NOTE | Looking for modern decision tables? Kogito, like Drools, offers support of the DMN open standard for visual and semantic execution of declarative logic. The business rules in this example may be also expressed using DMN decision tables (or other visual paradigm of DMN), instead of Drools XLS decision tables. For more information about DMN support in Kogito, you may refer to the Kogito DMN documentation. |
A rule service to validate LoanApplication fact. Rules are written as a decision table.
REST endpoints are generated from query rules. You can insert LoanApplication facts and query a result via the REST endpoints. Rule resources are assembled as a RuleUnit.
You will need:
mvn clean compile spring-boot:run
mvn clean package java -jar target/decisiontable-springboot-example.jar
The Swagger page shows all the available endpoints, and it could be used to test them. You can take a look at the OpenAPI definition - automatically generated and included in this service - to determine all available operations exposed by this service. For easy readability you can visualize the OpenAPI definition file using a UI tool like for example available Swagger Editor.
In addition, various clients to interact with this service can be easily generated using this OpenAPI definition.
Once the service is up and running, you can use the following examples to interact with the service.
Returns approved loan applications from the given facts:
Given facts:
{ "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"} } ] }
Example curl request (using the JSON above):
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 } ]
Returns ids and amount values of rejected loan applications from the given facts:
Example curl request (using the JSON from previous example):
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-not-approved-id-and-amount
As response an array of loan application ids and amount values is returned.
Example response:
[ { "$amount":5000, "$id":"ABC10002" }, { "$amount":1000, "$id":"ABC10015" } ]