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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/rpc/metadata.h"
#include "mongo/client/dbclientinterface.h"
#include "mongo/db/jsobj.h"
namespace mongo {
namespace rpc {
namespace metadata {
BSONObj empty() {
return BSONObj();
}
const char kSecondaryOk[] = "$secondaryOk";
StatusWith<CommandAndMetadata> upconvertRequest(BSONObj legacyCmdObj, int queryFlags) {
BSONObjBuilder metadataBob;
// note second check may be erroneous: see SERVER-18194
if ((queryFlags & QueryOption_SlaveOk)) {
metadataBob.append(kSecondaryOk, 1);
}
return std::make_tuple(std::move(legacyCmdObj), std::move(metadataBob.obj()));
}
StatusWith<LegacyCommandAndFlags> downconvertRequest(BSONObj cmdObj, BSONObj metadata) {
int flags = 0;
if (metadata.hasField(kSecondaryOk)) {
flags |= QueryOption_SlaveOk;
}
return std::make_tuple(std::move(cmdObj), flags);
}
} // namespace metadata
} // namespace rpc
} // namespace mongo
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