pankaj | 390abbc | 2014-10-01 17:01:05 -0700 | [diff] [blame^] | 1 | package org.onlab.metrics; |
| 2 | |
| 3 | import java.util.concurrent.ConcurrentHashMap; |
| 4 | import java.util.concurrent.ConcurrentMap; |
| 5 | |
| 6 | /** |
| 7 | * Components to register for metrics. |
| 8 | */ |
| 9 | public class MetricsComponent implements MetricsComponentRegistry { |
| 10 | private final String name; |
| 11 | |
| 12 | /** |
| 13 | * Registry to hold the Features defined in this Component. |
| 14 | */ |
| 15 | private final ConcurrentMap<String, MetricsFeature> featuresRegistry = |
| 16 | new ConcurrentHashMap<>(); |
| 17 | |
| 18 | /** |
| 19 | * Constructs a component from a name. |
| 20 | * |
| 21 | * @param newName name of the component |
| 22 | */ |
| 23 | MetricsComponent(final String newName) { |
| 24 | name = newName; |
| 25 | } |
| 26 | |
| 27 | @Override public String getName() { |
| 28 | return name; |
| 29 | } |
| 30 | |
| 31 | @Override public MetricsFeature registerFeature(final String featureName) { |
| 32 | MetricsFeature feature = featuresRegistry.get(featureName); |
| 33 | if (feature == null) { |
| 34 | final MetricsFeature createdFeature = new MetricsFeature(featureName); |
| 35 | feature = featuresRegistry.putIfAbsent(featureName, createdFeature); |
| 36 | if (feature == null) { |
| 37 | feature = createdFeature; |
| 38 | } |
| 39 | } |
| 40 | return feature; |
| 41 | } |
| 42 | } |