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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/db/s/operation_sharding_state.h"
#include "mongo/db/s/sharded_connection_info.h"
#include "mongo/db/server_options.h"
#include "mongo/util/log.h"
namespace mongo {
namespace {
const auto getShardingState = ServiceContext::declareDecoration<ShardingState>();
} // namespace
ShardingState::ShardingState() = default;
ShardingState::~ShardingState() = default;
ShardingState* ShardingState::get(ServiceContext* serviceContext) {
return &getShardingState(serviceContext);
}
ShardingState* ShardingState::get(OperationContext* operationContext) {
return ShardingState::get(operationContext->getServiceContext());
}
void ShardingState::setInitialized(ShardId shardId, OID clusterId) {
stdx::unique_lock<stdx::mutex> ul(_mutex);
invariant(_getInitializationState() == InitializationState::kNew);
_shardId = std::move(shardId);
_clusterId = std::move(clusterId);
_initializationStatus = Status::OK();
_initializationState.store(static_cast<uint32_t>(InitializationState::kInitialized));
}
void ShardingState::setInitialized(Status failedStatus) {
invariant(!failedStatus.isOK());
log() << "Failed to initialize sharding components" << causedBy(failedStatus);
stdx::unique_lock<stdx::mutex> ul(_mutex);
invariant(_getInitializationState() == InitializationState::kNew);
_initializationStatus = std::move(failedStatus);
_initializationState.store(static_cast<uint32_t>(InitializationState::kError));
}
boost::optional<Status> ShardingState::initializationStatus() {
stdx::unique_lock<stdx::mutex> ul(_mutex);
if (_getInitializationState() == InitializationState::kNew)
return boost::none;
return _initializationStatus;
}
bool ShardingState::enabled() const {
return _getInitializationState() == InitializationState::kInitialized;
}
Status ShardingState::canAcceptShardedCommands() const {
if (serverGlobalParams.clusterRole != ClusterRole::ShardServer) {
return {ErrorCodes::NoShardingEnabled,
"Cannot accept sharding commands if not started with --shardsvr"};
} else if (!enabled()) {
return {ErrorCodes::ShardingStateNotInitialized,
"Cannot accept sharding commands if sharding state has not "
"been initialized with a shardIdentity document"};
} else {
return Status::OK();
}
}
ShardId ShardingState::shardId() {
invariant(enabled());
stdx::lock_guard<stdx::mutex> lk(_mutex);
return _shardId;
}
OID ShardingState::clusterId() {
invariant(enabled());
stdx::lock_guard<stdx::mutex> lk(_mutex);
return _clusterId;
}
bool ShardingState::needCollectionMetadata(OperationContext* opCtx, const std::string& ns) {
if (!enabled())
return false;
Client* client = opCtx->getClient();
// Shard version information received from mongos may either by attached to the Client or
// directly to the OperationContext.
return ShardedConnectionInfo::get(client, false) ||
OperationShardingState::get(opCtx).hasShardVersion();
}
void ShardingState::clearForTests() {
_initializationState.store(static_cast<uint32_t>(InitializationState::kNew));
}
} // namespace mongo
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