Thomas Vachuska | 24c849c | 2014-10-27 09:53:05 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
| 3 | * or more contributor license agreements. See the NOTICE file |
| 4 | * distributed with this work for additional information |
| 5 | * regarding copyright ownership. The ASF licenses this file |
| 6 | * to you under the Apache License, Version 2.0 (the |
| 7 | * "License"); you may not use this file except in compliance |
| 8 | * with the License. You may obtain a copy of the License at |
| 9 | * |
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | * |
| 12 | * Unless required by applicable law or agreed to in writing, |
| 13 | * software distributed under the License is distributed on an |
| 14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | * KIND, either express or implied. See the License for the |
| 16 | * specific language governing permissions and limitations |
| 17 | * under the License. |
| 18 | */ |
pankaj | 390abbc | 2014-10-01 17:01:05 -0700 | [diff] [blame] | 19 | package org.onlab.metrics; |
| 20 | |
| 21 | import java.util.concurrent.ConcurrentHashMap; |
| 22 | import java.util.concurrent.ConcurrentMap; |
| 23 | |
| 24 | /** |
| 25 | * Components to register for metrics. |
| 26 | */ |
| 27 | public class MetricsComponent implements MetricsComponentRegistry { |
| 28 | private final String name; |
| 29 | |
| 30 | /** |
| 31 | * Registry to hold the Features defined in this Component. |
| 32 | */ |
| 33 | private final ConcurrentMap<String, MetricsFeature> featuresRegistry = |
| 34 | new ConcurrentHashMap<>(); |
| 35 | |
| 36 | /** |
| 37 | * Constructs a component from a name. |
| 38 | * |
| 39 | * @param newName name of the component |
| 40 | */ |
| 41 | MetricsComponent(final String newName) { |
| 42 | name = newName; |
| 43 | } |
| 44 | |
Pavlin Radoslavov | df042bd | 2014-10-21 21:46:46 -0700 | [diff] [blame] | 45 | @Override |
| 46 | public String getName() { |
pankaj | 390abbc | 2014-10-01 17:01:05 -0700 | [diff] [blame] | 47 | return name; |
| 48 | } |
| 49 | |
Pavlin Radoslavov | df042bd | 2014-10-21 21:46:46 -0700 | [diff] [blame] | 50 | @Override |
| 51 | public MetricsFeature registerFeature(final String featureName) { |
pankaj | 390abbc | 2014-10-01 17:01:05 -0700 | [diff] [blame] | 52 | MetricsFeature feature = featuresRegistry.get(featureName); |
| 53 | if (feature == null) { |
Pavlin Radoslavov | df042bd | 2014-10-21 21:46:46 -0700 | [diff] [blame] | 54 | final MetricsFeature createdFeature = |
| 55 | new MetricsFeature(featureName); |
pankaj | 390abbc | 2014-10-01 17:01:05 -0700 | [diff] [blame] | 56 | feature = featuresRegistry.putIfAbsent(featureName, createdFeature); |
| 57 | if (feature == null) { |
| 58 | feature = createdFeature; |
| 59 | } |
| 60 | } |
| 61 | return feature; |
| 62 | } |
| 63 | } |