* Use the new class EventMetric to cleanup and simplify the implementation
* Replaced the single metric for Topology Events with four metrics
(last event timestamp and event rate):
- Device Event metrics
- Host Event metrics
- Link Event metrics
- Topology Graph metrics
Change-Id: I2acc06ab84ef3ca06d0d383983dfcff9774ff341
It can be used as an Intent-related event and event metrics collector.
It can be loaded by one of the following two (new) features:
onos-app-metrics, onos-app-metrics-intent
After loading the module, it subscribes for intent-related events
and keeps the following state:
(a) The last 100 events
(b) The timestamp of the last event (ms after epoch) as observed by this
module for each event type: SUBMITTED, INSTALLED, WITHDRAWN.
The missing event type is the equivalent of "Withdraw Requested"
(c) The rate of each intent event type: count, median rate, average rate
over the last 1, 5 or 15 minutes
The following CLI commands are added:
* onos:intents-events
Shows the last 100 intent events
* onos:intents-events-metrics
Shows the timestamp of the last event (ms after epoch) as observed by
this module for each event type, and the rate of the topology
events (for each event type): see (b) and (c) above
Change-Id: I9f23e9086bbd433b8f24283539abdeb97e199e2e
