@startuml

' --- Command STATE DIAGRAM ---
' (see http://plantuml.com/fr/state-diagram)

title
__**models.Command class : State Diagram**__

end title

[*] --> PENDING : **created by sender**

' --- (1) PENDING ---
PENDING: + s_deposit_time \n+ r_read_time
PENDING --> RUNNING : **launched**
PENDING --> SKIPPED: **recipient is IDLE**
PENDING --> EXPIRED: **command is too old**
PENDING --> INVALIDATED: **cancelled by sender**

' --- (2) RUNNING, SKIPPED, or EXPIRED ---
RUNNING: + r_start_time
RUNNING --> EXECUTED : **finished**
RUNNING --> KILLED: \l**aborted** \n(by sender or other allowed agent, \nwith command "abort" or "exit")

SKIPPED: + end_time
SKIPPED --> [*]

EXPIRED --> [*]
EXPIRED: + end_time \n+ killer_agent_name

INVALIDATED --> [*]
INVALIDATED: + end_time \n+ killer_agent_name

' --- (3) PROCESSED or KILLED ---
EXECUTED: + end_time
EXECUTED --> [*]

KILLED --> [*]
KILLED: + end_time \n+ killer_agent_name

@enduml