[rules-users] Drools Expert: monitor rules & report activity

[Dieter D'haeyere]

Ok, this looks like a way to handle it.
But does this mean that there is no 'out of the box' monitoring possibility
?

When deploying a rule base (with Guvnor), I would kind of expect that Guvnor
is accessible and that it can return some metrics (eg. after switching on a
monitoring option because I presume continuous logging would slow down the
system too much).

As I understand it now, some custom development is needed will be needed to
achieve 'real-time' monitoring.









2010/8/3 David Sinclair <dsinclair at chariotsolutions.com>

> Have a look at the AgendaEventListener. You can use these callbacks to see
> which rules fire and information about them
>
>   void *activationCancelled<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaEventListener.html#activationCancelled%28org.drools.event.rule.ActivationCancelledEvent%29>
> *(ActivationCancelledEvent<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/ActivationCancelledEvent.html>
>  event)
>               void *activationCreated<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaEventListener.html#activationCreated%28org.drools.event.rule.ActivationCreatedEvent%29>
> *(ActivationCreatedEvent<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/ActivationCreatedEvent.html>
>  event)
>               void *afterActivationFired<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaEventListener.html#afterActivationFired%28org.drools.event.rule.AfterActivationFiredEvent%29>
> *(AfterActivationFiredEvent<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AfterActivationFiredEvent.html>
>  event)
>               void *agendaGroupPopped<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaEventListener.html#agendaGroupPopped%28org.drools.event.rule.AgendaGroupPoppedEvent%29>
> *(AgendaGroupPoppedEvent<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaGroupPoppedEvent.html>
>  event)
>               void *agendaGroupPushed<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaEventListener.html#agendaGroupPushed%28org.drools.event.rule.AgendaGroupPushedEvent%29>
> *(AgendaGroupPushedEvent<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaGroupPushedEvent.html>
>  event)
>               void *beforeActivationFired<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/AgendaEventListener.html#beforeActivationFired%28org.drools.event.rule.BeforeActivationFiredEvent%29>
> *(BeforeActivationFiredEvent<http://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/trunk/target/javadocs/stable/drools-api/org/drools/event/rule/BeforeActivationFiredEvent.html>
>  event)
>
> 2010/8/3 Dieter D'haeyere <dieter.dhaeyere at gmail.com>
>
>> @ll,
>> I have a question regarding the possibilities to monitor and report on the
>> rules activity.
>> I have seen that with Drools Guvnor, it is perfectly possible to monitor
>> scenario's, see what rules fired, etc.
>>
>> Now, going further, I have two questions:
>> - Is it possible to monitor rule activity (which rules got fired etc) in a
>> production situation.  Eg. Is it possible to start recording activity at
>> some time until a proble occured and to review the logs afterwards.  This
>> would be of use when scenario's are not covering all possible cases.
>> - Is it possible to produce reports on rules, usage of rules (eg. what
>> rules are fired and what rules were fired most), performance, ...
>> And if not, what could be a good starting point to create them ?
>>
>> My experience with Drools is rather limited.  Let's say that I am
>> interested in expert system and technologies surrounding it.  At this moment
>> I am getting a 'theoretical' grip on Drools and its possibilities (of
>> course, I couldn't help also creating some kind of poc :)  ).
>>
>> Sincerely,
>> Dieter D'haeyere.
>>
>>
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>>
>
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