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withretryer.go
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/
withretryer.go
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// Copyright 2021 The s3iot 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 s3iot
import (
"context"
"errors"
"time"
)
func withRetry(ctx context.Context, id int64, retryer Retryer, errClassifier ErrorClassifier, fn func() error) error {
for {
err := fn()
if err != nil {
if fe, fatal := err.(*fatalError); fatal {
return fe.error
}
var re *retryableError
if !errClassifier.IsRetryable(err) && !errors.As(err, &re) {
return err
}
if wait, ok := errClassifier.IsThrottle(err); ok {
select {
case <-time.After(wait):
case <-ctx.Done():
return ctx.Err()
}
}
if ctx.Err() == nil && retryer.OnFail(ctx, id, err) {
continue
}
if ctx.Err() == err {
return err
}
return &RetryError{error: err}
}
retryer.OnSuccess(id)
return nil
}
}