cacheinterceptor.java

来自「采用tapestry的简单OA系统」· Java 代码 · 共 49 行

package com.ejsun.entapps.core.cache;

import java.io.Serializable;

import net.sf.ehcache.Cache;
import net.sf.ehcache.Element;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author	Quake Wang
 * @since	2004-5-18
 * @version $Revision: 1.1 $
 * 
 **/
public class CacheInterceptor implements MethodInterceptor {
	private static final Log log = LogFactory.getLog(CacheInterceptor.class);
	private CacheManager cacheManager;
	private CacheController cacheController;

	public Object invoke(MethodInvocation invocation) throws Throwable {
		Cache cache =
			cacheManager.getCache(
				cacheController.getCacheName(invocation.getMethod()));
		String key =
			cacheController.getCacheKey(
				invocation.getMethod(),
				invocation.getArguments());
		Element result = cache.get(key);
		if (result == null) {
			result = new Element(key, (Serializable) invocation.proceed());
			cache.put(result);
		}
		return result.getValue();
	}

	public void setCacheManager(CacheManager manager) {
		cacheManager = manager;
	}

	public void setCacheController(CacheController controller) {
		cacheController = controller;
	}

}