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.timeline;
  
  import org.apache.kafka.common.utils.LogContext;
  
  import java.util.ArrayList;
  import java.util.List;
  
  
  public class TrackingSnapshotRegistry extends SnapshotRegistry {
      private final List<String> operations = new ArrayList<>();
  
      public TrackingSnapshotRegistry(LogContext logContext) {
          super(logContext);
      }
  
      public List<String> operations() {
          return new ArrayList<>(operations);
      }
  
      @Override
      public void revertToSnapshot(long targetEpoch) {
          operations.add("revert[" + targetEpoch + "]");
          super.revertToSnapshot(targetEpoch);
      }
  
      @Override
      public void reset() {
          operations.add("reset");
          super.reset();
      }
  
      @Override
      public Snapshot getOrCreateSnapshot(long epoch) {
          if (!hasSnapshot(epoch)) {
              operations.add("snapshot[" + epoch + "]");
          }
          return super.getOrCreateSnapshot(epoch);
      }
  }
  