blob: 3c606391a095089cbf3007a5b3de339524cc0d58 [file] [log] [blame]
mpagenkoaf801632020-07-03 10:00:42 +00001// Copyright (c) 2017 Uber Technologies, Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15package metrics
16
17// Gauge returns instantaneous measurements of something as an int64 value
18type Gauge interface {
19 // Update the gauge to the value passed in.
20 Update(int64)
21}
22
23// NullGauge gauge that does nothing
24var NullGauge Gauge = nullGauge{}
25
26type nullGauge struct{}
27
28func (nullGauge) Update(int64) {}