code: /*
   * Copyright 2012-2018 Chronicle Map Contributors
   *
   * 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
   *
   *     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 net.openhft.chronicle.map;
  
  import java.io.File;
  import java.io.IOException;
  
  public final class MapDiagnostics {
  
      private MapDiagnostics() {
      }
  
      public static void main(String[] args) throws IOException {
          String mapFile = args[0];
          try (ChronicleMap map = ChronicleMap.of(Object.class, Object.class)
                  .createPersistedTo(new File(mapFile))) {
              printMapStats(map);
          }
      }
  
      public static <K, V> void printMapStats(ChronicleMap<K, V> map) {
          for (int i = 0; i < map.segments(); i++) {
              try (MapSegmentContext<K, V, ?> c = map.segmentContext(i)) {
                  System.out.printf("segment %d contains %d entries\n", i, c.size());
                  c.forEachSegmentEntry(e -> System.out.printf("%s, %d bytes -> %s, %d bytes\n",
                          e.key(), e.key().size(), e.value(), e.value().size()));
              }
          }
      }
  }
  