Drools 7.x + New Kogito API

Description

A simple rule service to validate LoanApplication fact.

The intent of this project is demonstrating the new programming model introduced in Kogito that is based on the concept of rule units.

A rule unit encapsulates a set of rules, defined in a DRL file, and the facts against which those rules will be matched, implemented with a simple POJO.

A rule unit comes with a second abstraction called data source, that defines a typed entry-point to insert the facts.

Installing and Running

Prerequisites

You will need:

• Java 11+ installed
• Environment variable JAVA_HOME set accordingly
• Maven 3.6.2+ installed

Package and Run in JVM mode

mvn clean package
java -jar target/quarkus-app/quarkus-run.jar

or on windows

mvn clean package
java -jar target\quarkus-app\quarkus-run.jar

Example Usage

POST /find-approved

Returns approved loan applications from the given facts:

curl -X POST -H 'Accept: application/json' -H 'Content-Type: application/json' -d '{"maxAmount":5000,"loanApplications":[{"id":"ABC10001","amount":2000,"deposit":100,"applicant":{"age":45,"name":"John"}}, {"id":"ABC10002","amount":5000,"deposit":100,"applicant":{"age":25,"name":"Paul"}}, {"id":"ABC10015","amount":1000,"deposit":100,"applicant":{"age":12,"name":"George"}}]}' http://localhost:8080/find-approved

or on windows

curl -X POST -H "Accept: application/json" -H "Content-Type: application/json" -d "{\"maxAmount\":5000,\"loanApplications\":[{\"id\":\"ABC10001\",\"amount\":2000,\"deposit\":100,\"applicant\":{\"age\":45,\"name\":\"John\"}}, {\"id\":\"ABC10002\",\"amount\":5000,\"deposit\":100,\"applicant\":{\"age\":25,\"name\":\"Paul\"}}, {\"id\":\"ABC10015\",\"amount\":1000,\"deposit\":100,\"applicant\":{\"age\":12,\"name\":\"George\"}}]}" http://localhost:8080/find-approved

As response an array of loan applications is returned.

Example response:

[
  {
    "id":"ABC10001",
    "applicant":{
      "name":"John",
      "age":45
    },
    "amount":2000,
    "deposit":100,
    "approved":true
  }
]