Add skeletton to save traces.

backend/codiki-application/src/main/java/org/codiki/application/traffic/TrafficTraceUseCases.java

@@ -0,0 +1,42 @@
+package org.codiki.application.traffic;
+
+import jakarta.annotation.Nullable;
+import org.codiki.domain.traffic.exception.TrafficTraceCreationException;
+import org.codiki.domain.traffic.model.TrafficEndpoint;
+import org.codiki.domain.traffic.model.TrafficTrace;
+import org.codiki.domain.traffic.port.TrafficTracePort;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import java.time.Clock;
+import java.time.ZonedDateTime;
+import java.util.UUID;
+
+import static java.util.Objects.isNull;
+import static org.codiki.domain.traffic.model.TrafficTrace.aTrafficTrace;
+
+@Component
+public class TrafficTraceUseCases {
+    private final TrafficTracePort trafficTracePort;
+    private final Clock clock;
+
+    public TrafficTraceUseCases(TrafficTracePort trafficTracePort, Clock clock) {
+        this.trafficTracePort = trafficTracePort;
+        this.clock = clock;
+    }
+
+    @Async
+    public void saveNewTrace(TrafficEndpoint trafficEndpoint, @Nullable String correlationId) {
+        if (isNull(trafficEndpoint)) {
+            throw new TrafficTraceCreationException("Traffic endpoint should not be null.");
+        }
+
+        TrafficTrace newTrace = aTrafficTrace()
+                .withId(UUID.randomUUID())
+                .withDateTime(ZonedDateTime.now(clock))
+                .withEndpoint(trafficEndpoint)
+                .withCorrelationId(correlationId)
+                .build();
+        trafficTracePort.save(newTrace);
+    }
+}