[rules-users] Rules in App Server Error

[John McKim]

First off, yes, I am an expert Java programmer, not just a Drools expert - yet.  If you took the time to read the post, you would have found that the answer that was provided to me “DIDN’T WORK”.  Never mind, I’ll figure it out myself.  Goodby!  

 

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Greg Barton
Sent: Friday, December 03, 2010 7:26 PM
To: Rules Users List
Subject: Re: [rules-users] Rules in App Server Error

 

You made the same error in three other places.  Fix them.  Are you familiar with the java language?

GreG


On Dec 3, 2010, at 15:15, "John McKim" <jmckim at comcast.net> wrote:

Thanks for the reply Mauricio.  I tried what you said using this modified rule:

 

rule "medicalHistoryBleedingRiskFactors.gastritis rule"

salience 20

    when

        # find patients who indicated that they have MedicalHistoryBleedingRiskFactors: gastritis

        $patient : Patient(medicalHistoryBleedingRiskFactors.gastritis > 0)

    then

        String severity = $patient.medicalHistoryBleedingRiskFactors.gastritis; 

        $weight = 5;

        $factor = .1;

        $tempScore = $factor;

        $tempScore = $tempScore * $weight;

        $tempScore = $tempScore * $severity;

        # Now add this risk score to the accumlated risk score

        $patient.score = $patient.score + $tempScore;

        $patient.problem = new String("MedicalHistoryBleedingRiskFactors.gastritis");

end

 

But I got this exception in the client (I am using 5.1.1 by the way):

 

Exception in thread "Thread-4" java.lang.RuntimeException: Unable to build expression for 'consequence': [Error: Failed to compile: 1 compilation error(s): 

 - (1,9) unqualified type in strict mode for: $severity]

[Near : {... Unknown ....}]

             ^

[Line: 1, Column: 0] '        String severity = $patient.medicalHistoryBleedingRiskFactors.gastritis; 

        $weight = 5;

        $factor = .1;

        $tempScore = $factor;

        $tempScore = $tempScore * $weight;

        $tempScore = $tempScore * $severity;

        // Now add this risk score to the accumlated risk score

        $patient.score = $patient.score + $tempScore;

        $patient.problem = new String("MedicalHistoryBleedingRiskFactors.gastritis");

' : [Rule name='medicalHistoryBleedingRiskFactors.gastritis rule']

 

        at com.kai.framework.plugins.ruleengine.LocalRuleEnginePlugin.createLevel1KnowledgeBase(LocalRuleEnginePlugin.java:107)

        at com.kai.framework.plugins.ruleengine.LocalRuleEnginePlugin.access$100(LocalRuleEnginePlugin.java:22)

        at com.kai.framework.plugins.ruleengine.LocalRuleEnginePlugin$InitializeRuleEngine.run(LocalRuleEnginePlugin.java:192)

 

When I took out the String severity and used just $severity:  it works fine.  Just on the App server does it fail.

 

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Mauricio Salatino
Sent: Friday, December 03, 2010 3:36 PM
To: Rules Users List
Subject: Re: [rules-users] Rules in App Server Error

 

that's weird.. you are using a varible that you never define in the Right Hand Side.
$severity was never defined. In the RHS remember that you can write pure java. So if you want a variable called severity you should declare it as:
String severity = $patient.

medicalHistoryBleedingRiskFactors.gastritis; 

Greetings.

 

2010/12/3 John McKim <jmckim at comcast.net>

I'm having a problem that I can't seem to figure out.  I have rules that run in a client program with no problem - about 125 rules in all.  When I try to run these same rules in an App Server (GlassFish) I get several rules (about 5) that have an error on initialization.  Here is the error message followed by the rule. 

******************************************* 
SEVERE: java.lang.RuntimeException: Unable to build expression for 'consequence': [Error: not a statement, or badly formed structure] 
[Near : {... $severity; 
                   ....}] 
                     ^ 
[Line: 1, Column: 233] '        $severity = $patient.medicalHistoryBleedingRiskFactors.gastritis; 
        $weight = 5; 
        $factor = .1; 
        $tempScore = $factor; 
        $tempScore = $tempScore * $weight; 
        $tempScore = $tempScore * $severity; 
        // Now add this risk score to the accumlated risk score 
        $patient.score = $patient.score + $tempScore; 
        $patient.problem = new String("MedicalHistoryBleedingRiskFactors.gastritis"); 
' : [Rule name='medicalHistoryBleedingRiskFactors.gastritis rule'] 
********************************************** 
rule "medicalHistoryBleedingRiskFactors.gastritis rule" 
salience 20 
    when 
        # find patients who indicated that they have MedicalHistoryBleedingRiskFactors: gastritis 
        $patient : Patient(medicalHistoryBleedingRiskFactors.gastritis > 0) 
    then 
        $severity = $patient.medicalHistoryBleedingRiskFactors.gastritis; 
        $weight = 5; 
        $factor = .1; 
        $tempScore = $factor; 
        $tempScore = $tempScore * $weight; 
        $tempScore = $tempScore * $severity; 
        # Now add this risk score to the accumlated risk score 
        $patient.score = $patient.score + $tempScore; 
        $patient.problem = new String("MedicalHistoryBleedingRiskFactors.gastritis"); 
end 

As I said, this rule runs fine in a client app – when I run the same rules in app server I get an error.  This is only happening in 5 out of 125 rules, and only during initialization using builder.add(ResourceFactory.newClassPathResource(file).
Thanks.

 


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