[Pulp-list] Simple ping service - solution

[Lukas Zapletal]

Hello

here comes my solution. It pings the database, increments the counter, 
measures the lag and also shows the version number.

Example output:

# curl -k -u admin:admin https://xxx/pulp/api/services/ping/
{
   "db_version": 2,
   "ping_duration_ms": "1.68",
   "ping_count": 35
}

The code:

class PingAction(JSONController):

     @JSONController.error_handler
     def GET(self):
         """
         Dummy call that just prints time.
         @return: db_version - current DB version number
         """
         _props_db = get_object_db('properties', ['key'])

         # insert the first entry if there is no such document
         if _props_db.find_one({"key": "ping_service_count"}) == None:
             _props_db.insert({"key": "ping_service_count", "value": 0})

         # increment the counter and return
         _start_time = time.time()
         _props_db.update({"key": "ping_service_count"},
             {"$inc": {"value": 1}})
         count = _props_db.find_one(
                   {"key": "ping_service_count"})['value']

         # return the response
         return self.ok({
           "db_version": VERSION,
           "ping_count": count,
           "ping_duration_ms": str(round((time.time() -
                   _start_time) * 1000, 2)),
           })

Attaching the patch.

Comments?

-- 
Later,
   Lukas "lzap" Zapletal
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