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/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
* Copyright (C) 2014 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 "storage.h"
#include "log.h"
#include <QUuid>
QDebug& operator<<(QDebug &dbg, const Sink::Storage::DataStore::Error &error)
{
dbg << error.message << "Code: " << error.code << "Db: " << error.store;
return dbg;
}
namespace Sink {
namespace Storage {
static const char *s_internalPrefix = "__internal";
static const int s_internalPrefixSize = strlen(s_internalPrefix);
void errorHandler(const DataStore::Error &error)
{
if (error.code == DataStore::TransactionError) {
SinkError() << "Database error in " << error.store << ", code " << error.code << ", message: " << error.message;
} else {
SinkWarning() << "Database error in " << error.store << ", code " << error.code << ", message: " << error.message;
}
}
std::function<void(const DataStore::Error &error)> DataStore::basicErrorHandler()
{
return errorHandler;
}
void DataStore::setDefaultErrorHandler(const std::function<void(const DataStore::Error &error)> &errorHandler)
{
mErrorHandler = errorHandler;
}
std::function<void(const DataStore::Error &error)> DataStore::defaultErrorHandler() const
{
if (mErrorHandler) {
return mErrorHandler;
}
return basicErrorHandler();
}
void DataStore::setMaxRevision(DataStore::Transaction &transaction, qint64 revision)
{
transaction.openDatabase().write("__internal_maxRevision", QByteArray::number(revision));
}
qint64 DataStore::maxRevision(const DataStore::Transaction &transaction)
{
qint64 r = 0;
transaction.openDatabase().scan("__internal_maxRevision",
[&](const QByteArray &, const QByteArray &revision) -> bool {
r = revision.toLongLong();
return false;
},
[](const Error &error) {
if (error.code != DataStore::NotFound) {
SinkWarning() << "Couldn't find the maximum revision: " << error;
}
});
return r;
}
void DataStore::setCleanedUpRevision(DataStore::Transaction &transaction, qint64 revision)
{
transaction.openDatabase().write("__internal_cleanedUpRevision", QByteArray::number(revision));
}
qint64 DataStore::cleanedUpRevision(const DataStore::Transaction &transaction)
{
qint64 r = 0;
transaction.openDatabase().scan("__internal_cleanedUpRevision",
[&](const QByteArray &, const QByteArray &revision) -> bool {
r = revision.toLongLong();
return false;
},
[](const Error &error) {
if (error.code != DataStore::NotFound) {
SinkWarning() << "Couldn't find the cleanedUpRevision: " << error;
}
});
return r;
}
QByteArray DataStore::getUidFromRevision(const DataStore::Transaction &transaction, qint64 revision)
{
QByteArray uid;
transaction.openDatabase("revisions")
.scan(QByteArray::number(revision),
[&](const QByteArray &, const QByteArray &value) -> bool {
uid = QByteArray{value.constData(), value.size()};
return false;
},
[revision](const Error &error) { SinkWarning() << "Couldn't find uid for revision: " << revision << error.message; });
return uid;
}
QByteArray DataStore::getTypeFromRevision(const DataStore::Transaction &transaction, qint64 revision)
{
QByteArray type;
transaction.openDatabase("revisionType")
.scan(QByteArray::number(revision),
[&](const QByteArray &, const QByteArray &value) -> bool {
type = QByteArray{value.constData(), value.size()};
return false;
},
[revision](const Error &error) { SinkWarning() << "Couldn't find type for revision " << revision; });
return type;
}
void DataStore::recordRevision(DataStore::Transaction &transaction, qint64 revision, const QByteArray &uid, const QByteArray &type)
{
// TODO use integerkeys
transaction.openDatabase("revisions").write(QByteArray::number(revision), uid);
transaction.openDatabase("revisionType").write(QByteArray::number(revision), type);
}
void DataStore::removeRevision(DataStore::Transaction &transaction, qint64 revision)
{
transaction.openDatabase("revisions").remove(QByteArray::number(revision));
transaction.openDatabase("revisionType").remove(QByteArray::number(revision));
}
void DataStore::recordUid(DataStore::Transaction &transaction, const QByteArray &uid)
{
transaction.openDatabase("uids").write(uid, "");
}
void DataStore::removeUid(DataStore::Transaction &transaction, const QByteArray &uid)
{
transaction.openDatabase("uids").remove(uid);
}
void DataStore::getUids(const Transaction &transaction, const std::function<void(const QByteArray &uid)> &callback)
{
transaction.openDatabase("uids").scan("", [&] (const QByteArray &key, const QByteArray &) {
callback(key);
return true;
});
}
bool DataStore::isInternalKey(const char *key)
{
return key && strncmp(key, s_internalPrefix, s_internalPrefixSize) == 0;
}
bool DataStore::isInternalKey(void *key, int size)
{
if (size < 1) {
return false;
}
return key && strncmp(static_cast<char *>(key), s_internalPrefix, (size > s_internalPrefixSize ? s_internalPrefixSize : size)) == 0;
}
bool DataStore::isInternalKey(const QByteArray &key)
{
return key.startsWith(s_internalPrefix);
}
QByteArray DataStore::assembleKey(const QByteArray &key, qint64 revision)
{
Q_ASSERT(revision <= 9223372036854775807);
Q_ASSERT(key.size() == 38);
return key + QByteArray::number(revision).rightJustified(19, '0', false);
}
QByteArray DataStore::uidFromKey(const QByteArray &key)
{
return key.mid(0, 38);
}
qint64 DataStore::revisionFromKey(const QByteArray &key)
{
return key.mid(39).toLongLong();
}
QByteArray DataStore::generateUid()
{
return QUuid::createUuid().toByteArray();
}
DataStore::NamedDatabase DataStore::mainDatabase(const DataStore::Transaction &t, const QByteArray &type)
{
if (type.isEmpty()) {
SinkError() << "Tried to open main database for empty type.";
Q_ASSERT(false);
return {};
}
return t.openDatabase(type + ".main");
}
bool DataStore::NamedDatabase::contains(const QByteArray &uid)
{
bool found = false;
scan(uid,
[&found](const QByteArray &, const QByteArray &) -> bool {
found = true;
return false;
},
[this](const DataStore::Error &error) {}, true);
return found;
}
}
} // namespace Sink
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