-
Notifications
You must be signed in to change notification settings - Fork 786
/
type.go
105 lines (91 loc) · 3.46 KB
/
type.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
// Copyright (c) 2018 Ashley Jeffs
//
// 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.
package retries
import (
"fmt"
"time"
"github.com/cenkalti/backoff"
)
//------------------------------------------------------------------------------
// Backoff contains configuration params for the exponential backoff of the
// retry mechanism.
type Backoff struct {
InitialInterval string `json:"initial_interval" yaml:"initial_interval"`
MaxInterval string `json:"max_interval" yaml:"max_interval"`
MaxElapsedTime string `json:"max_elapsed_time" yaml:"max_elapsed_time"`
}
// Config contains configuration params for a retries mechanism.
type Config struct {
MaxRetries uint64 `json:"max_retries" yaml:"max_retries"`
Backoff Backoff `json:"backoff" yaml:"backoff"`
}
// NewConfig creates a new Config with default values.
func NewConfig() Config {
return Config{
MaxRetries: 0,
Backoff: Backoff{
InitialInterval: "500ms",
MaxInterval: "3s",
MaxElapsedTime: "0s",
},
}
}
//------------------------------------------------------------------------------
// Get returns a valid *backoff.ExponentialBackoff based on the configuration
// values of Config.
func (c *Config) Get() (backoff.BackOff, error) {
ctor, err := c.GetCtor()
if err != nil {
return nil, err
}
return ctor(), nil
}
// GetCtor returns a constructor for a backoff.Backoff based on the
// configuration values of Config.
func (c *Config) GetCtor() (func() backoff.BackOff, error) {
var initInterval, maxInterval, maxElapsed time.Duration
var err error
if c.Backoff.InitialInterval != "" {
if initInterval, err = time.ParseDuration(c.Backoff.InitialInterval); err != nil {
return nil, fmt.Errorf("invalid backoff initial interval: %v", err)
}
}
if c.Backoff.MaxInterval != "" {
if maxInterval, err = time.ParseDuration(c.Backoff.MaxInterval); err != nil {
return nil, fmt.Errorf("invalid backoff max interval: %v", err)
}
}
if c.Backoff.MaxElapsedTime != "" {
if maxElapsed, err = time.ParseDuration(c.Backoff.MaxElapsedTime); err != nil {
return nil, fmt.Errorf("invalid backoff max elapsed interval: %v", err)
}
}
return func() backoff.BackOff {
boff := backoff.NewExponentialBackOff()
boff.InitialInterval = initInterval
boff.MaxInterval = maxInterval
boff.MaxElapsedTime = maxElapsed
if c.MaxRetries > 0 {
return backoff.WithMaxRetries(boff, c.MaxRetries)
}
return boff
}, nil
}
//------------------------------------------------------------------------------