Unable to Reference a Decision Table from a Process Model

Flowable Engine
1

In Brief: Using Flowable 6.4.2, I’m able to deploy two BPMN 2.0 files and one DMN 1.1 file via a single zip file using the App Engine. The BPMN 2.0 files and DMN 1.1 file all appear to be deployed correctly and are usable, but I can’t reference the DMN 1.1 decision table from one of the BPMN 2.0 process models. I’m sure I’m just missing something, but here’s the error I get:

{
    "message": "Internal server error",
    "exception": "deployment 83cba0f0-0a6b-11ea-8ce0-02424714883b doesn't contain any rules"
}

More Detail: The zip file’s structure is flat, i.e. it contains the files at its top level. The zip file is deployed using the following endpoint:

POST http://localhost:8080/flowable-task/app-api/app-repository/deployments

After deployment, I’m able to execute the decision table using this endpoint:

POST http://localhost:8080/flowable-task/dmn-api/dmn-rule/execute

I’m also able to start an instance of the process definition that doesn’t reference the decision table by calling this endpoint:

POST http://localhost:8080/flowable-task/process-api/runtime/process-instances

However, if I use the endpoint above to attempt to start an instance of the process definition that does reference the decision table, I get the error indicated under “In Brief” above.

As a side note, in order to run an instance of the Business Rule Task containing the reference to the decision table, I had to copy/paste the kie-api-7.6.0.Final.jar JAR file into the flowable-task webapp’s WEB-INF/lib directory. Only after copy/pasting that file was I able to see the error message cited above.

If I’ve missed anything, please let me know! Thanks in advance for any help you can provide.

P.S. Just to confirm, it appears that it isn’t possible to add a decision table to an app within the Flowable Modeler application’s App Editor. Is that correct?

2

Hi,

If you want to execute a DMN Decision Table you should use the Decision Task instead of the Business Rule Task. The Business Rule Task is for referring and executing Drools rules.
For executing DMN Decision Tables on the Flowable DMN Engine no external libraries are needed.

Regards,

Yvo

3

Yep, I was sure of it; I was missing something. :grinning: Thanks, yvo.

By the way, for anyone viewing this thread in the future… Though It doesn’t appear that you can select decision tables manually for inclusion in an app in Modeler, Modeler does deploy decision tables when they’re referenced from included process model(s).

-Ryan