[esb-issues] [JBoss JIRA] Created: (JBESB-1504) CBR using rules has poor performance

[Martin Vecera (JIRA)]

CBR using rules has poor performance
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                 Key: JBESB-1504
                 URL: http://jira.jboss.com/jira/browse/JBESB-1504
             Project: JBoss ESB
          Issue Type: Bug
      Security Level: Public (Everyone can see)
          Components: Content Based Routing
    Affects Versions: 4.2.1
         Environment: SOA-P 4.2.0.beta1
            Reporter: Martin Vecera


We have a simple performance that uses ContentBasedRouter to route XML messages:
<action class="org.jboss.soa.esb.actions.ContentBasedRouter" name="ContentBasedRouter">
               <property name="ruleSet" value="MyESBRules-XPath.drl"/>
               <property name="ruleLanguage" value="XPathLanguage.dsl"/>
               <property name="ruleReload" value="true"/>
               <property name="destinations">
                  <route-to destination-name="regular1" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular2" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular3" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular4" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular5" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular6" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular7" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular8" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular9" service-category="wiretapCategory1" service-name="regularService"/>
                  <route-to destination-name="regular0" service-category="wiretapCategory1" service-name="catchService"/>
               </property>
            </action>

 I have created a rule set of 100 rules. Like this:
package com.jboss.soa.esb.routing.cbr

import org.jboss.soa.esb.message.Message;
import org.jboss.soa.esb.message.format.MessageType;

expander XPathLanguage.dsl

global java.util.List destinations;

rule "ProductId1"
	salience 100
	when
		xpathEquals "/Order/OrderLines/OrderLine/Product/@productId", "1"
	then
		Destination : "regular1";
end
...
rule "ProductId299"
	salience 100
	when
		xpathEquals "/Order/OrderLines/OrderLine/Product/@productId", "299"
	then
		Destination : "regular0";
end

rule "Default rule"
	salience 1
	when
	then
		Destination : "regular0";
end

See https://svn.corp.jboss.com/repos/soa/trunk/qa/tests/quickstarts/performance8/MyESBRules-XPath.drl for the whole file.

The performance is very poor (see SOA-240 for reports). Only a tens of messages per second.

What's the problem here? Is the Rules engine really so slow? Or is it parsing the file every time a message arrives?

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