com.netflix.spectator.api.Meter Maven / Gradle / Ivy
/*
* Copyright 2014-2019 Netflix, 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.netflix.spectator.api;
/**
* A device for collecting a set of measurements. Note, this interface is only intended to be
* implemented by registry implementations.
*/
public interface Meter {
/**
* Identifier used to lookup this meter in the registry.
*/
Id id();
/**
* Get the set of measurements for this meter.
*/
Iterable measure();
/**
* Indicates whether the meter is expired. For example, a counter might expire if there is no
* activity within a given time frame.
*/
boolean hasExpired();
}