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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/base/disallow_copying.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/cursor_manager.h"
#include "mongo/db/commands/killcursors_common.h"
#include "mongo/db/curop.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/query/killcursors_request.h"
namespace mongo {
class KillCursorsCmd final : public KillCursorsCmdBase {
MONGO_DISALLOW_COPYING(KillCursorsCmd);
public:
KillCursorsCmd() = default;
private:
Status _killCursor(OperationContext* opCtx,
const NamespaceString& nss,
CursorId cursorId) final {
std::unique_ptr<AutoGetCollectionOrViewForRead> ctx;
CursorManager* cursorManager;
if (nss.isListIndexesCursorNS() || nss.isListCollectionsCursorNS()) {
// listCollections and listIndexes are special cursor-generating commands whose cursors
// are managed globally, as they operate over catalog data rather than targeting the
// data within a collection.
cursorManager = CursorManager::getGlobalCursorManager();
} else {
ctx = stdx::make_unique<AutoGetCollectionOrViewForRead>(opCtx, nss);
Collection* collection = ctx->getCollection();
ViewDefinition* view = ctx->getView();
if (view) {
Database* db = ctx->getDb();
auto resolved = db->getViewCatalog()->resolveView(opCtx, nss);
if (!resolved.isOK()) {
return resolved.getStatus();
}
ctx->releaseLocksForView();
Status status = _killCursor(opCtx, resolved.getValue().getNamespace(), cursorId);
{
// Set the namespace of the curop back to the view namespace so ctx records
// stats on this view namespace on destruction.
stdx::lock_guard<Client> lk(*opCtx->getClient());
CurOp::get(opCtx)->setNS_inlock(nss.ns());
}
return status;
}
if (!collection) {
return {ErrorCodes::CursorNotFound,
str::stream() << "collection does not exist: " << nss.ns()};
}
cursorManager = collection->getCursorManager();
}
invariant(cursorManager);
return cursorManager->eraseCursor(opCtx, cursorId, true /*shouldAudit*/);
}
} killCursorsCmd;
} // namespace mongo
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