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// service_stats.h
/**
* Copyright (C) 2010 10gen 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/>.
*/
#ifndef DB_STATS_SERVICE_STATS_HEADER
#define DB_STATS_SERVICE_STATS_HEADER
#include <string>
#include "../../util/concurrency/spin_lock.h"
namespace mongo {
using std::string;
class Histogram;
/**
* ServiceStats keeps track of the time a request/response message
* took inside a service as well as the size of the response
* generated.
*/
class ServiceStats {
public:
ServiceStats();
~ServiceStats();
/**
* Record the 'duration' in microseconds a request/response
* message took and the size in bytes of the generated
* response.
*/
void logResponse( uint64_t duration, uint64_t bytes );
/**
* Render the histogram as string that can be used inside an
* HTML doc.
*/
string toHTML() const;
private:
SpinLock _spinLock; // protects state below
Histogram* _timeHistogram;
Histogram* _spaceHistogram;
ServiceStats( const ServiceStats& );
ServiceStats operator=( const ServiceStats& );
};
} // namespace mongo
#endif // DB_STATS_SERVICE_STATS_HEADER
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