I would allow the user to specify or pass the delegating classes or objects in the constructor for C. Basically, I'd change the interface to

my $c = C::Enhanced->new(
    c1 => C1::Enhanced->new(),
    c2 => 'C::C2::Better', # will implicitly call C::C2::Better->new()
);

[download]

It seems to me that C only specifies the workflow while C1, C2 etc. supply the worker implementation. I really wouldn't want to write new C classes just to change the implementation of the workers when the workflow itself remains the same. I would want to be able to load such a workflow configuration from a configuration file, which to me means that it should be specified as parameters to C, not as subclasses of C.

In reply to Re: Test bed example: How to acheive plug-in for complex object? by Corion
in thread Test bed example: How to acheive plug-in for complex object? by John M. Dlugosz

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