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package org.infinispan.commons.stat;

/**
 * Tracks a monotonically increasing values.
 * 
 * The counters may never be reset to a lesser value.
 */
public interface CounterTracker {

   CounterTracker NO_OP = new CounterTracker() {
      @Override
      public void increment() {
         //no-op
      }

      @Override
      public void increment(double amount) {
         //no-op
      }
   };

   /**
    * Update the counter by one.
    */
   void increment();

   /**
    * Update the counter by {@code amount}.
    *
    * @param amount The amount to add to the counter.
    */
   void increment(double amount);

}