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backoff.go
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backoff.go
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package outputs
import (
"errors"
"time"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/libbeat/publisher"
"github.com/elastic/beats/libbeat/testing"
)
type backoffClient struct {
client NetworkClient
done chan struct{}
backoff *common.Backoff
}
// WithBackoff wraps a NetworkClient, adding exponential backoff support to a network client if connection/publishing failed.
func WithBackoff(client NetworkClient, init, max time.Duration) NetworkClient {
done := make(chan struct{})
backoff := common.NewBackoff(done, init, max)
return &backoffClient{
client: client,
done: done,
backoff: backoff,
}
}
func (b *backoffClient) Connect() error {
err := b.client.Connect()
b.backoff.WaitOnError(err)
return err
}
func (b *backoffClient) Close() error {
err := b.client.Close()
close(b.done)
return err
}
func (b *backoffClient) Publish(batch publisher.Batch) error {
err := b.client.Publish(batch)
if err != nil {
b.client.Close()
}
b.backoff.WaitOnError(err)
return err
}
func (b *backoffClient) Client() NetworkClient {
return b.client
}
func (b *backoffClient) Test(d testing.Driver) {
c, ok := b.client.(testing.Testable)
if !ok {
d.Fatal("output", errors.New("client doesn't support testing"))
}
c.Test(d)
}