));
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}
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//Q_ASSERT(db.isValid());
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m_ref.ref();
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}
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bool deref()
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{
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//kill the database if the last one in use
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bool last = !m_ref.deref();
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if (last) {
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m_db.close();
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QString name = m_db.connectionName();
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m_db = QSqlDatabase();
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QSqlDatabase::removeDatabase(name);
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}
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return !last;
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}
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inline QSqlDatabase *database()
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{
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return &m_db;
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}
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private:
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QSqlDatabase m_db;
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QAtomicInt m_ref;
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};
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static QThreadStorage<RefCountedDatabase *> s_databasePool;
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//Storage Job implentation
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StorageJob::StorageJob(const QString& destination,
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const QString& operation,
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const QMap<QString, QVariant>& parameters,
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QObject *parent)
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: ServiceJob(destination, operation, parameters, parent),
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m_clientName(destination)
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{
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m_rdb = s_databasePool.localData();
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if (m_rdb == 0) {
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s_databasePool.setLocalData(new RefCountedDatabase);
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m_rdb = s_databasePool.localData();
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}
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m_rdb->ref();
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if (!m_rdb->database()->open()) {
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kWarning() << "Unable to open the plasma storage cache database: " << m_rdb->database()->lastError();
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} else if (!m_rdb->database()->tables().contains(m_clientName)) {
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QSqlQuery query(*m_rdb->database());
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//bindValue doesn't seem to be able to replace stuff in create table
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query.prepare(QString("create table ")+m_clientName+" (valueGroup varchar(256), id varchar(256), data clob, creationTime datetime, accessTime datetime, primary key (valueGroup, id))");
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query.exec();
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}
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}
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StorageJob::~StorageJob()
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{
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if (!m_rdb->deref()) {
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s_databasePool.setLocalData(0);
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}
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}
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void StorageJob::start()
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{
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if (!m_rdb->database()->isOpen()) {
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return;
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}
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QMap<QString, QVariant> params = parameters();
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QString valueGroup = params["group"].toString();
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if (valueGroup.isEmpty()) {
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valueGroup = "default";
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}
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if (operationName() == "save") {
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QSqlQuery query(*m_rdb->database());
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query.prepare("delete from "+m_clientName+" where valueGroup=:valueGroup and id = :id");
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query.bindValue(":valueGroup", valueGroup);
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query.bindValue(":id", params["key"].toString());
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query.exec();
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query.prepare("insert into "+m_clientName+" values(:valueGroup, :id, :datavalue, date('now'), date('now'))");
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query.bindValue(":id", params["key"].toString());
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query.bindValue(":valueGroup", valueGroup);
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query.bindValue(":datavalue", params["data"].toString());
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const bool success = query.exec();
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setResult(success);
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} else if (operationName() == "retrieve") {
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QSqlQuery query(*m_rdb->database());
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//a bit redundant but should be the faster way with less string concatenation as possible
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if (params["key"].toString().isEmpty()) {
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//update modification time
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query.prepare("update "+m_clientName+" set accessTime=date('now') where valueGroup=:valueGroup");
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query.bindValue(":valueGroup", valueGroup);
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query.exec();
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query.prepare("select * from "+m_clientName+" where valueGroup=:valueGroup");
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query.bindValue(":valueGroup", valueGroup);
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} else {
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//update modification time
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query.prepare("update "+m_clientName+" set accessTime=date('now') where valueGroup=:valueGroup and id=:key");
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query.bindValue(":valueGroup", valueGroup);
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query.bindValue(":key", params["key"].toString());
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query.exec();
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query.prepare("select * from "+m_clientName+" where valueGroup=:valueGroup and id=:key");
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query.bindValue(":valueGroup", valueGroup);
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query.bindValue(":key", params["key"].toString());
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}
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const bool success = query.exec();
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QHash<QString, QVariant> h;
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if (success) {
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QSqlRecord rec = query.record();
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const int keyColumn = rec.indexOf("id");
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const int dataColumn = rec.indexOf("data");
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while (query.next()) {
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h[query.value(keyColumn).toString()] = query.value(dataColumn).toString();
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}
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setResult(h);
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}
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} else if (operationName() == "delete") {
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QSqlQuery query(*m_rdb->database());
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if (params["key"].toString().isEmpty()) {
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query.prepare("delete from "+m_clientName+" where valueGroup=:valueGroup");
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query.bindValue(":valueGroup", valueGroup);
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} else {
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query.prepare("delete from "+m_clientName+" where valueGroup=:valueGroup and id=:key");
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query.bindValue(":valueGroup", valueGroup);
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query.bindValue(":key", params["key"].toString());
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}
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const bool success = query.exec();
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setResult(success);
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} else if (operationName() == "expire") {
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QSqlQuery query(*m_rdb->database());
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if (valueGroup.isEmpty()) {
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query.prepare("delete from "+m_clientName+" where accessTime < :date");
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QDateTime time(QDateTime::currentDateTime());
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time.addSecs(-params["age"].toUInt());
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query.bindValue(":date", time.toTime_t());
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} else {
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query.prepare("delete from "+m_clientName+" where valueGroup=:valueGroup and accessTime < :date");
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query.bindValue(":valueGroup", valueGroup);
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QDateTime time(QDateTime::currentDateTime());
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time.addSecs(-params["age"].toUInt());
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query.bindValue(":date", time.toTime_t());
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}
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const bool success = query.exec();
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setResult(success);
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} else {
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setError(true);
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}
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m_rdb->database()->commit();
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}
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Plasma::ServiceJob* Storage::createJob(const QString &operation, QMap<QString, QVariant> ¶meters)
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{
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return new StorageJob(m_clientName, operation, parameters, this);
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}
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//Storage implementation
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Storage::Storage(QObject* parent) : Plasma::Service(parent)
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{
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//search among parents for an applet or dataengine: if found call the table as its plugin name
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QObject *parentObject = this;
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QString clientName("data");
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while ((parentObject = parentObject->parent())) {
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Plasma::Applet *applet = qobject_cast<Plasma::Applet *>(parentObject);
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if (applet) {
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m_clientName = applet->pluginName();
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break;
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}
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Plasma::DataEngine *engine = qobject_cast<Plasma::DataEngine *>(parentObject);
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if (engine) {
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m_clientName = engine->pluginName();
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break;
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}
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Plasma::AbstractRunner *runner = qobject_cast<Plasma::AbstractRunner *>(parentObject);
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if (runner) {
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m_clientName = runner->id();
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break;
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}
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}
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m_clientName = m_clientName.replace('.', "_");
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m_clientName = m_clientName.replace('-', "_");
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setName("storage");
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}
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Storage::~Storage()
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{
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}
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#include "storage_p.moc"
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