fix metadata endpoint

Author: ole-ve

api-gateway/src/main/java/de/tum/cit/aet/api_gateway/AggregatedProfileResource.java

@@ -1,20 +1,26 @@
 package de.tum.cit.aet.api_gateway;
 
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.cloud.client.ServiceInstance;
 import org.springframework.cloud.client.discovery.DiscoveryClient;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 
 import java.util.Arrays;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import static de.tum.cit.aet.api_gateway.Constants.ARTEMIS_SERVICE_ID;
 
 @RestController
 public class AggregatedProfileResource {
 
+    @Value("${custom-routing.profileMetadataKey}")
+    private String profileMetadataKey;
+
     private final DiscoveryClient discoveryClient;
 
     private final ProfilePathStore profilePathStore;
@@ -33,8 +39,19 @@ public Set<String> activatedProfiles() {
         List<ServiceInstance> serviceInstances = discoveryClient.getInstances(ARTEMIS_SERVICE_ID);
 
         return serviceInstances.stream()
-            .flatMap(serviceInstance -> Arrays.stream(serviceInstance.getMetadata().getOrDefault(profilePathStore.getDefaultProfile(), "").split(",")))
-            .filter(profile -> !profile.isEmpty())
+            .flatMap(serviceInstance -> {
+                Map<String, String> metadata = serviceInstance.getMetadata();
+                if (metadata.isEmpty()) {
+                    return Stream.empty();
+                }
+
+                String profiles = metadata.get(profileMetadataKey);
+                if (profiles == null) {
+                    return Stream.empty();
+                }
+
+                return Arrays.stream(profiles.split(","));
+            })
             .collect(Collectors.toSet());
     }