Re: [rules-users] Drools 5.0.1 in eclipse having memory issue
by LokR
Hi,
Actually, I'm not sure about where the error comes from, so, I'll tell for
two possibilities:
1)Eclipse itself is making a OutOfMemoryError
2)when you run you application using rules, you have a outOfMemoryError
1)Eclipse itself is maling a OutOfMemoryError
-go in your eclipse installation folder
-open the file name eclipse.ini
-replace -Xmx512m by -Xmx1024m or whatever size should be appropriate
2) your application is doing it
-right click on a source file
-Run as
-Run configurations...
-Arguments
-in vm arguments, just put -Xmx1024m or whatever size should be appropriate
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16 years
Calling a rule within a rule
by Dinesh kumar
Hi All,
I am new to Drools and I need a help.
Is it possible to call a rule within a rule.
i.e., only when rule1 condition is true , my rule2 should execute
rule1
when a!=null
then
...
rule2
when a.toString() !=""
then
...
Though i can write both the conditions in the same rule, its not a feasible
solution as my business rules are much complicated. I am expecting to write
something like this..
rule1
when a!=null
then
when a.toString() !=""
then
...
end
end
But this is not working out. It would be great if someone can help me out..
Also I understood that variables cannot be declared in guvnor.. Is this
true..? If true then what is an alternative. Kindly help me
Regards,
Dinesh
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16 years
inline eval vs comparing booleans
by evertp
Hi
In the JBoss Rules 5.0 dev guide I read the statement:
When comparing inline eval with standard eval, we can see that they both
must
return true or false. However, inline eval must be a time-constant
expression.
It is evaluated only once and then it is cached by Drools
1. Can I assume that the caching lasts until the session is disposed of?
2. Is there a difference between the conditions Fact( eval(isValid) ) and
Fact( isValid == true ) or are they evaluated in the same way?
-Evert
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16 years
Error on Rule Parsing on JBOSS server
by ramram
Hi All,
I have the below rule that I am testing when using a Tomcat server errors
the application deploys fine and the rule fires with no errors on the other
hand when I tried to deploy the same war on JBOSS I had the following
exception can anyone help on this.
Exception (
ERROR [STDERR] [1,9]: [ERR 101] Line 1:9 no viable alternative
at input '.'
java.lang.IllegalArgumentException: Could not parse
knowledge.
at
com.fp.engine.RuleEngineDef.newStatefulKnowledgeSession(RuleEngineDef.java:49)
at
com.fp.engine.RuleEngineDef.getSession(RuleEngineDef.java:29)
)
#created on: May 12, 2010
package com.fp
#list any import classes here.
import com.fp.vo.StageLine;
rule "test revenue rule"
when
stgLine : StageLine ( ruleName == 'testRev' )
then
System.out.println("++++ RULE HIT ON NETSALES ++++");
end
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16 years
Problem with poi.apache.usermodel.hssf file
by Fnu Mahalakshmi
Hi,
I tried downloading the apache poi 3.6 files from the apache site but I could not find any .jar files which I could add.
I got all java files for hssf and I added it to my eclipse project as external reference>add external class folder.
But still it is not recognized and I get error when I try to do this:
import org.apache.poi.hssf.usermodel.HSSFCell;
I do not understand what to download or add to make it work?
Can someone please help!!
Thank you in advance.
Mahalakshmi
</pre>
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16 years
reading brl files in eclipse
by Fnu Mahalakshmi
Hi,
How can we read .brl files in eclipse (when I import a business rule to eclipse)?
How can I create a guided rule in eclipse? I am unable to use the facts in my project like it appears with the guvnor editor?
Please help ..
Thank you.
</pre>
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16 years
Problem uploading project in eclipse
by Fnu Mahalakshmi
Hi,
I have created my rules and test scenarios as per the drools tutorial & guide.
But I am having trouble uploading that project into my Eclipse IDE.
I just selected upload from Guvnor Repository and I can then only select certain files.
Again the .brl files do not open in eclipse.
how I can test my sample dataset (contained in an excel file) in the drools guvnor itself without uploading the whole project in eclipse?
Or do I need to write all the rules from a scratch in eclipse again for it to work? Then whats the whole point of using the guvnor guided editor??
Please help me out. Am new to drools.
Thank you.
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16 years
