mirror of
https://gitee.com/rainbond/Rainbond.git
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70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
// Copyright (C) 2014-2021 Goodrain Co., Ltd.
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// RAINBOND, Application Management Platform
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version. For any non-GPL usage of Rainbond,
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// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
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// must be obtained first.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package retryutil
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import (
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"fmt"
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"time"
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)
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//RetryError -
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type RetryError struct {
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n int
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}
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func (e *RetryError) Error() string {
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return fmt.Sprintf("still failing after %d retries", e.n)
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}
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//IsRetryFailure -
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func IsRetryFailure(err error) bool {
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_, ok := err.(*RetryError)
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return ok
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}
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//ConditionFunc -
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type ConditionFunc func() (bool, error)
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// Retry retries f every interval until after maxRetries.
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// The interval won't be affected by how long f takes.
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// For example, if interval is 3s, f takes 1s, another f will be called 2s later.
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// However, if f takes longer than interval, it will be delayed.
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func Retry(interval time.Duration, maxRetries int, f ConditionFunc) error {
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if maxRetries <= 0 {
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return fmt.Errorf("maxRetries (%d) should be > 0", maxRetries)
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}
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tick := time.NewTicker(interval)
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defer tick.Stop()
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for i := 0; ; i++ {
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ok, err := f()
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if err != nil {
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return err
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}
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if ok {
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return nil
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}
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if i == maxRetries {
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break
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}
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<-tick.C
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}
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return &RetryError{maxRetries}
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}
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