/
retrier.go
97 lines (84 loc) · 2.9 KB
/
retrier.go
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// Copyright The OpenTelemetry 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 utils // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/utils"
import (
"context"
"fmt"
"time"
"github.com/cenkalti/backoff/v4"
"go.opentelemetry.io/collector/consumer/consumererror"
"go.opentelemetry.io/collector/exporter/exporterhelper"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/scrub"
)
type Retrier struct {
cfg exporterhelper.RetrySettings
logger *zap.Logger
scrubber scrub.Scrubber
}
func NewRetrier(logger *zap.Logger, settings exporterhelper.RetrySettings, scrubber scrub.Scrubber) *Retrier {
return &Retrier{
cfg: settings,
logger: logger,
scrubber: scrubber,
}
}
// DoWithRetries does a function with retries. This is a condensed version of the code on
// the exporterhelper, which we reuse here since we want custom retry logic.
func (r *Retrier) DoWithRetries(ctx context.Context, fn func(context.Context) error) error {
if !r.cfg.Enabled {
return fn(ctx)
}
// Do not use NewExponentialBackOff since it calls Reset and the code here must
// call Reset after changing the InitialInterval (this saves an unnecessary call to Now).
expBackoff := backoff.ExponentialBackOff{
InitialInterval: r.cfg.InitialInterval,
RandomizationFactor: backoff.DefaultRandomizationFactor,
Multiplier: backoff.DefaultMultiplier,
MaxInterval: r.cfg.MaxInterval,
MaxElapsedTime: r.cfg.MaxElapsedTime,
Stop: backoff.Stop,
Clock: backoff.SystemClock,
}
expBackoff.Reset()
retryNum := int64(0)
for {
err := fn(ctx)
if err == nil {
return nil
}
err = r.scrubber.Scrub(err)
if consumererror.IsPermanent(err) {
return err
}
backoffDelay := expBackoff.NextBackOff()
if backoffDelay == backoff.Stop {
err = fmt.Errorf("max elapsed time expired %w", err)
return err
}
backoffDelayStr := backoffDelay.String()
r.logger.Info(
"Request failed. Will retry the request after interval.",
zap.Error(err),
zap.String("interval", backoffDelayStr),
)
retryNum++
// back-off, but get interrupted when shutting down or request is cancelled or timed out.
select {
case <-ctx.Done():
return fmt.Errorf("request is cancelled or timed out %w", err)
case <-time.After(backoffDelay):
}
}
}