[rules-users] Re: Problems in Guvnor 5.0M4 with imported 4.0.7 repositories that use ruleflows

[Mark Proctor]

Shahad Ahmed wrote:
> Okay, I've figured this out. There is a bug in the Guvnor that means 
> it cannot open or perform operations on version 4 ruleflow assets in 
> an v4 repository that was migrated to version 5 by the Guvnor. I've 
> raised this as a JIRA  JBRULES-1945 and attached a patch to the JIRA. 
> The patch also allows you to open, view and edit version 4 .rf 
> (graphical) ruleflow files using the V5 Eclipse plugin, and also open 
> v4 .rfm assets in the Guvnor. One of the classes in the patch 
> (RuleFlowMigrator) can also be used as a command line application to 
> migrate version 4 .rf files to version 5 if required.
I know kris added a patch to load v4 rulelfows, but I guess guvnor isn't 
aware of the properties switch that needs to be applied. We'll review 
your patch asap.

Thanks

Mark
>
> Regards
> Shahad
>
>
> On Mon, Jan 12, 2009 at 11:10 AM, Shahad Ahmed 
> <shahad.ahmed2 at gmail.com <mailto:shahad.ahmed2 at gmail.com>> wrote:
>
>     Does anyone know if there is a way of specifying that the Guvnor
>     5.0M4 should migrate ruleflows from version 4.0 to 5.0 when
>     importing a version 4.0 repository into the Guvnor, or is this
>     bug/oversight in the Guvnor?
>
>     I'm trying to import a drools 4.0.7 repository into Guvnor 5.0M4 –
>     the repository was originally exported out of a drools 4.0.7 BRMS
>     (i.e. in XML format). However, when I try and build a package
>     containing a ruleflow in the imported repository it fails, but the
>     same repository builds under the drools 4.0.7 BRMS. Packages
>     without ruleflows build okay, so it looks as if the failure has to
>     do with the ruleflows in packages.
>
>     I know that drools 4 ruleflows are not compatible with drools 5
>     ruleflows, and that there's a drools property that allows the
>     compiler to automatically migrate ruleflows from 4.0 to 5.0. I had
>     assumed the Guvnor applies this migration as I see the following
>     in the log when I import the repository, but a quick look at code
>     in the drools trunk suggests that this migration simply changes
>     version numbers in the repository, but does not migrate the ruleflows:
>
>     17:27:59,931 INFO  [STDOUT] AUTO MIGRATION: Performing
>     drools.package migration.
>     17:28:00,369 INFO  [STDOUT] AUTO MIGRATION: drools.package
>     migration completed.
>
>     The reason I suspect it's something to do with ruleflows is that
>     when I try and do anything with the ruleflow assets in the Guvnor,
>     I see the following error:
>
>     17:30:40,634 INFO  [STDOUT] (null: 1, 59): cvc-elt.1: Cannot find
>     the declaratio
>     n of element 'org.drools.ruleflow.core.impl.RuleFlowProcessImpl'.
>
>     When I try and build a package with a ruleflow I see the following
>     error in the log:
>
>     Caused by: java.lang.NullPointerException
>             at
>     org.drools.compiler.ProcessBuilder.buildProcess(ProcessBuilder.java:9
>     9)
>             at
>     org.drools.compiler.ProcessBuilder.addProcessFromFile(ProcessBuilder.
>     java:228)
>             at
>     org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.j
>     ava:435)
>             at
>     org.drools.compiler.PackageBuilder.addRuleFlow(PackageBuilder.java:40
>     7)
>             at
>     org.drools.guvnor.server.contenthandler.RuleFlowHandler.compile(RuleF
>     lowHandler.java:108)
>             at
>     org.drools.guvnor.server.builder.ContentPackageAssembler.buildAsset(C
>     ontentPackageAssembler.java:167)
>             at
>     org.drools.guvnor.server.builder.ContentPackageAssembler.buildPackage
>     (ContentPackageAssembler.java:154)
>             at
>     org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(Conte
>     ntPackageAssembler.java:103)
>             at
>     org.drools.guvnor.server.builder.ContentPackageAssembler.<init>(Conte
>     ntPackageAssembler.java:116)
>             at
>     org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceIm
>     plementation.java:1370)
>             at
>     org.drools.guvnor.server.ServiceImplementation.buildPackage(ServiceIm
>     plementation.java:1354) 
>
>     Regards
>     Shahad
>
>
> ------------------------------------------------------------------------
>
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