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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed 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;
}
}
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