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Java

Project Information​

Installation​

Add the dependency to your pom.xml:

<dependency>
    <groupId>com.quantumdmn</groupId>
    <artifactId>dmn-sdk</artifactId>
    <version>1.0.0</version>
</dependency>

Usage​

import com.quantumdmn.client.DmnEngine;
import com.quantumdmn.client.DmnService;
import com.quantumdmn.client.model.EvaluationResult;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.Map;
import java.util.HashMap;

public class Example {

    public static void main(String[] args) throws Exception {
        // Configuration
        String keyFile = "path/to/service-user.json";
        String projectId = "YOUR_DMN_PROJECT_ID";
        String definitionId = "YOUR_DEFINITION_ID";
        String authProjectId = "YOUR_ZITADEL_PROJECT_ID";
        String apiUrl = "https://api.quantumdmn.com";

        // Set system properties for configuration
        System.setProperty("quantumdmn.auth.zitadel.key-file", keyFile);
        System.setProperty("quantumdmn.auth.zitadel.project-id", authProjectId);
        System.setProperty("quantumdmn.base-url", apiUrl);

        // Initialize Service
        DmnService dmnService = new DmnService(); 
        
        // Create Engine
        DmnEngine engine = new DmnEngine(dmnService, projectId);
        
        // Prepare Context
        Map<String, Object> context = new HashMap<>();
        context.put("RequestedAmt", 1000);

        // Evaluate
        try {
            Map<String, EvaluationResult> results = engine.evaluate(definitionId, null, context);

            System.out.println("Result:");
            for (Map.Entry<String, EvaluationResult> entry : results.entrySet()) {
                 System.out.println(entry.getKey() + ": " + entry.getValue().getValue());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Spring Boot Support​

If you are using Spring Boot, you can configure the SDK using your application.properties or application.yml file and inject the DmnService directly.

application.properties:

quantumdmn.auth.zitadel.key-file=path/to/service-user.json
quantumdmn.auth.zitadel.project-id=YOUR_ZITADEL_PROJECT_ID
quantumdmn.base-url=https://api.quantumdmn.com

Java Code:

@Service
public class MyService {

    private final DmnService dmnService;

    public MyService(DmnService dmnService) {
        this.dmnService = dmnService;
    }

    public void evaluateDecision(String projectId, String definitionId, Map<String, Object> context) {
        DmnEngine engine = new DmnEngine(dmnService, projectId);
        try {
            Map<String, EvaluationResult> results = engine.evaluate(definitionId, null, context);
            // Process results...
        } catch (Exception e) {
            // Handle error...
        }
    }
}