Salut all!
I'm talking about sequence diagrams
So, synchronous message to the lifeline should invoke a start occurrence of execution specification, right?
1) What "synchronous answer" means?
a) it's just an answer to synchronous message
b) this answer in turn waits for a reply
Same question:
2) What is "asynchronous answer" means"
a) it's just an answer to asynchronous message
b) this answer does not care about continuing communications
Third question:
does answer type must correspond to type of a message? i.e. you cannot give asynchronous answer to synchronous message?
gives an example of type mismatch between message and answer.
Personally, I intuitively suppose that 1=a and 2=b, and "HTTP-202 Accepted" is surely asynchronous answer for "wannabe synchronous" message "GET http://"
You can note that HTTP-202 in some situation means that server either forwarded this message to some upstream servers and can sleep, or undertook long heavy processing of this message while replying "heard" instantly. Id est, HTTP-202 as sample of kinda asynchronous answer does not specify lifetime of a server.
Finally, the main question is:
Does reply anyhow define lifetime ending of a process?
I entered this script
title async reply kills lifebar
activecolor #lightgreen
autoactivation //option to avoid issuing "activate participant" manually
autonumber
activate A
A->>B: sudo make me a sandiwch
note right of B:this is async message\nwhich does not require an answer
B-->>A:okay.
//activate B //patch for autodeactivation behaviour
note right of B:therefore async reply\nshould not deactivate a lifebar,\nbut does
B->Fridge:I want a sandwich
Fridge-->B: here you go
B-->A: here's your sandwich
and I behold end of execution of B at the line 2) B-->>A:okay.
Is it necessary or recommended to stop execution on asynchronous answer?
Is it necessary or recommended to stop execution on synchronous answer?
Is it necessary or recommended to stop execution on any replying to synchronous message?
Is it necessary or recommended to stop execution on any replying to asynchronous message?
Thank you!