| package org.onlab.metrics; |
| |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| /** |
| * Components to register for metrics. |
| */ |
| public class MetricsComponent implements MetricsComponentRegistry { |
| private final String name; |
| |
| /** |
| * Registry to hold the Features defined in this Component. |
| */ |
| private final ConcurrentMap<String, MetricsFeature> featuresRegistry = |
| new ConcurrentHashMap<>(); |
| |
| /** |
| * Constructs a component from a name. |
| * |
| * @param newName name of the component |
| */ |
| MetricsComponent(final String newName) { |
| name = newName; |
| } |
| |
| @Override public String getName() { |
| return name; |
| } |
| |
| @Override public MetricsFeature registerFeature(final String featureName) { |
| MetricsFeature feature = featuresRegistry.get(featureName); |
| if (feature == null) { |
| final MetricsFeature createdFeature = new MetricsFeature(featureName); |
| feature = featuresRegistry.putIfAbsent(featureName, createdFeature); |
| if (feature == null) { |
| feature = createdFeature; |
| } |
| } |
| return feature; |
| } |
| } |