methodcacheafteradvice.java

动态实现基于角色的权限管理Acegi+hibernate

package sample.auth.interceptor;

import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.Iterator;

import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.aop.AfterReturningAdvice;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;

public class MethodCacheAfterAdvice implements AfterReturningAdvice,InitializingBean {

	 private static final Log logger = LogFactory.getLog(MethodCacheAfterAdvice.class); 
	 private Cache cache; 
	 private CacheManager cacheManager;
	 
	// cacheManager = CacheManager.create();
	
	public void setCache(Cache cache) {
		this.cache = cache;
	}

	public MethodCacheAfterAdvice() { 
        super(); 
	} 

	public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable { 
        for(Iterator itr = cache.getKeys().iterator(); itr.hasNext();){ 
                Serializable key = (Serializable)itr.next(); 

                if(key.toString().indexOf(method.getDeclaringClass().getName()) != -1){
                	cache.remove(key);
                	logger.info("remove cache after db change"+key);
                }
        } 
} 



	public void afterPropertiesSet() throws Exception {
		Assert.notNull(cache, "there must be a cache"); 

	}

}