github.com/blend/go-sdk@v1.20220411.3/retry/delay_provider.go (about)

     1  /*
     2  
     3  Copyright (c) 2022 - Present. Blend Labs, Inc. All rights reserved
     4  Use of this source code is governed by a MIT license that can be found in the LICENSE file.
     5  
     6  */
     7  
     8  package retry
     9  
    10  import (
    11  	"context"
    12  	"time"
    13  )
    14  
    15  // DelayProvider is a provider for retry delays.
    16  type DelayProvider func(context.Context, uint) time.Duration
    17  
    18  // ConstantDelay returns a constant delay provider.
    19  func ConstantDelay(d time.Duration) DelayProvider {
    20  	return func(_ context.Context, _ uint) time.Duration {
    21  		return d
    22  	}
    23  }
    24  
    25  // ExponentialBackoff is a backoff provider that doubles the base delay each attempt.
    26  func ExponentialBackoff(d time.Duration) DelayProvider {
    27  	return func(_ context.Context, attempt uint) time.Duration {
    28  		return d * (1 << attempt)
    29  	}
    30  }