Bug 769587
| Summary: | drools modify command mvel exception | ||||||
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| Product: | [JBoss] JBoss Enterprise BRMS Platform 5 | Reporter: | Radovan Synek <rsynek> | ||||
| Component: | BRE (Expert, Fusion) | Assignee: | Mario Fusco <mfusco> | ||||
| Status: | VERIFIED --- | QA Contact: | |||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | BRMS 5.3.0.GA | CC: | mproctor, rzhang | ||||
| Target Milestone: | ER7 | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: |
When trying to execute the MVEL modify command on a stateful session an exception occurs (unable to resolve method). This was caused by a omission in the following line: sbuilder.append( setter.getAccessor() + " = " + setter.getValue() + "\n" ); which should have been: sbuilder.append( setter.getAccessor() + " = '" + setter.getValue() + "'\n" );. The error has been corrected and the issue no longer occurs.
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Story Points: | --- | ||||
| Clone Of: | Environment: | ||||||
| Last Closed: | Type: | --- | |||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
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Mario Fusco <mario.fusco> updated the status of jira JBRULES-3377 to Resolved Please verify the issue on 5.3 ER4. Problem still occurs, the same exception. Pull request with reproducer: https://github.com/droolsjbpm/drools/pull/104 The fix has been backported to the 5.3.x by upgrading the mvel version in use. Comment 7 suggests that this has been fixed a while ago. Moving to ON_QA. Looks like this issue is resolved on master (mvel2-2.1.0.drools10.jar), but not on 5.3.x (mvel2-2.1.0.drools8.jar) I upgraded the mvel version used also by the 5.3.x, so this issue should be fixed also there. Update status to ON_QA. Please verify them against ER6. I have tried on ER6 and there is the same exception. I am not so sure that problem is with MVEL version; the test case provided in pull request (see comment 6) works on master but fails on 5.3.x for me - although both branches use the same MVEL version. Also I have found a difference between these two branches in method org.drools.command.runtime.rule.ModifyCommand.getMvelExpr() - which is on the exception stack trace. master line 115: sbuilder.append( setter.getAccessor() + " = '" + setter.getValue() + "'\n" ); 5.3.x: line 115: sbuilder.append( setter.getAccessor() + " = " + setter.getValue() + "\n" ); The difference is missing "'" sign on 5.3.x. Isn't it possible that this is the problem? Mario Fusco <mario.fusco> made a comment on jira JBRULES-3377 Indeed I flagged 5.4.0.CR1 as the fix version for this issue, not the 5.3 I just backported the fix to the 5.3 This fix has been committed to project branch which BRMS 5.3 used. So this requires to request block+ flag or revert in the branch at current phase. The fixed for this issue should be included in ER7. Please do verification on it.
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New Contents:
When trying to execute the MVEL modify command on a stateful session an exception occurs (unable to resolve method). This was caused by a omission in the following line: sbuilder.append( setter.getAccessor() + " = " + setter.getValue() + "\n" ); which should have been: sbuilder.append( setter.getAccessor() + " = '" + setter.getValue() + "'\n" );. The error has been corrected and the issue no longer occurs.
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Created attachment 549016 [details] modify command reproducer - maven project Following exception occurs when trying to execute modify command on stateful session: { with (this) { age = 30 ,name = Frank ,id = 0 ,likes = nobody } } Exception in thread "main" [Error: unable to resolve method: com.redhat.modifyreproducer.Person.Frank() [arglength=0]] [Near : {... ,name = Frank ....}] ^ [Line: 5, Column: 1] at org.mvel2.PropertyAccessor.getMethod(PropertyAccessor.java:977) at org.mvel2.PropertyAccessor.getBeanProperty(PropertyAccessor.java:687) at org.mvel2.PropertyAccessor.getNormal(PropertyAccessor.java:202) at org.mvel2.PropertyAccessor.get(PropertyAccessor.java:171) at org.mvel2.PropertyAccessor.get(PropertyAccessor.java:151) at org.mvel2.ast.ASTNode.getReducedValue(ASTNode.java:185) at org.mvel2.MVELInterpretedRuntime.parseAndExecuteInterpreted(MVELInterpretedRuntime.java:106) at org.mvel2.MVELInterpretedRuntime.parse(MVELInterpretedRuntime.java:49) at org.mvel2.MVEL.eval(MVEL.java:408) at org.mvel2.util.ParseTools.parseWithExpressions(ParseTools.java:1591) at org.mvel2.ast.WithNode.getReducedValue(WithNode.java:75) at org.mvel2.MVELInterpretedRuntime.parseAndExecuteInterpreted(MVELInterpretedRuntime.java:106) at org.mvel2.MVELInterpretedRuntime.parse(MVELInterpretedRuntime.java:49) at org.mvel2.MVEL.eval(MVEL.java:109) at org.drools.command.runtime.rule.ModifyCommand.execute(ModifyCommand.java:79) at org.drools.impl.StatefulKnowledgeSessionImpl.execute(StatefulKnowledgeSessionImpl.java:798) at org.drools.impl.StatefulKnowledgeSessionImpl.execute(StatefulKnowledgeSessionImpl.java:781) at com.redhat.modifyreproducer.Main.test(Main.java:52) at com.redhat.modifyreproducer.Main.main(Main.java:30) ------------------------------------------------------------------------------ First, fact is inserted into the session, next step is creating Modify command with setter list: Person p1 = new Person("John", "nobody", 25); session.execute(CommandFactory.newInsert(p1)); FactHandle fh = session.getFactHandle(p1); Person p = new Person("Frank", "nobody", 30); List<Setter> setterList = new ArrayList<Setter>(); setterList.add(CommandFactory.newSetter("age", String.valueOf(p.getAge()))); setterList.add(CommandFactory.newSetter("name", p.getName())); setterList.add(CommandFactory.newSetter("likes", p.getLikes())); setterList.add(CommandFactory.newSetter("id", String.valueOf(p.getId()))); session.execute(CommandFactory.newModify(fh, setterList)); See an attachment for the details, just build as maven project and run.