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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 <cstdint>
#include <memory>
namespace mongo {
class Message;
template <typename T>
class StatusWith;
class StringData;
class NamespaceString;
namespace executor {
struct RemoteCommandRequest;
struct RemoteCommandResponse;
/**
* Downconverts a find command request to the legacy (non-command) OP_QUERY format. The returned
* message is formed, with the exception of the messageId header field, which must be set by
* the caller before sending the message over the wire. Note that our legacy socket code sets the
* messageId in MessagingPort::say().
*/
StatusWith<Message> downconvertFindCommandRequest(const RemoteCommandRequest& request);
/**
* Upconverts the OP_REPLY received in response to a legacy OP_QUERY to a semantically equivalent
* find command response. The 'requestId' parameter is the messageId of the original OP_QUERY, and
* the 'cursorNamespace' is the full namespace of the collection the query ran on.
*/
StatusWith<RemoteCommandResponse> upconvertLegacyQueryResponse(std::uint32_t requestId,
StringData cursorNamespace,
const Message& response);
/**
* Downconverts a getMore command request to the legacy OP_GET_MORE format. The returned message
* is fully formed, with the exception of the messageId header field, which must be set by the
* the caller before sending the message over the wire. Note that our legacy socket code sets the
* messageId in MessagingPort::say().
*/
StatusWith<Message> downconvertGetMoreCommandRequest(const RemoteCommandRequest& request);
/**
* Upconverts the OP_REPLY received in response to a legacy OP_GET_MORE to a semantically equivalent
* getMore command response. The 'requestId' parameter is the messageId of the original OP_GET_MORE,
* and the 'curesorNamespace' is the full namespace of the collection the original query ran on.
*/
StatusWith<RemoteCommandResponse> upconvertLegacyGetMoreResponse(std::uint32_t requestId,
StringData cursorNamespace,
const Message& response);
} // namespace mongo
} // namespace executor
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