53 lines
1.7 KiB
Go
53 lines
1.7 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package metrics
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// TimedObserver gets informed about the values assigned to a variable
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// `X float64` over time, and reports on the ratio `X/X1`.
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type TimedObserver interface {
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// Add notes a change to the variable
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Add(deltaX float64)
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// Set notes a setting of the variable
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Set(x float64)
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// SetX1 changes the value to use for X1
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SetX1(x1 float64)
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}
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// TimedObserverGenerator creates related observers that are
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// differentiated by a series of label values
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type TimedObserverGenerator interface {
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Generate(x, x1 float64, labelValues []string) TimedObserver
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}
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// TimedObserverPair is a corresponding pair of observers, one for the
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// number of requests waiting in queue(s) and one for the number of
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// requests being executed
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type TimedObserverPair struct {
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// RequestsWaiting is given observations of the number of currently queued requests
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RequestsWaiting TimedObserver
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// RequestsExecuting is given observations of the number of requests currently executing
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RequestsExecuting TimedObserver
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}
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// TimedObserverPairGenerator generates pairs
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type TimedObserverPairGenerator interface {
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Generate(waiting1, executing1 float64, labelValues []string) TimedObserverPair
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}
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