Add endpoint to check schema compatibility

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

@@ -2,6 +2,7 @@ package com.provectus.kafka.ui.cluster.mapper;
 
 import com.provectus.kafka.ui.cluster.config.ClustersProperties;
 import com.provectus.kafka.ui.cluster.model.*;
+import com.provectus.kafka.ui.cluster.model.InternalCompatibilityCheck;
 import com.provectus.kafka.ui.model.*;
 import java.util.Properties;
 import org.mapstruct.Mapper;
@@ -36,6 +37,9 @@ public interface ClusterMapper {
     TopicConfig toTopicConfig(InternalTopicConfig topic);
     Replica toReplica(InternalReplica replica);
 
+    @Mapping(target = "isCompatible", source = "compatible")
+    CompatibilityCheckResponse toCompatibilityCheckResponse(InternalCompatibilityCheck dto);
+
     default TopicDetails toTopicDetails(InternalTopic topic, InternalClusterMetrics metrics) {
         final TopicDetails result = toTopicDetails(topic);
         result.setBytesInPerSec(

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

@@ -0,0 +1,10 @@
+package com.provectus.kafka.ui.cluster.model;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Data;
+
+@Data
+public class InternalCompatibilityCheck {
+    @JsonProperty("is_compatible")
+    private final boolean isCompatible;
+}

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

@@ -1,11 +1,10 @@
 package com.provectus.kafka.ui.cluster.service;
 
 import com.provectus.kafka.ui.cluster.exception.NotFoundException;
+import com.provectus.kafka.ui.cluster.mapper.ClusterMapper;
 import com.provectus.kafka.ui.cluster.model.ClustersStorage;
-import com.provectus.kafka.ui.model.CompatibilityLevel;
+import com.provectus.kafka.ui.cluster.model.InternalCompatibilityCheck;
-import com.provectus.kafka.ui.model.CompatibilityLevelResponse;
+import com.provectus.kafka.ui.model.*;
-import com.provectus.kafka.ui.model.NewSchemaSubject;
-import com.provectus.kafka.ui.model.SchemaSubject;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.log4j.Log4j2;
 import org.springframework.http.HttpStatus;
@@ -31,6 +30,7 @@ public class SchemaRegistryService {
     private static final String LATEST = "latest";
 
     private final ClustersStorage clustersStorage;
+    private final ClusterMapper mapper;
     private final WebClient webClient;
 
     public Flux<String> getAllSchemaSubjects(String clusterName) {
@@ -146,4 +146,17 @@ public class SchemaRegistryService {
                             .bodyToMono(CompatibilityLevelResponse.class);
                 }).orElse(Mono.error(new NotFoundException("No such cluster")));
     }
+
+    public Mono<CompatibilityCheckResponse> checksSchemaCompatibility(String clusterName, String schemaName, Mono<NewSchemaSubject> newSchemaSubject) {
+        return clustersStorage.getClusterByName(clusterName)
+                .map(cluster -> webClient.post()
+                        .uri(cluster.getSchemaRegistry() + "/compatibility/subjects/{subjectName}/versions/latest", schemaName)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .body(BodyInserters.fromPublisher(newSchemaSubject, NewSchemaSubject.class))
+                        .retrieve()
+                        .bodyToMono(InternalCompatibilityCheck.class)
+                        .map(mapper::toCompatibilityCheckResponse)
+                        .log()
+                ).orElse(Mono.error(new NotFoundException("No such cluster")));
+    }
 }

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

@@ -186,6 +186,15 @@ public class MetricsRestController implements ApiClustersApi {
                 .onErrorReturn(ResponseEntity.notFound().build());
     }
 
+    @Override
+    public Mono<ResponseEntity<CompatibilityCheckResponse>> checkSchemaCompatibility(String clusterName, String schemaName,
+                                                               @Valid Mono<NewSchemaSubject> newSchemaSubject,
+                                                               ServerWebExchange exchange) {
+        return schemaRegistryService.checksSchemaCompatibility(clusterName, schemaName, newSchemaSubject)
+                .map(ResponseEntity::ok)
+                .onErrorReturn(ResponseEntity.badRequest().build());
+    }
+
     @Override
     public Mono<ResponseEntity<Void>> updateSchemaCompatibilityLevel(String clusterName, String schemaName, @Valid Mono<CompatibilityLevel> compatibilityLevel, ServerWebExchange exchange) {
         log.info("Updating schema compatibility for schema: {}", schemaName);

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

@@ -636,6 +636,38 @@ paths:
         404:
           description: Not Found
 
+  /api/clusters/{clusterName}/schemas/compatibility/{schemaName}/check:
+    post:
+      tags:
+        - /api/clusters
+      summary: Check compatibility of the schema.
+      operationId: checkSchemaCompatibility
+      parameters:
+        - name: clusterName
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: schemaName
+          in: path
+          required: true
+          schema:
+            type: string
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/NewSchemaSubject'
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/CompatibilityCheckResponse'
+        404:
+          description: Not Found
+
 components:
   schemas:
     Cluster:
@@ -1005,3 +1037,11 @@ components:
           type: string
       required:
         - compatibilityLevel
+
+    CompatibilityCheckResponse:
+      type: object
+      properties:
+        isCompatible:
+          type: boolean
+      required:
+        - isCompatible