| /* |
| * Copyright 2014-present 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 com.codahale.metrics.Timer; |
| import com.codahale.metrics.Timer.Context; |
| |
| public final class MetricsUtil { |
| |
| /** |
| * Starts the Metric Timer. |
| * <p> |
| * If the given timer was null, it will silently return null. |
| * </p> |
| * |
| * @param timer timer to start |
| * @return timing context, if timer was not null |
| */ |
| public static Context startTimer(Timer timer) { |
| if (timer != null) { |
| return timer.time(); |
| } |
| return null; |
| } |
| |
| /** |
| * Stops the Metric Timer context. |
| * <p> |
| * If the given context was null, it will silently be ignored. |
| * </p> |
| * |
| * @param context timing context to stop, if not null. |
| */ |
| public static void stopTimer(Context context) { |
| if (context != null) { |
| context.stop(); |
| } |
| } |
| |
| // avoid instantiation |
| private MetricsUtil() {} |
| } |