PlantUML: Group the statements

‘group’ keyword is used to group the statements.

 

group.txt

@startuml

title "User login flow"
header "User login"
footer %page% of %lastpage%

Client -> LoginServer: Enter user name
Client -> LoginServer: Enter password
Client -> LoginServer: Submit the form 
LoginServer -> ADServer: Check the credentials

alt#green #lightblue login successful
	ADServer -> LoginServer: Login Successful
	LoginServer -> Client: Login Successful

else Server not accessible

	group#silver "Retry to connect the server"
		loop #00FFF8 "three times"
			LoginServer -> ADServer: Check the credentials
		end
	end

else #gold username is not exists
	ADServer -> LoginServer: Username not found
	LoginServer -> Client: User is not registered with the website

else #red invalid credentials
	ADServer -> LoginServer: Credentials mismatch
	LoginServer -> Client: Invalid username or password

end

@enduml

 

Above snippet generates below diagram.

 

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