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khenaidooc6c7bda2020-06-17 17:20:18 -04001// 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
17import (
18 "time"
19)
20
21// StartStopwatch begins recording the executing time of an event, returning
22// a Stopwatch that should be used to stop the recording the time for
23// that event. Multiple events can be occurring simultaneously each
24// represented by different active Stopwatches
25func StartStopwatch(timer Timer) Stopwatch {
26 return Stopwatch{t: timer, start: time.Now()}
27}
28
29// A Stopwatch tracks the execution time of a specific event
30type Stopwatch struct {
31 t Timer
32 start time.Time
33}
34
35// Stop stops executing of the stopwatch and records the amount of elapsed time
36func (s Stopwatch) Stop() {
37 s.t.Record(s.ElapsedTime())
38}
39
40// ElapsedTime returns the amount of elapsed time (in time.Duration)
41func (s Stopwatch) ElapsedTime() time.Duration {
42 return time.Since(s.start)
43}