Provide topic offsets in list (#647)

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

@@ -108,7 +108,7 @@ public class ClusterService {
     var topicsToSkip = (page.filter(positiveInt).orElse(1) - 1) * perPage;
     var cluster = clustersStorage.getClusterByName(name)
         .orElseThrow(ClusterNotFoundException::new);
-    List<Topic> topics = cluster.getTopics().values().stream()
+    List<InternalTopic> topics = cluster.getTopics().values().stream()
         .filter(topic -> !topic.isInternal()
             || showInternal
             .map(i -> topic.isInternal() == i)
@@ -118,7 +118,6 @@ public class ClusterService {
                 .map(s -> StringUtils.containsIgnoreCase(topic.getName(), s))
                 .orElse(true))
         .sorted(getComparatorForTopic(sortBy))
-        .map(clusterMapper::toTopic)
         .collect(Collectors.toList());
     var totalPages = (topics.size() / perPage)
         + (topics.size() % perPage == 0 ? 0 : 1);
@@ -128,6 +127,13 @@ public class ClusterService {
             topics.stream()
                 .skip(topicsToSkip)
                 .limit(perPage)
+                .map(t ->
+                    clusterMapper.toTopic(
+                        t.toBuilder().partitions(
+                          kafkaService.getTopicPartitions(cluster, t)
+                        ).build()
+                    )
+                )
                 .collect(Collectors.toList())
         );
   }

kafka-ui-api/src/test/java/com/provectus/kafka/ui/service/ClusterServiceTest.java

@@ -1,6 +1,7 @@
 package com.provectus.kafka.ui.service;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.when;
 
 import com.provectus.kafka.ui.mapper.ClusterMapper;
@@ -31,22 +32,32 @@ class ClusterServiceTest {
   private ClusterService clusterService;
   @Mock
   private ClustersStorage clustersStorage;
+  @Mock
+  private KafkaService kafkaService;
 
   @Test
   public void shouldListFirst25Topics() {
     var topicName = UUID.randomUUID().toString();
 
+    final KafkaCluster cluster = KafkaCluster.builder()
+        .topics(
+            IntStream.rangeClosed(1, 100).boxed()
+                .map(Objects::toString)
+                .collect(Collectors.toMap(Function.identity(), e -> InternalTopic.builder()
+                    .partitions(Map.of())
+                    .name(e)
+                    .build()))
+        )
+        .build();
+
     when(clustersStorage.getClusterByName(topicName))
-        .thenReturn(Optional.of(KafkaCluster.builder()
-            .topics(
-                IntStream.rangeClosed(1, 100).boxed()
-                    .map(Objects::toString)
-                    .collect(Collectors.toMap(Function.identity(), e -> InternalTopic.builder()
-                        .partitions(Map.of())
-                        .name(e)
-                        .build()))
-            )
-            .build()));
+        .thenReturn(Optional.of(cluster));
+
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
 
     var topics = clusterService.getTopics(topicName,
         Optional.empty(), Optional.empty(), Optional.empty(),
@@ -72,6 +83,13 @@ class ClusterServiceTest {
             )
             .build()));
 
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
+
+
     var topics = clusterService.getTopics(topicName, Optional.of(4), Optional.of(33),
         Optional.empty(), Optional.empty(), Optional.empty());
     assertThat(topics.getPageCount()).isEqualTo(4);
@@ -95,6 +113,13 @@ class ClusterServiceTest {
             )
             .build()));
 
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
+
+
     var topics = clusterService.getTopics(topicName, Optional.of(0), Optional.of(-1),
         Optional.empty(), Optional.empty(), Optional.empty());
     assertThat(topics.getPageCount()).isEqualTo(4);
@@ -119,6 +144,13 @@ class ClusterServiceTest {
             )
             .build()));
 
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
+
+
     var topics = clusterService.getTopics(topicName,
         Optional.empty(), Optional.empty(), Optional.of(true),
         Optional.empty(), Optional.empty());
@@ -145,6 +177,13 @@ class ClusterServiceTest {
             )
             .build()));
 
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
+
+
     var topics = clusterService.getTopics(topicName,
         Optional.empty(), Optional.empty(), Optional.of(true),
         Optional.empty(), Optional.empty());
@@ -170,6 +209,13 @@ class ClusterServiceTest {
             )
             .build()));
 
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
+
+
     var topics = clusterService.getTopics(topicName,
         Optional.empty(), Optional.empty(), Optional.empty(),
         Optional.of("1"), Optional.empty());
@@ -195,6 +241,13 @@ class ClusterServiceTest {
             )
             .build()));
 
+    when(
+        kafkaService.getTopicPartitions(any(), any())
+    ).thenReturn(
+        Map.of()
+    );
+
+
     var topics = clusterService.getTopics(topicName,
         Optional.empty(), Optional.empty(), Optional.empty(),
         Optional.empty(), Optional.of(TopicColumnsToSort.TOTAL_PARTITIONS));