mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-01 03:18:29 +08:00
92 lines
2.3 KiB
Go
92 lines
2.3 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package retry
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import (
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"context"
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"time"
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"github.com/cockroachdb/errors"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/util/funcutil"
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"github.com/milvus-io/milvus/pkg/util/merr"
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)
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// Do will run function with retry mechanism.
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// fn is the func to run.
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// Option can control the retry times and timeout.
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func Do(ctx context.Context, fn func() error, opts ...Option) error {
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if !funcutil.CheckCtxValid(ctx) {
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return ctx.Err()
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}
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log := log.Ctx(ctx)
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c := newDefaultConfig()
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for _, opt := range opts {
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opt(c)
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}
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var el error
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for i := uint(0); i < c.attempts; i++ {
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if err := fn(); err != nil {
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if i%4 == 0 {
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log.Error("retry func failed", zap.Uint("retry time", i), zap.Error(err))
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}
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err = errors.Wrapf(err, "attempt #%d", i)
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el = merr.Combine(el, err)
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if !IsRecoverable(err) {
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return el
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}
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deadline, ok := ctx.Deadline()
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if ok && time.Until(deadline) < c.sleep {
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// to avoid sleep until ctx done
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return el
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}
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select {
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case <-time.After(c.sleep):
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case <-ctx.Done():
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return merr.Combine(el, ctx.Err())
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}
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c.sleep *= 2
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if c.sleep > c.maxSleepTime {
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c.sleep = c.maxSleepTime
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}
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} else {
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return nil
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}
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}
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return el
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}
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// errUnrecoverable is error instance for unrecoverable.
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var errUnrecoverable = errors.New("unrecoverable error")
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// Unrecoverable method wrap an error to unrecoverableError. This will make retry
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// quick return.
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func Unrecoverable(err error) error {
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return merr.Combine(err, errUnrecoverable)
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}
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// IsRecoverable is used to judge whether the error is wrapped by unrecoverableError.
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func IsRecoverable(err error) bool {
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return !errors.Is(err, errUnrecoverable)
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}
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