Problem with tasks forms in the soa-p 5.3.1 integration with jbpm 5

[jmiguel77]

Hi

I am trying the jbpm 5 integration with soa-p 5.3.1. I am includine two files in the .esb deployment:

- the .bpmn file, with the process definition

- a .ftl file, with a human task form

Through the esb i can start instances of the bpm process, and get to the task i want; after that point, i am using a web client that logins to the bussiness-central-server, shows the tasks for the assignee user, and tries to access the task form, using a url like this:

http://localhost:8080/business-central-server/rs/form/task/1390/render

But when i do this invocation i get an error message like this:

13:17:35,704 WARN  [AbstractFormDispatcher] Could not connect to Guvnor.

13:17:35,715 ERROR [runtime]

Expression task.names[0] is undefined on line 4, column 7 in null.

The problematic instruction:

----------

==> ${task.names[0].text} [on line 4, column 5 in null]

----------

Java backtrace for programmers:

----------

freemarker.core.InvalidReferenceException: Expression task.names[0] is undefined on line 4, column 7 in null.

.....

[tons of exception info]

Caused by: freemarker.core.InvalidReferenceException: Expression task.names[0] is undefined on line 4, column 7 in null.

          at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)

          at freemarker.core.TemplateObject.invalidTypeException(TemplateObject.java:134)

          at freemarker.core.Dot._getAsTemplateModel(Dot.java:78)

          at freemarker.core.Expression.getAsTemplateModel(Expression.java:89)

          at freemarker.core.Expression.getStringValue(Expression.java:93)

          at freemarker.core.DollarVariable.accept(DollarVariable.java:76)

          at freemarker.core.Environment.visit(Environment.java:209)

          at freemarker.core.MixedContent.accept(MixedContent.java:92)

          at freemarker.core.Environment.visit(Environment.java:209)

          at freemarker.core.Environment.process(Environment.java:189)

          at freemarker.template.Template.process(Template.java:237)

          at org.jbpm.integration.console.forms.AbstractFormDispatcher.processTemplate(AbstractFormDispatcher.java:128)

          ... 45 more

So, as you can see, the form dispatcher is trying to connect to guvnor, but there is no guvnor deployed in the server (the installation guide for the jbpm 5 integration, never mentioned guvnor).

How can i access this form ?? or can't i ?? there is another way ??

thanks

[tcunning]

You're right - the JBPM5 / ESB integration guide didn't cover guvnor.      Have you looked at the BRMS documentation?   The "Getting Started" guide covers some of the guvnor installation (I see guvnor.war mentioned), if that doesn't cover installation of guvnor thoroughly, I'd ask on the Drools guvnor forums:

http://drools.46999.n3.nabble.com/Drools-User-forum-f47000.html

[jmiguel77]

Hi Tom, thanks for answering

I deployed the jboss-brms.war that comes inside the brms-deployable; but i get another exception:

16:44:23,342 INFO  [GuvnorConnectionUtils] Could not find process template for: null-taskform

16:44:23,371 ERROR [GuvnorConnectionUtils] Exception checking template url : null

16:44:23,385 ERROR [runtime]

Expression task.names[0] is undefined on line 4, column 7 in null.

The problematic instruction:

----------

==> ${task.names[0].text} [on line 4, column 5 in null]

----------

Java backtrace for programmers:

----------

freemarker.core.InvalidReferenceException: Expression task.names[0] is undefined on line 4, column 7 in null.

and the same stack trace as before.

As you can see, the problem about not finding Guvnor is gone, but now i have another error saying that the task form cannot be found. At first i was only including the .bpmn and .ftl files in the .esb project; but now, besides that, i have deployed them in the guvnor repository as well

Another thing i have noticed, is that, despite i have compiled the package, the process defined in the .bmpn file, does not show in the business-central interface.

any other ideas ?

thanks

[jmiguel77]

Another thing that i found weird about this

I can query the business-central-server, and obtain the list of the tasks that i have assigned to some user; in the list of task, i can see the task belongs to a process instance, and see the id of the process definition. something like:

process instance id: 1111

task id: 1112

process id: ABC

that should mean that the process ABC has at least one instance, with id 1111; but then, if access the url:

http://localhost:8080/business-central-server/rs/process/definition/ABC/instances

I get 0 results:

{"instances":[]}

How can this be ??

[tcunning]

Jose, are you having these issues only through invoking through ESB, or are you having them also while invoking your processes through a standalone program/etc?  

If they are completely ESB-related, then it's something we need to look at, but it sounds like these are configuration / general use sort of issues.      Have you tried posting them to the jbpm forum, or the guvnor forum?     

https://community.jboss.org/en/jbpm?view=discussions

Also - if you have a service contract - don't hesitate to open a case on these.     I'm just not sure what's going on here, and I think you're going to get a lot more help in those other places.

[jmiguel77]

Hi Tom

In a pure brms environment (a brms-standalone server), i am not getting this error; but, of course, in that server i dont have any esb related deployment.

I have posted this same issue in the jbpm section (https://community.jboss.org/message/821398#821398), but so far, nothing helpfull has come off

thanks anyway