changed calls from loop into vars, changed foreach to map

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/service/ClusterService.java

@@ -72,13 +72,10 @@ public class ClusterService {
                 .flatMap(s -> ClusterUtil.toMono(cluster.getAdminClient()
                         .describeConsumerGroups(s.stream().map(ConsumerGroupListing::groupId).collect(Collectors.toList())).all()))
                 .map(s -> {
-                    ConsumerGroupDetails result = new ConsumerGroupDetails();
+                    var consumerDetails = s.get(consumerGroupId).members().stream().map(s1 -> ClusterUtil.partlyConvertToConsumerDetail(s1, consumerGroupId, cluster)).collect(Collectors.toList());
+                    var result = new ConsumerGroupDetails();
+                    result.setConsumers(consumerDetails);
                     result.setConsumerGroupId(consumerGroupId);
-                    result.setConsumers(new ArrayList<>());
-                    s.get(consumerGroupId).members().forEach(s1 -> {
-                        ConsumerDetail partlyResult = ClusterUtil.partlyConvertToConsumerDetail(s1, consumerGroupId, cluster);
-                        result.getConsumers().add(partlyResult);
-                    });
                     return result;
                 })
                 .flatMap(s -> ClusterUtil.toMono(cluster.getAdminClient().listConsumerGroupOffsets(consumerGroupId).partitionsToOffsetAndMetadata())
@@ -102,10 +99,13 @@ public class ClusterService {
     private void fillOffsetParams(ConsumerDetail consumerDetail, Map<TopicPartition, OffsetAndMetadata> topicMetadata) {
         List<Long> currentOffsets = new ArrayList<>();
         List<Long> behindMessagesList = new ArrayList<>();
+        var endOffsets = consumerDetail.getEndOffset();
+        var topics = consumerDetail.getTopic();
+        var partitions = consumerDetail.getPartition();
         for (int i = 0; i < consumerDetail.getTopic().size(); i++) {
-            Long currentOffset = topicMetadata.get(new TopicPartition(consumerDetail.getTopic().get(i), consumerDetail.getPartition().get(i))).offset();
+            Long currentOffset = topicMetadata.get(new TopicPartition(topics.get(i), partitions.get(i))).offset();
             currentOffsets.add(currentOffset);
-            behindMessagesList.add(consumerDetail.getEndOffset().get(i) - currentOffset);
+            behindMessagesList.add(endOffsets.get(i) - currentOffset);
         }
         consumerDetail.setCurrentOffset(currentOffsets);
         consumerDetail.setMessagesBehind(behindMessagesList);