Upgrade server dependencies, manage them with govendor

This commit is contained in:
Ken-Håvard Lieng 2017-04-18 03:02:51 +02:00
parent ebee2746d6
commit 971278e7e5
1748 changed files with 196165 additions and 194500 deletions

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vendor/github.com/jpillora/backoff/LICENSE generated vendored Normal file
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The MIT License (MIT)
Copyright (c) 2017 Jaime Pillora
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# Backoff
A simple backoff algorithm in Go (Golang)
A simple exponential backoff counter in Go (Golang)
[![GoDoc](https://godoc.org/github.com/jpillora/backoff?status.svg)](https://godoc.org/github.com/jpillora/backoff)
[![GoDoc](https://godoc.org/github.com/jpillora/backoff?status.svg)](https://godoc.org/github.com/jpillora/backoff) [![Circle CI](https://circleci.com/gh/jpillora/backoff.svg?style=shield)](https://circleci.com/gh/jpillora/backoff)
### Install
@ -110,29 +110,10 @@ Reset!
214.957989ms
```
#### Documentation
https://godoc.org/github.com/jpillora/backoff
#### Credits
Ported from some JavaScript written by [@tj](https://github.com/tj)
#### MIT License
Copyright © 2015 Jaime Pillora <dev@jpillora.com>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Forked from some JavaScript written by [@tj](https://github.com/tj)

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// Package backoff provides an exponential-backoff implementation.
package backoff
import (
@ -6,49 +7,82 @@ import (
"time"
)
//Backoff is a time.Duration counter. It starts at Min.
//After every call to Duration() it is multiplied by Factor.
//It is capped at Max. It returns to Min on every call to Reset().
//Used in conjunction with the time package.
// Backoff is a time.Duration counter, starting at Min. After every call to
// the Duration method the current timing is multiplied by Factor, but it
// never exceeds Max.
//
// Backoff is not generally concurrent-safe, but the ForAttempt method can
// be used concurrently.
type Backoff struct {
//Factor is the multiplying factor for each increment step
attempts, Factor float64
attempt, Factor float64
//Jitter eases contention by randomizing backoff steps
Jitter bool
//Min and Max are the minimum and maximum values of the counter
Min, Max time.Duration
}
//Returns the current value of the counter and then
//multiplies it Factor
// Duration returns the duration for the current attempt before incrementing
// the attempt counter. See ForAttempt.
func (b *Backoff) Duration() time.Duration {
//Zero-values are nonsensical, so we use
//them to apply defaults
if b.Min == 0 {
b.Min = 100 * time.Millisecond
}
if b.Max == 0 {
b.Max = 10 * time.Second
}
if b.Factor == 0 {
b.Factor = 2
}
//calculate this duration
dur := float64(b.Min) * math.Pow(b.Factor, b.attempts)
if b.Jitter == true {
dur = rand.Float64()*(dur-float64(b.Min)) + float64(b.Min)
}
//cap!
if dur > float64(b.Max) {
return b.Max
}
//bump attempts count
b.attempts++
//return as a time.Duration
return time.Duration(dur)
d := b.ForAttempt(b.attempt)
b.attempt++
return d
}
//Resets the current value of the counter back to Min
func (b *Backoff) Reset() {
b.attempts = 0
const maxInt64 = float64(math.MaxInt64 - 512)
// ForAttempt returns the duration for a specific attempt. This is useful if
// you have a large number of independent Backoffs, but don't want use
// unnecessary memory storing the Backoff parameters per Backoff. The first
// attempt should be 0.
//
// ForAttempt is concurrent-safe.
func (b *Backoff) ForAttempt(attempt float64) time.Duration {
// Zero-values are nonsensical, so we use
// them to apply defaults
min := b.Min
if min <= 0 {
min = 100 * time.Millisecond
}
max := b.Max
if max <= 0 {
max = 10 * time.Second
}
if min >= max {
// short-circuit
return max
}
factor := b.Factor
if factor <= 0 {
factor = 2
}
//calculate this duration
minf := float64(min)
durf := minf * math.Pow(factor, attempt)
if b.Jitter {
durf = rand.Float64()*(durf-minf) + minf
}
//ensure float64 wont overflow int64
if durf > maxInt64 {
return max
}
dur := time.Duration(durf)
//keep within bounds
if dur < min {
return min
} else if dur > max {
return max
}
return dur
}
// Reset restarts the current attempt counter at zero.
func (b *Backoff) Reset() {
b.attempt = 0
}
// Attempt returns the current attempt counter value.
func (b *Backoff) Attempt() float64 {
return b.attempt
}

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package backoff
import (
"testing"
"time"
)
func Test1(t *testing.T) {
b := &Backoff{
Min: 100 * time.Millisecond,
Max: 10 * time.Second,
Factor: 2,
}
equals(t, b.Duration(), 100*time.Millisecond)
equals(t, b.Duration(), 200*time.Millisecond)
equals(t, b.Duration(), 400*time.Millisecond)
b.Reset()
equals(t, b.Duration(), 100*time.Millisecond)
}
func Test2(t *testing.T) {
b := &Backoff{
Min: 100 * time.Millisecond,
Max: 10 * time.Second,
Factor: 1.5,
}
equals(t, b.Duration(), 100*time.Millisecond)
equals(t, b.Duration(), 150*time.Millisecond)
equals(t, b.Duration(), 225*time.Millisecond)
b.Reset()
equals(t, b.Duration(), 100*time.Millisecond)
}
func Test3(t *testing.T) {
b := &Backoff{
Min: 100 * time.Nanosecond,
Max: 10 * time.Second,
Factor: 1.75,
}
equals(t, b.Duration(), 100*time.Nanosecond)
equals(t, b.Duration(), 175*time.Nanosecond)
equals(t, b.Duration(), 306*time.Nanosecond)
b.Reset()
equals(t, b.Duration(), 100*time.Nanosecond)
}
func TestJitter(t *testing.T) {
b := &Backoff{
Min: 100 * time.Millisecond,
Max: 10 * time.Second,
Factor: 2,
Jitter: true,
}
equals(t, b.Duration(), 100*time.Millisecond)
between(t, b.Duration(), 100*time.Millisecond, 200*time.Millisecond)
between(t, b.Duration(), 100*time.Millisecond, 400*time.Millisecond)
b.Reset()
equals(t, b.Duration(), 100*time.Millisecond)
}
func between(t *testing.T, actual, low, high time.Duration) {
if actual < low {
t.Fatalf("Got %s, Expecting >= %s", actual, low)
}
if actual > high {
t.Fatalf("Got %s, Expecting <= %s", actual, high)
}
}
func equals(t *testing.T, d1, d2 time.Duration) {
if d1 != d2 {
t.Fatalf("Got %s, Expecting %s", d1, d2)
}
}