100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
// Squawk messenger.
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// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program 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
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "database.h"
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#include "exceptions.h"
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#include "table.h"
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Core::DataBase::DataBase(const QString& p_name, uint16_t mapSize):
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name(p_name.toStdString()),
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opened(false),
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size(mapSize),
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environment(),
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tables()
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{
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}
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Core::DataBase::~DataBase()
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{
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close();
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for (const std::pair<const std::string, _Table*>& pair : tables) {
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delete pair.second;
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}
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}
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void Core::DataBase::close()
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{
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if (opened) {
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for (const std::pair<const std::string, _Table*>& pair : tables) {
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_Table* table = pair.second;
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mdb_dbi_close(environment, table->dbi);
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}
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mdb_env_close(environment);
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opened = false;
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}
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}
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void Core::DataBase::open()
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{
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if (!opened) {
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mdb_env_create(&environment);
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QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
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path += "/" + getName();
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QDir cache(path);
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if (!cache.exists()) {
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bool res = cache.mkpath(path);
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if (!res) {
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throw Directory(path.toStdString());
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}
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}
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mdb_env_set_maxdbs(environment, tables.size());
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mdb_env_set_mapsize(environment, size * 1024UL * 1024UL);
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mdb_env_open(environment, path.toStdString().c_str(), 0, 0664);
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MDB_txn *txn;
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mdb_txn_begin(environment, NULL, 0, &txn);
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for (const std::pair<const std::string, _Table*>& pair : tables) {
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_Table* table = pair.second;
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int rc = mdb_dbi_open(txn, pair.first.c_str(), MDB_CREATE, &table->dbi);
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if (rc) {
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throw Unknown(name, mdb_strerror(rc));
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}
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}
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mdb_txn_commit(txn);
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opened = true;
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}
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}
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QString Core::DataBase::getName() const
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{
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return QString::fromStdString(name);
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}
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template <class K, class V>
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Core::DataBase::Table<K, V>* Core::DataBase::addTable(const QString& p_name) {
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std::string nm = p_name.toStdString();
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if (opened) {
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throw Core::DataBase::Opened(name, nm);
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}
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Core::DataBase::Table<K, V>* table = new Core::DataBase::Table<K, V>(nm, this);
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tables.insert(std::make_pair(nm, table));
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return table;
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}
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