Package org.evrete.api

Interface ActivationManager

All Superinterfaces:

Predicate<RuntimeRule>

public interface ActivationManager
extends Predicate<RuntimeRule>

Activation manager controls whether an active rule should really fire based on the history of previous activations. Each session is provided with its own instance of activation manager.

Method Summary

Modifier and Type	Method	Description
default void	onActivation(RuntimeRule rule, long count)	This method is called after rule activation.
default void	onAgenda(int sequenceId, List<RuntimeRule> agenda)	This method is called once for each memory change and before any rule activations.
default boolean	test(RuntimeRule rule)

Methods inherited from interface java.util.function.Predicate

and, negate, or

Method Detail

onAgenda

default void onAgenda(int sequenceId,
                      List<RuntimeRule> agenda)

This method is called once for each memory change and before any rule activations. A unique sequence id is supplied as an argument so that developers could distinguish the initial fire and subsequent changes in the working memory caused by RHS calls.

Parameters:

sequenceId - memory task counter starting at zero (initial session fire)

agenda - rules that are activated by current changes in the working memory.

test

default boolean test(RuntimeRule rule)

Specified by:

test in interface Predicate<RuntimeRule>

Parameters:

rule - the rule to be allowed or disallowed for activation

Returns:

true if the rule needs to be activated

onActivation

default void onActivation(RuntimeRule rule,
                          long count)

This method is called after rule activation. Developers use this method to track activation history. this manager's test() method

Parameters:

rule - the rule that has been activated

count - the number of times the rule's RHS part has been called