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zeekayandHanzo Dev
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Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
72 lines
1.6 KiB
Go
72 lines
1.6 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package queue
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import (
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"context"
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"time"
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)
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var (
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backoffBegin = 50 * time.Millisecond
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backoffUpper = 2 * time.Second
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)
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type (
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backoffFuncRetErr[T any] func() (retry bool, ret T, err error)
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backoffFuncErr func() (retry bool, err error)
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)
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func mockBackoffDuration(d time.Duration) func() {
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oldBegin, oldUpper := backoffBegin, backoffUpper
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backoffBegin, backoffUpper = d, d
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return func() {
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backoffBegin, backoffUpper = oldBegin, oldUpper
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}
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}
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func backoffRetErr[T any](ctx context.Context, begin, upper time.Duration, end <-chan time.Time, fn backoffFuncRetErr[T]) (ret T, err error) {
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d := begin
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for {
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// check whether the context has been cancelled or has reached the deadline, return early
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select {
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case <-ctx.Done():
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return ret, ctx.Err()
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case <-end:
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return ret, context.DeadlineExceeded
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default:
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}
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// call the target function
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retry, ret, err := fn()
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if err != nil {
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return ret, err
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}
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if !retry {
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return ret, nil
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}
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// wait for a while before retrying, and also respect the context & deadline
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select {
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case <-ctx.Done():
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return ret, ctx.Err()
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case <-time.After(d):
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d *= 2
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if d > upper {
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d = upper
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}
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case <-end:
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return ret, context.DeadlineExceeded
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}
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}
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}
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func backoffErr(ctx context.Context, begin, upper time.Duration, end <-chan time.Time, fn backoffFuncErr) error {
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_, err := backoffRetErr(ctx, begin, upper, end, func() (retry bool, ret any, err error) {
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retry, err = fn()
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return retry, nil, err
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})
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return err
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}
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