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@startuml
'https://plantuml.com/activity-diagram-beta

start
: DME to send Cm Subscription Delete Request;
: NCMP to extract out subscriptionId;
: using subscriptionId , Query all the trackedONGOING ACTIVE Cm Subscriptions;
: Populate details in Cm Notification Subscription Cache;
if (all the Subscription predicates are part of other ongoing Subscriptions ) then (YES)
  : directly delete the subscriptionId from the ongoing subscribers list from DB;
  : mark the subscription delete request as ACCEPTED in the cache;
  : respond back to the client with ACCEPTED ;
else (NO)
 : for all the 'last lights out' predicate information call the DMI Plugin;
 if (DMI Plugin accepts the delete request) then (YES)
    : using the information present in cmNotificationSubscriptionCache, delete the records from DB;
    : mark the subscription delete request as ACCEPTED in the cache;
    : respond back to the client with ACCEPTED;
 else (NO)
    : dont delete any records from DB;
    : mark the subscription delete request as REJECTED in the cache;
    : respond back to the client with REJECTED;
 endif
endif
: cleanup the cache;

stop

@enduml