Accessing drools rule file in a jar
by Zhang Jing-A52198
Hi All,
I'm trying to load a pkg file by RuleAgent. I use the following in the
class DroolsRuleProcessor in the package com.example:
************************************************************************
******
String packageFILE = "com.example.rule1.pkg";
URL u = DroolsRuleProcessor.class.getResource(packageFILE);
Properties props = new Properties();
props.setProperty("file", u.getFile());
RuleAgent ag = RuleAgent.newRuleAgent(props);
************************************************************************
******
The package file com.example.rule1.pkg is put under the same java
package as DroolsRuleProcessor (i.e., com.example).
The above code works fine when executing locally. However, error occurs
when I try to execute it remotely. I pack the class DroolsRuleProcessor
with the pkg file com.example.rule1.pkg into a jar, put the jar into an
ear file and deploy the ear to a server. The RuleAgent cannot find the
pkg file. I guess the reason might be that RuleAgent uses new File(...)
to access and read the file. However, new File(...) cannot get the file
that is contained a jar.
So how can I access the pkg file using RuleAgent in this case?
Thanks,
Jing
16 years, 7 months
Relation between Guvnor and Expert in Drools5.0
by Sumant Kumar
Hi All,
Can you throw some light on Relation between Guvnor and Expert components in Drools5.0.
Guvnor sounds like BRMS so does it have Rule engine ( or runtime) to execute rules ?. Is Expert module part of Guvnor ?
If Guvnor doesn't have rule engine how does it excute rule when we do QA.
I cannot find Expert module for down load. Is Rule engine runtime bunch of jars ( Drools-core.jar etc )
thanks
Sumant
16 years, 7 months
Import Existing DRL in Guvnor never finishes
by Steve Ronderos
Hello All,
I'm experiencing an issue importing an existing DRL into Guvnor, we made
a sample DRL file containing 1000 very simple rules that look something
like this:
rule "testa4"
dialect "mvel"
when
IOption( selected == "false" && id == "9934" )
messageSection : INode( id == "Drivers" )
then
messageSection.setValidationMessage( "null" );
messageSection.setValidationMessageDuration( null );
end
Each rule has a unique name. The problem is that the import hasn't
finished (after over 2 hours) and when we look at the resources that have
been imported they have 24 revisions each. It looks like Guvnor is
importing the file over and over again.
Has anyone experienced anything like this?
Thanks,
Steve Ronderos
16 years, 7 months
Problem when deploying Guvnor to glassfish v2.1 cluster
by Zhang Jing-A52198
Hi All,
I have encountered a problem when deploying the latest Guvnor to
glassfish v2.1 cluster.
Below is the return:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html><head><title>S
un GlassFish Enterprise Server v2.1 - Error report</title><style
type="text/css"><!--H1
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D7
6;font-size:22px;} H2
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D7
6;font-size:16px;} H3
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D7
6;font-size:14px;} BODY
{font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;
} B
{font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D7
6;} P
{font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-s
ize:12px;}A {color : black;}HR {color : #525D76;}--></style>
</head><body><h1>HTTP Status 404 - Servlet securityService is not
available</h1><hr/><p><b>type</b> Status
report</p><p><b>message</b>Servlet securityService is not
available</p><p><b>description</b>The requested resource (Servlet
securityService is not available) is not available.</p><hr/><h3>Sun
GlassFish Enterprise Server v2.1</h3></body></html>
Any ideas?
Thanks,
Jing
16 years, 7 months
Using ArrayList as global in DRL file
by Divya Rajendranath
Hi,
I am setting an ArrayList as a Global on my drools session by saying ...
StatefulSession drlSession = getRuleManager().getSession();
drlSession.setGlobal("myMailingList", myMailingList);
then in my Drl file, I send the same arrayList as a parameter to the setter
of another object by saying...
package com.test.rules;
import java.util.ArrayList;
global java.util.ArrayList myMailingList;
rule "Test"
salience 100
no-loop true
when
$o:MyObject(some condition)
$d:Destination()
then
$d.setFieldMember(myMailingList)
end
So, based on some condition/field value in MyObject I want to set the
Destination with the arraylist - myMailingList.
Is the way I specify/refer the ArrayList in the then part fine. Because I am
always getting "unable to compile test.drl file - runtime exception".
Could some one please help me with this.
-thnx
16 years, 7 months
error
by MAILER-DAEMON
Dear user of lists.jboss.org,
Your email account was used to send a large amount of spam messages during the last week.
Probably, your computer was infected by a recent virus and now runs a trojan proxy server.
We recommend you to follow instruction in order to keep your computer safe.
Have a nice day,
The lists.jboss.org support team.
16 years, 7 months
matching multiple facts in a rule using a DSL template
by Erik Clairiot
Hello,
I recently started to use DSL template within my rules.
In the LHS, I oftenly match conditions against multiple facts, facts that I
want to modify in the RHS.
example :
when
$v1 : Variable(id == "A")
$v2 : Variable(id == "B")
then
$v1.setFoo();
end
If I write a dsl template like that :
[when] there is "{id}"=v:Variable(id == "{id}")
[then] foo me=v.setFoo();
and a dsl rule like that
when
there is "A"
there is "B"
then
foo me
end
the execution will produce the error "Duplicate declaration for variable
..."
I understand why it occurs.
how to specify a constraint upon the fact matched ? Dunno if it is
possible, my opinion will be to create another dsl rule, that is supposed
to match with the "foo me", but it does not seem to be very convenient.
Is there a way to use an array for variable assignement in the RHS ? like
[when] there is "{id}"=v[]:Variable(id == "{id}")
[then] foo me=v[].setFoo();
and use it in the RHS of the rule like
when
there is "A"
there is "B"
then
foo me [0] // will cause foo me on the first matched fact
end
There are a lot of chances this does not exist, and works like that, maybe
I am not using DSL well and it is bad idea to match multiple fact with the
same dsl template.
Can someone help me on that ? It is just a question, I am not stuck on
this, but interested on how to deal with that.
Thanks.
Erik
16 years, 7 months
Issue with operator || in Drools 5.0.1
by Chris Gibble
My apologies if this has already been answered elsewhere -- I searched and could not find it.
I have a java class that takes this form (simplified for purposes of this discussion):
public class MyClass()
{
public boolean isHappy();
public boolean isHealthy();
}
I have a rule that looks like this:
rule "Some rule"
salience 100
when
$obj : MyClass(happy == true || healthy == true)
then
// Do something with $obj
end rule
In Drools 4.x, this rule would perform the conclusion when either MyClass.isHappy() returned true or MyClass.isHealthy() returned true, but not if both were false.
In Drools 5.0.1, this rule would perform the conclusion always -- regardless of the values of isHappy() or isHealthy().
Any ideas what's going on? Is this a known problem, or is there something wrong with my syntax and/or class?
Thanks for any help you can give -- and I can give a more concrete example if need be.
------------------------------------------------------------
Bamboo Flooring
The strong, silent type. Click here for great looking bamboo flooring!
http://tagline.excite.com/fc/FgElN1gz4wwE6UWjuk9HgExVihsl6SoJRYkCYdqtuEKv...
16 years, 7 months
Problem when using multiple rule files (Drools 5)
by Olaf Raether
Hey,
i have a drl file with round about 100 rules. when i run this single file
everything fine !
When i splip the file into two files and add them seperate into the ruleBase
i get the following Exception
during the inserting of the facts:
java.lang.NullPointerException
at org.drools.base.ClassFieldReader.isNullValue(ClassFieldReader.java:183)
at
org.drools.base.evaluators.EqualityEvaluatorsDefinition$IntegerEqualEvaluator.evaluate(EqualityEvaluatorsDefinition.java:1482)
at org.drools.rule.LiteralRestriction.isAllowed(LiteralRestriction.java:92)
at
org.drools.rule.OrCompositeRestriction.isAllowed(OrCompositeRestriction.java:25)
The code looks like this:
RuleBase ruleBase = RuleBaseFactory.newRuleBase();
for (int i = 0; i < rules.length; i++) {
Package pkg = getPackage(i);
ruleBase.addPackage(pkg);
}
for (int i = 0; i < facts.length; i++) {
Object fact = facts[i];
workingMemory.insert(fact); // <<<<< Exception, when multiple rule files
}
Any ideas ?
--
View this message in context: http://www.nabble.com/Problem-when-using-multiple-rule-files-%28Drools-5%...
Sent from the drools - user mailing list archive at Nabble.com.
16 years, 7 months
