Re: [rules-users] executing ruleflow with AgendaFilter
Hi Kris,
Thank you for quick response and explaining the details.
I thought that the AgendaFilter would cancel the activations and that the
ruleflow would continue. Otherwise it doesn't make much sense to use
AgendaFilter with ruleflow. But if it is not supported I'll have to live
with that :)
My use case: I have lot of rules. I need to be able to turn some rules on
and off depending on user input. I know that I could modify rule conditions
to check if a rule is enabled or not but this means lot of duplicated
conditions that are hard to maintain. I could also use 'rule inheritance'
but it doesn't provide enough flexibility - it supports only single
inheritance.
The problem is a crosscutting concern. It spreads across many rules. An
AgendaFilter seemed like the ideal candidate.
Alternatively, as you've indicated, I could use an AgendaEventListener and
in the activationCreated method cancel the activation. However this will
require use of some Drools internal APIs...
Thanks for your help.
Best regards,
Michal
On Mon, May 25, 2009 at 4:45 PM, Kris Verlaenen
kris.verlae...@cs.kuleuven.be wrote:
Michal,
A ruleset node only continues if the ruleflow group is it associated
with is deactivated. A ruleflow group is deactivated automatically if
it contains no more activations or if you deactivate it manually. By
using an agenda filter, you are not executing the activation and thus
the activation is never removed from the ruleflow group. Therefore, the
process will keep waiting. This is expected behavior. Why were you
expecting it to continue? I guess you would need some other kind of
filter that not prevents the activation from firing but cancels
activations that are not accepted by the filter?
Kris
Quoting Michal Bali michalb...@gmail.com:
Hi,
If a rule is not allowed to fire by an AgendaFilter the whole
ruleflow
stops.
I've created a small test case (attached). It contains:
- one DRL file with one dummy rule that is in some ruleflow-group.
- one RF file with three nodes ('start', 'ruleflow group' and
'end')
- a program that starts the process, and calls fireAllRules with
custom
agenda filter.
Once the program is executed the ruleflow will stop inside the
ruleflow-group. If I remove the agenda filter it works as expected
(the
ruleflow finishes).
Tested with Drools 5.0.1.
Is this a bug or am I missing something?
Best regards,
Michal
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
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Re: [rules-users] executing ruleflow with AgendaFilter
Hey Michal,
What about enabled attribute? Would that work for you?
Of course that when I tried to find the docs on the enabled attribute I
noticed someone actually removed it from there... :(
Basically, enabled takes an MVEL expression as parameter. The
expression can reference any globals, bindings from the LHS (user input),
rule metadata and also are allowed to make external calls to arbitrary java
methods. If the expression returns true, the rule is activated as usual,
while if it returns false, it will not activate for that given tuple.
Since you mentioned based on user input, I am assuming that the user
inputs are either facts or globals.
Example:
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler/src/test/resources/org/drools/integrationtests/test_enabledExpression.drl
So, I guess it would be like moving your logic from the agenda filter
into the enabled expression. If you want, you can wrap that evaluation in a
static method somewhere and call it, obviously.
Hope it helps.
On a side note, AgendaFilters were designed to be used mostly in unit
tests and debug, not as a real modeling feature. Even then, I think we could
improve this interaction between it and flow.
Edson
2009/5/25 Michal Bali michalb...@gmail.com
Hi Kris,
Thank you for quick response and explaining the details.
I thought that the AgendaFilter would cancel the activations and that the
ruleflow would continue. Otherwise it doesn't make much sense to use
AgendaFilter with ruleflow. But if it is not supported I'll have to live
with that :)
My use case: I have lot of rules. I need to be able to turn some rules on
and off depending on user input. I know that I could modify rule conditions
to check if a rule is enabled or not but this means lot of duplicated
conditions that are hard to maintain. I could also use 'rule inheritance'
but it doesn't provide enough flexibility - it supports only single
inheritance.
The problem is a crosscutting concern. It spreads across many rules. An
AgendaFilter seemed like the ideal candidate.
Alternatively, as you've indicated, I could use an AgendaEventListener and
in the activationCreated method cancel the activation. However this will
require use of some Drools internal APIs...
Thanks for your help.
Best regards,
Michal
On Mon, May 25, 2009 at 4:45 PM, Kris Verlaenen
kris.verlae...@cs.kuleuven.be wrote:
Michal,
A ruleset node only continues if the ruleflow group is it associated
with is deactivated. A ruleflow group is deactivated automatically if
it contains no more activations or if you deactivate it manually. By
using an agenda filter, you are not executing the activation and thus
the activation is never removed from the ruleflow group. Therefore, the
process will keep waiting. This is expected behavior. Why were you
expecting it to continue? I guess you would need some other kind of
filter that not prevents the activation from firing but cancels
activations that are not accepted by the filter?
Kris
Quoting Michal Bali michalb...@gmail.com:
Hi,
If a rule is not allowed to fire by an AgendaFilter the whole
ruleflow
stops.
I've created a small test case (attached). It contains:
- one DRL file with one dummy rule that is in some ruleflow-group.
- one RF file with three nodes ('start', 'ruleflow group' and
'end')
- a program that starts the process, and calls fireAllRules with
custom
agenda filter.
Once the program is executed the ruleflow will stop inside the
ruleflow-group. If I remove the agenda filter it works as expected
(the
ruleflow finishes).
Tested with Drools 5.0.1.
Is this a bug or am I missing something?
Best regards,
Michal
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
___
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--
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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Re: [rules-users] executing ruleflow with AgendaFilter
Michal Bali wrote:
Hi Kris,
Thank you for quick response and explaining the details.
I thought that the AgendaFilter would cancel the activations and that
the ruleflow would continue. Otherwise it doesn't make much sense to
use AgendaFilter with ruleflow. But if it is not supported I'll have
to live with that :)
It seems like a reasonable request, that if all the rules have been
cancelled, fired or filtered that the ruleflow-group should be
de-activated so the flow can continue. We'll look into it for 5.1.
Mark
My use case: I have lot of rules. I need to be able to turn some rules
on and off depending on user input. I know that I could modify rule
conditions to check if a rule is enabled or not but this means lot of
duplicated conditions that are hard to maintain. I could also use
'rule inheritance' but it doesn't provide enough flexibility - it
supports only single inheritance.
The problem is a crosscutting concern. It spreads across many
rules. An AgendaFilter seemed like the ideal candidate.
Alternatively, as you've indicated, I could use an AgendaEventListener
and in the activationCreated method cancel the activation. However
this will require use of some Drools internal APIs...
Thanks for your help.
Best regards,
Michal
On Mon, May 25, 2009 at 4:45 PM, Kris Verlaenen
kris.verlae...@cs.kuleuven.be mailto:kris.verlae...@cs.kuleuven.be
wrote:
Michal,
A ruleset node only continues if the ruleflow group is it associated
with is deactivated. A ruleflow group is deactivated automatically if
it contains no more activations or if you deactivate it manually. By
using an agenda filter, you are not executing the activation and thus
the activation is never removed from the ruleflow group.
Therefore, the
process will keep waiting. This is expected behavior. Why were you
expecting it to continue? I guess you would need some other kind of
filter that not prevents the activation from firing but cancels
activations that are not accepted by the filter?
Kris
Quoting Michal Bali michalb...@gmail.com
mailto:michalb...@gmail.com:
Hi,
If a rule is not allowed to fire by an AgendaFilter the whole
ruleflow
stops.
I've created a small test case (attached). It contains:
- one DRL file with one dummy rule that is in some ruleflow-group.
- one RF file with three nodes ('start', 'ruleflow group' and
'end')
- a program that starts the process, and calls fireAllRules with
custom
agenda filter.
Once the program is executed the ruleflow will stop inside the
ruleflow-group. If I remove the agenda filter it works as expected
(the
ruleflow finishes).
Tested with Drools 5.0.1.
Is this a bug or am I missing something?
Best regards,
Michal
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
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Re: [rules-users] RuleBase.removeRule leads to NoClassDefFoundError
Hi Edson, Thanks for your reply. Unfortunately, that is not yet an option for us, since we're still on JDK 1.4.2. We're working on upgrading to JDK 1.6, but that requires an upgrade of our different client applications as well (~25 apps with varying degree of maintenance personell assigned), and will probably not be in place until earliest Q4 this year (i.e. about six months). Until that time, we'll have to live with the current situation. Regards, Steinar Haugen 2009/5/25 Edson Tirelli tire...@post.com Hi Steiner, Did you tried Drools 5? We fixed a couple bugs related to package add/remove in the Drools 5 codebase. []s Edson 2009/5/25 Steinar Haugen steinar.hau...@gmail.com We found the reason for this behaviour, it is a bug which we reported in Jira: https://jira.jboss.org/jira/browse/JBRULES-2098 See the Jira issue for details, code examples reproducing the issue and for a workaround. Regards, Steinar Haugen -- View this message in context: http://www.nabble.com/RuleBase.removeRule-leads-to-NoClassDefFoundError-tp23657476p23707100.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Drools Flow question
Let's say I have a flow: start - step1 - step2 - step3 - end. We execute the flow and it fails at step 3. To be more concrete let's assume that we are talking of provisioning of some items. Since we do not want to provision the same items twice we obviously do not want to repeat steps 1 and 2 when we re-execute the process . The question is: is it responsibility of the user to skip those steps or the engine has some mechanism of tracing that? -- View this message in context: http://www.nabble.com/Drools-Flow-question-tp23726193p23726193.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] executing ruleflow with AgendaFilter
Hi Edson,
I was thinking about the enabled attribute but I didn't know it accepts mvel
expressions. That will certainly work. Thanks for letting me know.
For me, the benefit of AgendaFilter is that all this filtering is localized
in one place. With the 'enabled attribute' it still has to be applied to
each individual rule. With an AgendaFilter I could do stuff like 'fillter
everything except ...'. I can also easily add new types of AgendaFilters or
combine multiple AgendaFilters into one CompositeAgendaFilter.
I guess both approaches have their advantages and disadvantages.
Thank you.
Best regards,
Michal
2009/5/26 Edson Tirelli tire...@post.com
Hey Michal,
What about enabled attribute? Would that work for you?
Of course that when I tried to find the docs on the enabled attribute I
noticed someone actually removed it from there... :(
Basically, enabled takes an MVEL expression as parameter. The
expression can reference any globals, bindings from the LHS (user input),
rule metadata and also are allowed to make external calls to arbitrary java
methods. If the expression returns true, the rule is activated as usual,
while if it returns false, it will not activate for that given tuple.
Since you mentioned based on user input, I am assuming that the user
inputs are either facts or globals.
Example:
http://anonsvn.le
metadatajboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler/src/test/resources/org/drools/integrationtests/test_enabledExpression.drlhttp://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler/src/test/resources/org/drools/integrationtests/test_enabledExpression.drl
So, I guess it would be like moving your logic from the agenda filter
into the enabled expression. If you want, you can wrap that evaluation in a
static method somewhere and call it, obviously.
Hope it helps.
On a side note, AgendaFilters were designed to be used mostly in unit
tests and debug, not as a real modeling feature. Even then, I think we could
improve this interaction between it and flow.
Edson
2009/5/25 Michal Bali michalb...@gmail.com
Hi Kris,
Thank you for quick response and explaining the details.
I thought that the AgendaFilter would cancel the activations and that the
ruleflow would continue. Otherwise it doesn't make much sense to use
AgendaFilter with ruleflow. But if it is not supported I'll have to live
with that :)
My use case: I have lot of rules. I need to be able to turn some rules on
and off depending on user input. I know that I could modify rule conditions
to check if a rule is enabled or not but this means lot of duplicated
conditions that are hard to maintain. I could also use 'rule inheritance'
but it doesn't provide enough flexibility - it supports only single
inheritance.
The problem is a crosscutting concern. It spreads across many rules. An
AgendaFilter seemed like the ideal candidate.
Alternatively, as you've indicated, I could use an AgendaEventListener and
in the activationCreated method cancel the activation. However this will
require use of some Drools internal APIs...
Thanks for your help.
Best regards,
Michal
On Mon, May 25, 2009 at 4:45 PM, Kris Verlaenen
kris.verlae...@cs.kuleuven.be wrote:
Michal,
A ruleset node only continues if the ruleflow group is it associated
with is deactivated. A ruleflow group is deactivated automatically if
it contains no more activations or if you deactivate it manually. By
using an agenda filter, you are not executing the activation and thus
the activation is never removed from the ruleflow group. Therefore, the
process will keep waiting. This is expected behavior. Why were you
expecting it to continue? I guess you would need some other kind of
filter that not prevents the activation from firing but cancels
activations that are not accepted by the filter?
Kris
Quoting Michal Bali michalb...@gmail.com:
Hi,
If a rule is not allowed to fire by an AgendaFilter the whole
ruleflow
stops.
I've created a small test case (attached). It contains:
- one DRL file with one dummy rule that is in some ruleflow-group.
- one RF file with three nodes ('start', 'ruleflow group' and
'end')
- a program that starts the process, and calls fireAllRules with
custom
agenda filter.
Once the program is executed the ruleflow will stop inside the
ruleflow-group. If I remove the agenda filter it works as expected
(the
ruleflow finishes).
Tested with Drools 5.0.1.
Is this a bug or am I missing something?
Best regards,
Michal
Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
___
rules-users mailing list
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JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
[rules-users] moving average rule
Hello, I am trying to write a rule for a moving average over values over the last minute using fusion. In general I can't seem to locate a detailed resource for authoring syntax for these types of rules or rules in general, but specifically, I tried to modify something from the fusion documentation for my purposes using the StockTicker fusion sample. Here is the rule entry I aded to the broker.drl: rule Alert when moving average goes below 50 when Number( doubleValue 127 ) from accumulate( StockTick( symbol == ORCL, $price: price ) over window:time( 1m ), average( $price ) ) then System.out.println(moving average has gone beyone moving average); End I basically want to be alerted any time the moving average for ORCL moves above 127 (or whatever criteria I set.I picked that based on the sample data the sample fusion project uses), but it doesn't seem to be working. I guess if I could locate the definitave samples or guide for authoring these types of rules I could use that, but it's very difficult to piece together how to author rules utilizing fusion features based on isolated snippets from the fusion guide. Can anyone point me to some reasources for learning rule authoring, especially for taking advantage of the fusion features. Thanks, Chris ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] moving average rule
Chris, Fusion is an extension of Drools Expert. Think about it as all Expert features + some additional features. That is why Drools Fusion docs is just a list of features explained. I assume you looked here already: http://www.jboss.org/drools/documentation.html For both, expert and fusion docs. So, back to your rule, syntax seems correct to me. Why do you say it is not working? What error or symptoms do you see? []s Edson 2009/5/26 Chris Richmond crichm...@referentia.com Hello, I am trying to write a rule for a moving average over values over the last minute using fusion. In general I can’t seem to locate a detailed resource for authoring syntax for these types of rules or rules in general, but specifically, I tried to modify something from the fusion documentation for my purposes using the StockTicker fusion sample. Here is the rule entry I aded to the broker.drl: *rule* Alert when moving average goes below 50 *when* Number( doubleValue 127 ) *from* *accumulate*( StockTick( symbol == ORCL, $price: price ) over window:time( 1m ), average( $price ) ) *then* System.out.println(moving average has gone beyone moving average); *End* * * I basically want to be alerted any time the moving average for ORCL moves above 127 (or whatever criteria I set…I picked that based on the sample data the sample fusion project uses), but it doesn’t seem to be working. I guess if I could locate the definitave samples or guide for authoring these types of rules I could use that, but it’s very difficult to piece together how to author rules utilizing fusion features based on isolated snippets from the fusion guide. Can anyone point me to some reasources for learning rule authoring, especially for taking advantage of the fusion features. Thanks, Chris ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Rules Effective Date
Hi I am a newbie for Drools and googled for a good time. I would like to know if Drools 4.0.7 and Drools 5 have anything like an Effective Date concept? We have a requirement for having a rule written by the Business Analysts and takes effective for a future date, without restarting the application. Is Rules Engine intelligent enough to pick the rules depending on effective dates? Thanks a lot for your help. SRINI ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] A Question about roadmap on integration between Drools and Apache ODE
Title: Samsung Enterprise Portal mySingle Hi. I'm working for Samsung SDS in Korea as a project leader and in contemplation using Apache ODE and Drools. When I was googling I saw your mail as below (Plz see bold) then I have a question about integration between Apache ODE and Drools. I'd like to use Apache ODE as a business flow and Drools as a business rules on my project because I thinkBPEL is a standard toolsrepresenting business flow. In details I'd like to implement in the way somenode in BPEL flow can call Drools business rules. Would you give me the information about whether and when you're planned to integrate apache ODE into Drools? Thank you in advance JongGeuk Umesh Wankhede wrote: Mark Proctor wrote: Umesh Wankhede wrote: Mark Proctor wrote: Umesh Wankhede wrote: Hi I am trying to evaluate various features (rules and workflow) of Drools 5.0. What I understand from docs (drools-docs-flow.pdf - page 5) is that the Drools flow engine is based on generic process engine that allows the execution of different process languages like RuleFlow, BPEL, OSWorkflow, etc. Although I am able to do PoC (Proof of Concept) with RuleFlow, there isn't any documentation/samples available for using BPEL as process language. Also I don't find any more information on blogs, etc. If anyone has done something similar, please let me know, or any pointers would help. There is no BPEL product, Drools COULD do BPEL, but we haven't made it do so yet. It is more likely we would look to integrate an existing BPEL product like ODE, as the execution engine is the easy bit, it's all the xml manipulations that are time consuming. So that means I would have to go with jBPM for BPEL support (and losing the advantage of tight rule engine integration provided in Drools). How far would be the BPEL support in Drools in the roadmap? If you are going to use BPEL I would recommend ODE, jBPM BPEL is not BPEL 2.0, but 1.0, which is very limited. ODE is likely to be the BPEL engine we integrated into Drools. More importantly though, have a good think on why it is you are using BPEL, as in reality it's generally too low level for end users to use effectively. The primary language would be RuleFlow or jPDL, but we are also looking at BPEL support (product requirements driven). So we have to make a choice between jBPM or Drools 5.0. The latter option looks more suitable for our requirement which provides tightly integrated rule support, but lack of BPEL support currently is making the decision tougher. If you are going to choose a BPEL product, make sure you choose one that supports BPEL 2.0, or you'll be shooting yourself in the foot, Apache ODE is the more complete BPEL 2.0 engine. Thanks Umesh Legal Notice: This transmission, including any attachments, is confidential, proprietary, and may be privileged. It is intended solely for the intended recipient. If you are not the intended recipient, you have received this transmission in error and you are hereby advised that any review, disclosure, copying, distribution, or use of this transmission, or any of the information included therein, is unauthorized and strictly prohibited. If you have received this transmission in error, please immediately notify the sender by reply and permanently delete all copies of this transmission and its attachments ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
