@startuml ../images/01_seq.png

title 
Get Object
Retrieve the object "A"
end title

actor "Client" as client << Application >>
participant "Coordinating\nNode" as CN << Node >>
participant "Node" as MN << Node >>

client -> CN: resolve(A)
activate client
activate CN
CN -> client: object locations
deactivate CN
client -> client: choose location
client -> MN: get(A)
activate MN
MN -> MN: log event
MN -> client: bytes
deactivate MN
deactivate client

'participant "Client" as app_client << Application >>
'participant "Read API" as n_crud << Node >>
'participant "Authorization API" as n_authorize << Node >>
'participant "Object Store" as n_ostore << Node >>
'app_client -> n_crud: get(session, PID)
'n_crud -> n_authorize: isAuthorized(session, PID, READ)
'n_crud <- n_authorize: True, False, Err.NotFound
'alt NotFound
'  app_client <- n_crud: Err.NotFound
'else False
'  app_client <- n_crud: Err.NotAuthorized
'else True
'  n_crud -> n_ostore: read(PID)
'  n_crud <- n_ostore: bytes
'  n_crud --> n_crud: log(PID, READ)
'  app_client <- n_crud: bytes
'end
@enduml