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some new shared classes, little reorganization, preparation to cache client info

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Blue 2022-08-22 23:29:43 +03:00
parent 2ae75a4b91
commit 037dabbe06
Signed by untrusted user: blue
GPG key ID: 9B203B252A63EE38
20 changed files with 297 additions and 32 deletions
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204
core/storage/storage.cpp
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@ -1,204 +0,0 @@
/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <QStandardPaths>
#include <QDir>
#include "storage.h"
#include <shared/clientinfo.h>
template class Core::Storage<Shared::ClientInfo>;
template <class T>
Core::Storage<T>::Storage(const QString& p_name):
name(p_name),
opened(false),
environment(),
base()
{
}
template <class T>
Core::Storage<T>::~Storage()
{
close();
}
template <class T>
void Core::Storage<T>::open()
{
if (!opened) {
mdb_env_create(&environment);
QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
path += "/" + name;
QDir cache(path);
if (!cache.exists()) {
bool res = cache.mkpath(path);
if (!res) {
throw Archive::Directory(path.toStdString());
}
}
mdb_env_set_maxdbs(environment, 1);
mdb_env_set_mapsize(environment, 10UL * 1024UL * 1024UL);
mdb_env_open(environment, path.toStdString().c_str(), 0, 0664);
MDB_txn *txn;
mdb_txn_begin(environment, NULL, 0, &txn);
mdb_dbi_open(txn, "base", MDB_CREATE, &base);
mdb_txn_commit(txn);
opened = true;
}
}
template <class T>
void Core::Storage<T>::close()
{
if (opened) {
mdb_dbi_close(environment, base);
mdb_env_close(environment);
opened = false;
}
}
template <class T>
void Core::Storage<T>::addRecord(const QString& key, const T& value)
{
if (!opened) {
throw Archive::Closed("addRecord", name.toStdString());
}
QByteArray ba;
QDataStream ds(&ba, QIODevice::WriteOnly);
const std::string& id = key.toStdString();
ds << value;
MDB_val lmdbKey, lmdbData;
lmdbKey.mv_size = id.size();
lmdbKey.mv_data = (char*)id.c_str();
lmdbData.mv_size = ba.size();
lmdbData.mv_data = (uint8_t*)ba.data();
MDB_txn *txn;
mdb_txn_begin(environment, NULL, 0, &txn);
int rc;
rc = mdb_put(txn, base, &lmdbKey, &lmdbData, MDB_NOOVERWRITE);
if (rc != 0) {
mdb_txn_abort(txn);
if (rc == MDB_KEYEXIST) {
throw Archive::Exist(name.toStdString(), id);
} else {
throw Archive::Unknown(name.toStdString(), mdb_strerror(rc));
}
} else {
mdb_txn_commit(txn);
}
}
template <class T>
void Core::Storage<T>::changeRecord(const QString& key, const T& value)
{
if (!opened) {
throw Archive::Closed("changeRecord", name.toStdString());
}
QByteArray ba;
QDataStream ds(&ba, QIODevice::WriteOnly);
const std::string& id = key.toStdString();
ds << value;
MDB_val lmdbKey, lmdbData;
lmdbKey.mv_size = id.size();
lmdbKey.mv_data = (char*)id.c_str();
lmdbData.mv_size = ba.size();
lmdbData.mv_data = (uint8_t*)ba.data();
MDB_txn *txn;
mdb_txn_begin(environment, NULL, 0, &txn);
int rc;
rc = mdb_put(txn, base, &lmdbKey, &lmdbData, 0);
if (rc != 0) {
mdb_txn_abort(txn);
if (rc) {
throw Archive::Unknown(name.toStdString(), mdb_strerror(rc));
}
} else {
mdb_txn_commit(txn);
}
}
template <class T>
T Core::Storage<T>::getRecord(const QString& key) const
{
if (!opened) {
throw Archive::Closed("addElement", name.toStdString());
}
const std::string& id = key.toStdString();
MDB_val lmdbKey, lmdbData;
lmdbKey.mv_size = id.size();
lmdbKey.mv_data = (char*)id.c_str();
MDB_txn *txn;
int rc;
mdb_txn_begin(environment, NULL, MDB_RDONLY, &txn);
rc = mdb_get(txn, base, &lmdbKey, &lmdbData);
if (rc) {
mdb_txn_abort(txn);
if (rc == MDB_NOTFOUND) {
throw Archive::NotFound(id, name.toStdString());
} else {
throw Archive::Unknown(name.toStdString(), mdb_strerror(rc));
}
} else {
QByteArray ba((char*)lmdbData.mv_data, lmdbData.mv_size);
QDataStream ds(&ba, QIODevice::ReadOnly);
T value;
ds >> value;
mdb_txn_abort(txn);
return value;
}
}
template <class T>
void Core::Storage<T>::removeRecord(const QString& key)
{
if (!opened) {
throw Archive::Closed("addElement", name.toStdString());
}
const std::string& id = key.toStdString();
MDB_val lmdbKey;
lmdbKey.mv_size = id.size();
lmdbKey.mv_data = (char*)id.c_str();
MDB_txn *txn;
int rc;
mdb_txn_begin(environment, NULL, 0, &txn);
rc = mdb_del(txn, base, &lmdbKey, NULL);
if (rc) {
mdb_txn_abort(txn);
if (rc == MDB_NOTFOUND) {
throw Archive::NotFound(id, name.toStdString());
} else {
throw Archive::Unknown(name.toStdString(), mdb_strerror(rc));
}
} else {
mdb_txn_commit(txn);
}
}