ehcachefunctinobyname.java

Java开发的权限管理的例子

package org.artemis.manager.auth.cache.info;

import java.io.Serializable;
import org.apache.log4j.Logger;
import org.springframework.dao.DataRetrievalFailureException;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheException;
import net.sf.ehcache.Element;
import org.artemis.right.model.Function;

public class EhCacheFunctinoByName implements FunctionByNameCache {
	private static Logger logger=Logger.getLogger(EhCacheFunctinoByName.class);
	private Cache cache;

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

    public Cache getCache() {
        return cache;
    }
    /**
     * 从缓存中获得Function
     */
	public Function getFunctionByCache(String functionname) {
		 Element element = null;
	        try {
	            element = cache.get(functionname);
	        } catch (CacheException cacheException) {
	            throw new DataRetrievalFailureException("Cache failure: "
	                + cacheException.getMessage());
	        }
            /*
	        if (logger.isDebugEnabled()) {
	            logger.debug("Cache hit: " + (element != null) + "; functionname: "
	                + functionname);
	        }
            */
	        if (element == null) {
	            return null;
	        } else {
	            return (Function) element.getValue();
	        }
	}

	public void putFunctionInCache(Function function) {
		if(function!=null){
			Element element = new Element(function.getName(),(Serializable)function);
			/*
	        if (logger.isDebugEnabled()) {
	            logger.debug("Cache put: " + element.getKey());            
	        }
	        */
	        cache.put(element);
		}else{
			logger.info("Function is null");
		}

	}

	public void removeFunctionFromCache(String functionName) {
		

	}

}