issue with 'forall'
by Michal Bali
Hi,
I have encountered the following problem with the latest Drools 5.1 SNAPSHOT
I've created a sample Drools project and replaced the Sample.drl with the
following:
--Sample.drl--------------------------------------
package com.sample
import com.sample.DroolsTest.Message;
rule "Hello World"
when
forall( Message( )
Message() )
then
System.out.println("executed");
end
--------------------------------------------
If I run the sample application like this everything is fine - "executed"
is printed. However, if I modify the main method and insert some additional
fact just before the message fact is inserted, like this:
--DroolsTest.java-----------------------------------
.....
ksession.insert(new Object());
ksession.insert(message);
.....
-----------------------------------------------------------
then the rule won't fire any more.
Please note that if you change the fact insertion order (first the message
then the Object) it will work as expected.
Is this a bug or am I missing something? I can file a JIRA if needed.
Thank you!
Best regards,
Michal
16 years, 2 months
ClassCastException: org.drools.reteoo.RuleTerminalNode$TerminalNodeMemory cannot be cast to org.drools.reteoo.EvalConditionNode$EvalMemory
by Paul Ryan
Hi all,
We're receiving some error messages that we don't understand from rules that had conditionals that worked and now don't (no upgrade or anything like that, they just stopped working), any clues as to what kinds of things to look for when we get an error like the following? (if not we can try to pair down to an a test case)
org.drools.runtime.rule.ConsequenceException: java.lang.ClassCastException: org.drools.reteoo.RuleTerminalNode$TerminalNodeMemory cannot be cast to org.drools.reteoo.EvalConditionNode$EvalMemory
at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943)
at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885)
at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1086)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:660)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:627)
at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:183)
at com.infotrustgroup.rules.engine.RulesManager.runRules(RulesManager.java:353)
at com.infotrustgroup.util.rules.RuleFileUtil.runRules(RuleFileUtil.java:406)
at com.infotrustgroup.util.rules.RuleFileUtil.runRules(RuleFileUtil.java:370)
at com.infotrustgroup.util.rules.RuleRunner.run(RuleRunner.java:395)
at com.infotrustgroup.util.rules.RuleRunner.call(RuleRunner.java:193)
at com.infotrustgroup.jobs.services.auth.EditionsRulesJobRunner.runRules(EditionsRulesJobRunner.java:87)
Caused by: java.lang.ClassCastException: org.drools.reteoo.RuleTerminalNode$TerminalNodeMemory cannot be cast to org.drools.reteoo.EvalConditionNode$EvalMemory
at org.drools.reteoo.EvalConditionNode.retractLeftTuple(EvalConditionNode.java:199)
at org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateRetractLeftTuple(CompositeLeftTupleSinkAdapter.java:159)
at org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateRetractLeftTuple(CompositeLeftTupleSinkAdapter.java:68)
at org.drools.reteoo.JoinNode.retractLeftTuple(JoinNode.java:231)
at org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:239)
at org.drools.reteoo.EntryPointNode.retractObject(EntryPointNode.java:195)
at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1416)
at org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1360)
at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:141)
at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:154)
at com.infotrustgroup.what.Rule_Transform_SGML_to_XML_0.consequence(Rule_Transform_SGML_to_XML_0.java:48)
at com.infotrustgroup.what.Rule_Transform_SGML_to_XML_0ConsequenceInvoker.evaluate(Rule_Transform_SGML_to_XML_0ConsequenceInvoker.java:34)
at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934)
... 11 more
Thanks in advance for your help with this,
-- Paul Ryan
16 years, 2 months
Guvnor meant for business users?
by nxg912
Hello All,
We are evaluating Drools for our production implementation with special
focus on the fact that it would let less technical people be able to work
effectively with business logic (once developers provide them with a data
model). We are relatively new to Drools and our impression has not been too
good specially around Guvnor (given that DRL is meant for developers and DSL
is nothing but a simple extension for DRL which business analyst won't be
able to use). Has anyone here used Guvnor or DSL effectively for a
reasonable size implementation?
With Guvnor we are facing some issue which are very basic and Guvnor comes
across as a immature web application from the UI perspective (Because of
being less user friendly, incomplete messages for error situations etc).
Also, its difficult to find help on some simple scenario like the following,
We have a "Customer" class and a "Agreement" class with one to many
relationship. We are trying to build a simple rule that if an "Agreement"
has missed payment (indicated by a boolean inside Agreement class), mark
that "Customer" as bad customer by setting the boolean field inside the
"Customer" class. Its a simple scenario to be build in DRL but how to we
implement this under 'WHEN' and 'THEN' section in guided editor without
using the DRL free forms? It shows an error message that access/write
property for Customer not available in Agreement.
Any thoughts or help in these matters will be really helpful. Also, if there
are some helpful links around Drools that would help getting started with
the implementation, that would be great!
Thanks in advance.
--
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16 years, 2 months
Plugtree’s training course for Drools(tm) in June
by Esteban Aliverti
Hi people! I’m glad to announce that we (Plug Tree: http://plugtree.com)
are preparing a Plugtree’s training course for Drools(tm) during June in
Boston and/or NY the week after the Redhat(tm) Summit.
These courses are going to cover all the Drools(tm) juicy parts from the
insider perspective of a group of community project committers ;-).
We need to know ASAP who is interested, so we can arrange all the details.
Here you can find more information about the event:
http://plugtree.eventbrite.com/
http://plugtree-ny.eventbrite.com/
Plugtree is not associated in any way with Redhat(tm). Drools is a community
project sponsored by JBoss (tm)
--
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
16 years, 2 months
Drools5 in tomcat 5
by Rubén Marrero
Hi all:
I want to add drools to a php application. Currently we are using Tomcat 5 to execute BIRT reports and works great.
We want to keep using Tomcat (this version in particular) and just drop the Drools WAR so to disturb as little as possible our current setup.
Is Tomcat 5 a supported platform to run Drools 5? any pointers to current docs?
Thanks in advance,
Rubén
16 years, 2 months
Enumeration in Guvnor
by shekharputtur puttur
Hi All,
i have a java class 'Car' with attributes ' String color' and 'int value'
inside a package 'example.test'.
I created a model.jar containing 'Car class',uploaded to guvnor for defining
rules.
For 'color' attribute, I created a enumeration like:
'Car.color' : ['red', 'blue','green']
But when i try to define a rule, this enums are not shown as drop down list.
What would be the problem?
Could anybody give some hints to solve this?
Thanks
Shekar
16 years, 2 months
Drools 5.1 trunk - eclipse plugin "Could not find default Drools runtime"
by Premkumar Stephen
Hi,
I built the source from trunk and added the drools eclipse plugin.
I was asked to create a new Drools 5 Runtime directory.
I pointed it to a directory that has all the jars, but I still get this
error message "Could not find default Drools runtime"
Is there any documentation on how to set up the Drools runtime?
Regards,
Prem
16 years, 2 months
Validation using time driven rule execution
by skasab2s
Hello,
our medical company plans using drools for validation of blood poisoning. In
this situation should be checked, if a patient has blood poisoning (this is
the simple part of the problem). The hard part of the problem is, that some
actions (let's say A, B, and C) should be executed by the doctor after
detecting the blood posisoning in particular order and time frequency (and
we want Drools to check, if they have been executed). Drools should then do
this:
after 10 minutes: check if action A has been executed by the doctor
after 15 minutes: check if action B has been executed by the doctor
after 20 minutes: check if action C has been executed by the doctor
Can we do this with one "fireAllRules" (the Java code for triggering drools
has it's own timer and we don't want it to mess our times for executing the
actions)? What should we use: drools expert, drools fusion or drools flow,
in order to implement the given situation? Can you short describe a
solution?
Thanks a lot and many regards,
skasab2s
--
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Sent from the Drools - User mailing list archive at Nabble.com.
16 years, 2 months
IBM ZOS
by Mark Proctor
Has anyone here had any experience of running both the Drools runtime
engine and the the Guvnor BRMS on IBM's ZOS?
Mark
16 years, 2 months
Re: [rules-users] Validation using time driven rule execution
by Greg Barton
If by "has it's own timer" means that the rules are triggered periodically then yes, this is possible, but it's not complete. The reason for this is that you need a heartbeat of some type to enable the rules to reconsider objects. Without this reconsideration the "negative" tests you mention are not possible. (i.e. "it's time X relative to event Y and event Z has not happened"). You can do this a few ways:
1) Have rules you want reconsidered include the heartbeat object in it's conditions. (Least desirable, IMO)
2) Have some rules that match on the heartbeat and any object you want reconsidered. Downstream rules would fire normally.
3) Externally update the objects from 2 above.
There might be a slicker way to do this in fusion without a heartbeat since it uses an internal clock, but specifically with the negative tests I'm not sure what that would be.
GreG
On May 13, 2010, at 3:54, skasab2s <skasab2s(a)smail.inf.fh-brs.de> wrote:
Hello,
our medical company plans using drools for validation of blood poisoning. In
this situation should be checked, if a patient has blood poisoning (this is
the simple part of the problem). The hard part of the problem is, that some
actions (let's say A, B, and C) should be executed by the doctor after
detecting the blood posisoning in particular order and time frequency (and
we want Drools to check, if they have been executed). Drools should then do
this:
after 10 minutes: check if action A has been executed by the doctor
after 15 minutes: check if action B has been executed by the doctor
after 20 minutes: check if action C has been executed by the doctor
Can we do this with one "fireAllRules" (the Java code for triggering drools
has it's own timer and we don't want it to mess our times for executing the
actions)? What should we use: drools expert, drools fusion or drools flow,
in order to implement the given situation? Can you short describe a
solution?
Thanks a lot and many regards,
skasab2s
--
View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Validation-using-time...
Sent from the Drools - User mailing list archive at Nabble.com.
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16 years, 2 months
