Ehcache 简单的监控

阅读更多

1.web页面显示:ehcache缓存信息

 

index.jsp

监控列表：

 

2. main函数测试代码(来源网络，并加以修改):

package test;

import java.io.Serializable;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.List;

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

/**  
 #############################################################################  
 # DESCRIBE ehcache 缓存操作DEMO  
 # AUTHOR    悠～游   (原创地址：http://www.uusam.com/uu/blog/?p=60)
 # DATE      2006-7-10  
 # COMPANY   FLX  
 # PORJECT   ehcache-demo  
 #
 # 这篇文章写得比较早，ehcache变化很大，代码方法都变了，我使用ehcache2.x,并对代码进行了相应修改 add by nassir wen 2012-07-23
 #############################################################################  
 */

public class Demo {

    static CacheManager manager = new CacheManager();

    public static void main(String[] args) throws InterruptedException {
        DateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String[] cacheNames = manager.getCacheNames();
        System.out.println("读取的缓存列表为:");
        for (int i = 0; i < cacheNames.length; i++) {
            System.out.println("--" + (i + 1) + " " + cacheNames[i]);
        }

        Cache cache = manager.getCache("mycache");
        Element element = new Element("key1", "value1");
        cache.put(element);

        element = cache.get("key1");
        Serializable value = element.getValue();
        System.out.println("序列化后的值为：" + value.toString());

        element = cache.get("key1");
        Object value1 = element.getObjectValue();
        System.out.println("未序列化的值为：" + value1.toString());

        int elementSize = cache.getSize();
        System.out.println("得到缓存的对象数量：" + elementSize);
        
        //缓存元素集合
        System.out.println("-----------------------缓存元素统计数据---------------------------------");
        List keys = cache.getKeys();
        for (Object key : keys) {
            Element ele = cache.get(key);
            System.out.println("内容: " + ele.getValue());
            System.out.println("创建时间: " + sf.format(ele.getCreationTime()));
            System.out.println("最后访问时间: " + sf.format(ele.getLastAccessTime()));
            System.out.println("过期时间: " + sf.format(ele.getExpirationTime()));
            System.out.println("最后更新时间: " + sf.format(ele.getLastUpdateTime()));
            System.out.println("命中次数: " + ele.getHitCount());
            System.out.println("存活时间: " + ele.getTimeToLive() + "ms");
            System.out.println("空闲时间: " + ele.getTimeToIdle() + "ms");
        }
        System.out.println("--------------------------------------------------------");
        
        System.out.println("-----------------------缓存总统计数据---------------------------------");
        long elementsInMemory1 = cache.getMemoryStoreSize();
        System.out.println("得到缓存对象占用内存的数量：" + elementsInMemory1);

        long elementsInMemory2 = cache.getDiskStoreSize();
        System.out.println("得到缓存对对象占用磁盘的数量：" + elementsInMemory2);

        //获取缓存统计对象
        Statistics stat = cache.getStatistics();
        long hits = stat.getCacheHits();
        System.out.println("得到缓存读取的命中次数：" + hits);

        long memoryHits = stat.getInMemoryHits();
        System.out.println("得到内存中缓存读取的命中次数：" + memoryHits);

        long diskHits = stat.getOnDiskHits();
        System.out.println("得到磁盘中缓存读取的命中次数：" + diskHits);

        long cacheMisses = stat.getCacheMisses();
        System.out.println("得到缓存读取的丢失次数：" + cacheMisses);

        long evictionCount = stat.getEvictionCount();
        System.out.println("得到缓存读取的已经被销毁的对象丢失次数：" + evictionCount);
        
        System.out.println("--------------------------------------------------------");
    }
}

 

代码见附件：EhCache-Cluster-Tester.zip 

• 
• 大小: 15.6 KB

• 
• 大小: 35.6 KB

• EhCache-Cluster-Tester.zip (2.7 MB)
• 下载次数: 281

• 查看图片附件