/*
* Copyright (C) 2012 Facebook, Inc.
*
* 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 com.facebook.stats;
/**
* Like an EventCounter but with additional functionality and
* additional overhead.
*/
public interface GaugeCounter extends EventCounterIf<GaugeCounter> {
/**
* Number of times add(long delta) has be called.
*/
public long getSamples();
/**
* Average value of delta for calls to add(long delta).
*/
public long getAverage();
/**
* Like add(delta) but used for merging with other GaugeCounters.
*/
public void add(long delta, long nsamples);
}