.. index:: monitoring .. _monitoring/0: .. rst-class:: right **protocol** ``monitoring`` ============== Event handlers protocol. The handlers are automatically called by the runtime for messages sent using the ``::/2`` control construct from objects or categories compiled with the ``events`` flag set to ``allow``. | **Availability:** | ``built_in`` | **Author:** Paulo Moura | **Version:** 1:2:0 | **Date:** 2018-11-29 | **Compilation flags:** | ``static, built_in`` | **Dependencies:** | (none) | **Remarks:** | (none) | **Inherited public predicates:** | (none) .. contents:: :local: :backlinks: top Public predicates ----------------- .. index:: before/3 .. _monitoring/0::before/3: ``before/3`` ^^^^^^^^^^^^ Event handler for ``before`` events. A ``before`` event handler may prevent a method from being looked up or called by failing. | **Compilation flags:** | ``static`` | **Template:** | ``before(Object,Message,Sender)`` | **Mode and number of proofs:** | ``before(?term,?term,?term)`` - ``zero_or_more`` ------------ .. index:: after/3 .. _monitoring/0::after/3: ``after/3`` ^^^^^^^^^^^ Event handler for ``after`` events. An ``after`` event handler may prevent a method from succeeding by failing. | **Compilation flags:** | ``static`` | **Template:** | ``after(Object,Message,Sender)`` | **Mode and number of proofs:** | ``after(?term,?term,?term)`` - ``zero_or_more`` ------------ Protected predicates -------------------- (none) Private predicates ------------------ (none) Operators --------- (none)