github.com/m3db/m3@v1.5.0/src/x/retry/options.go (about)

     1  // Copyright (c) 2016 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package retry
    22  
    23  import (
    24  	"math"
    25  	"math/rand"
    26  	"time"
    27  
    28  	"github.com/uber-go/tally"
    29  )
    30  
    31  const (
    32  	defaultInitialBackoff = time.Second
    33  	defaultBackoffFactor  = 2.0
    34  	defaultMaxBackoff     = time.Duration(math.MaxInt64)
    35  	defaultMaxRetries     = 2
    36  	defaultForever        = false
    37  	defaultJitter         = true
    38  )
    39  
    40  type options struct {
    41  	scope          tally.Scope
    42  	initialBackoff time.Duration
    43  	backoffFactor  float64
    44  	maxBackoff     time.Duration
    45  	maxRetries     int
    46  	forever        bool
    47  	jitter         bool
    48  	rngFn          RngFn
    49  }
    50  
    51  // NewOptions creates new retry options.
    52  func NewOptions() Options {
    53  	return &options{
    54  		scope:          tally.NoopScope,
    55  		initialBackoff: defaultInitialBackoff,
    56  		backoffFactor:  defaultBackoffFactor,
    57  		maxBackoff:     defaultMaxBackoff,
    58  		maxRetries:     defaultMaxRetries,
    59  		forever:        defaultForever,
    60  		jitter:         defaultJitter,
    61  		rngFn:          rand.Int63n,
    62  	}
    63  }
    64  
    65  func (o *options) SetMetricsScope(value tally.Scope) Options {
    66  	opts := *o
    67  	opts.scope = value
    68  	return &opts
    69  }
    70  
    71  func (o *options) MetricsScope() tally.Scope {
    72  	return o.scope
    73  }
    74  
    75  func (o *options) SetInitialBackoff(value time.Duration) Options {
    76  	opts := *o
    77  	opts.initialBackoff = value
    78  	return &opts
    79  }
    80  
    81  func (o *options) InitialBackoff() time.Duration {
    82  	return o.initialBackoff
    83  }
    84  
    85  func (o *options) SetBackoffFactor(value float64) Options {
    86  	opts := *o
    87  	opts.backoffFactor = value
    88  	return &opts
    89  }
    90  
    91  func (o *options) BackoffFactor() float64 {
    92  	return o.backoffFactor
    93  }
    94  
    95  func (o *options) SetMaxBackoff(value time.Duration) Options {
    96  	opts := *o
    97  	opts.maxBackoff = value
    98  	return &opts
    99  }
   100  
   101  func (o *options) MaxBackoff() time.Duration {
   102  	return o.maxBackoff
   103  }
   104  
   105  func (o *options) SetMaxRetries(value int) Options {
   106  	opts := *o
   107  	opts.maxRetries = value
   108  	return &opts
   109  }
   110  
   111  func (o *options) MaxRetries() int {
   112  	return o.maxRetries
   113  }
   114  
   115  func (o *options) SetForever(value bool) Options {
   116  	opts := *o
   117  	opts.forever = value
   118  	return &opts
   119  }
   120  
   121  func (o *options) Forever() bool {
   122  	return o.forever
   123  }
   124  
   125  func (o *options) SetJitter(value bool) Options {
   126  	opts := *o
   127  	opts.jitter = value
   128  	return &opts
   129  }
   130  
   131  func (o *options) Jitter() bool {
   132  	return o.jitter
   133  }
   134  
   135  func (o *options) SetRngFn(value RngFn) Options {
   136  	opts := *o
   137  	opts.rngFn = value
   138  	return &opts
   139  }
   140  
   141  func (o *options) RngFn() RngFn {
   142  	return o.rngFn
   143  }