/
retry.go
47 lines (41 loc) · 1.28 KB
/
retry.go
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// Copyright 2019 Aporeto Inc.
// 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 retry
import (
"context"
"time"
)
// Retry retries the given jobFunc until the context cancels.
// If a retry is needed and retryFunc is not nil, it will be called.
// retryFunc will get the error that caused the retry. If retryFunc
// retries an error, then the retry procedure stops, and the error is
// returned.
func Retry(
ctx context.Context,
jobFunc func() (interface{}, error),
retryFunc func(error) error,
) (out interface{}, err error) {
for {
if out, err = jobFunc(); err == nil {
return out, nil
}
if retryFunc != nil {
if rerr := retryFunc(err); rerr != nil {
return nil, rerr
}
}
select {
case <-time.After(3 * time.Second):
case <-ctx.Done():
return nil, err
}
}
}