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https://github.com/letic/terraform-provider-google.git
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961c878e0d
Switch to using Go modules. This migrates our vendor.json to use Go 1.11's modules system, and replaces the vendor folder with the output of go mod vendor. The vendored code should remain basically the same; I believe some tree shaking of packages and support scripts/licenses/READMEs/etc. happened. This also fixes Travis and our Makefile to no longer use govendor.
52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gensupport
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import (
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"math/rand"
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"time"
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)
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// BackoffStrategy defines the set of functions that a backoff-er must
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// implement.
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type BackoffStrategy interface {
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// Pause returns the duration of the next pause and true if the operation should be
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// retried, or false if no further retries should be attempted.
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Pause() (time.Duration, bool)
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// Reset restores the strategy to its initial state.
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Reset()
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}
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// ExponentialBackoff performs exponential backoff as per https://en.wikipedia.org/wiki/Exponential_backoff.
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// The initial pause time is given by Base.
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// Once the total pause time exceeds Max, Pause will indicate no further retries.
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type ExponentialBackoff struct {
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Base time.Duration
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Max time.Duration
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total time.Duration
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n uint
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}
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// Pause returns the amount of time the caller should wait.
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func (eb *ExponentialBackoff) Pause() (time.Duration, bool) {
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if eb.total > eb.Max {
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return 0, false
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}
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// The next pause is selected from randomly from [0, 2^n * Base).
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d := time.Duration(rand.Int63n((1 << eb.n) * int64(eb.Base)))
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eb.total += d
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eb.n++
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return d, true
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}
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// Reset resets the backoff strategy such that the next Pause call will begin
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// counting from the start. It is not safe to call concurrently with Pause.
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func (eb *ExponentialBackoff) Reset() {
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eb.n = 0
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eb.total = 0
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}
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