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Blue 2023-03-21 14:05:54 +03:00
parent 19229f6c26
commit 7377f13534
Signed by: blue
GPG key ID: 9B203B252A63EE38
29 changed files with 316 additions and 310 deletions
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// 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 "base.h"
#include "exceptions.h"
#include "storage.h"
LMDBAL::Base::Base(const QString& p_name, uint16_t mapSize):
name(p_name.toStdString()),
opened(false),
size(mapSize),
environment(),
tables(),
transactions(new Transactions())
{}
LMDBAL::Base::~Base() {
close();
delete transactions;
for (const std::pair<const std::string, iStorage*>& pair : tables)
delete pair.second;
}
void LMDBAL::Base::close() {
if (opened) {
for (const std::pair<const std::string, iStorage*>& pair : tables) {
iStorage* table = pair.second;
mdb_dbi_close(environment, table->dbi);
}
mdb_env_close(environment);
opened = false;
}
}
void LMDBAL::Base::open() {
if (!opened) {
mdb_env_create(&environment);
QString path = createDirectory();
mdb_env_set_maxdbs(environment, tables.size());
mdb_env_set_mapsize(environment, size * 1024UL * 1024UL);
mdb_env_open(environment, path.toStdString().c_str(), 0, 0664);
MDB_txn *txn;
mdb_txn_begin(environment, NULL, 0, &txn);
for (const std::pair<const std::string, iStorage*>& pair : tables) {
iStorage* table = pair.second;
int rc = table->createTable(txn);
if (rc)
throw Unknown(name, mdb_strerror(rc));
}
mdb_txn_commit(txn);
opened = true;
}
}
bool LMDBAL::Base::removeDirectory() {
if (opened)
throw Opened(name, "remove database directory");
QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
path += "/" + getName();
QDir cache(path);
if (cache.exists())
return cache.removeRecursively();
else
return true;
}
QString LMDBAL::Base::createDirectory() {
if (opened)
throw Opened(name, "create database directory");
QString path(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
path += "/" + getName();
QDir cache(path);
if (!cache.exists()) {
bool res = cache.mkpath(path);
if (!res)
throw Directory(path.toStdString());
}
return path;
}
QString LMDBAL::Base::getName() const {
return QString::fromStdString(name);}
bool LMDBAL::Base::ready() const {
return opened;}
void LMDBAL::Base::drop() {
if (!opened)
throw Closed("drop", name);
MDB_txn *txn;
int rc = mdb_txn_begin(environment, NULL, 0, &txn);
if (rc)
throw Unknown(name, mdb_strerror(rc));
for (const std::pair<const std::string, iStorage*>& pair : tables) {
rc = pair.second->drop(txn);
if (rc)
throw Unknown(name, mdb_strerror(rc), pair.first);
}
mdb_txn_commit(txn);
}
LMDBAL::TransactionID LMDBAL::Base::beginReadOnlyTransaction() const {
return beginReadOnlyTransaction(emptyName);}
LMDBAL::TransactionID LMDBAL::Base::beginTransaction() const {
return beginTransaction(emptyName);}
void LMDBAL::Base::abortTransaction(LMDBAL::TransactionID id) const {
return abortTransaction(id, emptyName);}
void LMDBAL::Base::commitTransaction(LMDBAL::TransactionID id) const {
return commitTransaction(id, emptyName);}
LMDBAL::TransactionID LMDBAL::Base::beginReadOnlyTransaction(const std::string& storageName) const {
if (!opened)
throw Closed("beginReadOnlyTransaction", name, storageName);
MDB_txn* txn;
int rc = mdb_txn_begin(environment, NULL, MDB_RDONLY, &txn);
if (rc) {
mdb_txn_abort(txn);
throw Unknown(name, mdb_strerror(rc), storageName);
}
transactions->emplace(txn);
return txn;
}
LMDBAL::TransactionID LMDBAL::Base::beginTransaction(const std::string& storageName) const {
if (!opened)
throw Closed("beginTransaction", name, storageName);
MDB_txn* txn;
int rc = mdb_txn_begin(environment, NULL, 0, &txn);
if (rc) {
mdb_txn_abort(txn);
throw Unknown(name, mdb_strerror(rc), storageName);
}
transactions->emplace(txn);
return txn;
}
void LMDBAL::Base::abortTransaction(LMDBAL::TransactionID id, const std::string& storageName) const {
if (!opened)
throw Closed("abortTransaction", name, storageName);
Transactions::iterator itr = transactions->find(id);
if (itr == transactions->end()) //TODO may be it's a good idea to make an exception class for this
throw Unknown(name, "unable to abort transaction: transaction was not found", storageName);
mdb_txn_abort(id);
transactions->erase(itr);
}
void LMDBAL::Base::commitTransaction(LMDBAL::TransactionID id, const std::string& storageName) const {
if (!opened)
throw Closed("abortTransaction", name, storageName);
Transactions::iterator itr = transactions->find(id);
if (itr == transactions->end()) //TODO may be it's a good idea to make an exception class for this
throw Unknown(name, "unable to commit transaction: transaction was not found", storageName);
int rc = mdb_txn_commit(id);
transactions->erase(itr);
if (rc != MDB_SUCCESS)
throw Unknown(name, mdb_strerror(rc), storageName);
}