| package net.onrc.onos.core.metrics; |
| |
| import com.codahale.metrics.Counter; |
| import com.codahale.metrics.Gauge; |
| import com.codahale.metrics.Histogram; |
| import com.codahale.metrics.Meter; |
| import com.codahale.metrics.Metric; |
| import com.codahale.metrics.MetricFilter; |
| import com.codahale.metrics.MetricRegistry; |
| import com.codahale.metrics.Timer; |
| |
| import java.util.Map; |
| |
| /** |
| * This class acts a singleton to hold the Metrics registry for ONOS. |
| */ |
| public final class OnosMetrics { |
| |
| /** |
| * Hide constructor. The only way to get the registry is through the |
| * singleton getter. |
| */ |
| private OnosMetrics() {} |
| |
| /** |
| * Components that can hold Metrics. This is used as the first part of |
| * a Metric's name. |
| */ |
| public enum MetricsComponents { |
| /** |
| * Global scope, not associated with a particular component. |
| */ |
| GLOBAL("Global"), |
| |
| /** |
| * Topology component. |
| */ |
| TOPOLOGY("Topology"); |
| |
| private final String name; |
| |
| /** |
| * Constructor allows specifying an alternate string name. |
| * |
| * @param name string for the name of the component |
| */ |
| private MetricsComponents(String name) { |
| this.name = name; |
| } |
| |
| @Override |
| public String toString() { |
| return name; |
| } |
| } |
| |
| /** |
| * Features that can hold Metrics. This is used as the second part of |
| * a Metric's name. |
| */ |
| public enum MetricsFeatures { |
| /** |
| * Global scope, not associated with a particular feature. |
| */ |
| GLOBAL("Global"), |
| |
| /** |
| * Topology Intents Framework feature. (example) |
| */ |
| TOPOLOGY_INTENTS("IntentsFramework"); |
| |
| private final String name; |
| |
| /** |
| * Constructor allows specifying an alternate string name. |
| * |
| * @param name string for the name of the component |
| */ |
| private MetricsFeatures(String name) { |
| this.name = name; |
| } |
| |
| @Override |
| public String toString() { |
| return name; |
| } |
| } |
| |
| private static final MetricRegistry METRICS_REGISTRY = new MetricRegistry(); |
| |
| /** |
| * Generates a name for a Metric from its component and feature. |
| * |
| * @param component component the metric is defined in |
| * @param feature feature the metric is defined in |
| * @param metricName local name of the metric |
| * |
| * @return full name of the metric |
| */ |
| public static String generateName(final MetricsComponents component, |
| final MetricsFeatures feature, |
| final String metricName) { |
| return MetricRegistry.name(component.toString(), |
| feature.toString(), |
| metricName); |
| } |
| |
| /** |
| * Creates a Counter metric. |
| * |
| * @param component component the Counter is defined in |
| * @param feature feature the Counter is defined in |
| * @param metricName local name of the metric |
| * @return Counter Meteric |
| */ |
| public static Counter createCounter(final MetricsComponents component, |
| final MetricsFeatures feature, |
| final String metricName) { |
| final String name = generateName(component, feature, metricName); |
| return METRICS_REGISTRY.counter(name); |
| } |
| |
| /** |
| * Creates a Histogram metric. |
| * |
| * @param component component the Histogram is defined in |
| * @param feature feature the Histogram is defined in |
| * @param metricName local name of the metric |
| * @return Histogram Metric |
| */ |
| public static Histogram createHistogram(final MetricsComponents component, |
| final MetricsFeatures feature, |
| final String metricName) { |
| final String name = generateName(component, feature, metricName); |
| return METRICS_REGISTRY.histogram(name); |
| } |
| |
| /** |
| * Creates a Timer metric. |
| * |
| * @param component component the Timer is defined in |
| * @param feature feature the Timeer is defined in |
| * @param metricName local name of the metric |
| * @return Timer Metric |
| */ |
| public static Timer createTimer(final MetricsComponents component, |
| final MetricsFeatures feature, |
| final String metricName) { |
| final String name = generateName(component, feature, metricName); |
| return METRICS_REGISTRY.timer(name); |
| } |
| |
| /** |
| * Creates a Meter metric. |
| * |
| * @param component component the Meter is defined in |
| * @param feature feature the Meter is defined in |
| * @param metricName local name of the metric |
| * @return Meter Metric |
| */ |
| public static Meter createMeter(final MetricsComponents component, |
| final MetricsFeatures feature, |
| final String metricName) { |
| final String name = generateName(component, feature, metricName); |
| return METRICS_REGISTRY.meter(name); |
| } |
| |
| /** |
| * Registers an already created Metric. This is used for situation where a |
| * caller needs to allocate its own Metric, but still register it with the |
| * system. |
| * |
| * @param component component the Metric is defined in |
| * @param feature feature the metric is defined in |
| * @param metricName local name of the metric |
| * @param metric Metric to register |
| */ |
| public static void registerMetric(final MetricsComponents component, |
| final MetricsFeatures feature, |
| final String metricName, |
| final Metric metric) { |
| final String name = generateName(component, feature, metricName); |
| METRICS_REGISTRY.register(name, metric); |
| } |
| |
| /** |
| * Fetches the existing Timers. |
| * |
| * @param filter filter to use to select Timers |
| * @return a map of the Timers that match the filter, with the key as the |
| * name String to the Timer. |
| */ |
| public static Map<String, Timer> getTimers(final MetricFilter filter) { |
| return METRICS_REGISTRY.getTimers(filter); |
| } |
| |
| /** |
| * Fetches the existing Gauges. |
| * |
| * @param filter filter to use to select Gauges |
| * @return a map of the Gauges that match the filter, with the key as the |
| * name String to the Gauge. |
| */ |
| @SuppressWarnings("rawtypes") |
| public static Map<String, Gauge> getGauges(final MetricFilter filter) { |
| return METRICS_REGISTRY.getGauges(filter); |
| } |
| |
| /** |
| * Fetches the existing Counters. |
| * |
| * @param filter filter to use to select Counters |
| * @return a map of the Counters that match the filter, with the key as the |
| * name String to the Counter. |
| */ |
| public static Map<String, Counter> getCounters(final MetricFilter filter) { |
| return METRICS_REGISTRY.getCounters(filter); |
| } |
| |
| /** |
| * Fetches the existing Meters. |
| * |
| * @param filter filter to use to select Meters |
| * @return a map of the Meters that match the filter, with the key as the |
| * name String to the Meter. |
| */ |
| public static Map<String, Meter> getMeters(final MetricFilter filter) { |
| return METRICS_REGISTRY.getMeters(filter); |
| } |
| |
| /** |
| * Fetches the existing Histograms. |
| * |
| * @param filter filter to use to select Histograms |
| * @return a map of the Histograms that match the filter, with the key as the |
| * name String to the Histogram. |
| */ |
| public static Map<String, Histogram> getHistograms(final MetricFilter filter) { |
| return METRICS_REGISTRY.getHistograms(filter); |
| } |
| |
| /** |
| * Removes all Metrics that match a given filter. |
| * |
| * @param filter filter to use to select the Metrics to remove. |
| */ |
| public static void removeMatching(final MetricFilter filter) { |
| METRICS_REGISTRY.removeMatching(filter); |
| } |
| } |
| |