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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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_coll_stats.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/pipeline/lite_parsed_document_source.h"
#include "mongo/db/stats/top.h"
#include "mongo/util/net/socket_utils.h"
#include "mongo/util/time_support.h"
using boost::intrusive_ptr;
namespace mongo {
REGISTER_DOCUMENT_SOURCE(collStats,
DocumentSourceCollStats::LiteParsed::parse,
DocumentSourceCollStats::createFromBson);
const char* DocumentSourceCollStats::getSourceName() const {
return "$collStats";
}
intrusive_ptr<DocumentSource> DocumentSourceCollStats::createFromBson(
BSONElement specElem, const intrusive_ptr<ExpressionContext>& pExpCtx) {
uassert(40166,
str::stream() << "$collStats must take a nested object but found: " << specElem,
specElem.type() == BSONType::Object);
intrusive_ptr<DocumentSourceCollStats> collStats(new DocumentSourceCollStats(pExpCtx));
for (const auto& elem : specElem.embeddedObject()) {
StringData fieldName = elem.fieldNameStringData();
if ("latencyStats" == fieldName) {
uassert(40167,
str::stream() << "latencyStats argument must be an object, but got " << elem
<< " of type "
<< typeName(elem.type()),
elem.type() == BSONType::Object);
if (!elem["histograms"].eoo()) {
uassert(40305,
str::stream() << "histograms option to latencyStats must be bool, got "
<< elem
<< "of type "
<< typeName(elem.type()),
elem["histograms"].isBoolean());
}
} else if ("storageStats" == fieldName) {
uassert(40279,
str::stream() << "storageStats argument must be an object, but got " << elem
<< " of type "
<< typeName(elem.type()),
elem.type() == BSONType::Object);
} else if ("count" == fieldName) {
uassert(40480,
str::stream() << "count argument must be an object, but got " << elem
<< " of type "
<< typeName(elem.type()),
elem.type() == BSONType::Object);
} else {
uasserted(40168, str::stream() << "unrecognized option to $collStats: " << fieldName);
}
}
collStats->_collStatsSpec = specElem.Obj().getOwned();
return collStats;
}
DocumentSource::GetNextResult DocumentSourceCollStats::getNext() {
pExpCtx->checkForInterrupt();
if (_finished) {
return GetNextResult::makeEOF();
}
_finished = true;
BSONObjBuilder builder;
builder.append("ns", pExpCtx->ns.ns());
auto shardName = pExpCtx->mongoProcessInterface->getShardName(pExpCtx->opCtx);
if (!shardName.empty()) {
builder.append("shard", shardName);
}
builder.append("host", getHostNameCachedAndPort());
builder.appendDate("localTime", jsTime());
if (_collStatsSpec.hasField("latencyStats")) {
// If the latencyStats field exists, it must have been validated as an object when parsing.
bool includeHistograms = false;
if (_collStatsSpec["latencyStats"].type() == BSONType::Object) {
includeHistograms = _collStatsSpec["latencyStats"]["histograms"].boolean();
}
pExpCtx->mongoProcessInterface->appendLatencyStats(
pExpCtx->opCtx, pExpCtx->ns, includeHistograms, &builder);
}
if (_collStatsSpec.hasField("storageStats")) {
// If the storageStats field exists, it must have been validated as an object when parsing.
BSONObjBuilder storageBuilder(builder.subobjStart("storageStats"));
Status status = pExpCtx->mongoProcessInterface->appendStorageStats(
pExpCtx->opCtx, pExpCtx->ns, _collStatsSpec["storageStats"].Obj(), &storageBuilder);
storageBuilder.doneFast();
if (!status.isOK()) {
uasserted(40280,
str::stream() << "Unable to retrieve storageStats in $collStats stage: "
<< status.reason());
}
}
if (_collStatsSpec.hasField("count")) {
Status status = pExpCtx->mongoProcessInterface->appendRecordCount(
pExpCtx->opCtx, pExpCtx->ns, &builder);
if (!status.isOK()) {
uasserted(40481,
str::stream() << "Unable to retrieve count in $collStats stage: "
<< status.reason());
}
}
return {Document(builder.obj())};
}
Value DocumentSourceCollStats::serialize(boost::optional<ExplainOptions::Verbosity> explain) const {
return Value(Document{{getSourceName(), _collStatsSpec}});
}
} // namespace mongo
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