Bug 1028396

Summary:	Switching to Rete View causes an eror "Unable to parse rules to show RETE view! 2 build errors"
Product:	[JBoss] JBoss Fuse Service Works 6	Reporter:	Jochen Cordes <jcordes>
Component:	Rules / jBPM integration	Assignee:	Rob Cernich <rcernich>
Status:	ON_QA ---	QA Contact:	Matej Melko <mmelko>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	6.0.0	CC:	atangrin, ldimaggi, serviceworks, soa-p-jira, tschan+redhat, vidhuran2012
Target Milestone:	DR1
Target Release:	6.1.0
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	If you open a .drl rule file and try to switch to the Rete review, you will encounter an error. As a result, users cannot see the Rete tree view.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Jochen Cordes 2013-11-08 11:05:47 UTC

Description of problem:


Version-Release number of selected component (if applicable):

JBDS 7.0.1 GA
JBoss Tooling (https://devstudio.jboss.com/updates/7.0-development/integration-stack/, includes JBoss Drools Core 6.0.0.201308222359)

How reproducible:

Always

Steps to Reproduce:
1. Create a rule service following the documentation at https://access.redhat.com/site/documentation/en-US/Red_Hat_JBoss_Fuse_Service_Works/6/html-single/Development_Guide_Volume_1_SwitchYard/index.html#Create_a_Rules_Service
2. Open the file RulesComponent.drl file
3. Switch to Rete Tree

The (default) RulesComponent.drl file looks like this:

package com.example.switchyard.switchyard_rules
import org.switchyard.Message
global Message message

rule "RulesComponent"
    when
        // insert conditional here
    then
        // insert consequence here
        System.out.println("service: RuleService, payload: " + message.getContent());
end

Actual results:

Error shown

Expected results:

Rete Tree view should be shown

Additional info:

Eclipse error log (Help -> About JBoss Developer Studio -> Configuration Details -> Show Error Log)

!ENTRY org.drools.eclipse 4 120 2013-11-08 10:27:30.204
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.Exception: 2 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:147)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

!ENTRY org.drools.eclipse 4 120 2013-11-08 10:27:30.204
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.Exception: Unable to parse rules to show RETE view! 2 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:162)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

!ENTRY org.drools.eclipse 4 120 2013-11-08 10:27:30.236
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.reflect.InvocationTargetException
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:248)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Caused by: java.lang.Exception: Unable to parse rules to show RETE view! 2 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:162)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	... 1 more
Root exception:
java.lang.Exception: Unable to parse rules to show RETE view! 2 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:162)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)


After changing rule to

package com.example.switchyard.switchyard_rules
import org.switchyard.Message

rule "RulesComponent"
    when
        message : Message()
    then
        // insert consequence here
        System.out.println("service: RuleService, payload: " + message.getContent());
end


!ENTRY org.drools.eclipse 4 120 2013-11-08 11:21:31.415
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.Exception: 3 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:147)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

!ENTRY org.drools.eclipse 4 120 2013-11-08 11:21:31.415
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.Exception: Unable to parse rules to show RETE view! 3 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:162)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

!ENTRY org.drools.eclipse 4 120 2013-11-08 11:21:31.420
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.reflect.InvocationTargetException
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:248)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Caused by: java.lang.Exception: Unable to parse rules to show RETE view! 3 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:162)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	... 1 more
Root exception:
java.lang.Exception: Unable to parse rules to show RETE view! 3 build errors
	at org.drools.eclipse.editors.rete.ReteViewer.loadReteModel(ReteViewer.java:162)
	at org.drools.eclipse.editors.DRLRuleEditor2$3.run(DRLRuleEditor2.java:240)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)


When upgrading "Drools and jBPM tools" to 6.0.0.CR5 (downloaded from http://www.jboss.org/drools/downloads) it started to work

So we have two issues:

- First the version of Drools tools need to be updated
- Second the generated example for Drools in SY should be updated

Comment 2 Rob Cernich 2013-11-08 14:25:41 UTC

Changing the component as this sounds like a Drools issue, not a SY issue.

I'll investigate the template used when creating a rule, but I'm guessing we actually need the "message" global.

Comment 3 Anne-Louise Tangring 2014-06-19 18:45:04 UTC

It is possible this is fixed in the latest JBDSIS release (7.0.2)