How to use

getOrSet

method

in

io.pravega.shared.metrics.StatsLoggerProxy

@Override
public OpStatsLogger createStats(String name) {
  return getOrSet(this.opStatsLoggers, name, this.statsLoggerRef.get()::createStats, OpStatsLoggerProxy::new);
}

@Override
public Counter createCounter(String name) {
  return getOrSet(this.counters, name, this.statsLoggerRef.get()::createCounter, CounterProxy::new);
}

@Override
public Meter createMeter(String name) {
  return getOrSet(this.meters, name, this.statsLoggerRef.get()::createMeter, MeterProxy::new);
}

@Override
public <T extends Number> Gauge registerGauge(String name, Supplier<T> value) {
  return getOrSet(this.gauges, name,
      metricName -> this.statsLoggerRef.get().registerGauge(metricName, value),
      (metric, proxyName, c) -> new GaugeProxy(metric, proxyName, value, c));
}