topic Re: BusinessRuleTask - deploy error in Alfresco Archive

BusinessRuleTask - deploy error

rdenner — Tue, 08 Mar 2011 06:53:27 GMT

Hi,I want to use the new BusinessRuleTask element for a test.I defined a rule (drl) file, which I include in the Business Archive (bar).I modeled a simple process and two forms. The BusinessRuleTaskexecutes 2 rules, gets 2 input variables and delivers 1 result variable.Here is an example of one of m

Re: BusinessRuleTask - deploy error

rdenner — Tue, 08 Mar 2011 07:46:41 GMT

Hi,

I deployed my bar file now via activiti-probe. The import went fine.

The first thing I noticed in activiti-explorer was the missing BusinessRuleTask element
in the graphical represenation which I called with Show Diagram. But thats no problem.

I started the process, filled out the first form, which is referenced by the start event.
After leaving this form, I get an error:
02080004 Wrapped Exception (with status template): deployment xxxx doesn't contain any rules

I checked the bar file before deployment, there is a drl file with my rules in this package.

Does anyone have an advice?

I also attach my bar file which includes the process, 2 forms and the rule file.
(Bar extension is not allowed, so I renamed the file to zip)

Regards,
Rainer.

Re: BusinessRuleTask - deploy error

trademak — Tue, 08 Mar 2011 12:43:14 GMT

Hi,

Thanks for providing the BAR file example.
I'll look into this, this evening.

Best regards,

Re: BusinessRuleTask - deploy error

trademak — Tue, 08 Mar 2011 22:06:22 GMT

Hi,

I've noticed a couple of things that you should think about when using the business rule task:

1. The drools-api, drools-compiler, drools-core and mvel2 jar files are missing from the activiti-rest application, so you have to add those manually.
2. In the activiti-cfg.xml inside the activiti-cfg.jar in the activiti-rest application you have to include the following property:

<property name="customPostDeployers">
      <list>
        <bean class="org.activiti.engine.impl.rules.RulesDeployer" />
      </list>
</property>

This is missing in the userguide, but needs to be in the activiti-cfg.xml file to get the rules deployed.

3. Make sure you create a valid drl file. It's important to use Javabeans as input variables and output variables.
So maybe you could create a Javabean with salary and age as attributes. The same for the result variable.
4. I saw the bpmn20.xml in your BAR file is inside the diagrams folder. It's better to have it at the root of the BAR file.

With these changes it should work. Let me know if it works for you.

Best regards,

Re: BusinessRuleTask - deploy error

rdenner — Wed, 09 Mar 2011 11:29:33 GMT

Hi,

thanks for your reply and the detailed explanation.

I have only one question for understanding. I have to use Javabeans to map the processvariables to drools.
But how do the Javabeans get the processvariables? Do I have to make a Delegate for input and output variables to
initialize the Javabeans? The Delegate could be created with a Service Task or as a Listener.

Regards,
Rainer.

Re: BusinessRuleTask - deploy error

trademak — Wed, 09 Mar 2011 12:27:34 GMT

Hi,

Right, a simple way to do this is to create a java service task before the business rule task is invoked to set the process variables in the java bean and store the java bean as a new process variable. Then the output of the ruleset should also be a javabean.

Best regards,

Re: BusinessRuleTask - deploy error

rdenner — Wed, 09 Mar 2011 12:32:25 GMT

Hi,

thanks for your affirmation. I will test this solution and give you feedback.

Regards,
Rainer.

Re: BusinessRuleTask - deploy error

rdenner — Wed, 09 Mar 2011 20:29:54 GMT

Hi,

I made two beans for input and output variables. I also made a delegate for
creating the beans. But I think my rule never gets fired. I made several tests
but without success.

I attached my small eclipse test project. Perhaps you can see where I made an error.

Thanks,
Rainer.

Re: BusinessRuleTask - deploy error

trademak — Thu, 10 Mar 2011 11:29:19 GMT

Hi,

I made a couple of changes and now it works. You can find the project (using the Activiti Designer) attached.
The changes include:

1. input variable should be ${ruleInput}
2. drl file is changed
3. I've added another service task to get the right output variable.

Best regards,

Re: BusinessRuleTask - deploy error

rdenner — Thu, 10 Mar 2011 21:54:13 GMT

Hi,

thanks for your effort.
It works all now.

Regards,
Rainer.

Re: BusinessRuleTask - deploy error

vasanthmiste — Fri, 30 Sep 2011 05:34:38 GMT

Hi,
I have done all the steps that mentioned in this thread, but still i am getting 'deployment xxxx doesn't contain any rules' exception.

I tried with your rule demo package also, i am using Activiti5.7.

Do i need to anything other than mentioned here..

Re: BusinessRuleTask - deploy error

trademak — Fri, 30 Sep 2011 07:11:05 GMT

Hi,

Did you try this out on the Activiti Explorer?
You can find a full example about using the business rule tasks here (http://code.google.com/p/activitiinaction/). A lot more details are in chapter 12 of the Activiti in Action book.

Best regards,

Re: BusinessRuleTask - deploy error

vasanthmiste — Fri, 30 Sep 2011 11:54:13 GMT

Yea, i did it explorer only. Do we need to make any changes in the activiti applications like config file changes..

Could you please share the steps to deply and run the demo project[that you attached in this thread] once after the successful setup of activiti.

This is would be greatly helpful..

Re: BusinessRuleTask - deploy error

trademak — Fri, 30 Sep 2011 14:06:25 GMT

I would recommend reading chapter 12 of Activiti in Action, because it's all explained there.

Best regards,

Re: BusinessRuleTask - deploy error

mikedias — Tue, 14 Aug 2012 21:12:51 GMT

Sorry to resurrect the topic, but I am starting development using the Activiti and I like it.

However, I found strange create a Service Task to initialize a bean with the Process Variables and send the bean to Drools.

Can I just pass the DelegateExecution object with all variables to Drools? Will be more flexible.

Thanks.

Re: BusinessRuleTask - deploy error

ronald_van_kuij — Tue, 14 Aug 2012 21:26:06 GMT

If you do not use the existing businessrule task but create your own service task, you might get this working. But the delegate execution is such a 'low level' object that it is not common to do this.

Re: BusinessRuleTask - deploy error

mikedias — Tue, 14 Aug 2012 21:54:24 GMT

Ronald, thanks for answer!

Create my service task is a interesting way. I will test this.

But I think that the default behavior of the Business Rule Task should be send all Process Variables to Drools into a wrapper. This is just my impression about this, please correct me if I'm wrong!

Thanks.

Re: BusinessRuleTask - deploy error

trademak — Wed, 15 Aug 2012 07:36:47 GMT

Hi Mike,

Well, that's certainly a possibility. If you don't specify input variables automatically all variables of the execution are added to the Drools execution.
Let me know if that's what you are looking for.

Best regards,

Re: BusinessRuleTask - deploy error

ronald_van_kuij — Wed, 15 Aug 2012 07:42:39 GMT

Hmmmm, personally I don't like these kinds of defaults…

Re: BusinessRuleTask - deploy error

trademak — Wed, 15 Aug 2012 07:47:03 GMT

Hi,

We could also add an additional attribute like copyProcessVariables that defaults to false and that you can set to true.

Best regards,