[rules-users] drools-example-brms
Shahad Ahmed
shahad.ahmed2 at gmail.com
Fri Aug 3 19:58:34 EDT 2007
Fernando,
Thanks for the update. I downloaded and tried the updated zip on the
downloads page and the serialVersionUID issue is fixed. There is still one
problem with the example. When you run the example (following all the
instructions) I get a ClassNotFoundException:
org.drools.rule.builder.dialect.mvel.MVELDialect$ModifyInterceptor (see
stack below). I think the example needs to include the
drools-compiler-4.0.0.jar in the eclipse project classpath as I suggested in
my original post.
Regards
Shahad
RuleAgent(insuranceconfig) EXCEPTION (Sat Aug 04 00:42:54 BST 2007):
org.drools.rule.builder.dialect.mvel.MVELDialect$ModifyInterceptor. Stack
trace should follow.
java.lang.ClassNotFoundException:
org.drools.rule.builder.dialect.mvel.MVELDialect$ModifyInterceptor
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at java.io.ObjectInputStream.resolveClass(Unknown Source)
at org.drools.common.DroolsObjectInputStream.resolveClass(
DroolsObjectInputStream.java:74)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at java.util.HashMap.readObject(Unknown Source)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at java.util.HashMap.readObject(Unknown Source)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.drools.rule.Package.readExternal(Package.java:184)
at java.io.ObjectInputStream.readExternalData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.drools.agent.HttpClientImpl.fetchPackage(HttpClientImpl.java:54)
at org.drools.agent.URLScanner.readPackage(URLScanner.java:137)
at org.drools.agent.URLScanner.getChangeSet(URLScanner.java:109)
at org.drools.agent.URLScanner.loadPackageChanges(URLScanner.java:88)
at org.drools.agent.RuleAgent.checkForChanges(RuleAgent.java:297)
at org.drools.agent.RuleAgent.refreshRuleBase(RuleAgent.java:265)
at org.drools.agent.RuleAgent.configure(RuleAgent.java:251)
at org.drools.agent.RuleAgent.init(RuleAgent.java:183)
at org.drools.agent.RuleAgent.newRuleAgent(RuleAgent.java:192)
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)
RuleAgent(insuranceconfig) WARNING (Sat Aug 04 00:42:54 BST 2007): Was
unable to load a class when loading a package. Perhaps it is missing from
this application.
On 7/31/07, Fernando Meyer <fmcamargo at gmail.com> wrote:
>
> Shahad,
>
> I've updated drools-example-brms in both trunk and latest GA tag, I
> also updated the zip file in downloads page with latest drools and
>
>
> Fernando Meyer http://fmeyer.org
> fmcamargo at gmail.com
> PGP: 0xD804DDFB
>
>
> On 7/30/07, Shahad Ahmed < shahad.ahmed2 at gmail.com> wrote:
>
> > 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/lib
> > from 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
> > > 4.0.0 BRMS 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?
> > > > >> _______________________________________________
> > > > >> rules-users mailing list
> > > > >> rules-users at lists.jboss.org
> > > > >> https://lists.jboss.org/mailman/listinfo/rules-users
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > rules-users mailing list
> > > > > rules-users at lists.jboss.org
> > > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > > >
> > > > >
> > > >
> > > > --
> > > > View this message in context: http://www.nabble.com/drools-example-brms-tf4110522.html#a11702935
> > > >
> > > > Sent from the drools - user mailing list archive at Nabble.com<http://nabble.com/>
> > > > .
> > > >
> > > >
> > > > _______________________________________________
> > > > rules-users mailing list
> > > > rules-users at lists.jboss.org
> > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > >
> > >
> > > _______________________________________________
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> > > https://lists.jboss.org/mailman/listinfo/rules-users
> > >
> > >
> > >
> > >
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> > > https://lists.jboss.org/mailman/listinfo/rules-users
> > >
> > >
> >
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> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
>
>
> --
> Fernando Meyer
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
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