/*
* 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.
*/
/*
* Forked from https://github.com/codahale/metrics
*/
package org.apache.solr.util.stats;
import java.util.concurrent.TimeUnit;
/**
* A timing context.
*
* @see Timer#time()
*/
public class TimerContext {
private final Timer timer;
private final Clock clock;
private final long startTime;
/**
* Creates a new {@link TimerContext} with the current time as its starting value and with the
* given {@link Timer}.
*
* @param timer the {@link Timer} to report the elapsed time to
*/
TimerContext(Timer timer, Clock clock) {
this.timer = timer;
this.clock = clock;
this.startTime = clock.getTick();
}
/**
* Stops recording the elapsed time, updates the timer and returns the elapsed time
*/
public long stop() {
final long elapsedNanos = clock.getTick() - startTime;
timer.update(elapsedNanos, TimeUnit.NANOSECONDS);
return elapsedNanos;
}
}