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/**
* Copyright (C) 2010-2015 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/s/grid.h"
#include "mongo/base/status_with.h"
#include "mongo/s/catalog/catalog_cache.h"
#include "mongo/s/catalog/catalog_manager.h"
#include "mongo/s/catalog/type_settings.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/util/log.h"
namespace mongo {
Grid::Grid() : _allowLocalShard(true) {}
void Grid::init(std::unique_ptr<CatalogManager> catalogManager,
std::unique_ptr<ShardRegistry> shardRegistry) {
invariant(!_catalogManager);
invariant(!_catalogCache);
invariant(!_shardRegistry);
_catalogManager = std::move(catalogManager);
_catalogCache = stdx::make_unique<CatalogCache>(_catalogManager.get());
_shardRegistry = std::move(shardRegistry);
}
StatusWith<std::shared_ptr<DBConfig>> Grid::implicitCreateDb(const std::string& dbName) {
auto status = catalogCache()->getDatabase(dbName);
if (status.isOK()) {
return status;
}
if (status == ErrorCodes::DatabaseNotFound) {
auto statusCreateDb = catalogManager()->createDatabase(dbName);
if (statusCreateDb.isOK() || statusCreateDb == ErrorCodes::NamespaceExists) {
return catalogCache()->getDatabase(dbName);
}
return statusCreateDb;
}
return status;
}
bool Grid::allowLocalHost() const {
return _allowLocalShard;
}
void Grid::setAllowLocalHost(bool allow) {
_allowLocalShard = allow;
}
/*
* Returns whether balancing is enabled, with optional namespace "ns" parameter for balancing on a particular
* collection.
*/
bool Grid::shouldBalance(const SettingsType& balancerSettings) const {
if (balancerSettings.isBalancerStoppedSet() && balancerSettings.getBalancerStopped()) {
return false;
}
if (balancerSettings.isBalancerActiveWindowSet()) {
boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
return balancerSettings.inBalancingWindow(now);
}
return true;
}
bool Grid::getConfigShouldBalance() const {
auto balSettingsResult = grid.catalogManager()->getGlobalSettings(SettingsType::BalancerDocKey);
if (!balSettingsResult.isOK()) {
warning() << balSettingsResult.getStatus();
return false;
}
SettingsType balSettings = balSettingsResult.getValue();
if (!balSettings.isKeySet()) {
// Balancer settings doc does not exist. Default to yes.
return true;
}
return shouldBalance(balSettings);
}
void Grid::clearForUnitTests() {
_catalogManager.reset();
_catalogCache.reset();
_shardRegistry.reset();
}
Grid grid;
}
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