content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package kafka.server;
  
  import org.apache.kafka.image.MetadataDelta;
  import org.apache.kafka.image.MetadataImage;
  import org.apache.kafka.image.loader.LoaderManifest;
  import org.apache.kafka.image.publisher.MetadataPublisher;
  import org.apache.kafka.server.common.MetadataVersion;
  import org.apache.kafka.server.fault.FaultHandler;
  
  public class MetadataVersionConfigValidator implements MetadataPublisher {
      private final String name;
      private final KafkaConfig config;
      private final FaultHandler faultHandler;
  
      public MetadataVersionConfigValidator(
              KafkaConfig config,
              FaultHandler faultHandler
      ) {
          int id = config.brokerId();
          this.name = "MetadataVersionPublisher(id=" + id + ")";
          this.config = config;
          this.faultHandler = faultHandler;
      }
  
      @Override
      public String name() {
          return name;
      }
  
      @Override
      public void onMetadataUpdate(
              MetadataDelta delta,
              MetadataImage newImage,
              LoaderManifest manifest
      ) {
          if (delta.featuresDelta() != null) {
              if (delta.metadataVersionChanged().isPresent()) {
                  onMetadataVersionChanged(newImage.features().metadataVersionOrThrow());
              }
          }
      }
  
      @SuppressWarnings("ThrowableNotThrown")
      private void onMetadataVersionChanged(MetadataVersion metadataVersion) {
          try {
              this.config.validateWithMetadataVersion(metadataVersion);
          } catch (Throwable t) {
              this.faultHandler.handleFault(
                      "Broker configuration does not support the cluster MetadataVersion", t);
          }
      }
  }
  