Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

Re^9: a State machine with Roles - possible? (class or instance)

by salva (Abbot)
on Jun 01, 2013 at 11:25 UTC ( #1036421=note: print w/ replies, xml ) Need Help??


in reply to Re^8: a State machine with Roles - possible? (class or instance)
in thread a State machine with Roles - possible?

Class::StateMachine::Declarative is the result of my experience developing complex state machines, but for my current kind of problems that may be quite specific, I don't know how that could bend to the problems of other people.

I am still not completely happy with it, but it is true that the current iteration is much better than its predecessors.

Is it possible to use Class::StateMachine in a Role

No, because Class::StateMachine is a metaclass, it plays with the method resolution order (mro) to attain the specific state machine method resolution.

When I designed Class::StateMachine I have a hard time figuring how support the state machine while retaining the full perl object oriented semantics (specifically inheritance and multiple inheritance). But then, when I got to use it for practical matters, I discover that inheritance and state machines do not mix well.

Thinks like defining some states in one class, and others in a subclass, or refining them in the subclass is not a great idea.

It is ok to reuse (via inheritance or roles) the code that implements simple actions, but the state machine definition should be a coherent entity.


Comment on Re^9: a State machine with Roles - possible? (class or instance)

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1036421]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others taking refuge in the Monastery: (3)
As of 2015-07-05 08:17 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (61 votes), past polls