/
retry.go
66 lines (56 loc) · 2.05 KB
/
retry.go
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// Copyright 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 fake
import (
"context"
"errors"
"time"
"github.com/gardener/gardener/pkg/utils/retry"
)
var _ retry.Ops = &Ops{}
// Ops implements retry.Ops and can be used to mock calls to retry.Until and retry.UntilTimeout in unit tests.
// This implementation ignores the `interval` parameter and doesn't wait between retries, which makes it useful for
// writing quick and stable unit tests.
type Ops struct {
// MaxAttempts configures the maximum amount of attempts before returning a retryError. If it is set to 0, it
// fails immediately and f is never called.
MaxAttempts int
}
// Until implements retry.Ops without waiting between retries.
func (o *Ops) Until(ctx context.Context, _ time.Duration, f retry.Func) error {
var (
minorErr error
attempts = 0
)
for {
attempts++
if attempts > o.MaxAttempts {
return retry.NewError(errors.New("max attempts reached"), minorErr)
}
done, err := f(ctx)
if err != nil {
if done {
return err
}
minorErr = err
} else if done {
return nil
}
}
}
// UntilTimeout implements retry.Ops without waiting between retries. UntilTimeout ignores the timeout
// parameter and instead uses Ops.MaxAttempts to configure, how often f is retried.
func (o *Ops) UntilTimeout(ctx context.Context, interval, _ time.Duration, f retry.Func) error {
return o.Until(ctx, interval, f)
}