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/*
* Copyright (C) 2016 Christian Mollekopf <mollekopf@kolabsys.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "entitystore.h"
using namespace Sink;
EntityStore::EntityStore(const QByteArray &resourceType, const QByteArray &resourceInstanceIdentifier, Sink::Storage::Transaction &transaction)
: mResourceType(resourceType), mResourceInstanceIdentifier(resourceInstanceIdentifier),
mTransaction(transaction)
{
}
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> EntityStore::getLatest(const Sink::Storage::NamedDatabase &db, const QByteArray &uid, DomainTypeAdaptorFactoryInterface &adaptorFactory, qint64 &retrievedRevision)
{
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> current;
db.findLatest(uid,
[¤t, &adaptorFactory, &retrievedRevision](const QByteArray &key, const QByteArray &data) -> bool {
Sink::EntityBuffer buffer(const_cast<const char *>(data.data()), data.size());
if (!buffer.isValid()) {
Warning() << "Read invalid buffer from disk";
} else {
Trace() << "Found value " << key;
current = adaptorFactory.createAdaptor(buffer.entity());
retrievedRevision = Sink::Storage::revisionFromKey(key);
}
return false;
},
[](const Sink::Storage::Error &error) { Warning() << "Failed to read current value from storage: " << error.message; });
return current;
}
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> EntityStore::get(const Sink::Storage::NamedDatabase &db, const QByteArray &key, DomainTypeAdaptorFactoryInterface &adaptorFactory, qint64 &retrievedRevision)
{
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> current;
db.scan(key,
[¤t, &adaptorFactory, &retrievedRevision](const QByteArray &key, const QByteArray &data) -> bool {
Sink::EntityBuffer buffer(const_cast<const char *>(data.data()), data.size());
if (!buffer.isValid()) {
Warning() << "Read invalid buffer from disk";
} else {
current = adaptorFactory.createAdaptor(buffer.entity());
retrievedRevision = Sink::Storage::revisionFromKey(key);
}
return false;
},
[](const Sink::Storage::Error &error) { Warning() << "Failed to read current value from storage: " << error.message; });
return current;
}
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> EntityStore::getPrevious(const Sink::Storage::NamedDatabase &db, const QByteArray &uid, qint64 revision, DomainTypeAdaptorFactoryInterface &adaptorFactory, qint64 &retrievedRevision)
{
QSharedPointer<Sink::ApplicationDomain::BufferAdaptor> current;
qint64 latestRevision = 0;
db.scan(uid,
[¤t, &latestRevision, revision](const QByteArray &key, const QByteArray &) -> bool {
auto foundRevision = Sink::Storage::revisionFromKey(key);
if (foundRevision < revision && foundRevision > latestRevision) {
latestRevision = foundRevision;
}
return true;
},
[](const Sink::Storage::Error &error) { Warning() << "Failed to read current value from storage: " << error.message; }, true);
return get(db, Sink::Storage::assembleKey(uid, latestRevision), adaptorFactory, retrievedRevision);
}
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