/*
    *    Copyright 2016-2026 the original author or authors.
    *
    *    Licensed 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
    *
    *       https://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 issues.gh324;
  
  import org.apache.ibatis.cache.impl.PerpetualCache;
  import org.jspecify.annotations.Nullable;
  
  public class ObservableCache extends PerpetualCache {
  
      private static ObservableCache instance;
  
      public static ObservableCache getInstance() {
          return instance;
      }
  
      private int requests = 0;
  
      public int getRequests() {
          return requests;
      }
  
      public int getHits() {
          return hits;
      }
  
      private int hits = 0;
  
      public ObservableCache(String id) {
          super(id);
          instance = this;
      }
  
      @Override
      public void putObject(Object key, Object value) {
          super.putObject(key, value);
      }
  
      @Override
      public @Nullable Object getObject(Object key) {
          Object answer = super.getObject(key);
  
          if (key.toString().contains("select id, name from NameTable where id = ?")) {
              requests++;
  
              if (answer != null) {
                  hits++;
              }
          }
  
          return answer;
      }
  
      @Override
      public void clear() {
          requests = 0;
          hits = 0;
          super.clear();
      }
  }