/**
   * Tests that we are in {@link GemFireHealth#OKAY_HEALTH okay} health if cache loads take too
   * long.
   *
   * @see CacheHealthEvaluator#checkLoadTime
   */
  public void testCheckLoadTime() throws CacheException {
    Cache cache = CacheFactory.create(this.system);
    CachePerfStats stats = ((GemFireCacheImpl) cache).getCachePerfStats();

    AttributesFactory factory = new AttributesFactory();
    factory.setScope(Scope.LOCAL);
    factory.setCacheLoader(
        new CacheLoader() {
          public Object load(LoaderHelper helper) throws CacheLoaderException {

            return "Loaded";
          }

          public void close() {}
        });

    RegionAttributes attrs = factory.create();
    Region region = cache.createRegion(this.getName(), attrs);

    GemFireHealthConfig config = new GemFireHealthConfigImpl(null);
    config.setMaxLoadTime(100);

    CacheHealthEvaluator eval =
        new CacheHealthEvaluator(config, this.system.getDistributionManager());
    for (int i = 0; i < 10; i++) {
      region.get("Test1 " + i);
    }
    long firstLoadTime = stats.getLoadTime();
    long firstLoadsCompleted = stats.getLoadsCompleted();
    assertTrue(firstLoadTime >= 0);
    assertTrue(firstLoadsCompleted > 0);

    // First time should always be empty
    List status = new ArrayList();
    eval.evaluate(status);
    assertEquals(0, status.size());

    config = new GemFireHealthConfigImpl(null);
    config.setMaxLoadTime(10);
    eval = new CacheHealthEvaluator(config, this.system.getDistributionManager());
    eval.evaluate(status);

    long start = System.currentTimeMillis();
    for (int i = 0; i < 100; i++) {
      region.get("Test2 " + i);
    }
    assertTrue(System.currentTimeMillis() - start < 1000);
    long secondLoadTime = stats.getLoadTime();
    long secondLoadsCompleted = stats.getLoadsCompleted();
    assertTrue(
        "firstLoadTime=" + firstLoadTime + ", secondLoadTime=" + secondLoadTime,
        secondLoadTime >= firstLoadTime);
    assertTrue(secondLoadsCompleted > firstLoadsCompleted);

    // Averge should be less than 10 milliseconds
    status = new ArrayList();
    eval.evaluate(status);
    assertEquals(0, status.size());

    region
        .getAttributesMutator()
        .setCacheLoader(
            new CacheLoader() {
              public Object load(LoaderHelper helper) throws CacheLoaderException {

                try {
                  Thread.sleep(20);

                } catch (InterruptedException ex) {
                  fail("Why was I interrupted?");
                }
                return "Loaded";
              }

              public void close() {}
            });

    for (int i = 0; i < 50; i++) {
      region.get("Test3 " + i);
    }

    long thirdLoadTime = stats.getLoadTime();
    long thirdLoadsCompleted = stats.getLoadsCompleted();
    assertTrue(thirdLoadTime > secondLoadTime);
    assertTrue(thirdLoadsCompleted > secondLoadsCompleted);

    status = new ArrayList();
    eval.evaluate(status);
    assertEquals(1, status.size());

    AbstractHealthEvaluator.HealthStatus ill = (AbstractHealthEvaluator.HealthStatus) status.get(0);
    assertEquals(GemFireHealth.OKAY_HEALTH, ill.getHealthCode());
    String s = "The average duration of a Cache load";
    assertTrue(ill.getDiagnosis().indexOf(s) != -1);
  }
  /**
   * Tests that we are in {@link GemFireHealth#OKAY_HEALTH okay} health if the hit ratio dips below
   * the threshold.
   */
  public void testCheckHitRatio() throws CacheException {
    Cache cache = CacheFactory.create(this.system);
    //    CachePerfStats stats = ((GemFireCache) cache).getCachePerfStats();

    AttributesFactory factory = new AttributesFactory();
    factory.setScope(Scope.LOCAL);
    factory.setCacheLoader(
        new CacheLoader() {
          public Object load(LoaderHelper helper) throws CacheLoaderException {

            return "Loaded";
          }

          public void close() {}
        });

    RegionAttributes attrs = factory.create();
    Region region = cache.createRegion(this.getName(), attrs);

    GemFireHealthConfig config = new GemFireHealthConfigImpl(null);
    config.setMinHitRatio(0.5);

    CacheHealthEvaluator eval =
        new CacheHealthEvaluator(config, this.system.getDistributionManager());
    List status = new ArrayList();
    eval.evaluate(status);
    assertEquals(0, status.size());

    region.get("One");
    region.get("One");
    region.get("One");

    status = new ArrayList();
    eval.evaluate(status);
    assertEquals(0, status.size());

    for (int i = 0; i < 50; i++) {
      region.get("Miss " + i);
    }

    status = new ArrayList();
    eval.evaluate(status);

    AbstractHealthEvaluator.HealthStatus ill = (AbstractHealthEvaluator.HealthStatus) status.get(0);
    assertEquals(GemFireHealth.OKAY_HEALTH, ill.getHealthCode());
    String s = "The hit ratio of this Cache";
    assertTrue(ill.getDiagnosis().indexOf(s) != -1);
  }