org.jwall.audit.rules

Class EventRuleEngine<E extends Event>

java.lang.Object

org.jwall.audit.rules.EventRuleEngine<E>

Type Parameters:

E -

All Implemented Interfaces:

EventProcessor<E>

Direct Known Subclasses:

AuditEventRuleEngine

public abstract class EventRuleEngine<E extends Event>
extends Object
implements EventProcessor<E>

A simple engine that will sequentially process rules for an event. If any of that rules does flag the event as DELETED, then rule processing will be stopped.

Author:

Christian Bockermann <chris@jwall.org>

Field Summary

Fields inherited from interface org.jwall.audit.EventProcessor

DELETE_FLAG

Constructor Summary

Constructors

Constructor and Description
EventRuleEngine()

Method Summary

Modifier and Type	Method and Description
protected void	execute(EventRule<E> rule, E event, Map<String,Object> context) This method executes the actions of a rule for a given event.
List<EventRule<E>>	getRules()
protected boolean	matches(EventRule<E> rule, E event, RuleContext context)
E	processEvent(E event, Map<String,Object> context) This method is called upon event reception.
void	setRules(List<EventRule<E>> rules)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EventRuleEngine

public EventRuleEngine()

Method Detail

getRules

public List<EventRule<E>> getRules()

Returns:

the rules

setRules

public void setRules(List<EventRule<E>> rules)

Parameters:

rules - the rules to set

processEvent

public final E processEvent(E event,
                            Map<String,Object> context)
                     throws Exception

Description copied from interface: EventProcessor

This method is called upon event reception. The given map provides a context to communicate data between several event-processors. The implementor of this interface needs to take care that calls to this class my come from different threads, i.e. no state should be stored in the class to diminish the risk of concurrency problems.

Specified by:

processEvent in interface EventProcessor<E extends Event>

Returns:

Throws:

Exception

See Also:

EventProcessor.processEvent(org.jwall.audit.Event, java.util.Map)

matches

protected boolean matches(EventRule<E> rule,
                          E event,
                          RuleContext context)
                   throws Exception

Throws:

Exception

execute

protected void execute(EventRule<E> rule,
                       E event,
                       Map<String,Object> context)

This method executes the actions of a rule for a given event.

Parameters:

rule -

event -