senmesh-zc/src/main/java/com/senmesh/common/cache/DefaultCacheProvider.java

package com.senmesh.common.cache;

import java.util.Map;

import org.apache.commons.collections.MapUtils;

import com.google.common.collect.Maps;

/**
 * @author sr on 2020-07-07
 */
public class DefaultCacheProvider implements ICacheProvider {

  private Map<String, Long> numLimitMap = Maps.newConcurrentMap();

  @Override
  public boolean outLimit(final String key, Long maxNumLimit) {
    Long currentNumLimit = null;
    final Object lockKey = key.intern();
    synchronized (lockKey) {
      currentNumLimit = MapUtils.getLong(numLimitMap, key, 0L);
      if (currentNumLimit >= maxNumLimit) {
        return true;
      }
      currentNumLimit++;
      numLimitMap.put(key, currentNumLimit);
    }
    return false;
  }
  
}