built-in method

after/3

Description

after(Object, Message, Sender)

User-defined method for handling after events. This method is declared in the monitoring built-in protocol as a public predicate and is automatically called by the runtime for messages sent using the (::)/2 control construct from within objects compiled with the events flag set to allow.

Note that you can make this predicate scope protected or private by using, respectively, protected or private implementation of the monitoring protocol.

Modes and number of proofs

after(?object_identifier, ?callable, ?object_identifier) - zero_or_more

Errors

(none)

Examples

:- object(...,
    implements(monitoring),
    ...).

    % write a log message when a message is successful:
    after(Object, Message, Sender) :-
        writeq(Object), write('::'), writeq(Message),
        write(' from '), writeq(Sender), nl.

See also

before/3, abolish_events/5, current_event/5, define_events/5