2:25 p.m.
From: "Roger Tanuatmadja" <rogerst(a)gmail.com>
To: rules-users(a)lists.jboss.org
Date: Mon, 19 May 2008 11:55:19 -0700
Subject: Ruleflow-group attribute causing rule to not fire
Hi,
I am new to both rules engine and Drools. I am currently evaluating Drools
4.0.7 for use in our new project.
Basically I have been writing a bunch of individual rules and things have
been fine, the rules that I expected to fire were fired, etc, etc. I then
proceeded to investigate rule flows. I started innocently enough i.e. adding
the ruleflow-group attribute to some of my rules. I also defined a ruleflow
mapping (.rfm).
I then reran my unit-tests (WITHOUT reading the rules in as rule flows) and
some of my rules were no longer firing!!. I added an Agenda Listener to my
code and
1. without the ruleflow-group attribute, activations were created, and
fired.
2. with the ruleflow-group attribute, activations were created but not
fired.
Using the debugger yielded the same logical outcomes i.e. without the
ruleflow-group attribute, my breakpoints were hit, but with the attribute
specified, none of my breakpoints were hit.
My question is: Is this behavior expected? And why? Especially since some
other rules (with the attribute specified) continued to work. I've read the
documentations as much as possible, but I am really new to this field so I
might not even know what questions to ask either.
Any help would be greatly appreciated.
Thanks,
Roger
7:03 a.m.
New subject: Ruleflow-group attribute causing rule to not fire
This is expected behaviour, let me try to explain.
By adding the ruleflow-group attribute to your rules, you are stating that these rule
should not be executed as normal, but that the order in which these rules should be
executed is specified by a ruleflow. Activations will be created for rules that are part
of a ruleflow-group, but they will only be executed if the ruleflow-group is activated. To
make sure that rules with a ruleflow-group are executed, you must:
1. Create a ruleflow that specifies when the rules should be activated (using ruleset
nodes)
AND
2. Start the ruleflow whenever appropriate. My guess is that you are not starting the
ruleflow, so the corresponding ruleflow-groups are never activated. You can either start
a ruleflow manually in your code
(workingMemory.startProcess("id_of_your_ruleflow"), for example right before
calling workingMemory.fireAllRules()), or using a rule (probably with a high salience)
with as consequence
drools.getWorkingMemory().startProcess("id_of_your_ruleflow").
It is also normal that all other rules that are not tagged with a ruleflow-group attribute
just execute as before, even in the presence of ruleflows, both can be used side by side.
Kris
----- Original Message -----
From: Roger Tanuatmadja
To: rules-users(a)lists.jboss.org
Sent: Monday, May 19, 2008 9:25 PM
Subject: [rules-users] Re: Ruleflow-group attribute causing rule to not fire
From: "Roger Tanuatmadja" <rogerst(a)gmail.com>
To: rules-users(a)lists.jboss.org
Date: Mon, 19 May 2008 11:55:19 -0700
Subject: Ruleflow-group attribute causing rule to not fire
Hi,
I am new to both rules engine and Drools. I am currently evaluating Drools 4.0.7 for
use in our new project.
Basically I have been writing a bunch of individual rules and things have been fine,
the rules that I expected to fire were fired, etc, etc. I then proceeded to investigate
rule flows. I started innocently enough i.e. adding the ruleflow-group attribute to some
of my rules. I also defined a ruleflow mapping (.rfm).
I then reran my unit-tests (WITHOUT reading the rules in as rule flows) and some of my
rules were no longer firing!!. I added an Agenda Listener to my code and
1. without the ruleflow-group attribute, activations were created, and fired.
2. with the ruleflow-group attribute, activations were created but not fired.
Using the debugger yielded the same logical outcomes i.e. without the ruleflow-group
attribute, my breakpoints were hit, but with the attribute specified, none of my
breakpoints were hit.
My question is: Is this behavior expected? And why? Especially since some other rules
(with the attribute specified) continued to work. I've read the documentations as much
as possible, but I am really new to this field so I might not even know what questions to
ask either.
Any help would be greatly appreciated.
Thanks,
Roger
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1:27 p.m.
New subject: Ruleflow-group attribute causing rule to not fire
Thanks Kris,
On 5/21/08, Kris Verlaenen <kris.verlaenen(a)cs.kuleuven.be> wrote:
This is expected behaviour, let me try to explain.
By adding the ruleflow-group attribute to your rules, you are stating that
these rule should not be executed as normal, but that the order in which
these rules should be executed is specified by a ruleflow. Activations will
be created for rules that are part of a ruleflow-group, but they will only
be executed if the ruleflow-group is activated. To make sure that rules with
a ruleflow-group are executed, you must:
1. Create a ruleflow that specifies when the rules should be activated
(using ruleset nodes)
AND
2. Start the ruleflow whenever appropriate. My guess is that you are not
starting the ruleflow, so the corresponding ruleflow-groups are never
activated. You can either start a ruleflow manually in your code
(workingMemory.startProcess("id_of_your_ruleflow"), for example right before
calling workingMemory.fireAllRules()), or using a rule (probably with a high
salience) with as consequence
drools.getWorkingMemory().startProcess("id_of_your_ruleflow").
It is also normal that all other rules that are not tagged with a
ruleflow-group attribute just execute as before, even in the presence of
ruleflows, both can be used side by side.
Kris
----- Original Message -----
*From:* Roger Tanuatmadja <rogerst(a)gmail.com>
*To:* rules-users(a)lists.jboss.org
*Sent:* Monday, May 19, 2008 9:25 PM
*Subject:* [rules-users] Re: Ruleflow-group attribute causing rule to not
fire
From: "Roger Tanuatmadja" <rogerst(a)gmail.com>
> To: rules-users(a)lists.jboss.org
> Date: Mon, 19 May 2008 11:55:19 -0700
> Subject: Ruleflow-group attribute causing rule to not fire
> Hi,
>
> I am new to both rules engine and Drools. I am currently evaluating Drools
> 4.0.7 for use in our new project.
> Basically I have been writing a bunch of individual rules and things have
> been fine, the rules that I expected to fire were fired, etc, etc. I then
> proceeded to investigate rule flows. I started innocently enough i.e. adding
> the ruleflow-group attribute to some of my rules. I also defined a ruleflow
> mapping (.rfm).
>
> I then reran my unit-tests (WITHOUT reading the rules in as rule flows)
> and some of my rules were no longer firing!!. I added an Agenda Listener to
> my code and
> 1. without the ruleflow-group attribute, activations were created, and
> fired.
> 2. with the ruleflow-group attribute, activations were created but not
> fired.
>
> Using the debugger yielded the same logical outcomes i.e. without the
> ruleflow-group attribute, my breakpoints were hit, but with the attribute
> specified, none of my breakpoints were hit.
>
> My question is: Is this behavior expected? And why? Especially since some
> other rules (with the attribute specified) continued to work. I've read the
> documentations as much as possible, but I am really new to this field so I
> might not even know what questions to ask either.
>
> Any help would be greatly appreciated.
>
> Thanks,
>
> Roger
>
>
>
>
------------------------------
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5:41 p.m.
New subject: Rules Repository Migration
Hi Everybody,
I am trying to migrate my rules repository from one environment (App
Server and DB Server) to another. I'm using BRMS. I could not find a lot
of detail in the Drools documentation.
Are following steps sufficient:
1. Export the repository configuration as XML from the initial
server using BRMS.
2. Migrate the database to the new DB Server.
3. Import the repository xml into the new Server thru BRMS.
Is there anything else that needs to be done?
Thanks,
Vikas
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10:13 a.m.
New subject: Error Message
I'm getting this error while importing a rule into BRMS. Can somebody
help me interpret this message:
unknown:2:1 mismatched token: [@1,3:6='when',<17>,2:1];
This email and/or any files or attachments transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they are addressed, and
may contain information that is privileged, confidential and exempt from disclosure under
applicable law. If you are not the intended recipient, or the employee or agent
responsible for delivering the message to the intended recipient, you are hereby notified
that any dissemination, distribution or copying of this e-mail and/or any files or
attachments transmitted with it is strictly forbidden. If you have received this email in
error, please delete the e-mail and/or any files or attachments, and also notify the
system manager (PostMaster(a)mercuryinsurance.com) of the error. Please note that any views
or opinions presented in this email are solely those of the author and do not necessarily
represent those of the company. Finally, the recipient should check this email and any
attachments for the presence of viruses. The company accepts no liability for any damage
caused by any virus transmitted by this email and/or any files or attachments transmitted
with it.
10:56 a.m.
New subject: Error Message
Vikas Phonsa wrote:
I'm getting this error while importing a rule into BRMS. Can somebody
help me interpret this message:
Your DRL is incorrect the "when" in your rule is not expected yet,
meaning that most likely the syntax before it is incorrect.
unknown:2:1 mismatched token: [@1,3:6='when',<17>,2:1];
This email and/or any files or attachments transmitted with it are
confidential and intended solely for the use of the individual or
entity to whom they are addressed, and may contain information that is
privileged, confidential and exempt from disclosure under applicable
law. If you are not the intended recipient, or the employee or agent
responsible for delivering the message to the intended recipient, you
are hereby notified that any dissemination, distribution or copying of
this e-mail and/or any files or attachments transmitted with it is
strictly forbidden. If you have received this email in error, please
delete the e-mail and/or any files or attachments, and also notify the
system manager (PostMaster(a)mercuryinsurance.com) of the error. Please
note that any views or opinions presented in this email are solely
those of the author and do not necessarily represent those of the
company. Finally, the recipient should check this email and any
attachments for the presence of viruses. The company accepts no
liability for any damage caused by any virus transmitted by this email
and/or any files or attachments transmitted with it.
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5 comments
4 participants
participants (4)
-
Kris Verlaenen -
Mark Proctor -
Roger Tanuatmadja -
Vikas Phonsa