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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/db/pipeline/document_source_index_stats.h"
#include "mongo/db/pipeline/lite_parsed_document_source.h"
#include "mongo/db/server_options.h"
#include "mongo/util/net/sock.h"
namespace mongo {
using boost::intrusive_ptr;
REGISTER_DOCUMENT_SOURCE(indexStats,
DocumentSourceIndexStats::LiteParsed::parse,
DocumentSourceIndexStats::createFromBson);
const char* DocumentSourceIndexStats::getSourceName() const {
return "$indexStats";
}
DocumentSource::GetNextResult DocumentSourceIndexStats::getNext() {
pExpCtx->checkForInterrupt();
if (_indexStatsMap.empty()) {
_indexStatsMap = _mongod->getIndexStats(pExpCtx->opCtx, pExpCtx->ns);
_indexStatsIter = _indexStatsMap.begin();
}
if (_indexStatsIter != _indexStatsMap.end()) {
const auto& stats = _indexStatsIter->second;
MutableDocument doc;
doc["name"] = Value(_indexStatsIter->first);
doc["key"] = Value(stats.indexKey);
doc["host"] = Value(_processName);
doc["accesses"]["ops"] = Value(stats.accesses.loadRelaxed());
doc["accesses"]["since"] = Value(stats.trackerStartTime);
++_indexStatsIter;
return doc.freeze();
}
return GetNextResult::makeEOF();
}
DocumentSourceIndexStats::DocumentSourceIndexStats(const intrusive_ptr<ExpressionContext>& pExpCtx)
: DocumentSourceNeedsMongod(pExpCtx), _processName(getHostNameCachedAndPort()) {}
intrusive_ptr<DocumentSource> DocumentSourceIndexStats::createFromBson(
BSONElement elem, const intrusive_ptr<ExpressionContext>& pExpCtx) {
uassert(28803,
"The $indexStats stage specification must be an empty object",
elem.type() == Object && elem.Obj().isEmpty());
return new DocumentSourceIndexStats(pExpCtx);
}
Value DocumentSourceIndexStats::serialize(
boost::optional<ExplainOptions::Verbosity> explain) const {
return Value(DOC(getSourceName() << Document()));
}
}
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