@startuml
:getService;
note right
  In any thread.
  Get on demand only.
  Do not cache result.
  Do not request in constructor unless needed.
end note

if (Is Light Service) then (yes)
else (no)
  if (Is Service Declaration Found) then (yes)
  else (no)
    :Return ""null"";
    detach
  endif
endif

if (Is Created and Initialized?) then (yes)
else (no)
  if (Is Container Active?) then (active)
    partition "synchronized on service class" {
      if (Is Created and Initialized?) then (yes)
      else (no)
        if (Is Initializing?) then (yes)
          :Throw ""PluginException""
          Cyclic Service Initialization;
          detach
        else (no)
          partition "non cancelable" {
            :Create Instance]
            note right
              Avoid getting other services to reduce initialization tree.
              As less dependencies, as more faster and reliable.
            end note

            :Register to be Disposed on Container Dispose
            if Implements ""Disposable""]
            :Load Persistent State
            if Implements ""PersistentStateComponent""]
          }
        endif
      endif
    }
  else (disposed or dispose in progress)
    :Throw ""ProcessCanceledException"";
    detach
  endif
endif

:Return Instance;

@enduml