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Signed-off-by: Zhang Kang <kang.zhang@intel.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| /* | ||
| Copyright 2022 The Koordinator 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 nri | ||
|
|
||
| import "time" | ||
|
|
||
| type Backoff struct { | ||
| initInterval time.Duration | ||
| maxInterval time.Duration | ||
| multiplier float64 | ||
| } | ||
|
|
||
| func NewBackOff(initInterval, maxInterval time.Duration, mul float64) Backoff { | ||
| return Backoff{ | ||
| initInterval: initInterval, | ||
| maxInterval: maxInterval, | ||
| multiplier: mul, | ||
| } | ||
| } | ||
|
|
||
| func (b Backoff) NextInterval(attempt int) time.Duration { | ||
| backoff := float64(b.initInterval) * (float64(attempt) * b.multiplier) | ||
| if backoff > float64(b.maxInterval) { | ||
| backoff = float64(b.maxInterval) | ||
| } | ||
| return time.Duration(backoff) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| /* | ||
| Copyright 2022 The Koordinator 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 nri | ||
|
|
||
| import ( | ||
| "reflect" | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| func TestBackoff_NextInterval(t *testing.T) { | ||
| type fields struct { | ||
| initInterval time.Duration | ||
| maxInterval time.Duration | ||
| multiplier float64 | ||
| } | ||
| type args struct { | ||
| attempt int | ||
| } | ||
| tests := []struct { | ||
| name string | ||
| fields fields | ||
| args args | ||
| want time.Duration | ||
| }{ | ||
| { | ||
| name: "Test NextInterval backoff smaller than maxInterval", | ||
| fields: fields{ | ||
| initInterval: 10, | ||
| maxInterval: 100, | ||
| multiplier: 2, | ||
| }, | ||
| args: args{attempt: 2}, | ||
| want: time.Duration(40), | ||
| }, | ||
| { | ||
| name: "Test NextInterval backoff larger than maxInterval", | ||
| fields: fields{ | ||
| initInterval: 10, | ||
| maxInterval: 100, | ||
| multiplier: 2, | ||
| }, | ||
| args: args{attempt: 10}, | ||
| want: time.Duration(100), | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| b := Backoff{ | ||
| initInterval: tt.fields.initInterval, | ||
| maxInterval: tt.fields.maxInterval, | ||
| multiplier: tt.fields.multiplier, | ||
| } | ||
| if got := b.NextInterval(tt.args.attempt); got != tt.want { | ||
| t.Errorf("NextInterval() = %v, want %v", got, tt.want) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func TestNewBackOff(t *testing.T) { | ||
| type args struct { | ||
| initInterval time.Duration | ||
| maxInterval time.Duration | ||
| mul float64 | ||
| } | ||
| tests := []struct { | ||
| name string | ||
| args args | ||
| want Backoff | ||
| }{ | ||
| // TODO: Add test cases. | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| if got := NewBackOff(tt.args.initInterval, tt.args.maxInterval, tt.args.mul); !reflect.DeepEqual(got, tt.want) { | ||
| t.Errorf("NewBackOff() = %v, want %v", got, tt.want) | ||
| } | ||
| }) | ||
| } | ||
| } |
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