/*
 * Copyright 1999-2012 Alibaba Group.
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.dubbo.examples.cache;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.alibaba.dubbo.examples.cache.api.CacheService;

/**
 * CacheConsumer
 * 
 * @author william.liangf
 */
public class CacheConsumer {
    
    public static void main(String[] args) throws Exception {
        String config = CacheConsumer.class.getPackage().getName().replace('.', '/') + "/cache-consumer.xml";
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(config);
        context.start();
        
        CacheService cacheService = (CacheService)context.getBean("cacheService");

        // 测试缓存生效，多次调用返回同样的结果。(服务器端自增长返回值)
        String fix = null;
        for (int i = 0; i < 5; i ++) {
            String result = cacheService.findCache("0");
            if (fix == null || fix.equals(result)) {
                System.out.println("OK: " + result);
            } else {
                System.err.println("ERROR: " + result);
            }
            fix = result;
            Thread.sleep(500);
        }
        
        // LRU的缺省cache.size为1000，执行1001次，应有溢出
        for (int n = 0; n < 1001; n ++) {
            String pre = null;
            for (int i = 0; i < 10; i ++) {
                String result = cacheService.findCache(String.valueOf(n));
                if (pre != null && ! pre.equals(result)) {
                    System.err.println("ERROR: " + result);
                }
                pre = result;
            }
        }
        
        // 测试LRU有移除最开始的一个缓存项
        String result = cacheService.findCache("0");
        if (fix != null && ! fix.equals(result)) {
            System.out.println("OK: " + result);
        } else {
            System.err.println("ERROR: " + result);
        }
    }

}