Java · Ödeme risk incelemesi

package example;
import io.sigillum.finans.*;
import com.sun.net.httpserver.HttpServer;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.net.InetSocketAddress;
import java.nio.file.Paths;
import java.nio.charset.StandardCharsets;
import java.util.LinkedHashMap;
import java.util.Map;

public final class PaymentDemo {
    public static void main(String[] args) throws Exception {
        String path = System.getenv("SIGILLUM_CONFIG");
        if (path == null) throw new IllegalArgumentException("SIGILLUM_CONFIG must be set");
        Sigillum sdk = Sigillum.start(Paths.get(path).toAbsolutePath());
        ObjectMapper json = new ObjectMapper();
        HttpServer server = HttpServer.create(new InetSocketAddress("127.0.0.1", 5109), 0);
        server.createContext("/payments/assess", sdk.httpHandler(exchange -> {
            if (!"POST".equals(exchange.getRequestMethod())) {
                exchange.sendResponseHeaders(405, -1); exchange.close(); return;
            }
            byte[] raw = exchange.getRequestBody().readNBytes(8193);
            if (raw.length > 8192) { exchange.sendResponseHeaders(413, -1); exchange.close(); return; }
            var input = json.readTree(raw);
            try (ObservationScope step = sdk.child("payment-rule");
                 Sigillum.Binding current = step.activate()) {
                double amount = input.path("amount").asDouble(-1);
                if (amount <= 0) { exchange.sendResponseHeaders(400, -1); exchange.close(); return; }
                // Sentetik eşik kuralı: gerçek risk modeli veya finans tavsiyesi değildir.
                Map<String,Object> result = new LinkedHashMap<>();
                result.put("requestRef", input.path("requestRef").asText("DEMO-PAYMENT"));
                result.put("amount", amount);
                result.put("reviewRequired", amount > 10000);
                result.put("demonstration", true);
                sdk.ai("policy", "{\"name\":\"demo-amount-threshold\",\"threshold\":10000}".getBytes(StandardCharsets.UTF_8));
                sdk.ai("explanation", "{\"method\":\"deterministic-demo\",\"rule\":\"amount > 10000\"}".getBytes(StandardCharsets.UTF_8));
                byte[] response = json.writeValueAsBytes(result);
                sdk.capture("custom", "payment.result", response);
                sdk.capture(sdk.current(), "source", "comparison.source", "demo.payment/1",
                    "{\"type\":\"demo-result\"}".getBytes(StandardCharsets.UTF_8),
                    new CaptureContent("result", "application/json", "comparison.originalContent", response));
                exchange.getResponseHeaders().set("Content-Type", "application/json");
                exchange.sendResponseHeaders(200, response.length);
                exchange.getResponseBody().write(response);
            } finally { exchange.close(); }
        }));
        server.createContext("/sdk-status", exchange -> {
            byte[] response = sdk.diagnostics().toString().getBytes(StandardCharsets.UTF_8);
            exchange.sendResponseHeaders(200, response.length);
            exchange.getResponseBody().write(response); exchange.close();
        });
        server.start();
        System.out.println("Demo: http://127.0.0.1:5109 — SDK diagnostics: /sdk-status");
    }
}

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion><groupId>example.sigillum</groupId><artifactId>payment-demo</artifactId><version>1.0.0</version>
  <properties><maven.compiler.release>11</maven.compiler.release><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties>
  <dependencies><dependency><groupId>io.sigillum</groupId><artifactId>finans-sdk</artifactId><version>0.11.0</version></dependency></dependencies>
  <build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.13.0</version></plugin><plugin><groupId>org.codehaus.mojo</groupId><artifactId>exec-maven-plugin</artifactId><version>3.5.0</version><configuration><mainClass>example.PaymentDemo</mainClass></configuration></plugin></plugins></build>
</project>