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/**
* Copyright (C) 2016 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/rpc/metadata/client_metadata_ismaster.h"
#include <string>
#include "mongo/base/init.h"
#include "mongo/base/status.h"
#include "mongo/db/client.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/stdx/memory.h"
namespace mongo {
namespace {
const auto getClientMetadataIsMasterState =
Client::declareDecoration<ClientMetadataIsMasterState>();
} // namespace
ClientMetadataIsMasterState& ClientMetadataIsMasterState::get(Client* client) {
return getClientMetadataIsMasterState(*client);
}
bool ClientMetadataIsMasterState::hasSeenIsMaster() const {
return _hasSeenIsMaster;
}
void ClientMetadataIsMasterState::setSeenIsMaster() {
invariant(!_hasSeenIsMaster);
_hasSeenIsMaster = true;
}
const boost::optional<ClientMetadata>& ClientMetadataIsMasterState::getClientMetadata() const {
return _clientMetadata;
}
void ClientMetadataIsMasterState::setClientMetadata(Client* client,
boost::optional<ClientMetadata> clientMetadata,
bool setViaMetadata) {
auto& state = get(client);
stdx::lock_guard<Client> lk(*client);
state._clientMetadata = std::move(clientMetadata);
state._setViaMetadata = setViaMetadata;
}
Status ClientMetadataIsMasterState::readFromMetadata(OperationContext* opCtx,
BSONElement& element) {
auto& clientMetadataIsMasterState = ClientMetadataIsMasterState::get(opCtx->getClient());
// If client metadata is not present in network requests, reset the in-memory metadata to be
// blank so that the wrong
// app name is not propagated.
if (element.eoo()) {
auto client = opCtx->getClient();
if (clientMetadataIsMasterState._setViaMetadata && !client->isInDirectClient()) {
clientMetadataIsMasterState.setClientMetadata(client, boost::none, true);
}
return Status::OK();
}
auto swParseClientMetadata = ClientMetadata::parse(element);
if (!swParseClientMetadata.getStatus().isOK()) {
return swParseClientMetadata.getStatus();
}
clientMetadataIsMasterState.setClientMetadata(
opCtx->getClient(), std::move(swParseClientMetadata.getValue()), true);
return Status::OK();
}
void ClientMetadataIsMasterState::writeToMetadata(OperationContext* opCtx,
BSONObjBuilder* builder) {
// We may be asked to write metadata on background threads that are not associated with an
// operation context
if (!opCtx) {
return;
}
const auto& clientMetadata =
ClientMetadataIsMasterState::get(opCtx->getClient()).getClientMetadata();
// Skip appending metadata if there is none
if (!clientMetadata || clientMetadata.get().getDocument().isEmpty()) {
return;
}
builder->append(ClientMetadata::fieldName(), clientMetadata.get().getDocument());
}
} // namespace mongo
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