public Histogram histogram()

in geronimo-metrics-common/src/main/java/org/apache/geronimo/microprofile/metrics/common/RegistryImpl.java [277:291]

• 15 lines of code
• 5 McCabe index (conditional complexity)

    public Histogram histogram(final Metadata metadata, final Tag... tags) {
        final MetricID metricID = new MetricID(metadata.getName(), tags);
        Holder<? extends Metric> holder = metrics.get(metricID);
        if (holder == null) {
            holder = new Holder<>(new HistogramImpl(metadata.getUnit() == null ? MetricUnits.NONE : metadata.getUnit()), enforceType(metadata, MetricType.HISTOGRAM), metricID);
            final Holder<? extends Metric> existing = metrics.putIfAbsent(metricID, holder);
            if (existing != null) {
                holder = existing;
            }
        }
        if (!Histogram.class.isInstance(holder.metric)) {
            throw new IllegalArgumentException(holder.metric + " is not a histogram");
        }
        return Histogram.class.cast(holder.metric);
    }