Roles replace interfaces

• Moonpig::Role::Storage lists a bunch of methods that any storage implementation must define

        requires 'queue_job';
        requires 'iterate_jobs';
        requires 'undone_jobs_for_ledger';

        requires 'save_ledger';
        requires 'ledger_guids';

        requires 'retrieve_ledger_for_guid';
        requires 'retrieve_ledger_for_ident';

        requires 'ledger_guids_for_xid';
        requires 'retrieve_ledger_active_for_xid';
        requires 'retrieve_ledger_unambiguous_for_xid';

• Forget one, it's a compile-time error

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Copyright © 2013 M. J. Dominus