package org.modeshape.graph.connector.path.cache;
   
   import java.util.concurrent.atomic.AtomicLong;
   import net.jcip.annotations.ThreadSafe;
   
   /**
    * Default, thread-safe implementation of {@link CacheStatistics} that uses {@link AtomicLong AtomicLongs} as counters for the
    * statistics.
    */
  @ThreadSafe
  public final class DefaultCacheStatistics implements CacheStatistics {
      private final AtomicLong writes = new AtomicLong(0);
      private final AtomicLong hits = new AtomicLong(0);
      private final AtomicLong misses = new AtomicLong(0);
      private final AtomicLong expirations = new AtomicLong(0);
  
      public long getWrites() {
          return writes.get();
      }
  
      public long getHits() {
          return hits.get();
      }
  
      public long getMisses() {
          return misses.get();
      }
  
      public long getExpirations() {
          return expirations.get();
      }
  
      public long incrementWrites() {
          return writes.getAndIncrement();
      }
  
      public long incrementHits() {
          return hits.getAndIncrement();
      }
  
      public long incrementMisses() {
          return misses.getAndIncrement();
      }
  
      public long incrementExpirations() {
          return expirations.getAndIncrement();
      }
  }