Spring Ehcache代码实现监控

1，使用ehcache-monitor-kit缓存监控这个貌似要license，需要在ehcache.xml中配置等。这里不做详述。可以参考http://www.yuananan.cn/html/article/AR64m1684VKax5Ahhp53gp.html

2，手动实现
以下是我spring配置文件中ehache的配置

<!-- Spring提供的基于的Ehcache实现的缓存管理器 -->    <bean id="cacheManagerFactory" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">        <property name="configLocation" value="classpath:ehcache.xml"/>    </bean>    <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">        <property name="cacheManager" ref="cacheManagerFactory"/>    </bean>

3，封装一个Cache的Service，用于查询缓存的

import java.util.ArrayList;import java.util.List;import javax.annotation.PostConstruct;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cache.ehcache.EhCacheCacheManager;import org.springframework.stereotype.Service;import net.sf.ehcache.CacheManager;import net.sf.ehcache.Ehcache;import net.sf.ehcache.Element;@Servicepublic class CacheManagerService {    @Autowired    public EhCacheCacheManager ehCacheManager;    private CacheManager cacheManager;    @PostConstruct    public void init(){        cacheManager = ehCacheManager.getCacheManager();    }    /**     * 获取所有缓存的名称     * @return     */    public String[] getCacheNames(){        return cacheManager.getCacheNames();    }    /**     * 根据名称获取缓存对象     * @param name     * @return     */    public Ehcache getEhcache(String name){        return cacheManager.getEhcache(name);    }    /**     * 获取缓存名中所有的key     * @param name     * @return     */    public List getEhcacheKeys(String name){        return getEhcache(name).getKeys();    }    /**     * 根据缓存名和key获取Element对象     * @param name     * @param key     * @return     */    public Element getElements(String name,String key){        Ehcache cache = getEhcache(name);        if(cache == null){            return null;        }        return cache.getQuiet(key);    }    public List<Ehcache> getEhCaches(){        String[] cacheNames = getCacheNames();        List<Ehcache> list = new ArrayList<Ehcache>();        for(String cacheName:cacheNames){            list.add(cacheManager.getEhcache(cacheName));        }        return list;    }}

4，测试的方法

private void printCacheKeys(String line) {        String[] params = line.split(" ");        CacheManagerService cacheManager = BeanConfigLoad.getBean(CacheManagerService.class);        List list= cacheManager.getEhcacheKeys(params[1]);        System.out.print(StringUtils.rightPad("Key", 15));        System.out.print(" | ");        System.out.print(StringUtils.rightPad("HintCount", 10));        System.out.print(" | ");        System.out.print(StringUtils.rightPad("CreationTime", 25));        System.out.print(" | ");        System.out.print(StringUtils.rightPad("LastAccessTime", 25));        System.out.print(" | ");        System.out.print(StringUtils.rightPad("TimeToLive(ms)", 15));        System.out.print(" | ");        System.out.print(StringUtils.rightPad("TimeToIdle(ms)", 15));        System.out.print(" | ");        System.out.println();        for(Object cache:list){            Element element = cacheManager.getElements(params[1], cache.toString());            System.out.print(StringUtils.rightPad(cache.toString(), 15));//key name            System.out.print(" | ");            System.out.print(StringUtils.rightPad(""+element.getHitCount(), 10));//命中次数            System.out.print(" | ");            System.out.print(StringUtils.rightPad(pareTime(element.getCreationTime()), 25));//创建时间            System.out.print(" | ");            System.out.print(StringUtils.rightPad(pareTime(element.getLastAccessTime()), 25));//最后访问时间            System.out.print(" | ");            System.out.print(StringUtils.rightPad(""+element.getTimeToLive(), 15));   //存活时间            System.out.print(" | ");            System.out.print(StringUtils.rightPad(""+element.getTimeToIdle(), 15));   //空闲时间            System.out.print(" | ");            System.out.println();        }    }    private static String pareTime(long millis){        try {            Calendar calendar = Calendar.getInstance();            calendar.setTimeInMillis(millis);            DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS");            return formatter.format(calendar.getTime());        } catch (Exception e) {            log.error("",e);        }        return null;    }

TIP:
这样可以在自己的系统里面做几个页面，就可以了。也不用使用1中的方法，配置了。
来一张测试方法打印的效果图：

Element中还有很多其它的方法，如下图：

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