How to use

hitRate

method

in

com.google.common.cache.CacheStats

@Override
public Number getValue() {
  if (getCache() == null) return Long.valueOf(0);
  return Double.valueOf(getStats().hitRate() * 100);
}

public double hitRate() {
 return (matchesCache.stats().hitRate() + sentenceCache.stats().hitRate()) / 2.0;
}

@Managed
public Double getHitRate()
{
  return loadingCache.stats().hitRate();
}

assertEquals(1, stats.requestCount());
assertEquals(0, stats.hitCount());
assertEquals(0.0, stats.hitRate());
assertEquals(1, stats.missCount());
assertEquals(1.0, stats.missRate());
assertEquals(2, stats.requestCount());
assertEquals(1, stats.hitCount());
assertEquals(1.0 / 2, stats.hitRate());
assertEquals(1, stats.missCount());
assertEquals(1.0 / 2, stats.missRate());
assertEquals(3, stats.requestCount());
assertEquals(1, stats.hitCount());
assertEquals(1.0 / 3, stats.hitRate());
assertEquals(2, stats.missCount());
assertEquals(2.0 / 3, stats.missRate());
assertEquals(4, stats.requestCount());
assertEquals(1, stats.hitCount());
assertEquals(1.0 / 4, stats.hitRate());
assertEquals(3, stats.missCount());
assertEquals(3.0 / 4, stats.missRate());

public void testEmptySimpleStats() {
 StatsCounter counter = new SimpleStatsCounter();
 CacheStats stats = counter.snapshot();
 assertEquals(0, stats.requestCount());
 assertEquals(0, stats.hitCount());
 assertEquals(1.0, stats.hitRate());
 assertEquals(0, stats.missCount());
 assertEquals(0.0, stats.missRate());
 assertEquals(0, stats.loadSuccessCount());
 assertEquals(0, stats.loadExceptionCount());
 assertEquals(0, stats.loadCount());
 assertEquals(0, stats.totalLoadTime());
 assertEquals(0.0, stats.averageLoadPenalty());
 assertEquals(0, stats.evictionCount());
}

public void testEmpty() {
 CacheStats stats = new CacheStats(0, 0, 0, 0, 0, 0);
 assertEquals(0, stats.requestCount());
 assertEquals(0, stats.hitCount());
 assertEquals(1.0, stats.hitRate());
 assertEquals(0, stats.missCount());
 assertEquals(0.0, stats.missRate());
 assertEquals(0, stats.loadSuccessCount());
 assertEquals(0, stats.loadExceptionCount());
 assertEquals(0.0, stats.loadExceptionRate());
 assertEquals(0, stats.loadCount());
 assertEquals(0, stats.totalLoadTime());
 assertEquals(0.0, stats.averageLoadPenalty());
 assertEquals(0, stats.evictionCount());
}

public void testSingle() {
 CacheStats stats = new CacheStats(11, 13, 17, 19, 23, 27);
 assertEquals(24, stats.requestCount());
 assertEquals(11, stats.hitCount());
 assertEquals(11.0 / 24, stats.hitRate());
 assertEquals(13, stats.missCount());
 assertEquals(13.0 / 24, stats.missRate());
 assertEquals(17, stats.loadSuccessCount());
 assertEquals(19, stats.loadExceptionCount());
 assertEquals(19.0 / 36, stats.loadExceptionRate());
 assertEquals(17 + 19, stats.loadCount());
 assertEquals(23, stats.totalLoadTime());
 assertEquals(23.0 / (17 + 19), stats.averageLoadPenalty());
 assertEquals(27, stats.evictionCount());
}

assertEquals(1, stats.requestCount());
assertEquals(0, stats.hitCount());
assertEquals(0.0, stats.hitRate());
assertEquals(1, stats.missCount());
assertEquals(1.0, stats.missRate());
assertEquals(2, stats.requestCount());
assertEquals(1, stats.hitCount());
assertEquals(1.0/2, stats.hitRate());
assertEquals(1, stats.missCount());
assertEquals(1.0/2, stats.missRate());
assertEquals(3, stats.requestCount());
assertEquals(1, stats.hitCount());
assertEquals(1.0/3, stats.hitRate());
assertEquals(2, stats.missCount());
assertEquals(2.0/3, stats.missRate());
assertEquals(4, stats.requestCount());
assertEquals(1, stats.hitCount());
assertEquals(1.0/4, stats.hitRate());
assertEquals(3, stats.missCount());
assertEquals(3.0/4, stats.missRate());

 public void testPlus() {
  CacheStats one = new CacheStats(11, 13, 15, 13, 11, 9);
  CacheStats two = new CacheStats(53, 47, 41, 39, 37, 35);

  CacheStats sum = two.plus(one);
  assertEquals(124, sum.requestCount());
  assertEquals(64, sum.hitCount());
  assertEquals(64.0 / 124, sum.hitRate());
  assertEquals(60, sum.missCount());
  assertEquals(60.0 / 124, sum.missRate());
  assertEquals(56, sum.loadSuccessCount());
  assertEquals(52, sum.loadExceptionCount());
  assertEquals(52.0 / 108, sum.loadExceptionRate());
  assertEquals(56 + 52, sum.loadCount());
  assertEquals(48, sum.totalLoadTime());
  assertEquals(48.0 / (56 + 52), sum.averageLoadPenalty());
  assertEquals(44, sum.evictionCount());

  assertEquals(sum, one.plus(two));
 }
}

public void testMinus() {
 CacheStats one = new CacheStats(11, 13, 17, 19, 23, 27);
 CacheStats two = new CacheStats(53, 47, 43, 41, 37, 31);
 CacheStats diff = two.minus(one);
 assertEquals(76, diff.requestCount());
 assertEquals(42, diff.hitCount());
 assertEquals(42.0 / 76, diff.hitRate());
 assertEquals(34, diff.missCount());
 assertEquals(34.0 / 76, diff.missRate());
 assertEquals(26, diff.loadSuccessCount());
 assertEquals(22, diff.loadExceptionCount());
 assertEquals(22.0 / 48, diff.loadExceptionRate());
 assertEquals(26 + 22, diff.loadCount());
 assertEquals(14, diff.totalLoadTime());
 assertEquals(14.0 / (26 + 22), diff.averageLoadPenalty());
 assertEquals(4, diff.evictionCount());
 assertEquals(new CacheStats(0, 0, 0, 0, 0, 0), one.minus(two));
}

assertEquals(requestCount, stats.requestCount());
assertEquals(11, stats.hitCount());
assertEquals(11.0 / requestCount, stats.hitRate());
int missCount = 23;
assertEquals(missCount, stats.missCount());

cacheStatistics.put("evictionCount", cacheStats.evictionCount());
cacheStatistics.put("hitCount", cacheStats.hitCount());
cacheStatistics.put("hitRate", cacheStats.hitRate());
cacheStatistics.put("loadCount", cacheStats.loadCount());
cacheStatistics.put("loadExceptionCount", cacheStats.loadExceptionCount());

LOGGER.info("JTS Geometry cache hit rate: " + stats.hitRate());
LOGGER.info("JTS Geometry total load time: " + stats.totalLoadTime() / 1000);

  @Override
  public Double getValue() {
    return cache.stats().hitRate();
  }
});

  @Override
  public Double getValue() {
    return cache.stats().hitRate();
  }
});

@Managed
public Double getHitRate()
{
  return loadingCache.stats().hitRate();
}

@Managed
public Double getHitRate()
{
  return loadingCache.stats().hitRate();
}

  /**
   * Prints the cache.
   */
  public void printCache() {
    final CacheStats stats = countryCache.stats();
    if (LOG.isInfoEnabled()) {
      LOG.info("Hit count=" + stats.hitCount() + " rate=" + stats.hitRate() + "  Miss count=" + stats.missCount() + " rate=" + stats
        .missRate());
    }
  }
}

  @Override
  public void run() {
    CacheStats cacheStats = cacheResource.getCacheStats().minus(relativeCacheStats);
    String csvStats = String.format("%.3f, %.3f, %d %n", cacheStats.hitRate(), cacheStats.averageLoadPenalty(), cacheStats.evictionCount());
    try {
      com.google.common.io.Files.append(csvStats, cacheLog, Charset.defaultCharset());
    } catch (IOException e) {
    }
  }
}, 0, DEFAULT_LOGGING_DELAY, TimeUnit.SECONDS);

  @Override
  public void run() {
    CacheStats cacheStats = cacheResource.getCacheStats().minus(relativeCacheStats);
    String csvStats = String.format("%.3f, %.3f, %d %n", cacheStats.hitRate(), cacheStats.averageLoadPenalty(), cacheStats.evictionCount());
    try {
      com.google.common.io.Files.append(csvStats, cacheLog, Charset.defaultCharset());
    } catch (IOException e) {
    }
  }
}, 0, DEFAULT_LOGGING_DELAY, TimeUnit.SECONDS);