BE: Chore: Cleanup api module

api/src/main/java/io/kafbat/ui/client/RetryingKafkaConnectClient.java

@@ -12,7 +12,7 @@
 import io.kafbat.ui.connect.model.ConnectorTopics;
 import io.kafbat.ui.connect.model.NewConnector;
 import io.kafbat.ui.connect.model.TaskStatus;
-import io.kafbat.ui.exception.KafkaConnectConflictReponseException;
+import io.kafbat.ui.exception.KafkaConnectConflictResponseException;
 import io.kafbat.ui.exception.ValidationException;
 import io.kafbat.ui.util.WebClientConfigurator;
 import jakarta.validation.constraints.NotNull;
@@ -48,7 +48,7 @@ private static Retry conflictCodeRetry() {
         .fixedDelay(MAX_RETRIES, RETRIES_DELAY)
         .filter(e -> e instanceof WebClientResponseException.Conflict)
         .onRetryExhaustedThrow((spec, signal) ->
-            new KafkaConnectConflictReponseException(
+            new KafkaConnectConflictResponseException(
                 (WebClientResponseException.Conflict) signal.failure()));
   }
 

api/src/main/java/io/kafbat/ui/config/auth/BasicAuthSecurityConfig.java

@@ -1,8 +1,6 @@
 package io.kafbat.ui.config.auth;
 
-import io.kafbat.ui.util.EmptyRedirectStrategy;
 import io.kafbat.ui.util.StaticFileWebFilter;
-import java.net.URI;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
@@ -12,8 +10,6 @@
 import org.springframework.security.config.web.server.SecurityWebFiltersOrder;
 import org.springframework.security.config.web.server.ServerHttpSecurity;
 import org.springframework.security.web.server.SecurityWebFilterChain;
-import org.springframework.security.web.server.authentication.RedirectServerAuthenticationSuccessHandler;
-import org.springframework.security.web.server.authentication.logout.RedirectServerLogoutSuccessHandler;
 import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatchers;
 
 @Configuration

api/src/main/java/io/kafbat/ui/config/auth/logout/CognitoLogoutSuccessHandler.java

@@ -40,7 +40,7 @@ public Mono<Void> handle(WebFilterExchange exchange, Authentication authenticati
         requestUri.getPath(), requestUri.getQuery());
 
     final UriComponents baseUrl = UriComponentsBuilder
-        .fromHttpUrl(fullUrl)
+        .fromUriString(fullUrl)
         .replacePath("/")
         .replaceQuery(null)
         .fragment(null)

api/src/main/java/io/kafbat/ui/emitter/OffsetsInfo.java

@@ -53,7 +53,7 @@ private Map<TopicPartition, Long> firstOffsetsForPolling(Consumer<?, ?> consumer
                                                            Collection<TopicPartition> partitions) {
     try {
       // we try to use offsetsForTimes() to find earliest offsets, since for
-      // some topics (like compacted) beginningOffsets() ruturning 0 offsets
+      // some topics (like compacted) beginningOffsets() returning 0 offsets
       // even when effectively first offset can be very high
       var offsets = consumer.offsetsForTimes(
           partitions.stream().collect(Collectors.toMap(p -> p, p -> 0L))

api/src/main/java/io/kafbat/ui/exception/CelException.java

@@ -1,7 +1,7 @@
 package io.kafbat.ui.exception;
 
 public class CelException extends CustomBaseException {
-  private String celOriginalExpression;
+  private final String celOriginalExpression;
 
   public CelException(String celOriginalExpression, String errorMessage) {
     super("CEL error. Original expression: %s. Error message: %s".formatted(celOriginalExpression, errorMessage));

api/src/main/java/io/kafbat/ui/exception/ErrorCode.java

@@ -4,25 +4,19 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
 
-
 public enum ErrorCode {
 
-  FORBIDDEN(403, HttpStatus.FORBIDDEN),
-
   UNEXPECTED(5000, HttpStatus.INTERNAL_SERVER_ERROR),
   KSQL_API_ERROR(5001, HttpStatus.INTERNAL_SERVER_ERROR),
   BINDING_FAIL(4001, HttpStatus.BAD_REQUEST),
   NOT_FOUND(404, HttpStatus.NOT_FOUND),
   VALIDATION_FAIL(4002, HttpStatus.BAD_REQUEST),
   READ_ONLY_MODE_ENABLE(4003, HttpStatus.METHOD_NOT_ALLOWED),
   CONNECT_CONFLICT_RESPONSE(4004, HttpStatus.CONFLICT),
-  DUPLICATED_ENTITY(4005, HttpStatus.CONFLICT),
   UNPROCESSABLE_ENTITY(4006, HttpStatus.UNPROCESSABLE_ENTITY),
   CLUSTER_NOT_FOUND(4007, HttpStatus.NOT_FOUND),
   TOPIC_NOT_FOUND(4008, HttpStatus.NOT_FOUND),
   SCHEMA_NOT_FOUND(4009, HttpStatus.NOT_FOUND),
-  CONNECT_NOT_FOUND(4010, HttpStatus.NOT_FOUND),
-  KSQLDB_NOT_FOUND(4011, HttpStatus.NOT_FOUND),
   DIR_NOT_FOUND(4012, HttpStatus.BAD_REQUEST),
   TOPIC_OR_PARTITION_NOT_FOUND(4013, HttpStatus.BAD_REQUEST),
   INVALID_REQUEST(4014, HttpStatus.BAD_REQUEST),

api/src/main/java/io/kafbat/ui/exception/GlobalErrorWebExceptionHandler.java

@@ -102,8 +102,7 @@ private Mono<ServerResponse> render(CustomBaseException baseException, ServerReq
 
   private Mono<ServerResponse> render(WebExchangeBindException exception, ServerRequest request) {
     Map<String, Set<String>> fieldErrorsMap = exception.getFieldErrors().stream()
-        .collect(Collectors
-            .toMap(FieldError::getField, f -> Set.of(extractFieldErrorMsg(f)), Sets::union));
+        .collect(Collectors.toMap(FieldError::getField, f -> Set.of(extractFieldErrorMsg(f)), Sets::union));
 
     var fieldsErrors = fieldErrorsMap.entrySet().stream()
         .map(e -> {
@@ -151,9 +150,7 @@ private String requestId(ServerRequest request) {
   }
 
   private Consumer<HttpHeaders> headers(ServerRequest request) {
-    return (HttpHeaders headers) -> {
-      CorsGlobalConfiguration.fillCorsHeader(headers, request.exchange().getRequest());
-    };
+    return (HttpHeaders headers) -> CorsGlobalConfiguration.fillCorsHeader(headers, request.exchange().getRequest());
   }
 
   private BigDecimal currentTimestamp() {

api/src/main/java/io/kafbat/ui/exception/KafkaConnectConflictReponseException.java → api/src/main/java/io/kafbat/ui/exception/KafkaConnectConflictResponseException.java

@@ -1,11 +1,10 @@
 package io.kafbat.ui.exception;
 
-
 import org.springframework.web.reactive.function.client.WebClientResponseException;
 
-public class KafkaConnectConflictReponseException extends CustomBaseException {
+public class KafkaConnectConflictResponseException extends CustomBaseException {
 
-  public KafkaConnectConflictReponseException(WebClientResponseException.Conflict e) {
+  public KafkaConnectConflictResponseException(WebClientResponseException.Conflict e) {
     super("Kafka Connect responded with 409 (Conflict) code. Response body: "
         + e.getResponseBodyAsString());
   }

api/src/main/java/io/kafbat/ui/mapper/ConsumerGroupMapper.java

@@ -97,23 +97,15 @@ private static BrokerDTO mapCoordinator(Node node) {
     return new BrokerDTO().host(node.host()).id(node.id()).port(node.port());
   }
 
-  private static ConsumerGroupStateDTO mapConsumerGroupState(
-      org.apache.kafka.common.ConsumerGroupState state) {
-    switch (state) {
-      case DEAD:
-        return ConsumerGroupStateDTO.DEAD;
-      case EMPTY:
-        return ConsumerGroupStateDTO.EMPTY;
-      case STABLE:
-        return ConsumerGroupStateDTO.STABLE;
-      case PREPARING_REBALANCE:
-        return ConsumerGroupStateDTO.PREPARING_REBALANCE;
-      case COMPLETING_REBALANCE:
-        return ConsumerGroupStateDTO.COMPLETING_REBALANCE;
-      default:
-        return ConsumerGroupStateDTO.UNKNOWN;
-    }
+  private static ConsumerGroupStateDTO mapConsumerGroupState(org.apache.kafka.common.ConsumerGroupState state) {
+    return switch (state) {
+      case DEAD -> ConsumerGroupStateDTO.DEAD;
+      case EMPTY -> ConsumerGroupStateDTO.EMPTY;
+      case STABLE -> ConsumerGroupStateDTO.STABLE;
+      case PREPARING_REBALANCE -> ConsumerGroupStateDTO.PREPARING_REBALANCE;
+      case COMPLETING_REBALANCE -> ConsumerGroupStateDTO.COMPLETING_REBALANCE;
+      default -> ConsumerGroupStateDTO.UNKNOWN;
+    };
   }
 
-
 }

api/src/main/java/io/kafbat/ui/mapper/DescribeLogDirsMapper.java

@@ -42,7 +42,7 @@ private BrokersLogdirsDTO toBrokerLogDirs(Integer broker, String dirName,
 
   private BrokerTopicLogdirsDTO toTopicLogDirs(Integer broker, String name,
                                                List<Map.Entry<TopicPartition,
-                                                   DescribeLogDirsResponse.ReplicaInfo>> partitions) {
+                                               DescribeLogDirsResponse.ReplicaInfo>> partitions) {
     BrokerTopicLogdirsDTO topic = new BrokerTopicLogdirsDTO();
     topic.setName(name);
     topic.setPartitions(
@@ -54,8 +54,7 @@ private BrokerTopicLogdirsDTO toTopicLogDirs(Integer broker, String name,
   }
 
   private BrokerTopicPartitionLogdirDTO topicPartitionLogDir(Integer broker, Integer partition,
-                                                             DescribeLogDirsResponse.ReplicaInfo
-                                                                 replicaInfo) {
+                                                             DescribeLogDirsResponse.ReplicaInfo replicaInfo) {
     BrokerTopicPartitionLogdirDTO logDir = new BrokerTopicPartitionLogdirDTO();
     logDir.setBroker(broker);
     logDir.setPartition(partition);

api/src/main/java/io/kafbat/ui/serdes/SerdeInstance.java

@@ -97,7 +97,7 @@ public void close() {
       try {
         serde.close();
       } catch (Exception e) {
-        log.error("Error closing serde " + name, e);
+        log.error("Error closing serde {}", name, e);
       }
       return null;
     });

api/src/main/java/io/kafbat/ui/serdes/builtin/Base64Serde.java

@@ -40,7 +40,7 @@ public Serde.Serializer serializer(String topic, Serde.Target type) {
     return inputString -> {
       inputString = inputString.trim();
       // it is actually a hack to provide ability to sent empty array as a key/value
-      if (inputString.length() == 0) {
+      if (inputString.isEmpty()) {
         return new byte[] {};
       }
       return decoder.decode(inputString);

api/src/main/java/io/kafbat/ui/serdes/builtin/HexSerde.java

@@ -62,7 +62,7 @@ public Serializer serializer(String topic, Target type) {
     return input -> {
       input = input.trim();
       // it is a hack to provide ability to sent empty array as a key/value
-      if (input.length() == 0) {
+      if (input.isEmpty()) {
         return new byte[] {};
       }
       return HexFormat.of().parseHex(prepareInputForParse(input));

api/src/main/java/io/kafbat/ui/serdes/builtin/ProtobufFileSerde.java

@@ -380,7 +380,7 @@ private Map<String, ProtoFile> knownProtoFiles() {
     }
 
     private ProtoFile loadKnownProtoFile(String path, Descriptors.FileDescriptor fileDescriptor) {
-      String protoFileString = null;
+      String protoFileString;
       // know type file contains either message or enum
       if (!fileDescriptor.getMessageTypes().isEmpty()) {
         protoFileString = new ProtobufSchema(fileDescriptor.getMessageTypes().get(0)).canonicalString();

api/src/main/java/io/kafbat/ui/service/KafkaConnectService.java

@@ -1,6 +1,5 @@
 package io.kafbat.ui.service;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import io.kafbat.ui.connect.api.KafkaConnectClientApi;
 import io.kafbat.ui.connect.model.ConnectorStatus;
 import io.kafbat.ui.connect.model.ConnectorStatusConnector;
@@ -44,7 +43,6 @@
 public class KafkaConnectService {
   private final ClusterMapper clusterMapper;
   private final KafkaConnectMapper kafkaConnectMapper;
-  private final ObjectMapper objectMapper;
   private final KafkaConfigSanitizer kafkaConfigSanitizer;
 
   public Flux<ConnectDTO> getConnects(KafkaCluster cluster) {

api/src/main/java/io/kafbat/ui/service/ReactiveAdminClient.java

@@ -389,12 +389,6 @@ static <K, V> Mono<Map<K, V>> toMonoWithExceptionFilter(Map<K, KafkaFuture<V>> v
     );
   }
 
-  public Mono<Map<Integer, Map<String, DescribeLogDirsResponse.LogDirInfo>>> describeLogDirs() {
-    return describeCluster()
-        .map(d -> d.getNodes().stream().map(Node::id).collect(toList()))
-        .flatMap(this::describeLogDirs);
-  }
-
   public Mono<Map<Integer, Map<String, DescribeLogDirsResponse.LogDirInfo>>> describeLogDirs(
       Collection<Integer> brokerIds) {
     return toMono(client.describeLogDirs(brokerIds).all())

api/src/main/java/io/kafbat/ui/service/SchemaRegistryService.java

@@ -63,7 +63,7 @@ public Mono<List<String>> getAllSubjectNames(KafkaCluster cluster) {
   @SneakyThrows
   private List<String> parseSubjectListString(String subjectNamesStr) {
     //workaround for https://github.com/spring-projects/spring-framework/issues/24734
-    return new JsonMapper().readValue(subjectNamesStr, new TypeReference<List<String>>() {
+    return new JsonMapper().readValue(subjectNamesStr, new TypeReference<>() {
     });
   }
 

api/src/main/java/io/kafbat/ui/service/TopicsService.java

@@ -97,7 +97,7 @@ private Mono<InternalTopic> loadTopic(KafkaCluster c, String topicName) {
 
   /**
    *  After creation topic can be invisible via API for some time.
-   *  To workaround this, we retyring topic loading until it becomes visible.
+   *  To workaround this, we're retrying topic loading until it becomes visible.
    */
   private Mono<InternalTopic> loadTopicAfterCreation(KafkaCluster c, String topicName) {
     return loadTopic(c, topicName)
@@ -137,8 +137,7 @@ private List<InternalTopic> createList(List<String> orderedNames,
         .collect(toList());
   }
 
-  private Mono<InternalPartitionsOffsets> getPartitionOffsets(Map<String, TopicDescription>
-                                                                  descriptionsMap,
+  private Mono<InternalPartitionsOffsets> getPartitionOffsets(Map<String, TopicDescription> descriptionsMap,
                                                               ReactiveAdminClient ac) {
     var descriptions = descriptionsMap.values();
     return ac.listOffsets(descriptions, OffsetSpec.earliest())
@@ -225,8 +224,7 @@ private Mono<InternalTopic> updateTopic(KafkaCluster cluster,
                 .then(loadTopic(cluster, topicName)));
   }
 
-  public Mono<InternalTopic> updateTopic(KafkaCluster cl, String topicName,
-                                    Mono<TopicUpdateDTO> topicUpdate) {
+  public Mono<InternalTopic> updateTopic(KafkaCluster cl, String topicName, Mono<TopicUpdateDTO> topicUpdate) {
     return topicUpdate
         .flatMap(t -> updateTopic(cl, topicName, t));
   }
@@ -298,7 +296,7 @@ private Map<TopicPartition, Optional<NewPartitionReassignment>> getPartitionsRea
         var brokers = brokersUsage.entrySet().stream()
             .sorted(Map.Entry.comparingByValue())
             .map(Map.Entry::getKey)
-            .collect(toList());
+            .toList();
 
         // Iterate brokers and try to add them in assignment
         // while partition replicas count != requested replication factor
@@ -326,7 +324,7 @@ private Map<TopicPartition, Optional<NewPartitionReassignment>> getPartitionsRea
         var brokersUsageList = brokersUsage.entrySet().stream()
             .sorted(Map.Entry.comparingByValue(Comparator.reverseOrder()))
             .map(Map.Entry::getKey)
-            .collect(toList());
+            .toList();
 
         // Iterate brokers and try to remove them from assignment
         // while partition replicas count != requested replication factor