package org.webslinger.lang;

 import java.util.Map;

 import java.util.TreeMap;

 import java.util.concurrent.atomic.AtomicInteger;

 public class KeyedCounter {

     private final AtomicMap<String, AtomicInteger> map = new AtomicMap<String, AtomicInteger>(new TreeMap<String, AtomicInteger>()) {

         protected AtomicInteger createValue(String name) {

             return new AtomicInteger();

         }

         protected Map<String, AtomicInteger> copyMap(Map<String, AtomicInteger> oldMap) {

             return new TreeMap<String, AtomicInteger>(oldMap);

         }

     };

     public void incr(String name) {

         map.getOrCreate(name).incrementAndGet();

     }

     public String toString() {

         return map.map().toString();

     }

 }