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 org.apache.kafka.test;
  
  import org.apache.kafka.common.ClusterResource;
  import org.apache.kafka.common.ClusterResourceListener;
  import org.apache.kafka.common.serialization.Deserializer;
  
  import java.nio.charset.StandardCharsets;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicInteger;
  import java.util.concurrent.atomic.AtomicReference;
  
  public class MockDeserializer implements ClusterResourceListener, Deserializer<String> {
      public static AtomicInteger initCount = new AtomicInteger(0);
      public static AtomicInteger closeCount = new AtomicInteger(0);
      public static AtomicReference<ClusterResource> clusterMeta = new AtomicReference<>();
      public static ClusterResource noClusterId = new ClusterResource("no_cluster_id");
      public static AtomicReference<ClusterResource> clusterIdBeforeDeserialize = new AtomicReference<>(noClusterId);
  
      public boolean isKey;
      public Map<String, ?> configs;
  
      public static void resetStaticVariables() {
          initCount = new AtomicInteger(0);
          closeCount = new AtomicInteger(0);
          clusterMeta = new AtomicReference<>();
          clusterIdBeforeDeserialize = new AtomicReference<>(noClusterId);
      }
  
      public MockDeserializer() {
          initCount.incrementAndGet();
      }
  
      @Override
      public void configure(Map<String, ?> configs, boolean isKey) {
          this.configs = configs;
          this.isKey = isKey;
      }
  
      @Override
      public String deserialize(String topic, byte[] data) {
          // This will ensure that we get the cluster metadata when deserialize is called for the first time
          // as subsequent compareAndSet operations will fail.
          clusterIdBeforeDeserialize.compareAndSet(noClusterId, clusterMeta.get());
          if (data == null) return null;
          return new String(data, StandardCharsets.UTF_8);
      }
  
      @Override
      public void close() {
          closeCount.incrementAndGet();
      }
  
      @Override
      public void onUpdate(ClusterResource clusterResource) {
          clusterMeta.set(clusterResource);
      }
  }