Guvnor is a user interface used to define sets of rules, it’s not designed to be an actual execution server – the demo test scenarios only work on static predefined data, in a real execution environment the input data has to be acquired/loaded from somewhere dynamically, hence you always need some form of development – though look at the drools execution server to minimize this.

What do you actually mean by covering all possible cases anyway? Possible cases of what? What are you trying to detect?

Thomas

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Dieter D'haeyere
Sent: 03 August 2010 14:35
To: Rules Users List
Subject: Re: [rules-users] Drools Expert: monitor rules & report activity

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@chariotsolutions.com>

Have a look at the AgendaEventListener. You can use these callbacks to see which rules fire and information about them

`void`	`activationCancelled(ActivationCancelledEvent event)`
`void`	`activationCreated(ActivationCreatedEvent event)`
`void`	`afterActivationFired(AfterActivationFiredEvent event)`
`void`	`agendaGroupPopped(AgendaGroupPoppedEvent event)`
`void`	`agendaGroupPushed(AgendaGroupPushedEvent event)`
`void`	`beforeActivationFired(BeforeActivationFiredEvent event)`

2010/8/3 Dieter D'haeyere <dieter.dhaeyere@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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