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reservoir.go
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reservoir.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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
// A statistically representative reservoir of a data stream.
type Reservoir interface {
// Returns the number of values recorded.
Size() int
// Adds a new recorded value to the reservoir.
UpdateN(value int64)
// Returns a snapshot of the reservoir's values.
GetSnapshot() Snapshot
}
type ReservoirType int
const (
BucketReservoirType ReservoirType = iota
UniformReservoirType
ExponentiallyDecayingReservoirType
)