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/*
 * Beangle, Agile Java/Scala Development Scaffold and Toolkit
 *
 * Copyright (c) 2005-2013, Beangle Software.
 *
 * Beangle is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Beangle is distributed in the hope that it will be useful.
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Beangle.  If not, see .
 */
package org.beangle.security.cas.auth;

import net.sf.ehcache.CacheException;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.Element;

import org.beangle.commons.bean.Initializing;
import org.beangle.commons.lang.Assert;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Caches tickets using a Ehcache defined EHCACHE.
 * 
 * @author chaostone
 */
public class EhCacheTicketCache implements StatelessTicketCache, Initializing {

  private static final Logger logger = LoggerFactory.getLogger(EhCacheTicketCache.class);

  private Ehcache cache;

  public void init() throws Exception {
    Assert.notNull(cache, "cache mandatory");
  }

  public CasAuthentication get(String serviceTicket) {
    Element element = null;
    try {
      element = cache.get(serviceTicket);
    } catch (CacheException cacheException) {
      throw new CacheException("Cache failure: " + cacheException.getMessage());
    }

    if (logger.isDebugEnabled()) {
      logger.debug("Cache hit: " + (element != null) + "; service ticket: " + serviceTicket);
    }

    if (element == null) {
      return null;
    } else {
      return (CasAuthentication) element.getValue();
    }
  }

  public Ehcache getCache() {
    return cache;
  }

  public void put(CasAuthentication token) {
    Element element = new Element(token.getCredentials().toString(), token);
    logger.debug("Cache put: {}", element.getKey());
    cache.put(element);
  }

  public void remove(CasAuthentication token) {
    logger.debug("Cache remove: {}", token.getCredentials().toString());
    this.remove(token.getCredentials().toString());
  }

  public void remove(String serviceTicket) {
    cache.remove(serviceTicket);
  }

  public void setCache(Ehcache cache) {
    this.cache = cache;
  }
}