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Daniel Gebler wrote:
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<div class="Section1">
<p class="MsoNormal">For our integration of Drools 5.0 we want to
provide end users
with limited technical skills the possibility to debug, trace and
visualize the
rule execution as well as the fact base.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Questions that are frequently asked by users as
well as by
the development/qa team:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Did my rule r1 fire for this query?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Why did rule r1 not fire (i.e. which
constraint
doesn’t match)?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Which kind of rule dependencies
(chaining) do I have in
my rule base? Rule r1 and r2 are dependent iff action of r1 (e.g.
publish a
fact) makes constraint of r2 true.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Which rules need to fire in order to
generate the
additional fact f1 in the fact base?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->What is the smallest change in the fact
base
(additional facts etc.) in order to make rule r1 to fire (abduction)?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Problems:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Eclipse plugin doesn’t provide
information of
what didn’t happen and why it didn’t happen ( ‘Audit’
view allows just tracking of positive cases, i.e. what happened).
Furthermore
the stability of the eclipse plugin seems to be limited.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Integrating over SPI doesn’t allow to
show the
Rete network because Rete view works only with drl files<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">-<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->How to provide feedback to a normal end
user of the
search server (limited tech skills) about rule-related information?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="">Solution ideas/approaches + our
assessment:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">1.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Use
a run time monitor providing on-demand log trace information when facts
are
being published. The log trace provides the information about which
and
why a particular constraint is or is not satisfied. Our initial
implementation uses
an aspect oriented approach (JBoss AOP) to gather relevant information.
In
detail: Our initial implementation uses an aspect oriented approach
(JBoss AOP)
to gather the information by intercepting
EntryPointNode.assertObject(), and
traversing the rete network to collect the constraint information for
every
unique alpha/join node. This will allow to visualize the log trace
(GUI) and
interpret the trace in the context of our product. We discussed this
approached
in #drools with Edson Tirelli and he was very interested.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent: -0.25in;"><!--[if !supportLists]--><span
style="">2.<span
style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">
</span></span><!--[endif]-->Use drools AgendaEventListener. Listener
does not gets
enough debug info exposed, esp. we cannot extract the cause to reject a
rule.
Not enough information available therefore this one is not an option.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="">Additionally, it would be nice
for our development to also visualize the Rete-OO network, but that
seems to be
impossible when integrating drools directly via the SPI classes. Is
there a way
to connect the viewer to a network inside a running VM?</p>
</div>
</blockquote>
Constructing against the SPI instead of using DRL, you are scaring me
now?<br>
<br>
Mark<br>
<blockquote
cite="mid:000901c9eecb$ae8f2bc0$0bad8340$@gebler@fredhopper.com"
type="cite">
<div class="Section1">
<p class="MsoNormal" style=""><o:p></o:p></p>
<p class="MsoNormal" style=""><o:p> </o:p></p>
<p class="MsoNormal" style="">We would like to hear whether you
know any other opinions, or have points how to implement those
features. Please
share your experience how to bridge the gap between end-users with
limited
technical backgrounds expressing and investigating the rule inference.<o:p></o:p></p>
<p class="MsoNormal" style=""><o:p> </o:p></p>
<p class="MsoNormal" style="">Thanks,<o:p></o:p></p>
<p class="MsoNormal" style="">Daniel<o:p></o:p></p>
</div>
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</blockquote>
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