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retry.go
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retry.go
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/*
* Copyright 2020 The Dragonfly 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 retry
import (
"context"
"time"
"d7y.io/dragonfly/v2/pkg/math"
)
func Run(ctx context.Context,
initBackoff float64,
maxBackoff float64,
maxAttempts int,
f func() (data any, cancel bool, err error)) (any, bool, error) {
var (
res any
cancel bool
cause error
)
for i := 0; i < maxAttempts; i++ {
if i > 0 {
time.Sleep(math.RandBackoffSeconds(initBackoff, maxBackoff, 2.0, i))
}
res, cancel, cause = f()
if cause == nil || cancel {
break
}
select {
case <-ctx.Done():
return nil, cancel, ctx.Err()
default:
}
}
return res, cancel, cause
}