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Chapter 8. Interacting with a running Red Hat build of Kogito microservice

After your Red Hat build of Kogito microservice is running, you can send REST API requests to interact with your application and execute your microservices according to how you set up the application.

This example tests the /persons REST API endpoint that is automatically generated the decisions in the PersonDecisions.dmn file (or the rules in the PersonRules.drl file if you used a DRL rule unit).

For this example, use a REST client, curl utility, or the Swagger UI configured for the application (such as http://localhost:8080/q/swagger-ui or http://localhost:8080/swagger-ui.html) to send API requests with the following components:

  • URL: http://localhost:8080/persons
  • HTTP headers: For POST requests only:

    • accept: application/json
    • content-type: application/json
  • HTTP methods: GET, POST, or DELETE

Example POST request body to add an adult (JSON)

{
  "person": {
    "name": "John Quark",
    "age": 20
  }
}

Example curl command to add an adult

curl -X POST http://localhost:8080/persons -H 'content-type: application/json' -H 'accept: application/json' -d '{"person": {"name":"John Quark", "age": 20}}'

Example response (JSON)

{
  "id": "3af806dd-8819-4734-a934-728f4c819682",
  "person": {
    "name": "John Quark",
    "age": 20,
    "adult": false
  },
  "isAdult": true
}

This example procedure uses curl commands for convenience.

Procedure

In a command terminal window that is separate from your running application, navigate to the project that contains your Red Hat build of Kogito microservice and use any of the following curl commands with JSON requests to interact with your running microservice:

Note

On Spring Boot, you might need to modify how your application exposes API endpoints in order for these example requests to function. For more information, see the README file included in the example Spring Boot project that you created for this tutorial.

  • Add an adult person:

    Example request

    curl -X POST http://localhost:8080/persons -H 'content-type: application/json' -H 'accept: application/json' -d '{"person": {"name":"John Quark", "age": 20}}'

    Example response

    {"id":"3af806dd-8819-4734-a934-728f4c819682","person":{"name":"John Quark","age":20,"adult":false},"isAdult":true}

  • Add an underage person:

    Example request

    curl -X POST http://localhost:8080/persons -H 'content-type: application/json' -H 'accept: application/json' -d '{"person": {"name":"Jenny Quark", "age": 15}}'

    Example response

    {"id":"8eef502b-012b-4628-acb7-73418a089c08","person":{"name":"Jenny Quark","age":15,"adult":false},"isAdult":false}

  • Complete the evaluation using the returned UUIDs:

    Example request

    curl -X POST http://localhost:8080/persons/8eef502b-012b-4628-acb7-73418a089c08/ChildrenHandling/cdec4241-d676-47de-8c55-4ee4f9598bac -H 'content-type: application/json' -H 'accept: application/json' -d '{}'