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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/ftdc/collector.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/bsonmisc.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/client.h"
#include "mongo/db/ftdc/constants.h"
#include "mongo/db/ftdc/util.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/operation_context.h"
#include "mongo/util/time_support.h"
namespace mongo {
void FTDCCollectorCollection::add(std::unique_ptr<FTDCCollectorInterface> collector) {
// TODO: ensure the collectors all have unique names.
_collectors.emplace_back(std::move(collector));
}
std::tuple<BSONObj, Date_t> FTDCCollectorCollection::collect(Client* client) {
// If there are no collectors, just return an empty BSONObj so that that are caller knows we did
// not collect anything
if (_collectors.empty()) {
return std::tuple<BSONObj, Date_t>(BSONObj(), Date_t());
}
BSONObjBuilder builder;
Date_t start = client->getServiceContext()->getPreciseClockSource()->now();
Date_t end;
bool firstLoop = true;
builder.appendDate(kFTDCCollectStartField, start);
// All collectors should be ok seeing the inconsistent states in the middle of replication
// batches. This is desirable because we want to be able to collect data in the middle of
// batches that are taking a long time.
auto txn = client->makeOperationContext();
txn->lockState()->setShouldConflictWithSecondaryBatchApplication(false);
for (auto& collector : _collectors) {
BSONObjBuilder subObjBuilder(builder.subobjStart(collector->name()));
// Add a Date_t before and after each BSON is collected so that we can track timing of the
// collector.
Date_t now = start;
if (!firstLoop) {
now = client->getServiceContext()->getPreciseClockSource()->now();
}
firstLoop = false;
subObjBuilder.appendDate(kFTDCCollectStartField, now);
{
ScopedTransaction st(txn.get(), MODE_IS);
collector->collect(txn.get(), subObjBuilder);
}
end = client->getServiceContext()->getPreciseClockSource()->now();
subObjBuilder.appendDate(kFTDCCollectEndField, end);
}
builder.appendDate(kFTDCCollectEndField, end);
return std::tuple<BSONObj, Date_t>(builder.obj(), start);
}
} // namespace mongo
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