| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| 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; |
| } |
| } |