28 lines
903 B
Go
28 lines
903 B
Go
// Copyright (c) 2018 The Jaeger Authors
|
|
//
|
|
// 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
|
|
|
|
// Histogram that keeps track of a distribution of values.
|
|
type Histogram interface {
|
|
// Records the value passed in.
|
|
Record(float64)
|
|
}
|
|
|
|
// NullHistogram that does nothing
|
|
var NullHistogram Histogram = nullHistogram{}
|
|
|
|
type nullHistogram struct{}
|
|
|
|
func (nullHistogram) Record(float64) {}
|