https://github.com/npdeehan/sorting-hat-dmn-example
This is an example of how DMN could have been used in the Harry Potter universe to replace the Sorting Hat
https://github.com/npdeehan/sorting-hat-dmn-example
Last synced: 5 months ago
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This is an example of how DMN could have been used in the Harry Potter universe to replace the Sorting Hat
- Host: GitHub
- URL: https://github.com/npdeehan/sorting-hat-dmn-example
- Owner: NPDeehan
- License: apache-2.0
- Created: 2021-07-20T11:11:22.000Z (almost 5 years ago)
- Default Branch: main
- Last Pushed: 2021-07-30T11:17:26.000Z (almost 5 years ago)
- Last Synced: 2025-01-23T01:34:33.572Z (over 1 year ago)
- Homepage:
- Size: 207 KB
- Stars: 1
- Watchers: 1
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# DMN Sorting Hat
This is an example of how DMN could have been used in the Harry Potter universe to replace the Sorting Hat
## What You will Need
* [Java JDK 11](https://www.oracle.com/java/technologies/javase-jdk11-downloads.html) so that you can run Camunda Platform Run
* [Camunda Platform Run](https://camunda.com/download/) for running BPMN and DMN models
* [Camunda Modeler](https://camunda.com/download/modeler/) for deploying the DMN and BPMN Models
## Running the Project
Startup the Camunda platform.
Open the files in the ``/DMN-BPMN-Models`` and ``/Forms`` folder in the Camunda modeler. From there you can also deploy them by clicking on the deploy button:
then adding all of the files to as part of the deployment.
Once the deployment is successful you can go to `` http://localhost:8080/camunda/app/tasklist/`` login with ``demo/demo`` and start the process!
## The DRD
The highest level you can view the decision is by looking at the Decision requirements diagram.
## The DMN Tables
There are 5 DMN tables in this project. Four of them relate to a House in Harry Potter and return a number. The number that each table returns refers to the affinity a user has with that house. The higher the number, the more affinity to a given house a user.
The hit policy of each table is set to `Collect (Sum)` meaning that multiple rules on this table can match a set of input values. A value called `Score` exists for each rule. All rules that match would have their `Score` added together to give you a single result. This result is the affinity you have for the given house
## The BPMN Model
The BPMN model lets a user enter some data through a UI and then passes that data to the DMN model. It then can take the result and show it to the user in a new user task.
## Evaluating the DMN tables with SwaggerUI
You can evaluate the DMN tables from the Camunda Platform's inbuilt SwaggerUI by going to `http://localhost:8080/swaggerui/#/`
Finding `Decision Definition` in the list and clicking on the `POST /decision-definition/key/{key}/evaluate` call.
Enter the key as `DecideOnHouse` and you can use the below example as the call body
```Json
{
"variables": {
"friend": {
"value": "Jump in the Way",
"type": "String"
},
"houseChoice": {
"value": "Slytherin",
"type": "String"
},
"wand": {
"value": "phoenix feathers",
"type": "String"
},
"quidditch": {
"value": true,
"type": "Boolean"
},
"horkrux": {
"value": 11,
"type": "Long"
},
"potion": {
"value": "Beautification Potion",
"type": "String"
},
"rules": {
"value": true,
"type": "Boolean"
},
"robes": {
"value": true,
"type": "Boolean"
},
"prime": {
"value": 280,
"type": "Long"
},
"milk": {
"value": 0.75,
"type": "Double"
}
}
}
```