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package com.jquicker.cache;

import java.util.Properties;

import com.jquicker.aop.Advice;
import com.jquicker.commons.cache.ICache;
import com.jquicker.commons.cache.LocalCache;
import com.jquicker.commons.cache.RedisCache;
import com.jquicker.configure.RedisConfig;
import com.jquicker.context.bean.ProxyFactory;


/**
 * 缓存代理类

 * 当使用Redis缓存时，为避免多项目同服务器部署而导致缓存键值冲突，通过代理对象增加全局的缓存前缀

 * 可通过RedisConfig.setPrefix()或者配置prefix设置全局前缀

 * 
 * @author OL
 *
 */
public final class CacheProxy {

	private static String PREFIX = RedisConfig.getPrefix();
	
	public static ICache PROXY;
	
	static {
		// 目标对象
		Properties config = RedisConfig.get();
		if(config != null && RedisConfig.isEnable()) {
			PROXY = new RedisCache(config);
			
			// 申明一个切面Aspect
			CacheAspect aspect = new CacheAspect(PREFIX);
	    	// 创建一个 Advice
	    	Advice advice = new CacheAdvice(PROXY, aspect);
	    	// 为目标对象生成代理对象
	    	PROXY = ProxyFactory.newProxyInstance(PROXY, advice);
	    	
		} else {
			PROXY = new LocalCache(); // 默认使用本地缓存
		}
	}
}