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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.onosproject.core;
import org.onlab.metrics.MetricsComponent;
import org.onlab.metrics.MetricsFeature;
import org.onlab.metrics.MetricsService;
import com.codahale.metrics.Timer;
/**
* Collection of utility methods used for providing Metrics.
*/
public interface MetricsHelper {
/**
* Returns MetricService instance.
*
* @return MetricService instance
*/
MetricsService metricsService();
/**
* Creates a Timer instance with given name.
*
* @param component component name
* @param feature feature name
* @param name timer name
* @return Timer instance
*/
default Timer createTimer(String component, String feature, String name) {
final MetricsService metricsService = metricsService();
if (metricsService != null) {
MetricsComponent c = metricsService.registerComponent(component);
MetricsFeature f = c.registerFeature(feature);
return metricsService.createTimer(c, f, name);
}
return null;
}
}
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