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/**
* Copyright (C) 2017 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.
*/
#pragma once
#include "mongo/bson/bsonelement.h"
#include "mongo/db/pipeline/document_source_list_local_sessions.h"
#include "mongo/db/pipeline/document_source_match.h"
#include "mongo/db/pipeline/lite_parsed_document_source.h"
namespace mongo {
/**
* $listSessions: { allUsers: true/false, users: [ {user:"jsmith", db:"test"}, ... ] }
* Return all sessions in the config.system.sessions collection
* or just sessions for the currently logged in user. (Default: false)
*
* This is essentially an alias for {$match:{"_id.uid": myid}} or {$match:{}}
* with appropriate constraints on stage positioning and security checks
* based on ActionType::ListSessions
*/
class DocumentSourceListSessions final : public DocumentSourceMatch {
public:
static const char* kStageName;
class LiteParsed final : public LiteParsedDocumentSource {
public:
static std::unique_ptr<LiteParsed> parse(const AggregationRequest& request,
const BSONElement& spec) {
return stdx::make_unique<LiteParsed>(listSessionsParseSpec(kStageName, spec));
}
explicit LiteParsed(const ListSessionsSpec& spec) : _spec(spec) {}
stdx::unordered_set<NamespaceString> getInvolvedNamespaces() const final {
return stdx::unordered_set<NamespaceString>();
}
PrivilegeVector requiredPrivileges(bool isMongos) const final {
return listSessionsRequiredPrivileges(_spec);
}
bool isInitialSource() const final {
return true;
}
bool allowedToPassthroughFromMongos() const final {
return _spec.getAllUsers();
}
private:
const ListSessionsSpec _spec;
};
const char* getSourceName() const final {
return kStageName;
}
Value serialize(boost::optional<ExplainOptions::Verbosity> explain = boost::none) const final {
return Value(Document{{getSourceName(), _spec.toBSON()}});
}
StageConstraints constraints(Pipeline::SplitState pipeState) const final {
return {StreamType::kStreaming,
PositionRequirement::kFirst,
HostTypeRequirement::kNone,
DiskUseRequirement::kNoDiskUse,
FacetRequirement::kNotAllowed,
TransactionRequirement::kNotAllowed};
}
static boost::intrusive_ptr<DocumentSource> createFromBson(
BSONElement elem, const boost::intrusive_ptr<ExpressionContext>& pExpCtx);
private:
DocumentSourceListSessions(const BSONObj& query,
const boost::intrusive_ptr<ExpressionContext>& pExpCtx,
const ListSessionsSpec& spec)
: DocumentSourceMatch(query, pExpCtx), _spec(spec) {}
const ListSessionsSpec _spec;
};
} // namespace mongo
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