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Feature Request
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Resolution: Done
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Major
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0.10.1
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2021 Week 25-27 (from Jun 21), 2021 Week 28-30 (from Jul 12)
We should allow users to use expressions when sending input data from a Process to a DMN.
I.e. The Buyer is an input variable to the DMN task. We need to pass the instance of Buyer, contained in the process variable gift:
Variable Source: #{gift.getBuyer()}
Type: org.example.model.Buyer
Name: Buyer
Expected result: that the DMN will receive the buyer instance contained within the gift instance.
If we follow the jBPM practice in this case for more intuitive usage, the expression #{myObject.getEncapsulated()} should work OOTB.
A reproducer is below.
Reproducer:
$ git clone https://github.com/kmacedovarela/gift-shop-kogito
- start the project.
$ mvn clean compile quarkus:dev
- Access http://localhost:8080/swagger-ui
- Confirm that DMN alone works by checking that values for "price" and "Membership" are not empty or zero.
POST /define-price
{
"Buyer":{"Membership":"gold"},
"Gift":{"ProductName":"console"}
}
- Confirm BPMN + DMN, doesn't work.
POST /order
{
"gift": {
"available": true,
"buyer": {
"id": 0,
"membership": "gold",
"name": "string"
},
"buyerMembership": "string",
"buyerName": "string",
"id": 0,
"price": 0,
"productName": "console"
}
}
Error thrown:
Required dependency 'Buyer' not found on node 'Discount'
2020-06-20 21:50:38,863 INFO [org.exa.ser.ProductStorageService] (executor-thread-96) Checking availability of console 2020-06-20 21:50:38,874 ERROR [org.kie.dmn.cor.imp.DMNRuntimeImpl] (executor-thread-96) Required dependency 'Buyer' not found on node 'Discount' 2020-06-20 21:50:38,881 ERROR [org.kie.dmn.cor.imp.DMNRuntimeImpl] (executor-thread-96) Unable to evaluate decision 'Price with Discount' as it depends on decision 'Discount' 2020-06-20 21:50:38,883 ERROR [org.jbp.wor.ins.imp.WorkflowProcessInstanceImpl] (executor-thread-96) Unexpected error (id e3560d3e-2450-4e9f-bd75-3de33332c33f) while executing node Calculate price with discount in process instance bb4c1ec7-81e8-470a-830b-0f37f8c41435: org.jbpm.workflow.instance.WorkflowRuntimeException: [order:bb4c1ec7-81e8-470a-830b-0f37f8c41435 - Calculate price with discount:3] -- DMN result errors:: Message [id=0, level=ERROR, path=null, line=98, column=-1 text=DMN: Required dependency 'Buyer' not found on node 'Discount' (DMN id: _92F21956-890A-4AC3-87E9-9B15FF0244D5, The referenced node was not found) ], Message [id=0, level=ERROR, path=null, line=147, column=-1 text=DMN: Unable to evaluate decision 'Price with Discount' as it depends on decision 'Discount' (DMN id: _FEB03AAF-84ED-405D-A75A-F986DF58DACA, The referenced node was not found) ]
