private void notifyMetricRemoved(MetricName name) {
for (MetricsRegistryListener listener : listeners) {
listener.onMetricRemoved(name);
}
}
private void notifyMetricAdded(MetricName name, Metric metric) {
for (MetricsRegistryListener listener : listeners) {
listener.onMetricAdded(name, metric);
}
}
/**
* Adds a {@link MetricsRegistryListener} to a collection of listeners that will be notified on
* metric creation. Listeners will be notified in the order in which they are added.
*
* <p><b>N.B.:</b> The listener will be notified of all existing metrics when it first registers.
*
* @param listener the listener that will be notified
*/
public void addListener(MetricsRegistryListener listener) {
listeners.add(listener);
for (Map.Entry<MetricName, Metric> entry : metrics.entrySet()) {
listener.onMetricAdded(entry.getKey(), entry.getValue());
}
}