NFD

Task #1199

Updated by Junxiao Shi about 10 years ago

Develop `StatusServer` that collects forwarder-level statistics, and provides them in response to [[ControlCommand]]. 

 The statistics provided by this module are forwarder-level statistics: statistics, similar to these ndnd elements: 

     <identity> 
         <ndndid>E8899730656229D0BBB44A6C4765BC5D2CE02E84FA1FD9F828FC81C859320376</ndndid> 
         <apiversion>7002</apiversion> 
         <starttime>1387395370.438293</starttime> 
         <now>1391813608.640285</now> 
     </identity> 
     <cobs> 
         <accessioned>1292792</accessioned> 
         <stored>54944</stored> 
         <stale>54933</stale> 
         <sparse>7</sparse> 
         <duplicate>170219</duplicate> 
         <sent>2036751</sent> 
     </cobs> 
     <interests> 
         <names>531</names> 
         <pending>5</pending> 
         <propagating>6</propagating> 
         <noted>91</noted> 
         <accepted>82875607</accepted> 
         <dropped>2654120</dropped> 
         <sent>166594337</sent> 
         <stuffed>351827</stuffed> 
     </interests> 

 * current number of NameTree entries 
 * current number of FIB entries 
 * current number of PIT entries (regardless of whether it is pending or satisfied) 
 * current number of Measurements entries 
 * current number of CS entries 
 * total number of incoming Interests since forwarder starts 
 * total number of outgoing Interests since forwarder starts 
 * total number of incoming Datas since forwarder starts 
 * total number of outgoing Datas since forwarder starts 

 The `StatusServer` class does not provide: 

 * face counters: #1245 in `FaceManager` 
 * FIB entries: #1192 in `FibManager` 

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