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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/s/query/store_possible_cursor.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/query/cursor_response.h"
#include "mongo/s/query/cluster_client_cursor_impl.h"
#include "mongo/s/query/cluster_client_cursor_params.h"
#include "mongo/s/query/cluster_cursor_manager.h"
namespace mongo {
StatusWith<BSONObj> storePossibleCursor(OperationContext* opCtx,
const HostAndPort& server,
const BSONObj& cmdResult,
const NamespaceString& requestedNss,
executor::TaskExecutor* executor,
ClusterCursorManager* cursorManager) {
if (!cmdResult["ok"].trueValue() || !cmdResult.hasField("cursor")) {
return cmdResult;
}
auto incomingCursorResponse = CursorResponse::parseFromBSON(cmdResult);
if (!incomingCursorResponse.isOK()) {
return incomingCursorResponse.getStatus();
}
if (incomingCursorResponse.getValue().getCursorId() == CursorId(0)) {
return cmdResult;
}
ClusterClientCursorParams params(incomingCursorResponse.getValue().getNSS());
params.remotes.emplace_back(server, incomingCursorResponse.getValue().getCursorId());
auto ccc = ClusterClientCursorImpl::make(opCtx, executor, std::move(params));
auto clusterCursorId =
cursorManager->registerCursor(opCtx,
ccc.releaseCursor(),
requestedNss,
ClusterCursorManager::CursorType::NamespaceNotSharded,
ClusterCursorManager::CursorLifetime::Mortal);
if (!clusterCursorId.isOK()) {
return clusterCursorId.getStatus();
}
CursorResponse outgoingCursorResponse(
requestedNss, clusterCursorId.getValue(), incomingCursorResponse.getValue().getBatch());
return outgoingCursorResponse.toBSON(CursorResponse::ResponseType::InitialResponse);
}
} // namespace mongo
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