tonyhernandez/json-rules-service

Simple node app that wraps the json-rules-engine library to allow you to externally run and execute business rules.

json-rules-service

Getting Started

Json rules service wraps the json-rules-engine in an API that allows you to run your business rules and decision outcomes via an external service. A simple POST API to effortlesly run business rules defined in json files created using json-rule-editor.

Process to implement json rule file in the service is as follows

• Generate rule file using json rule editor
• Place the generated file in the src/rules folder,
• and pass the name of the file (without .json) and input parameters to the API to get the output.

Usage:

To launch the json rule editor tool, you can do either of the below

1. Click json rule editor
2. or install it locally via git clone https://github.com/vinzdeveloper/json-rule-editor.git
   • start the application by npm install and npm start
3. Create your business rules and then download the json file to src/rules/. The detailed steps to create json rule file using this tool can be found here.
4. Start the rules service by running npm install and npm start
5. Call the API to execute your rules:

    curl --location --request POST 'http://localhost:3000/rule' \
          --header 'Content-Type: application/json' \
          --data-raw '{
               "inputs": {
                    "item": "bone"  <-- facts/inputs you created for your rule
               },
               "rules" : "discount-rules"  <-- name of your rules json file
          }'