如何获取ehcache 3.1统计信息 [英] How to get ehcache 3.1 statistics
问题描述
在Ehcache 3.1中,我有一个案例来了解当前存储在ehcache中的元素的大小,以及到目前为止缓存已达到的命中和未命中的数量。我认为2.6具有.getStatistics(),它具有相似的功能,但是在3.1版本中却很难找到相同的功能。
With Ehcache 3.1, I have a case to know the size of elements that are currently stored in the ehcache and also the number of hits and misses that the cache has so far. I think the 2.6 has the .getStatistics(), which does the similar things, However the same feature i am struggling to find with 3.1 version.
感谢您的帮助!
推荐答案
对于Ehcache 3.5.2以及任何其他JCache Provider,您可以使用标准方法在缓存配置期间启用统计信息。实例:
For Ehcache 3.5.2 as well as for any other JCache Provider you can use standard methods to enable statistics during cache configuration For instanse:
...
MutableConfiguration<Path, String> config = new MutableConfiguration<>();
config.setStatisticsEnabled(true);
...
Cache myCache = cacheManager.createCache(CACHE_NAME, config);
然后,您可以使用以下方法找到MXBean注册静态变量:
Then you could find register statics MXBean using the following method:
public static CacheStatisticsMXBean getCacheStatisticsMXBean(final String cacheName) {
final MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();
ObjectName name = null;
try {
name = new ObjectName("*:type=CacheStatistics,*,Cache=" + cacheName);
} catch (MalformedObjectNameException ex) {
LOG.error("Someting wrong with ObjectName {}", ex);
}
Set<ObjectName> beans = mbeanServer.queryNames(name, null);
if (beans.isEmpty()) {
LOG.debug("Cache Statistics Bean not found");
return null;
}
ObjectName[] objArray = beans.toArray(new ObjectName[beans.size()]);
return JMX.newMBeanProxy(mbeanServer, objArray[0], CacheStatisticsMXBean.class);
}
如果找到,请享受您的统计信息:
And if it is found enjoy your statistics:
CacheStatisticsMXBean CacheStatBean = getCacheStatisticsMXBean(cacheName);
if (CacheStatBean != null) {
LOG.debug("Cache hits #{} misses #{}", CacheStatBean.getCacheHits(), CacheStatBean.getCacheMisses());
LOG.debug("Cache hits %{} misses %{}", CacheStatBean.getCacheHitPercentage(),
CacheStatBean.getCacheMissPercentage());
LOG.debug("Cache gets #{}", CacheStatBean.getCacheGets());
LOG.debug("Cache evictions #{}", CacheStatBean.getCacheEvictions());
LOG.debug("Cache average get time {} milliseconds", CacheStatBean.getAverageGetTime());
}
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