blob: 2a6a43efdb458629465bbf1fbf6b7b300c466b31 [file] [log] [blame]
Matteo Scandoloa4285862020-12-01 18:10:10 -08001// 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// Counter tracks the number of times an event has occurred
18type Counter interface {
19 // Inc adds the given value to the counter.
20 Inc(int64)
21}
22
23// NullCounter counter that does nothing
24var NullCounter Counter = nullCounter{}
25
26type nullCounter struct{}
27
28func (nullCounter) Inc(int64) {}