https://github.com/tasso94/camunda-dmn-feel-1.2-example
Calculate Credit Sum Example – Camunda BPM DMN FEEL 1.2
https://github.com/tasso94/camunda-dmn-feel-1.2-example
bpm camunda dmn dmn-engine feel omg
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Calculate Credit Sum Example – Camunda BPM DMN FEEL 1.2
- Host: GitHub
- URL: https://github.com/tasso94/camunda-dmn-feel-1.2-example
- Owner: tasso94
- Created: 2020-02-25T12:04:53.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2020-03-10T12:33:30.000Z (over 5 years ago)
- Last Synced: 2025-01-25T23:29:49.743Z (5 months ago)
- Topics: bpm, camunda, dmn, dmn-engine, feel, omg
- Language: Java
- Homepage:
- Size: 842 KB
- Stars: 2
- Watchers: 1
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
## Example: DMN FEEL 1.2 for Camunda BPM Platform
Let's have a look at the following example to get a better understanding of how **FEEL 1.2** integrates
with Camunda BPM.
In this example, we want to calculate the maximum credit sum that we can grant to a customer based
on the requested type of the credit and the credit score.
When the credit score of a customer is…
* ... weaker than 80% of the average credit score:\
no credit is granted
* ... between 80% and 100% of the average credit score:\
the historical average credit sum is granted
* ... better than the average credit score:\
1.5 times of the historical average credit sum is granted
Based on the business context explained above, I created a DMN Decison Table & Literal Expression
which uses **FEEL 1.2 Expressions** exclusively.
![Decision Table]
![Literal Expression]
### Step-By-Step Guide
To try out the example yourself, follow the step-by-step guide below.
**Step 1: Run Camunda BPM**
Run the following command in your terminal:
```
mvn clean install && java -jar ./target/feel-example-1.0.0-SNAPSHOT.jar
```
**Step 2: Evaluate Decision**
Evaluate the decision by performing the following REST API request:
`POST /decision-definition/key/calc-credit-sum/evaluate`
```javascript
{
"variables":{
"credit_history":{
"value":" [{\"type\":\"personal-loan\", \"score\": 505, \"granted_sum\": 1554.30}, {\"type\":\"mortgage\", \"score\": 931, \"granted_sum\": 600900.43}, {\"type\":\"mortgage\", \"score\": 754, \"granted_sum\": 210000.00}, {\"type\":\"personal-loan\", \"score\": 437, \"granted_sum\": 1900.44}]",
"type": "Json"
},
"credit_score":{
"value": 800
},
"credit_type":{
"value": "mortgage"
}
}
}
```
**Step 3: Review Decision History**
Go to Cockpit and open the decision instance view to see the result:
![Camunda Cockpit "Decision Instance View"]
[Camunda BPM 7.13.0-alpha2]: https://camunda.com/download/
[calc-credit-sum.dmn]: ./src/main/resources/calc-credit-sum.dmn
[Decision Table]: ./assets/decision-table.png
[Literal Expression]: ./assets/literal-expression.png
[Camunda Cockpit "Decision Instance View"]: ./assets/cockpit-decision-instance-view.png