How does kie-spring find and incorporate DRL files (packages) into a kie:kbase bean?
Ken Siprell
How does kie-spring find and incorporate DRL files (packages) into a kie:kbase bean?
I understand the convention with kmodule.xml and src/main/resources/path/to/drl/files, which I’ve gotten to work without any trouble. Does kie:spring do a similar scan automatically?
If the questions don’t make sense, here’s the background.
I’m trying to integrate kie-spring into two Grails plugins (https://github.com/kensiprell/grails-drools, https://github.com/kensiprell/grails3-drools). Grails is a web application framework based on Spring, and Grails 3 (milestone release only) is based on Spring Boot, so kie-spring seemed like a good fit. I’m a hobby developer, and my limited Drools experience began about two months ago when I started working on the first plugin.
The plugins work except that I cannot get the kbase beans to recognize the rule packages; they’re always null. I’ve gone through the Drools documentation and a couple of books, and I’m sure I’m missing something simple. Unfortunately, almost all of the Spring examples I’ve seen on GitHub aren’t using kie-spring.
The Drools Spring documentation (chapter 11) led me to believe that all I needed to do is to import the beans (example config below) and have the DRL files on the classpath, which I do with a Gradle task (https://github.com/kensiprell/grails3-drools/blob/master/buildSrc/src/main/groovy/grails/plugin/drools/DroolsGradlePlugin.groovy#L14-L47). The beans all seem to be working fine except for the lack of rules associated with the kbase beans.
<?xml version='1.0' encoding='utf-8'?>
<beans xmlns='http://www.springframework.org/schema/beans' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:kie='http://drools.org/schema/kie-spring' xsi:schemaLocation='http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://drools.org/schema/kie-spring http://drools.org/schema/kie-spring.xsd'>
<kie:kmodule id='defaultKieModule'>
<kie:kbase name='applicationKieBase' default='false' packages='rules.application'>
<kie:ksession name='applicationStatefulSession' default='false' type='stateful' />
<kie:ksession name='applicationStatelessSession' default='false' type='stateless' />
</kie:kbase>
<kie:kbase name='ticketKieBase' default='false' packages='rules.ticket'>
<kie:ksession name='ticketStatefulSession' default='false' type='stateful' />
<kie:ksession name='ticketStatelessSession' default='false' type='stateless' />
</kie:kbase>
</kie:kmodule>
<bean id='kiePostProcessor' class='org.kie.spring.KModuleBeanFactoryPostProcessor' />
</beans>
Although my current project’s state isn’t reflected in the repo, I tried moving my rules source directory to /src/main/resources/ and also added the proper package name to the DRL files, but that didn’t help. This repo (https://github.com/vinodkiran/kie-springmvc) looks like a good match, but it hasn’t helped me either. It doesn’t look like he’s doing anything special to associate the rules packages with his kbase bean.
The only thing that stands out to me is that my Drools beans are imported (https://github.com/kensiprell/grails3-drools/blob/master/src/main/groovy/grails/plugin/drools/DroolsGrailsPlugin.groovy#L30) late in the application startup cycle.
Thanks for any tips!
Ken
Vinod Kiran
Ken Siprell
On 12.03.2015, at 23:19, Vinod Kiran <vinod...@gmail.com> wrote:
kie-spring does not do anything special, it is but a thin layer on kmodule.xml. The scanning is done by the same manner as kmodule.xmlCan you double check if the DRLs are available src/main/resources/rules/application, src/main/resources/rules/ticket ?
On Thursday, March 12, 2015 at 7:13:15 AM UTC-5, Ken Siprell wrote:
How does kie-spring find and incorporate DRL files (packages) into a kie:kbase bean?
I understand the convention with kmodule.xml and src/main/resources/path/to/drl/files, which I’ve gotten to work without any trouble. Does kie:spring do a similar scan automatically?
If the questions don’t make sense, here’s the background.
I’m trying to integrate kie-spring into two Grails plugins (https://github.com/kensiprell/grails-drools,https://github.com/kensiprell/grails3-drools). Grails is a web application framework based on Spring, and Grails 3 (milestone release only) is based on Spring Boot, so kie-spring seemed like a good fit. I’m a hobby developer, and my limited Drools experience began about two months ago when I started working on the first plugin.
The plugins work except that I cannot get the kbase beans to recognize the rule packages; they’re always null. I’ve gone through the Drools documentation and a couple of books, and I’m sure I’m missing something simple. Unfortunately, almost all of the Spring examples I’ve seen on GitHub aren’t using kie-spring.
The Drools Spring documentation (chapter 11) led me to believe that all I needed to do is to import the beans (example config below) and have the DRL files on the classpath, which I do with a Gradle task (https://github.com/kensiprell/grails3-drools/blob/master/buildSrc/src/main/groovy/grails/plugin/drools/DroolsGradlePlugin.groovy#L14-L47). The beans all seem to be working fine except for the lack of rules associated with the kbase beans.
<?xml version='1.0' encoding='utf-8'?>
<beans xmlns='http://www.springframework.org/schema/beans'xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'xmlns:kie='http://drools.org/schema/kie-spring' xsi:schemaLocation='http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://drools.org/schema/kie-springhttp://drools.org/schema/kie-spring.xsd'>
<kie:kmodule id='defaultKieModule'>
<kie:kbase name='applicationKieBase' default='false'packages='rules.application'>
<kie:ksession name='applicationStatefulSession' default='false'type='stateful' />
<kie:ksession name='applicationStatelessSession' default='false'type='stateless' />
</kie:kbase>
<kie:kbase name='ticketKieBase' default='false' packages='rules.ticket'>
<kie:ksession name='ticketStatefulSession' default='false'type='stateful' />
<kie:ksession name='ticketStatelessSession' default='false'type='stateless' />
</kie:kbase>
</kie:kmodule>
<bean id='kiePostProcessor' class='org.kie.spring.KModuleBeanFactoryPostProcessor' />
</beans>
Although my current project’s state isn’t reflected in the repo, I tried moving my rules source directory to /src/main/resources/ and also added the proper package name to the DRL files, but that didn’t help. This repo (https://github.com/vinodkiran/kie-springmvc) looks like a good match, but it hasn’t helped me either. It doesn’t look like he’s doing anything special to associate the rules packages with his kbase bean.
The only thing that stands out to me is that my Drools beans are imported (https://github.com/kensiprell/grails3-drools/blob/master/src/main/groovy/grails/plugin/drools/DroolsGrailsPlugin.groovy#L30) late in the application startup cycle.
Thanks for any tips!
Ken
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