#163 Kafka connect crud (#182)

* - added kafka connect to docker-compose files
- added kafka connect property to application

* - added /connectors endpoint
- added /connectors/{name} endpoint

* - added /connectors/{name}/(restart/pause/resume) endpoints
- updated connector config model
- added FileStream connectors configs

* - added /connectors post endpoint

* - added all other kafka connect endpoints
- reverted config file

* - moved kafka connect related endpoints to separate tag/controller

* - added kafka connect container
- added simple test for kafka connect service
- added assertj dependency

* - added tests for KafkaConnectService

* - added more tests
- moved kafkaConnect rest client calls to separate class
- added validation

* - removed additional validation
- removed Client class
- removed client test and replaced with proper integration test
- added retries

* - cleanup

* moved to using generated kafka connect client

* updated rest schema

* added new maven clean plugin configuration so it deletes generated sources in kafka-ui-react-app/src directory

* changed restart/pause/resume action schema

* - added test
- refactoring

* added more error handling

* added more tests for error handling

* fixed schema registry tests

* changed /connect to /connects

* - fixed mutating connector object during getConnector request
- added new retrying kafka connect client with common retry logic
- fixed dependency scope

* - removed unnecessary `.cache()`

* - reverted testcontainers initialization code

* - added missing UNASSIGNED status to response enum

* - fixed configurations
- fixed testcontainers lifecycle management

* fixed application-local.yml

docker/kafka-clusters-only.yaml

@@ -88,6 +88,32 @@ services:
     ports:
     - 8081:8081
 
+  kafka-connect0:
+    image: confluentinc/cp-kafka-connect:5.1.0
+    ports:
+      - 8083:8083
+    depends_on:
+      - kafka0
+      - schemaregistry0
+    environment:
+      CONNECT_BOOTSTRAP_SERVERS: kafka0:29092
+      CONNECT_GROUP_ID: compose-connect-group
+      CONNECT_CONFIG_STORAGE_TOPIC: _connect_configs
+      CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_OFFSET_STORAGE_TOPIC: _connect_offset
+      CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_STATUS_STORAGE_TOPIC: _connect_status
+      CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter
+      CONNECT_KEY_CONVERTER_SCHEMA_REGISTRY_URL: http://schemaregistry0:8085
+      CONNECT_VALUE_CONVERTER: org.apache.kafka.connect.storage.StringConverter
+      CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schemaregistry0:8085
+      CONNECT_INTERNAL_KEY_CONVERTER: org.apache.kafka.connect.json.JsonConverter
+      CONNECT_INTERNAL_VALUE_CONVERTER: org.apache.kafka.connect.json.JsonConverter
+      CONNECT_REST_ADVERTISED_HOST_NAME: kafka-connect0
+      CONNECT_PLUGIN_PATH: "/usr/share/java,/usr/share/confluent-hub-components"
+
+
   kafka-init-topics:
     image: confluentinc/cp-kafka:5.1.0
     volumes:
@@ -98,4 +124,5 @@ services:
                cub kafka-ready -b kafka1:29092 1 30 && \
                kafka-topics --create --topic second.users --partitions 3 --replication-factor 1 --if-not-exists --zookeeper zookeeper1:2181 && \
                kafka-topics --create --topic second.messages --partitions 2 --replication-factor 1 --if-not-exists --zookeeper zookeeper1:2181 && \
+               kafka-topics --create --topic first.messages --partitions 2 --replication-factor 1 --if-not-exists --zookeeper zookeeper0:2181 && \
                kafka-console-producer --broker-list kafka1:29092 -topic second.users < /data/message.json'"

docker/kafka-ui.yaml

@@ -13,17 +13,22 @@ services:
       - kafka0
       - kafka1
       - schemaregistry0
+      - kafka-connect0
     environment:
       KAFKA_CLUSTERS_0_NAME: local
       KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: kafka0:29092
       KAFKA_CLUSTERS_0_ZOOKEEPER: zookeeper0:2181
       KAFKA_CLUSTERS_0_JMXPORT: 9997
       KAFKA_CLUSTERS_0_SCHEMAREGISTRY: http://schemaregistry0:8085
+      KAFKA_CLUSTERS_0_KAFKACONNECT_0_NAME: first
+      KAFKA_CLUSTERS_0_KAFKACONNECT_0_ADDRESS: http://kafka-connect0:8083
       KAFKA_CLUSTERS_1_NAME: secondLocal
       KAFKA_CLUSTERS_1_BOOTSTRAPSERVERS: kafka1:29092
       KAFKA_CLUSTERS_1_ZOOKEEPER: zookeeper1:2181
       KAFKA_CLUSTERS_1_JMXPORT: 9998
       KAFKA_CLUSTERS_1_SCHEMAREGISTRY: http://schemaregistry0:8085
+      KAFKA_CLUSTERS_1_KAFKACONNECT_0_NAME: first
+      KAFKA_CLUSTERS_1_KAFKACONNECT_0_ADDRESS: http://kafka-connect0:8083
 
   zookeeper0:
     image: confluentinc/cp-zookeeper:5.1.0
@@ -91,6 +96,31 @@ services:
       SCHEMA_REGISTRY_LOG4J_ROOT_LOGLEVEL: INFO
       SCHEMA_REGISTRY_KAFKASTORE_TOPIC: _schemas
 
+  kafka-connect0:
+    image: confluentinc/cp-kafka-connect:5.1.0
+    ports:
+      - 8083:8083
+    depends_on:
+      - kafka0
+      - schemaregistry0
+    environment:
+      CONNECT_BOOTSTRAP_SERVERS: kafka0:29092
+      CONNECT_GROUP_ID: compose-connect-group
+      CONNECT_CONFIG_STORAGE_TOPIC: _connect_configs
+      CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_OFFSET_STORAGE_TOPIC: _connect_offset
+      CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_STATUS_STORAGE_TOPIC: _connect_status
+      CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: 1
+      CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter
+      CONNECT_KEY_CONVERTER_SCHEMA_REGISTRY_URL: http://schemaregistry0:8085
+      CONNECT_VALUE_CONVERTER: org.apache.kafka.connect.storage.StringConverter
+      CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schemaregistry0:8085
+      CONNECT_INTERNAL_KEY_CONVERTER: org.apache.kafka.connect.json.JsonConverter
+      CONNECT_INTERNAL_VALUE_CONVERTER: org.apache.kafka.connect.json.JsonConverter
+      CONNECT_REST_ADVERTISED_HOST_NAME: kafka-connect0
+      CONNECT_PLUGIN_PATH: "/usr/share/java,/usr/share/confluent-hub-components"
+
   kafka-init-topics:
     image: confluentinc/cp-kafka:5.1.0
     volumes:
@@ -101,4 +131,5 @@ services:
                cub kafka-ready -b kafka1:29092 1 30 && \
                kafka-topics --create --topic second.users --partitions 3 --replication-factor 1 --if-not-exists --zookeeper zookeeper1:2181 && \
                kafka-topics --create --topic second.messages --partitions 2 --replication-factor 1 --if-not-exists --zookeeper zookeeper1:2181 && \
+               kafka-topics --create --topic first.messages --partitions 2 --replication-factor 1 --if-not-exists --zookeeper zookeeper0:2181 && \
                kafka-console-producer --broker-list kafka1:29092 -topic second.users < /data/message.json'"

kafka-ui-api/pom.xml

@@ -103,6 +103,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-log4j2</artifactId>
         </dependency>
+        <dependency>
+            <groupId>io.projectreactor.addons</groupId>
+            <artifactId>reactor-extra</artifactId>
+        </dependency>
 
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -164,8 +168,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>${maven-compiler-plugin.version}</version>
                 <configuration>
-                    <source>13</source>
-                    <target>13</target>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
                     <annotationProcessorPaths>
                         <path>
                             <groupId>org.mapstruct</groupId>
@@ -185,6 +189,16 @@
                     </annotationProcessorPaths>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
+                <configuration>
+                    <argLine>
+                        --illegal-access=permit
+                    </argLine>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/client/KafkaConnectClients.java

@@ -0,0 +1,15 @@
+package com.provectus.kafka.ui.cluster.client;
+
+import com.provectus.kafka.ui.connect.api.ConnectApi;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public final class KafkaConnectClients {
+
+    private static final Map<String, ConnectApi> CACHE = new ConcurrentHashMap<>();
+
+    public static ConnectApi withBaseUrl(String basePath) {
+        return CACHE.computeIfAbsent(basePath, RetryingKafkaConnectClient::new);
+    }
+}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/client/RetryingKafkaConnectClient.java

@@ -0,0 +1,87 @@
+package com.provectus.kafka.ui.cluster.client;
+
+import com.provectus.kafka.ui.cluster.exception.RebalanceInProgressException;
+import com.provectus.kafka.ui.cluster.exception.ValidationException;
+import com.provectus.kafka.ui.connect.ApiClient;
+import com.provectus.kafka.ui.connect.api.ConnectApi;
+import com.provectus.kafka.ui.connect.model.Connector;
+import com.provectus.kafka.ui.connect.model.NewConnector;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.RestClientException;
+import org.springframework.web.reactive.function.client.WebClientResponseException;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.retry.Retry;
+
+import java.util.List;
+import java.util.Map;
+
+@Log4j2
+public class RetryingKafkaConnectClient extends ConnectApi {
+    private static final int MAX_RETRIES = 5;
+
+    public RetryingKafkaConnectClient(String basePath) {
+        super(new RetryingApiClient().setBasePath(basePath));
+    }
+
+    @Override
+    public Mono<Connector> createConnector(NewConnector newConnector) throws RestClientException {
+        return withBadRequestErrorHandling(
+                super.createConnector(newConnector)
+        );
+    }
+
+    @Override
+    public Mono<Connector> setConnectorConfig(String connectorName, Map<String, Object> requestBody) throws RestClientException {
+        return withBadRequestErrorHandling(
+                super.setConnectorConfig(connectorName, requestBody)
+        );
+    }
+
+    private static class RetryingApiClient extends ApiClient {
+        @Override
+        public <T> Mono<T> invokeAPI(String path, HttpMethod method, Map<String, Object> pathParams, MultiValueMap<String, String> queryParams, Object body, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams, MultiValueMap<String, Object> formParams, List<MediaType> accept, MediaType contentType, String[] authNames, ParameterizedTypeReference<T> returnType) throws RestClientException {
+            return withRetryOnConflict(
+                    super.invokeAPI(path, method, pathParams, queryParams, body, headerParams, cookieParams, formParams, accept, contentType, authNames, returnType)
+            );
+        }
+
+        @Override
+        public <T> Flux<T> invokeFluxAPI(String path, HttpMethod method, Map<String, Object> pathParams, MultiValueMap<String, String> queryParams, Object body, HttpHeaders headerParams, MultiValueMap<String, String> cookieParams, MultiValueMap<String, Object> formParams, List<MediaType> accept, MediaType contentType, String[] authNames, ParameterizedTypeReference<T> returnType) throws RestClientException {
+            return withRetryOnConflict(
+                    super.invokeFluxAPI(path, method, pathParams, queryParams, body, headerParams, cookieParams, formParams, accept, contentType, authNames, returnType)
+            );
+        }
+    }
+
+    private static <T> Mono<T> withRetryOnConflict(Mono<T> publisher) {
+        return publisher.retryWhen(
+                Retry.onlyIf(e -> e.exception() instanceof WebClientResponseException.Conflict)
+                        .retryMax(MAX_RETRIES)
+        )
+                .onErrorResume(WebClientResponseException.Conflict.class, e -> Mono.error(new RebalanceInProgressException()))
+                .doOnError(log::error);
+    }
+
+    private static <T> Flux<T> withRetryOnConflict(Flux<T> publisher) {
+        return publisher.retryWhen(
+                Retry.onlyIf(e -> e.exception() instanceof WebClientResponseException.Conflict)
+                        .retryMax(MAX_RETRIES)
+        )
+                .onErrorResume(WebClientResponseException.Conflict.class, e -> Mono.error(new RebalanceInProgressException()))
+                .doOnError(log::error);
+    }
+
+    private static <T> Mono<T> withBadRequestErrorHandling(Mono<T> publisher) {
+        return publisher
+                .onErrorResume(WebClientResponseException.BadRequest.class, e ->
+                        Mono.error(new ValidationException("Invalid configuration")))
+                .onErrorResume(WebClientResponseException.InternalServerError.class, e ->
+                        Mono.error(new ValidationException("Invalid configuration")));
+    }
+}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/config/ClustersProperties.java

@@ -24,7 +24,14 @@ public class ClustersProperties {
         String schemaNameTemplate = "%s-value";
         String protobufFile;
         String protobufMessageName;
+        List<ConnectCluster> kafkaConnect;
         int jmxPort;
         Properties properties;
     }
+
+    @Data
+    public static class ConnectCluster {
+        String name;
+        String address;
+    }
 }

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/exception/RebalanceInProgressException.java

@@ -0,0 +1,15 @@
+package com.provectus.kafka.ui.cluster.exception;
+
+import org.springframework.http.HttpStatus;
+
+public class RebalanceInProgressException extends CustomBaseException {
+
+    public RebalanceInProgressException() {
+        super("Rebalance is in progress.");
+    }
+
+    @Override
+    public HttpStatus getResponseStatusCode() {
+        return HttpStatus.CONFLICT;
+    }
+}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/exception/ValidationException.java

@@ -0,0 +1,14 @@
+package com.provectus.kafka.ui.cluster.exception;
+
+import org.springframework.http.HttpStatus;
+
+public class ValidationException extends CustomBaseException {
+    public ValidationException(String message) {
+        super(message);
+    }
+
+    @Override
+    public HttpStatus getResponseStatusCode() {
+        return HttpStatus.BAD_REQUEST;
+    }
+}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/mapper/ClusterMapper.java

@@ -36,6 +36,7 @@ public interface ClusterMapper {
     TopicDetails toTopicDetails(InternalTopic topic);
     TopicConfig toTopicConfig(InternalTopicConfig topic);
     Replica toReplica(InternalReplica replica);
+    Connect toKafkaConnect(KafkaConnectCluster connect);
 
     @Mapping(target = "isCompatible", source = "compatible")
     CompatibilityCheckResponse toCompatibilityCheckResponse(InternalCompatibilityCheck dto);

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/mapper/KafkaConnectMapper.java

@@ -0,0 +1,24 @@
+package com.provectus.kafka.ui.cluster.mapper;
+
+import com.provectus.kafka.ui.connect.model.ConnectorStatusConnector;
+import com.provectus.kafka.ui.connect.model.ConnectorTask;
+import com.provectus.kafka.ui.connect.model.NewConnector;
+import com.provectus.kafka.ui.model.*;
+import org.mapstruct.Mapper;
+
+@Mapper(componentModel = "spring")
+public interface KafkaConnectMapper {
+    NewConnector toClient(com.provectus.kafka.ui.model.NewConnector newConnector);
+
+    Connector fromClient(com.provectus.kafka.ui.connect.model.Connector connector);
+
+    ConnectorStatus fromClient(ConnectorStatusConnector connectorStatus);
+
+    Task fromClient(ConnectorTask connectorTask);
+
+    TaskStatus fromClient(com.provectus.kafka.ui.connect.model.TaskStatus taskStatus);
+
+    ConnectorPlugin fromClient(com.provectus.kafka.ui.connect.model.ConnectorPlugin connectorPlugin);
+
+    ConnectorPluginConfigValidationResponse fromClient(com.provectus.kafka.ui.connect.model.ConnectorPluginConfigValidationResponse connectorPluginConfigValidationResponse);
+}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/model/KafkaCluster.java

@@ -1,6 +1,8 @@
 package com.provectus.kafka.ui.cluster.model;
 
 import com.provectus.kafka.ui.model.ServerStatus;
+
+import java.util.List;
 import java.util.Properties;
 import lombok.Builder;
 import lombok.Data;
@@ -16,6 +18,7 @@ public class KafkaCluster {
     private final String bootstrapServers;
     private final String zookeeper;
     private final String schemaRegistry;
+    private final List<KafkaConnectCluster> kafkaConnect;
     private final String schemaNameTemplate;
     private final ServerStatus status;
     private final ServerStatus zookeeperStatus;

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/model/KafkaConnectCluster.java

@@ -0,0 +1,11 @@
+package com.provectus.kafka.ui.cluster.model;
+
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder(toBuilder = true)
+public class KafkaConnectCluster {
+    private final String name;
+    private final String address;
+}

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

@@ -0,0 +1,183 @@
+package com.provectus.kafka.ui.cluster.service;
+
+import com.provectus.kafka.ui.cluster.client.KafkaConnectClients;
+import com.provectus.kafka.ui.cluster.exception.NotFoundException;
+import com.provectus.kafka.ui.cluster.mapper.ClusterMapper;
+import com.provectus.kafka.ui.cluster.mapper.KafkaConnectMapper;
+import com.provectus.kafka.ui.cluster.model.ClustersStorage;
+import com.provectus.kafka.ui.cluster.model.KafkaCluster;
+import com.provectus.kafka.ui.cluster.model.KafkaConnectCluster;
+import com.provectus.kafka.ui.model.*;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+@Service
+@Log4j2
+@RequiredArgsConstructor
+public class KafkaConnectService {
+    private final ClustersStorage clustersStorage;
+    private final ClusterMapper clusterMapper;
+    private final KafkaConnectMapper kafkaConnectMapper;
+
+    public Mono<Flux<Connect>> getConnects(String clusterName) {
+        return Mono.just(
+                Flux.fromIterable(clustersStorage.getClusterByName(clusterName)
+                        .map(KafkaCluster::getKafkaConnect).stream()
+                        .flatMap(Collection::stream)
+                        .map(clusterMapper::toKafkaConnect)
+                        .collect(Collectors.toList())
+                )
+        );
+    }
+
+
+    public Flux<String> getConnectors(String clusterName, String connectName) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMapMany(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).getConnectors()
+                                .doOnError(log::error)
+                );
+    }
+
+    public Mono<Connector> createConnector(String clusterName, String connectName, Mono<NewConnector> connector) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        connector
+                                .map(kafkaConnectMapper::toClient)
+                                .flatMap(c ->
+                                        KafkaConnectClients.withBaseUrl(connect).createConnector(c)
+                                )
+                                .flatMap(c -> getConnector(clusterName, connectName, c.getName()))
+                );
+    }
+
+    public Mono<Connector> getConnector(String clusterName, String connectName, String connectorName) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).getConnector(connectorName)
+                                .map(kafkaConnectMapper::fromClient)
+                                .flatMap(connector ->
+                                        KafkaConnectClients.withBaseUrl(connect).getConnectorStatus(connector.getName())
+                                                .map(connectorStatus -> {
+                                                    var status = connectorStatus.getConnector();
+                                                    connector.status(kafkaConnectMapper.fromClient(status));
+                                                    return (Connector) new Connector()
+                                                            .status(kafkaConnectMapper.fromClient(status))
+                                                            .type(connector.getType())
+                                                            .tasks(connector.getTasks())
+                                                            .name(connector.getName())
+                                                            .config(connector.getConfig());
+                                                })
+                                )
+                );
+    }
+
+    public Mono<Map<String, Object>> getConnectorConfig(String clusterName, String connectName, String connectorName) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).getConnectorConfig(connectorName)
+                );
+    }
+
+    public Mono<Connector> setConnectorConfig(String clusterName, String connectName, String connectorName, Mono<Object> requestBody) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        requestBody.flatMap(body ->
+                                KafkaConnectClients.withBaseUrl(connect).setConnectorConfig(connectorName, (Map<String, Object>) body)
+                        )
+                                .map(kafkaConnectMapper::fromClient)
+                );
+    }
+
+    public Mono<Void> deleteConnector(String clusterName, String connectName, String connectorName) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).deleteConnector(connectorName)
+                );
+    }
+
+    public Mono<Void> updateConnectorState(String clusterName, String connectName, String connectorName, ConnectorAction action) {
+        Function<String, Mono<Void>> kafkaClientCall;
+        switch (action) {
+            case RESTART:
+                kafkaClientCall = connect -> KafkaConnectClients.withBaseUrl(connect).restartConnector(connectorName);
+                break;
+            case PAUSE:
+                kafkaClientCall = connect -> KafkaConnectClients.withBaseUrl(connect).pauseConnector(connectorName);
+                break;
+            case RESUME:
+                kafkaClientCall = connect -> KafkaConnectClients.withBaseUrl(connect).resumeConnector(connectorName);
+                break;
+            default:
+                throw new IllegalStateException("Unexpected value: " + action);
+        }
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(kafkaClientCall);
+    }
+
+    public Flux<Task> getConnectorTasks(String clusterName, String connectName, String connectorName) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMapMany(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).getConnectorTasks(connectorName)
+                                .map(kafkaConnectMapper::fromClient)
+                                .flatMap(task ->
+                                        KafkaConnectClients.withBaseUrl(connect).getConnectorTaskStatus(connectorName, task.getId().getTask())
+                                                .map(kafkaConnectMapper::fromClient)
+                                                .map(task::status)
+                                )
+                );
+    }
+
+    public Mono<Void> restartConnectorTask(String clusterName, String connectName, String connectorName, Integer taskId) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).restartConnectorTask(connectorName, taskId)
+                );
+    }
+
+    public Mono<Flux<ConnectorPlugin>> getConnectorPlugins(String clusterName, String connectName) {
+        return Mono.just(getConnectAddress(clusterName, connectName)
+                .flatMapMany(connect ->
+                        KafkaConnectClients.withBaseUrl(connect).getConnectorPlugins()
+                                .map(kafkaConnectMapper::fromClient)
+                ));
+    }
+
+    public Mono<ConnectorPluginConfigValidationResponse> validateConnectorPluginConfig(String clusterName, String connectName, String pluginName, Mono<Object> requestBody) {
+        return getConnectAddress(clusterName, connectName)
+                .flatMap(connect ->
+                        requestBody.flatMap(body ->
+                                KafkaConnectClients.withBaseUrl(connect).validateConnectorPluginConfig(pluginName, (Map<String, Object>) body)
+                        )
+                                .map(kafkaConnectMapper::fromClient)
+                );
+    }
+
+    private Mono<KafkaCluster> getCluster(String clusterName) {
+        return clustersStorage.getClusterByName(clusterName)
+                .map(Mono::just)
+                .orElse(Mono.error(new NotFoundException("No such cluster")));
+    }
+
+    private Mono<String> getConnectAddress(String clusterName, String connectName) {
+        return getCluster(clusterName)
+                .map(kafkaCluster ->
+                        kafkaCluster.getKafkaConnect().stream()
+                                .filter(connect -> connect.getName().equals(connectName))
+                                .findFirst()
+                                .map(KafkaConnectCluster::getAddress)
+                )
+                .flatMap(connect -> connect
+                        .map(Mono::just)
+                        .orElse(Mono.error(new NotFoundException("No such connect cluster")))
+                );
+    }
+}

kafka-ui-api/src/main/java/com/provectus/kafka/ui/rest/KafkaConnectRestController.java

@@ -0,0 +1,92 @@
+package com.provectus.kafka.ui.rest;
+
+import com.provectus.kafka.ui.api.ApiClustersConnectsApi;
+import com.provectus.kafka.ui.cluster.service.KafkaConnectService;
+import com.provectus.kafka.ui.model.*;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.server.ServerWebExchange;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+import javax.validation.Valid;
+import java.util.Map;
+
+@RestController
+@RequiredArgsConstructor
+@Log4j2
+public class KafkaConnectRestController implements ApiClustersConnectsApi {
+    private final KafkaConnectService kafkaConnectService;
+
+    @Override
+    public Mono<ResponseEntity<Flux<Connect>>> getConnects(String clusterName, ServerWebExchange exchange) {
+        return kafkaConnectService.getConnects(clusterName).map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Flux<String>>> getConnectors(String clusterName, String connectName, ServerWebExchange exchange) {
+        Flux<String> connectors = kafkaConnectService.getConnectors(clusterName, connectName);
+        return Mono.just(ResponseEntity.ok(connectors));
+    }
+
+    @Override
+    public Mono<ResponseEntity<Connector>> createConnector(String clusterName, String connectName, @Valid Mono<NewConnector> connector, ServerWebExchange exchange) {
+        return kafkaConnectService.createConnector(clusterName, connectName, connector)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Connector>> getConnector(String clusterName, String connectName, String connectorName, ServerWebExchange exchange) {
+        return kafkaConnectService.getConnector(clusterName, connectName, connectorName)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Void>> deleteConnector(String clusterName, String connectName, String connectorName, ServerWebExchange exchange) {
+        return kafkaConnectService.deleteConnector(clusterName, connectName, connectorName)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Map<String, Object>>> getConnectorConfig(String clusterName, String connectName, String connectorName, ServerWebExchange exchange) {
+        return kafkaConnectService.getConnectorConfig(clusterName, connectName, connectorName)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Connector>> setConnectorConfig(String clusterName, String connectName, String connectorName, @Valid Mono<Object> requestBody, ServerWebExchange exchange) {
+        return kafkaConnectService.setConnectorConfig(clusterName, connectName, connectorName, requestBody)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Void>> updateConnectorState(String clusterName, String connectName, String connectorName, ConnectorAction action, ServerWebExchange exchange) {
+        return kafkaConnectService.updateConnectorState(clusterName, connectName, connectorName, action)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Flux<Task>>> getConnectorTasks(String clusterName, String connectName, String connectorName, ServerWebExchange exchange) {
+        return Mono.just(ResponseEntity.ok(kafkaConnectService.getConnectorTasks(clusterName, connectName, connectorName)));
+    }
+
+    @Override
+    public Mono<ResponseEntity<Void>> restartConnectorTask(String clusterName, String connectName, String connectorName, Integer taskId, ServerWebExchange exchange) {
+        return kafkaConnectService.restartConnectorTask(clusterName, connectName, connectorName, taskId)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<Flux<ConnectorPlugin>>> getConnectorPlugins(String clusterName, String connectName, ServerWebExchange exchange) {
+        return kafkaConnectService.getConnectorPlugins(clusterName, connectName)
+                .map(ResponseEntity::ok);
+    }
+
+    @Override
+    public Mono<ResponseEntity<ConnectorPluginConfigValidationResponse>> validateConnectorPluginConfig(String clusterName, String connectName, String pluginName, @Valid Mono<Object> requestBody, ServerWebExchange exchange) {
+        return kafkaConnectService.validateConnectorPluginConfig(clusterName, connectName, pluginName, requestBody)
+                .map(ResponseEntity::ok);
+    }
+}

kafka-ui-api/src/main/resources/application-local.yml

@@ -5,13 +5,18 @@ kafka:
       bootstrapServers: localhost:9093
       zookeeper: localhost:2181
       schemaRegistry: http://localhost:8081
-#      schemaNameTemplate: "%s-value"
+      kafkaConnect:
+        - name: first
+          address: http://localhost:8083
       jmxPort: 9997
     -
       name: secondLocal
       bootstrapServers: localhost:9093
       zookeeper: localhost:2182
       schemaRegistry: http://localhost:8081
+      kafkaConnect:
+        - name: first
+          address: http://localhost:8083
       jmxPort: 9998
   admin-client-timeout: 5000
 zookeeper:

kafka-ui-api/src/test/java/com/provectus/kafka/ui/AbstractBaseTest.java

@@ -1,35 +1,60 @@
 package com.provectus.kafka.ui;
 
-import org.junit.runner.RunWith;
+import org.jetbrains.annotations.NotNull;
+import org.junit.jupiter.api.extension.ExtendWith;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ApplicationListener;
 import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.event.ContextClosedEvent;
 import org.springframework.test.context.ActiveProfiles;
-import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
 import org.testcontainers.containers.KafkaContainer;
 import org.testcontainers.containers.Network;
-import org.testcontainers.junit.jupiter.Container;
-import org.testcontainers.junit.jupiter.Testcontainers;
+import org.testcontainers.containers.wait.strategy.Wait;
 import org.testcontainers.utility.DockerImageName;
 
-@RunWith(SpringRunner.class)
+import java.time.Duration;
+
+@ExtendWith(SpringExtension.class)
 @SpringBootTest
 @ActiveProfiles("test")
-@Testcontainers
 public abstract class AbstractBaseTest {
-    @Container
-    public static KafkaContainer kafka = new KafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:5.2.1"))
-            .withNetwork(Network.SHARED);
-    @Container
-    public static SchemaRegistryContainer schemaRegistry = new SchemaRegistryContainer("5.2.1")
-            .withKafka(kafka)
-            .dependsOn(kafka);
 
     public static class Initializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+        public final KafkaContainer kafka = new KafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:5.2.1"))
+                .withNetwork(Network.SHARED);
+
+        public final SchemaRegistryContainer schemaRegistry = new SchemaRegistryContainer("5.2.1")
+                .withKafka(kafka)
+                .dependsOn(kafka);
+
+        public final KafkaConnectContainer kafkaConnect = new KafkaConnectContainer("5.2.1")
+                .withKafka(kafka)
+                .waitingFor(
+                        Wait.forLogMessage(".*Finished starting connectors and tasks.*", 1)
+                )
+                .dependsOn(kafka)
+                .dependsOn(schemaRegistry)
+                .withStartupTimeout(Duration.ofMinutes(15));
+
         @Override
-        public void initialize(ConfigurableApplicationContext context) {
+        public void initialize(@NotNull ConfigurableApplicationContext context) {
+            kafka.start();
+            schemaRegistry.start();
+            kafkaConnect.start();
+
             System.setProperty("kafka.clusters.0.name", "local");
+            System.setProperty("kafka.clusters.0.bootstrapServers", kafka.getBootstrapServers());
             System.setProperty("kafka.clusters.0.schemaRegistry", schemaRegistry.getTarget());
+            System.setProperty("kafka.clusters.0.kafkaConnect.0.name", "kafka-connect");
+            System.setProperty("kafka.clusters.0.kafkaConnect.0.address", kafkaConnect.getTarget());
+
+            context.addApplicationListener((ApplicationListener<ContextClosedEvent>) event -> {
+                kafkaConnect.close();
+                schemaRegistry.close();
+                kafka.close();
+            });
         }
     }
 }

kafka-ui-api/src/test/java/com/provectus/kafka/ui/KafkaConnectContainer.java

@@ -0,0 +1,42 @@
+package com.provectus.kafka.ui;
+
+import org.testcontainers.containers.GenericContainer;
+import org.testcontainers.containers.KafkaContainer;
+import org.testcontainers.containers.Network;
+
+public class KafkaConnectContainer extends GenericContainer<KafkaConnectContainer> {
+    private static final int CONNECT_PORT = 8083;
+
+    public KafkaConnectContainer(String version) {
+        super("confluentinc/cp-kafka-connect:" + version);
+    }
+
+
+    public KafkaConnectContainer withKafka(KafkaContainer kafka) {
+        String bootstrapServers = kafka.getNetworkAliases().get(0) + ":9092";
+        return withKafka(kafka.getNetwork(), bootstrapServers);
+    }
+
+    public KafkaConnectContainer withKafka(Network network, String bootstrapServers) {
+        withNetwork(network);
+        withEnv("CONNECT_BOOTSTRAP_SERVERS", "PLAINTEXT://" + bootstrapServers);
+        withEnv("CONNECT_GROUP_ID", "connect-group");
+        withEnv("CONNECT_CONFIG_STORAGE_TOPIC", "_connect_configs");
+        withEnv("CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR", "1");
+        withEnv("CONNECT_OFFSET_STORAGE_TOPIC", "_connect_offset");
+        withEnv("CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR", "1");
+        withEnv("CONNECT_STATUS_STORAGE_TOPIC", "_connect_status");
+        withEnv("CONNECT_STATUS_STORAGE_REPLICATION_FACTOR", "1");
+        withEnv("CONNECT_KEY_CONVERTER", "org.apache.kafka.connect.storage.StringConverter");
+        withEnv("CONNECT_VALUE_CONVERTER", "org.apache.kafka.connect.storage.StringConverter");
+        withEnv("CONNECT_INTERNAL_KEY_CONVERTER", "org.apache.kafka.connect.json.JsonConverter");
+        withEnv("CONNECT_INTERNAL_VALUE_CONVERTER", "org.apache.kafka.connect.json.JsonConverter");
+        withEnv("CONNECT_REST_ADVERTISED_HOST_NAME", "kafka-connect");
+        withEnv("CONNECT_PLUGIN_PATH", "/usr/share/java,/usr/share/confluent-hub-components");
+        return self();
+    }
+
+    public String getTarget() {
+        return "http://" + getContainerIpAddress() + ":" + getMappedPort(CONNECT_PORT);
+    }
+}

kafka-ui-api/src/test/java/com/provectus/kafka/ui/KafkaConnectServiceTests.java

@@ -0,0 +1,304 @@
+package com.provectus.kafka.ui;
+
+import com.provectus.kafka.ui.model.*;
+import lombok.extern.log4j.Log4j2;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+import static java.util.function.Predicate.not;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@ContextConfiguration(initializers = {AbstractBaseTest.Initializer.class})
+@Log4j2
+@AutoConfigureWebTestClient(timeout = "60000")
+public class KafkaConnectServiceTests extends AbstractBaseTest {
+    private final String clusterName = "local";
+    private final String connectName = "kafka-connect";
+    private final String connectorName = UUID.randomUUID().toString();
+    private final Map<String, Object> config = Map.of(
+            "name", connectorName,
+            "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+            "tasks.max", "1",
+            "topics", "output-topic",
+            "file", "/tmp/test"
+    );
+
+    @Autowired
+    private WebTestClient webTestClient;
+
+
+    @BeforeEach
+    public void setUp() {
+        webTestClient.post()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, connectName)
+                .bodyValue(new NewConnector()
+                        .name(connectorName)
+                        .config(Map.of(
+                                "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                                "tasks.max", "1",
+                                "topics", "output-topic",
+                                "file", "/tmp/test"
+                        ))
+                )
+                .exchange()
+                .expectStatus().isOk();
+    }
+
+    @AfterEach
+    public void tearDown() {
+        webTestClient.delete()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}", clusterName, connectName, connectorName)
+                .exchange()
+                .expectStatus().isOk();
+    }
+
+    @Test
+    public void shouldListConnectors() {
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, connectName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody()
+                .jsonPath(String.format("$[?(@ == '%s')]", connectorName))
+                .exists();
+    }
+
+    @Test
+    public void shouldReturnNotFoundForNonExistingCluster() {
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", "nonExistingCluster", connectName)
+                .exchange()
+                .expectStatus().isNotFound();
+    }
+
+    @Test
+    public void shouldReturnNotFoundForNonExistingConnectName() {
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, "nonExistingConnect")
+                .exchange()
+                .expectStatus().isNotFound();
+    }
+
+    @Test
+    public void shouldRetrieveConnector() {
+        Connector expected = (Connector) new Connector()
+                .status(new ConnectorStatus()
+                        .state(ConnectorStatus.StateEnum.RUNNING)
+                        .workerId("kafka-connect:8083"))
+                .tasks(List.of(new TaskId()
+                        .connector(connectorName)
+                        .task(0)))
+                .type(Connector.TypeEnum.SINK)
+                .name(connectorName)
+                .config(config);
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}", clusterName, connectName, connectorName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(Connector.class)
+                .value(connector -> assertEquals(expected, connector));
+    }
+
+    @Test
+    public void shouldUpdateConfig() {
+        webTestClient.put()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config", clusterName, connectName, connectorName)
+                .bodyValue(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "1",
+                        "topics", "another-topic",
+                        "file", "/tmp/new"
+                        )
+                )
+                .exchange()
+                .expectStatus().isOk();
+
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config", clusterName, connectName, connectorName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(new ParameterizedTypeReference<Map<String, Object>>() {
+                })
+                .isEqualTo(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "1",
+                        "topics", "another-topic",
+                        "file", "/tmp/new",
+                        "name", connectorName
+                ));
+    }
+
+    @Test
+    public void shouldReturn400WhenConnectReturns400ForInvalidConfigCreate() {
+        var connectorName = UUID.randomUUID().toString();
+        webTestClient.post()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, connectName)
+                .bodyValue(Map.of(
+                        "name", connectorName,
+                        "config", Map.of(
+                                "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                                "tasks.max", "invalid number",
+                                "topics", "another-topic",
+                                "file", "/tmp/test"
+                        ))
+                )
+                .exchange()
+                .expectStatus().isBadRequest();
+
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, connectName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody()
+                .jsonPath(String.format("$[?(@ == '%s')]", connectorName))
+                .doesNotExist();
+    }
+
+    @Test
+    public void shouldReturn400WhenConnectReturns500ForInvalidConfigCreate() {
+        var connectorName = UUID.randomUUID().toString();
+        webTestClient.post()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, connectName)
+                .bodyValue(Map.of(
+                        "name", connectorName,
+                        "config", Map.of(
+                                "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector"
+                        ))
+                )
+                .exchange()
+                .expectStatus().isBadRequest();
+
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors", clusterName, connectName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody()
+                .jsonPath(String.format("$[?(@ == '%s')]", connectorName))
+                .doesNotExist();
+    }
+
+
+    @Test
+    public void shouldReturn400WhenConnectReturns400ForInvalidConfigUpdate() {
+        webTestClient.put()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config", clusterName, connectName, connectorName)
+                .bodyValue(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "invalid number",
+                        "topics", "another-topic",
+                        "file", "/tmp/test"
+                        )
+                )
+                .exchange()
+                .expectStatus().isBadRequest();
+
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config", clusterName, connectName, connectorName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(new ParameterizedTypeReference<Map<String, Object>>() {
+                })
+                .isEqualTo(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "1",
+                        "topics", "output-topic",
+                        "file", "/tmp/test",
+                        "name", connectorName
+                ));
+    }
+
+    @Test
+    public void shouldReturn400WhenConnectReturns500ForInvalidConfigUpdate() {
+        webTestClient.put()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config", clusterName, connectName, connectorName)
+                .bodyValue(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector"
+                        )
+                )
+                .exchange()
+                .expectStatus().isBadRequest();
+
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config", clusterName, connectName, connectorName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(new ParameterizedTypeReference<Map<String, Object>>() {
+                })
+                .isEqualTo(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "1",
+                        "topics", "output-topic",
+                        "file", "/tmp/test",
+                        "name", connectorName
+                ));
+    }
+
+    @Test
+    public void shouldRetrieveConnectorPlugins() {
+        webTestClient.get()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/plugins", clusterName, connectName)
+                .exchange()
+                .expectStatus().isOk()
+                .expectBodyList(ConnectorPlugin.class)
+                .value(plugins -> assertEquals(13, plugins.size()));
+    }
+
+    @Test
+    public void shouldSuccessfullyValidateConnectorPluginConfiguration() {
+        var pluginName = "FileStreamSinkConnector";
+        webTestClient.put()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/plugins/{pluginName}/config/validate", clusterName, connectName, pluginName)
+                .bodyValue(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "1",
+                        "topics", "output-topic",
+                        "file", "/tmp/test",
+                        "name", connectorName
+                        )
+                )
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(ConnectorPluginConfigValidationResponse.class)
+                .value(response -> assertEquals(0, response.getErrorCount()));
+    }
+
+    @Test
+    public void shouldValidateAndReturnErrorsOfConnectorPluginConfiguration() {
+        var pluginName = "FileStreamSinkConnector";
+        webTestClient.put()
+                .uri("http://localhost:8080/api/clusters/{clusterName}/connects/{connectName}/plugins/{pluginName}/config/validate", clusterName, connectName, pluginName)
+                .bodyValue(Map.of(
+                        "connector.class", "org.apache.kafka.connect.file.FileStreamSinkConnector",
+                        "tasks.max", "0",
+                        "topics", "output-topic",
+                        "file", "/tmp/test",
+                        "name", connectorName
+                        )
+                )
+                .exchange()
+                .expectStatus().isOk()
+                .expectBody(ConnectorPluginConfigValidationResponse.class)
+                .value(response -> {
+                    assertEquals(1, response.getErrorCount());
+                    var error = response.getConfigs().stream()
+                            .map(ConnectorPluginConfig::getValue)
+                            .map(ConnectorPluginConfigValue::getErrors)
+                            .filter(not(List::isEmpty))
+                            .findFirst().get();
+                    assertEquals(
+                            "Invalid value 0 for configuration tasks.max: Value must be at least 1",
+                            error.get(0)
+                    );
+                });
+    }
+}

kafka-ui-api/src/test/java/com/provectus/kafka/ui/SchemaRegistryServiceTests.java

@@ -41,7 +41,7 @@ class SchemaRegistryServiceTests extends AbstractBaseTest {
     }
 
     @Test
-    void shouldReturn404WhenGetLatestSchemaByNonExistingSubject() {
+    public void shouldReturn404WhenGetLatestSchemaByNonExistingSubject() {
         String unknownSchema = "unknown-schema";
         webTestClient
                 .get()
@@ -51,7 +51,7 @@ class SchemaRegistryServiceTests extends AbstractBaseTest {
     }
 
     @Test
-    void shouldReturnBackwardAsGlobalCompatibilityLevelByDefault() {
+    public void shouldReturnBackwardAsGlobalCompatibilityLevelByDefault() {
         webTestClient
                 .get()
                 .uri("http://localhost:8080/api/clusters/local/schemas/compatibility")

kafka-ui-contract/pom.xml

@@ -33,6 +33,12 @@
                     <artifactId>jackson-databind-nullable</artifactId>
                     <version>${jackson-databind-nullable.version}</version>
                 </dependency>
+                <dependency>
+                    <groupId>com.google.code.findbugs</groupId>
+                    <artifactId>jsr305</artifactId>
+                    <version>3.0.2</version>
+                    <scope>provided</scope>
+                </dependency>
             </dependencies>
 
             <build>
@@ -91,12 +97,50 @@
                                     </configOptions>
                                 </configuration>
                             </execution>
+                            <execution>
+                                <id>generate-connect-client</id>
+                                <goals>
+                                    <goal>generate</goal>
+                                </goals>
+                                <configuration>
+                                    <inputSpec>${project.basedir}/src/main/resources/swagger/kafka-connect-api.yaml
+                                    </inputSpec>
+                                    <output>${project.build.directory}/generated-sources/kafka-connect-client</output>
+                                    <generatorName>java</generatorName>
+                                    <generateApiTests>false</generateApiTests>
+                                    <generateModelTests>false</generateModelTests>
+
+                                    <configOptions>
+                                        <modelPackage>com.provectus.kafka.ui.connect.model</modelPackage>
+                                        <apiPackage>com.provectus.kafka.ui.connect.api</apiPackage>
+                                        <sourceFolder>kafka-connect-client</sourceFolder>
+
+                                        <asyncNative>true</asyncNative>
+                                        <library>webclient</library>
+
+                                        <useBeanValidation>true</useBeanValidation>
+                                        <dateLibrary>java8</dateLibrary>
+                                    </configOptions>
+                                </configuration>
+                            </execution>
                         </executions>
                     </plugin>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-clean-plugin</artifactId>
+                        <version>${maven-clean-plugin.version}</version>
+                        <configuration>
+                            <filesets>
+                                <fileset>
+                                    <directory>${basedir}/${frontend-generated-sources-directory}</directory>
+                                </fileset>
+                            </filesets>
+                        </configuration>
+                    </plugin>
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-resources-plugin</artifactId>
-                        <version>3.1.0</version>
+                        <version>${maven-resources-plugin.version}</version>
                         <executions>
                             <execution>
                                 <id>copy-resource-one</id>
@@ -106,7 +150,7 @@
                                 </goals>
 
                                 <configuration>
-                                    <outputDirectory>${basedir}/..//kafka-ui-react-app/src/generated-sources</outputDirectory>
+                                    <outputDirectory>${basedir}/${frontend-generated-sources-directory}</outputDirectory>
                                     <resources>
                                         <resource>
                                             <directory>${project.build.directory}/generated-sources/frontend/</directory>

kafka-ui-contract/src/main/resources/swagger/kafka-connect-api.yaml

@@ -0,0 +1,501 @@
+openapi: 3.0.0
+info:
+  description: Api Documentation
+  version: 0.1.0
+  title: Api Documentation
+  termsOfService: urn:tos
+  contact: {}
+  license:
+    name: Apache 2.0
+    url: http://www.apache.org/licenses/LICENSE-2.0
+tags:
+  - name: /connect
+servers:
+  - url: /localhost
+
+paths:
+  /connectors:
+    get:
+      tags:
+        - /connect
+      summary: get all connectors from Kafka Connect service
+      operationId: getConnectors
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  type: string
+    post:
+      tags:
+        - /connect
+      summary: create new connector
+      operationId: createConnector
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/NewConnector'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Connector'
+        400:
+          description: Bad request
+        409:
+          description: rebalance is in progress
+        500:
+          description: Internal server error
+
+  /connectors/{connectorName}:
+    get:
+      tags:
+        - /connect
+      summary: get information about the connector
+      operationId: getConnector
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Connector'
+    delete:
+      tags:
+        - /connect
+      summary: delete connector
+      operationId: deleteConnector
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+        409:
+          description: rebalance is in progress
+
+  /connectors/{connectorName}/config:
+    get:
+      tags:
+        - /connect
+      summary: get connector configuration
+      operationId: getConnectorConfig
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ConnectorConfig'
+    put:
+      tags:
+        - /connect
+      summary: update or create connector with provided config
+      operationId: setConnectorConfig
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ConnectorConfig'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Connector'
+        400:
+          description: Bad request
+        409:
+          description: rebalance is in progress
+        500:
+          description: Internal server error
+
+
+  /connectors/{connectorName}/status:
+    get:
+      tags:
+        - /connect
+      summary: get connector status
+      operationId: getConnectorStatus
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ConnectorStatus'
+
+  /connectors/{connectorName}/restart:
+    post:
+      tags:
+        - /connect
+      summary: restart the connector
+      operationId: restartConnector
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+        409:
+          description: rebalance is in progress
+
+  /connectors/{connectorName}/pause:
+    put:
+      tags:
+        - /connect
+      summary: pause the connector
+      operationId: pauseConnector
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        202:
+          description: Accepted
+
+  /connectors/{connectorName}/resume:
+    put:
+      tags:
+        - /connect
+      summary: resume the connector
+      operationId: resumeConnector
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        202:
+          description: Accepted
+
+  /connectors/{connectorName}/tasks:
+    get:
+      tags:
+        - /connect
+      summary: get connector tasks
+      operationId: getConnectorTasks
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/ConnectorTask'
+
+  /connectors/{connectorName}/tasks/{taskId}/status:
+    get:
+      tags:
+        - /connect
+      summary: get connector task status
+      operationId: getConnectorTaskStatus
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: taskId
+          in: path
+          required: true
+          schema:
+            type: integer
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/TaskStatus'
+
+  /connectors/{connectorName}/tasks/{taskId}/restart:
+    post:
+      tags:
+        - /connect
+      summary: restart connector task
+      operationId: restartConnectorTask
+      parameters:
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: taskId
+          in: path
+          required: true
+          schema:
+            type: integer
+      responses:
+        200:
+          description: OK
+
+  /connector-plugins:
+    get:
+      tags:
+        - /connect
+      summary: get connector plugins
+      operationId: getConnectorPlugins
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/ConnectorPlugin'
+
+  /connector-plugins/{pluginName}/config/validate:
+    put:
+      tags:
+        - /connect
+      summary: validate connector plugin configuration
+      operationId: validateConnectorPluginConfig
+      parameters:
+        - name: pluginName
+          in: path
+          required: true
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ConnectorConfig'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ConnectorPluginConfigValidationResponse'
+
+components:
+  schemas:
+    ConnectorConfig:
+      type: object
+      additionalProperties:
+        type: object
+
+    Task:
+      type: object
+      properties:
+        connector:
+          type: string
+        task:
+          type: integer
+
+    ConnectorTask:
+      type: object
+      properties:
+        id:
+          $ref: '#/components/schemas/Task'
+        config:
+          $ref: '#/components/schemas/ConnectorConfig'
+
+    NewConnector:
+      type: object
+      properties:
+        name:
+          type: string
+        config:
+          $ref: '#/components/schemas/ConnectorConfig'
+      required:
+        - name
+        - config
+
+    Connector:
+      allOf:
+        - $ref: '#/components/schemas/NewConnector'
+        - type: object
+          properties:
+            tasks:
+              type: array
+              items:
+                $ref: '#/components/schemas/Task'
+            type:
+              type: string
+              enum:
+                - source
+                - sink
+
+    TaskStatus:
+      type: object
+      properties:
+        id:
+          type: integer
+        state:
+          type: string
+          enum:
+            - RUNNING
+            - FAILED
+            - PAUSED
+            - UNASSIGNED
+        worker_id:
+          type: string
+
+    ConnectorStatus:
+      type: object
+      properties:
+        name:
+          type: string
+        connector:
+          type: object
+          properties:
+            state:
+              type: string
+              enum:
+                - RUNNING
+                - FAILED
+                - PAUSED
+                - UNASSIGNED
+            worker_id:
+              type: string
+        tasks:
+          type: array
+          items:
+            $ref: '#/components/schemas/TaskStatus'
+
+    ConnectorPlugin:
+      type: object
+      properties:
+        class:
+          type: string
+
+    ConnectorPluginConfigDefinition:
+      type: object
+      properties:
+        name:
+          type: string
+        type:
+          type: string
+          enum:
+            - BOOLEAN
+            - CLASS
+            - DOUBLE
+            - INT
+            - LIST
+            - LONG
+            - PASSWORD
+            - SHORT
+            - STRING
+        required:
+          type: boolean
+        default_value:
+          type: string
+        importance:
+          type: string
+          enum:
+            - LOW
+            - MEDIUM
+            - HIGH
+        documentation:
+          type: string
+        group:
+          type: string
+        width:
+          type: string
+          enum:
+            - SHORT
+            - MEDIUM
+            - LONG
+            - NONE
+        display_name:
+          type: string
+        dependents:
+          type: array
+          items:
+            type: string
+        order:
+          type: integer
+
+    ConnectorPluginConfigValue:
+      type: object
+      properties:
+        name:
+          type: string
+        value:
+          type: string
+        recommended_values:
+          type: array
+          items:
+            type: string
+        errors:
+          type: array
+          items:
+            type: string
+        visible:
+          type: boolean
+
+    ConnectorPluginConfig:
+      type: object
+      properties:
+        definition:
+          $ref: '#/components/schemas/ConnectorPluginConfigDefinition'
+        value:
+          $ref: '#/components/schemas/ConnectorPluginConfigValue'
+
+    ConnectorPluginConfigValidationResponse:
+      type: object
+      properties:
+        name:
+          type: string
+        error_count:
+          type: integer
+        groups:
+          type: array
+          items:
+            type: string
+        configs:
+          type: array
+          items:
+            $ref: '#/components/schemas/ConnectorPluginConfig'
+

kafka-ui-contract/src/main/resources/swagger/kafka-ui-api.yaml

@@ -10,6 +10,7 @@ info:
     url: http://www.apache.org/licenses/LICENSE-2.0
 tags:
   - name: /api/clusters
+  - name: /api/clusters/connects
 servers:
   - url: /localhost
 
@@ -641,6 +642,364 @@ paths:
         404:
           description: Not Found
 
+  /api/clusters/{clusterName}/connects:
+    get:
+      tags:
+        - /api/clusters/connects
+      summary: get all kafka connect instances
+      operationId: getConnects
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Connect'
+
+  /api/clusters/{clusterName}/connects/{connectName}/connectors:
+    get:
+      tags:
+        - /api/clusters/connects
+      summary: get all connectors from Kafka Connect service
+      operationId: getConnectors
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  type: string
+    post:
+      tags:
+        - /api/clusters/connects
+      summary: create new connector
+      operationId: createConnector
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/NewConnector'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Connector'
+        409:
+          description: rebalance is in progress
+
+  /api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}:
+    get:
+      tags:
+        - /api/clusters/connects
+      summary: get information about the connector
+      operationId: getConnector
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Connector'
+    delete:
+      tags:
+        - /api/clusters/connects
+      summary: delete connector
+      operationId: deleteConnector
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+        409:
+          description: rebalance is in progress
+
+  /api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/action/{action}:
+    post:
+      tags:
+        - /api/clusters/connects
+      summary: update connector state (restart, pause or resume)
+      operationId: updateConnectorState
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: action
+          in: path
+          required: true
+          schema:
+            $ref: '#/components/schemas/ConnectorAction'
+      responses:
+        200:
+          description: OK
+        409:
+          description: rebalance is in progress
+
+  /api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/config:
+    get:
+      tags:
+        - /api/clusters/connects
+      summary: get connector configuration
+      operationId: getConnectorConfig
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ConnectorConfig'
+    put:
+      tags:
+        - /api/clusters/connects
+      summary: update or create connector with provided config
+      operationId: setConnectorConfig
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ConnectorConfig'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/Connector'
+        409:
+          description: rebalance is in progress
+
+  /api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/tasks:
+    get:
+      tags:
+        - /api/clusters/connects
+      summary: get connector tasks
+      operationId: getConnectorTasks
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/Task'
+
+  /api/clusters/{clusterName}/connects/{connectName}/connectors/{connectorName}/tasks/{taskId}/action/restart:
+    post:
+      tags:
+        - /api/clusters/connects
+      summary: restart connector task
+      operationId: restartConnectorTask
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectorName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: taskId
+          in: path
+          required: true
+          schema:
+            type: integer
+      responses:
+        200:
+          description: OK
+
+  /api/clusters/{clusterName}/connects/{connectName}/plugins:
+    get:
+      tags:
+        - /api/clusters/connects
+      summary: get connector plugins
+      operationId: getConnectorPlugins
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: '#/components/schemas/ConnectorPlugin'
+
+  /api/clusters/{clusterName}/connects/{connectName}/plugins/{pluginName}/config/validate:
+    put:
+      tags:
+        - /api/clusters/connects
+      summary: validate connector plugin configuration
+      operationId: validateConnectorPluginConfig
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: connectName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: pluginName
+          in: path
+          required: true
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ConnectorConfig'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ConnectorPluginConfigValidationResponse'
+
 components:
   schemas:
     Cluster:
@@ -1020,3 +1379,200 @@ components:
           type: boolean
       required:
         - isCompatible
+
+    Connect:
+      type: object
+      properties:
+        name:
+          type: string
+        address:
+          type: string
+
+    ConnectorConfig:
+      type: object
+      additionalProperties:
+        type: object
+
+    TaskId:
+      type: object
+      properties:
+        connector:
+          type: string
+        task:
+          type: integer
+
+    Task:
+      type: object
+      properties:
+        id:
+          $ref: '#/components/schemas/TaskId'
+        status:
+          $ref: '#/components/schemas/TaskStatus'
+        config:
+          $ref: '#/components/schemas/ConnectorConfig'
+
+    NewConnector:
+      type: object
+      properties:
+        name:
+          type: string
+        config:
+          $ref: '#/components/schemas/ConnectorConfig'
+      required:
+        - name
+        - config
+
+    Connector:
+      allOf:
+        - $ref: '#/components/schemas/NewConnector'
+        - type: object
+          properties:
+            tasks:
+              type: array
+              items:
+                $ref: '#/components/schemas/TaskId'
+            type:
+              type: string
+              enum:
+                - source
+                - sink
+            status:
+              $ref: '#/components/schemas/ConnectorStatus'
+
+
+    TaskStatus:
+      type: object
+      properties:
+        id:
+          type: integer
+        state:
+          type: string
+          enum:
+            - RUNNING
+            - FAILED
+            - PAUSED
+            - UNASSIGNED
+        worker_id:
+          type: string
+        trace:
+          type: string
+
+    ConnectorStatus:
+      type: object
+      properties:
+        state:
+          type: string
+          enum:
+            - RUNNING
+            - FAILED
+            - PAUSED
+            - UNASSIGNED
+        worker_id:
+          type: string
+
+    ConnectorAction:
+      type: string
+      enum:
+        - restart
+        - pause
+        - resume
+
+    TaskAction:
+      type: string
+      enum:
+        - restart
+
+    ConnectorPlugin:
+      type: object
+      properties:
+        class:
+          type: string
+
+    ConnectorPluginConfigDefinition:
+      type: object
+      properties:
+        name:
+          type: string
+        type:
+          type: string
+          enum:
+            - BOOLEAN
+            - CLASS
+            - DOUBLE
+            - INT
+            - LIST
+            - LONG
+            - PASSWORD
+            - SHORT
+            - STRING
+        required:
+          type: boolean
+        default_value:
+          type: string
+        importance:
+          type: string
+          enum:
+            - LOW
+            - MEDIUM
+            - HIGH
+        documentation:
+          type: string
+        group:
+          type: string
+        width:
+          type: string
+          enum:
+            - SHORT
+            - MEDIUM
+            - LONG
+            - NONE
+        display_name:
+          type: string
+        dependents:
+          type: array
+          items:
+            type: string
+        order:
+          type: integer
+
+    ConnectorPluginConfigValue:
+      type: object
+      properties:
+        name:
+          type: string
+        value:
+          type: string
+        recommended_values:
+          type: array
+          items:
+            type: string
+        errors:
+          type: array
+          items:
+            type: string
+        visible:
+          type: boolean
+
+    ConnectorPluginConfig:
+      type: object
+      properties:
+        definition:
+          $ref: '#/components/schemas/ConnectorPluginConfigDefinition'
+        value:
+          $ref: '#/components/schemas/ConnectorPluginConfigValue'
+
+    ConnectorPluginConfigValidationResponse:
+      type: object
+      properties:
+        name:
+          type: string
+        error_count:
+          type: integer
+        groups:
+          type: array
+          items:
+            type: string
+        configs:
+          type: array
+          items:
+            $ref: '#/components/schemas/ConnectorPluginConfig'

pom.xml

@@ -24,6 +24,9 @@
 		<dockerfile-maven-plugin.version>1.4.10</dockerfile-maven-plugin.version>
 		<frontend-maven-plugin.version>1.8.0</frontend-maven-plugin.version>
 		<maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
+		<maven-clean-plugin.version>3.1.0</maven-clean-plugin.version>
+		<maven-resources-plugin.version>3.1.0</maven-resources-plugin.version>
+		<maven-surefire-plugin.version>2.22.0</maven-surefire-plugin.version>
 		<openapi-generator-maven-plugin.version>4.3.0</openapi-generator-maven-plugin.version>
 		<swagger-annotations.version>1.6.0</swagger-annotations.version>
 		<springdoc-openapi-webflux-ui.version>1.2.32</springdoc-openapi-webflux-ui.version>
@@ -33,6 +36,8 @@
 		<apache.commons.version>2.2</apache.commons.version>
 		<test.containers.version>1.15.1</test.containers.version>
 		<junit-jupiter-engine.version>5.4.0</junit-jupiter-engine.version>
+
+		<frontend-generated-sources-directory>..//kafka-ui-react-app/src/generated-sources</frontend-generated-sources-directory>
 	</properties>
 
 	<repositories>