ratis-metrics-default/src/main/java/org/apache/ratis/metrics/impl/RatisMetricRegistryImpl.java [70:157]:
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  static LongCounter toLongCounter(Counter c) {
    return new LongCounter() {
      @Override
      public void inc(long n) {
        c.inc(n);
      }

      @Override
      public void dec(long n) {
        c.dec(n);
      }

      @Override
      public long getCount() {
        return c.getCount();
      }
    };
  }

  @Override
  public LongCounter counter(String name) {
    return toLongCounter(metricRegistry.counter(getMetricName(name)));
  }

  @Override
  public boolean remove(String name) {
    return metricRegistry.remove(getMetricName(name));
  }

  static <T> Gauge<T> toGauge(Supplier<T> supplier) {
    return supplier::get;
  }

  @Override
  public <T> void gauge(String name, Supplier<Supplier<T>> gaugeSupplier) {
    metricRegistry.gauge(getMetricName(name), () -> toGauge(gaugeSupplier.get()));
  }

  public SortedMap<String, Gauge> getGauges(MetricFilter filter) {
    return metricRegistry.getGauges(filter);
  }

  @VisibleForTesting
  public Metric get(String shortName) {
    return metricRegistry.getMetrics().get(getMetricName(shortName));
  }

  private String getMetricName(String shortName) {
    return metricNameCache.computeIfAbsent(shortName, key -> MetricRegistry.name(namePrefix, shortName));
  }

  private <T extends Metric> T register(String name, T metric) throws IllegalArgumentException {
    return metricRegistry.register(getMetricName(name), metric);
  }


  public MetricRegistry getDropWizardMetricRegistry() {
    return metricRegistry;
  }

  @Override public MetricRegistryInfo getMetricRegistryInfo(){
    return this.info;
  }

  void registerAll(String prefix, MetricSet metricSet) {
    for (Map.Entry<String, Metric> entry : metricSet.getMetrics().entrySet()) {
      if (entry.getValue() instanceof MetricSet) {
        registerAll(prefix + "." + entry.getKey(), (MetricSet) entry.getValue());
      } else {
        register(prefix + "." + entry.getKey(), entry.getValue());
      }
    }
  }

  void setJmxReporter(JmxReporter jmxReporter) {
    this.jmxReporter = jmxReporter;
  }

  JmxReporter getJmxReporter() {
    return this.jmxReporter;
  }

  void setConsoleReporter(ConsoleReporter consoleReporter) {
    this.consoleReporter = consoleReporter;
  }

  ConsoleReporter getConsoleReporter() {
    return this.consoleReporter;
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ratis-metrics-dropwizard3/src/main/java/org/apache/ratis/metrics/dropwizard3/Dm3RatisMetricRegistryImpl.java [71:158]:
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  static LongCounter toLongCounter(Counter c) {
    return new LongCounter() {
      @Override
      public void inc(long n) {
        c.inc(n);
      }

      @Override
      public void dec(long n) {
        c.dec(n);
      }

      @Override
      public long getCount() {
        return c.getCount();
      }
    };
  }

  @Override
  public LongCounter counter(String name) {
    return toLongCounter(metricRegistry.counter(getMetricName(name)));
  }

  @Override
  public boolean remove(String name) {
    return metricRegistry.remove(getMetricName(name));
  }

  static <T> Gauge<T> toGauge(Supplier<T> supplier) {
    return supplier::get;
  }

  @Override
  public <T> void gauge(String name, Supplier<Supplier<T>> gaugeSupplier) {
    metricRegistry.gauge(getMetricName(name), () -> toGauge(gaugeSupplier.get()));
  }

  public SortedMap<String, Gauge> getGauges(MetricFilter filter) {
    return metricRegistry.getGauges(filter);
  }

  @VisibleForTesting
  public Metric get(String shortName) {
    return metricRegistry.getMetrics().get(getMetricName(shortName));
  }

  private String getMetricName(String shortName) {
    return metricNameCache.computeIfAbsent(shortName, key -> MetricRegistry.name(namePrefix, shortName));
  }

  private <T extends Metric> T register(String name, T metric) throws IllegalArgumentException {
    return metricRegistry.register(getMetricName(name), metric);
  }


  public MetricRegistry getDropWizardMetricRegistry() {
    return metricRegistry;
  }

  @Override public MetricRegistryInfo getMetricRegistryInfo(){
    return this.info;
  }

  void registerAll(String prefix, MetricSet metricSet) {
    for (Map.Entry<String, Metric> entry : metricSet.getMetrics().entrySet()) {
      if (entry.getValue() instanceof MetricSet) {
        registerAll(prefix + "." + entry.getKey(), (MetricSet) entry.getValue());
      } else {
        register(prefix + "." + entry.getKey(), entry.getValue());
      }
    }
  }

  void setJmxReporter(JmxReporter jmxReporter) {
    this.jmxReporter = jmxReporter;
  }

  JmxReporter getJmxReporter() {
    return this.jmxReporter;
  }

  void setConsoleReporter(ConsoleReporter consoleReporter) {
    this.consoleReporter = consoleReporter;
  }

  ConsoleReporter getConsoleReporter() {
    return this.consoleReporter;
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