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package com.clickntap.tool.cache;

import java.io.Serializable;
import java.util.List;

import com.clickntap.tool.types.Datetime;

import net.sf.ehcache.Element;

public class EhCache implements Cache {
  private net.sf.ehcache.Cache cache;

  public EhCache(net.sf.ehcache.CacheManager cacheManager, String cacheName, int maxSize) throws Exception {
    synchronized (cacheName) {
      cache = cacheManager.getCache(cacheName);
      if (cache == null) {
        cache = new net.sf.ehcache.Cache(cacheName, maxSize, false, false, 5 * Datetime.ONEHOURINSECONDS, 2 * Datetime.ONEHOURINSECONDS);
        cacheManager.addCache(cache);
        cache = cacheManager.getCache(cacheName);
      }
    }
  }

  public Serializable get(Serializable key) throws Exception {
    Element element = cache.get(key);
    return (Serializable) (element != null ? element.getObjectValue() : null);
  }

  public Serializable put(Serializable key, Serializable value) throws Exception {
    Element element = new Element(key, value);
    cache.put(element);
    return value;
  }

  public void remove(Serializable theKey) throws Exception {
    String rootKey = theKey.toString().substring(0, theKey.toString().lastIndexOf('-'));
    for (Object aKey : (List) cache.getKeys()) {
      if (aKey.toString().startsWith(rootKey)) {
        cache.remove(aKey);
      }
    }
  }

  public void removeAll() throws Exception {
    cache.removeAll();
  }

  public boolean contains(Serializable key) throws Exception {
    return cache.isKeyInCache(key);
  }
}