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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/base/status_with.h"
#include "mongo/s/catalog/sharding_catalog_client.h"
#include "mongo/s/catalog/type_database.h"
#include "mongo/s/config.h"
#include "mongo/s/grid.h"
namespace mongo {
using std::shared_ptr;
using std::string;
CatalogCache::CatalogCache() = default;
CatalogCache::~CatalogCache() = default;
StatusWith<std::shared_ptr<DBConfig>> CatalogCache::getDatabase(OperationContext* opCtx,
StringData dbName) {
stdx::lock_guard<stdx::mutex> guard(_mutex);
auto it = _databases.find(dbName);
if (it != _databases.end()) {
return it->second;
}
// Need to load from the store
auto status = Grid::get(opCtx)->catalogClient(opCtx)->getDatabase(opCtx, dbName.toString());
if (!status.isOK()) {
return status.getStatus();
}
const auto& dbOpTimePair = status.getValue();
auto db = std::make_shared<DBConfig>(dbOpTimePair.value, dbOpTimePair.opTime);
try {
db->load(opCtx);
auto emplaceResult = _databases.try_emplace(dbName, std::move(db));
return emplaceResult.first->second;
} catch (const DBException& ex) {
return ex.toStatus();
}
}
void CatalogCache::invalidate(StringData dbName) {
stdx::lock_guard<stdx::mutex> guard(_mutex);
ShardedDatabasesMap::iterator it = _databases.find(dbName);
if (it != _databases.end()) {
_databases.erase(it);
}
}
void CatalogCache::invalidateAll() {
stdx::lock_guard<stdx::mutex> guard(_mutex);
_databases.clear();
}
} // namespace mongo
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