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- // Copyright (c) 2017 Uber Technologies, 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 metrics
- import (
- "time"
- )
- // StartStopwatch begins recording the executing time of an event, returning
- // a Stopwatch that should be used to stop the recording the time for
- // that event. Multiple events can be occurring simultaneously each
- // represented by different active Stopwatches
- func StartStopwatch(timer Timer) Stopwatch {
- return Stopwatch{t: timer, start: time.Now()}
- }
- // A Stopwatch tracks the execution time of a specific event
- type Stopwatch struct {
- t Timer
- start time.Time
- }
- // Stop stops executing of the stopwatch and records the amount of elapsed time
- func (s Stopwatch) Stop() {
- s.t.Record(s.ElapsedTime())
- }
- // ElapsedTime returns the amount of elapsed time (in time.Duration)
- func (s Stopwatch) ElapsedTime() time.Duration {
- return time.Since(s.start)
- }
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