[rules-users] drools-example-brms
Shahad Ahmed
shahad.ahmed2 at gmail.com
Mon Jul 30 19:31:13 EDT 2007
Hi Fernando,
Removing the compiled package will help, but the problem that myself and the
other users have encountered also occurs with the RuleAgent url due to the
incorrect version of mvel (see the first part of my earlier post in this
thread). I suspect you will also need to update the mvel jar in the lib
directory in
http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-examples/drools-examples-brms/libfrom
mvel14-1.2pre5.jar to mvel14-1.2rc1.jar.
My main concern is that this problem is in the official 4.0 GA download
option "Drools 4.0.0 Examples", and consequently a lot of new users may have
problems getting the BRMS examples to work. As the examples are often the
first thing new users try, then it would be good to fix this and make the
fix available on the Drools download page, as well updating the trunk.
Regards
Shahad
On 7/30/07, Fernando Meyer <fmcamargo at gmail.com> wrote:
>
> Hi Shahad,
>
> You are right, the binary in resources directory is deprecated, But as you
> can see I'm using the RuleAgent url to access deployed stuff (
> http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-examples/drools-examples-brms/src/main/brmsdeployedrules.properties),
> I think for compatibility issues will be better remove the compiled package
> in resources dir.
>
>
> Thanks for your feedback
>
>
> Fernando Meyer http://fmeyer.org
> fmcamargo at gmail.com
> PGP: 0xD804DDFB
>
>
>
>
> On Jul 30, 2007, at 1:26 PM, Shahad Ahmed wrote:
>
> I had the same problem but managed to fix it.
>
> I think the problem is that the repository in the BRMS insurance example
> was built with an old version of the MVEL library (mvel14-1.2pre5.jar)
> which means that some the MVEL objects defined in the example repository (in
> file repository_export.xml) have an incorrect serialVersionUID values when
> they are accessed by the BRMS web-app, which uses a (newer?) version of MVEL
> mvel14-1.2rc1.jar.
>
> Here's how I got the example working:
>
> 1. I assume you've already loaded the example repository from
> repository_export.xml as described in Fernando's instructions for the BRMS
> example in the drools 4.0GA manual (section 9, which incidentally doesn't
> have a table of contents entry, so you have to scroll down to near the end
> of the manual). Click the Packages option on the left-hand side of the BRMS
> page. Select the org.acme.insurance package in the Explore tab. Click on
> "build, validate and deploy" for this package. Then click the "Build
> Package" button. This will build a new version of the example, but using the
> new MVEL library. If the build worked, another button will appear below the
> "Build Package" button called "create Snapshot for Deployment". Created a
> new snapshot and call it what you like.
>
> 2. Click the Deployment option on the left-hand-side of the BRMS window.
> Click on the Snapshot tab and then select the org.acme.insurance package.
> The new snapshot you created should be listed. Click the Open button beside
> it and copy the displayed Package URI into the
> brmsdeployedrules.properties file to replace the existing key called url –
> this is identical to the instructions in the manual. Save the file.
>
> 3. In the example eclipse project, remove the mvel14-1.2pre5.jar from the
> project's java build path libraries. Add in the following jars from the
> drools 4.0 GA binary distribution:
>
> mvel14-1.2rc1.jar
> drools-core-4.0.0.jar
> drools-compiler-4.0.0.jar
>
> Now run MainClass in the examples eclipse project. Hopefully, you will see
> the expected output.
>
> Note that the exported binary version of the insurance example found in
> resources/org.acme.insurance.pkg suffers from the same issue. To get that
> working as well you will need to create a new version of the file by
> selecting "download binary package" in step 1, after clicking "Build
> Package".
> Also note that you get the same problem if you use the "BRMS Drools 4.0.0BRMS Standalone" version that comes with Tomcat
> 5.5 on the download page. To fix that, find the folder
> drools-jbrms-1.0-standalone\shared\lib and then replace
> mvel14-1.0-SNAPSHOT.jar with the version of MVEL in the 4.0 GA binary dist
> - mvel14-1.2rc1.jar.
>
> Hope this helps.
>
> Shahad
>
>
> On 7/20/07, davidnm <davidnm at gmail.com> wrote:
> >
> >
> > I did it and i got the same, i forgot to say i´m running it on Tomcat
> > 5.5
> > could it be the problem?
> >
> > Thanks.
> >
> >
> >
> > Fernando Meyer Camargo wrote:
> > >
> > > use double \ in your config. file
> > >
> > > ex. D:\\workspace2\\drools-example-brms\\cache
> > >
> > >
> > >
> > > Fernando Meyer http://fmeyer.org
> > > fmcamargo at gmail.com
> > > PGP: 0xD804DDFB
> > >
> > >
> > >
> > > On Jul 19, 2007, at 9:31 AM, David Nogueras wrote:
> > >
> > >> Hi, I´m trying to run the brms sample and i get the next output:
> > >>
> > >> RuleAgent(insuranceconfig) INFO (Thu Jul 19 14:27:44 CEST 2007):
> > >> Configuring with newInstance=true, secondsToRefresh=30
> > >> RuleAgent(insuranceconfig) INFO (Thu Jul 19 14:27:44 CEST 2007):
> > >> Configuring package provider : URLScanner monitoring URLs: http://
> > >> localhost:8080/drools-jbrms/org.drools.brms.JBRMS/package/
> > >> org.acme.insurance/David2 with local cache dir of D:\workspace2
> > >> \drools-example-brms\cache
> > >> RuleAgent(insuranceconfig) WARNING (Thu Jul 19 14:27:44 CEST 2007):
> > >> Falling back to local cache.
> > >> java.lang.NullPointerException
> > >> at org.drools.agent.FileScanner.readPackage(FileScanner.java:101)
> > >> at org.drools.agent.FileScanner.getChangeSet (FileScanner.java
> > :79)
> > >> at org.drools.agent.FileScanner.loadPackageChanges
> > >> ( FileScanner.java:57)
> > >> at org.drools.agent.URLScanner.loadPackageChanges
> > >> (URLScanner.java:93)
> > >> at org.drools.agent.RuleAgent.checkForChanges (RuleAgent.java
> > :291)
> > >> at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:259)
> > >> at org.drools.agent.RuleAgent.configure(RuleAgent.java:228)
> > >> at org.drools.agent.RuleAgent.init(RuleAgent.java:160)
> > >> at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:169)
> > >> at org.acme.insurance.launcher.InsuranceBusiness.loadRuleBase
> > >> (InsuranceBusiness.java:26)
> > >> at org.acme.insurance.launcher.InsuranceBusiness.executeExample
> > >> (InsuranceBusiness.java:14)
> > >> at org.acme.insurance.launcher.MainClass.main(MainClass.java:13)
> > >>
> > >> could someone help me?
> > >> _______________________________________________
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> > >> https://lists.jboss.org/mailman/listinfo/rules-users
> > >
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> >
> > --
> > View this message in context: http://www.nabble.com/drools-example-brms-tf4110522.html#a11702935
> >
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> > .
> >
> >
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