@startuml
' Copyright (C) 2018 The Android Open Source Project
'
' Licensed under the Apache License, Version 2.0 (the "License");
' you may not use this file except in compliance with the License.
' You may obtain a copy of the License at
'
'      http://www.apache.org/licenses/LICENSE-2.0
'
' Unless required by applicable law or agreed to in writing, software
' distributed under the License is distributed on an "AS IS" BASIS,
' WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
' See the License for the specific language governing permissions and
' limitations under the License.

' Compile with PlantUML:
' http://www.plantuml.com/plantuml/uml/


'hide footbox

participant "system_server" as ss
participant iorapd

autonumber 1 0 "Request [00]:"

ss -\ iorapd : onSomeEvent
activate iorapd
note right of iorapd
  start processing event
end note

loop 1 or more times
iorapd -\ ss : onProgress

autonumber stop
iorapd -> iorapd : workload in progress
autonumber resume

end

' some time later...
... ...

note right of iorapd
  finish processing event
end note


iorapd -\ ss : onComplete

deactivate iorapd
@enduml