34 lines
978 B
Go
34 lines
978 B
Go
|
// 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"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Timer accumulates observations about how long some operation took,
|
||
|
|
// and also maintains a historgam of percentiles.
|
||
|
|
type Timer interface {
|
||
|
|
// Records the time passed in.
|
||
|
|
Record(time.Duration)
|
||
|
|
}
|
||
|
|
|
||
|
|
// NullTimer timer that does nothing
|
||
|
|
var NullTimer Timer = nullTimer{}
|
||
|
|
|
||
|
|
type nullTimer struct{}
|
||
|
|
|
||
|
|
func (nullTimer) Record(time.Duration) {}
|