1 files changed, 66 insertions, 0 deletions
diff --git a/src/mongo/db/stats/service_stats.h b/src/mongo/db/stats/service_stats.h
new file mode 100644
index 00000000000..5b0e75fdcb9
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+++ b/src/mongo/db/stats/service_stats.h
@@ -0,0 +1,66 @@
+// 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