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

     1  // Copyright (c) 2018 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 sync
    22  
    23  import (
    24  	"runtime"
    25  	"time"
    26  
    27  	"github.com/m3db/m3/src/x/instrument"
    28  )
    29  
    30  const (
    31  	defaultKillWorkerProbability = 0.001
    32  	defaultGrowOnDemand          = false
    33  )
    34  
    35  var (
    36  	defaultNumShards = int64(runtime.GOMAXPROCS(0))
    37  	defaultNowFn     = time.Now
    38  )
    39  
    40  // NowFn is a function that returns the current time.
    41  type NowFn func() time.Time
    42  
    43  // NewPooledWorkerPoolOptions returns a new PooledWorkerPoolOptions with default options
    44  func NewPooledWorkerPoolOptions() PooledWorkerPoolOptions {
    45  	return &pooledWorkerPoolOptions{
    46  		growOnDemand:          defaultGrowOnDemand,
    47  		numShards:             defaultNumShards,
    48  		killWorkerProbability: defaultKillWorkerProbability,
    49  		nowFn:                 defaultNowFn,
    50  		iOpts:                 instrument.NewOptions(),
    51  	}
    52  }
    53  
    54  type pooledWorkerPoolOptions struct {
    55  	growOnDemand          bool
    56  	numShards             int64
    57  	killWorkerProbability float64
    58  	nowFn                 NowFn
    59  	iOpts                 instrument.Options
    60  }
    61  
    62  func (o *pooledWorkerPoolOptions) SetGrowOnDemand(value bool) PooledWorkerPoolOptions {
    63  	opts := *o
    64  	opts.growOnDemand = value
    65  	return &opts
    66  }
    67  
    68  func (o *pooledWorkerPoolOptions) GrowOnDemand() bool {
    69  	return o.growOnDemand
    70  }
    71  
    72  func (o *pooledWorkerPoolOptions) SetNumShards(value int64) PooledWorkerPoolOptions {
    73  	opts := *o
    74  	opts.numShards = value
    75  	return &opts
    76  }
    77  
    78  func (o *pooledWorkerPoolOptions) NumShards() int64 {
    79  	return o.numShards
    80  }
    81  
    82  func (o *pooledWorkerPoolOptions) SetKillWorkerProbability(value float64) PooledWorkerPoolOptions {
    83  	opts := *o
    84  	opts.killWorkerProbability = value
    85  	return &opts
    86  }
    87  
    88  func (o *pooledWorkerPoolOptions) KillWorkerProbability() float64 {
    89  	return o.killWorkerProbability
    90  }
    91  
    92  func (o *pooledWorkerPoolOptions) SetNowFn(value NowFn) PooledWorkerPoolOptions {
    93  	opts := *o
    94  	opts.nowFn = value
    95  	return &opts
    96  }
    97  
    98  func (o *pooledWorkerPoolOptions) NowFn() NowFn {
    99  	return o.nowFn
   100  }
   101  
   102  func (o *pooledWorkerPoolOptions) SetInstrumentOptions(value instrument.Options) PooledWorkerPoolOptions {
   103  	opts := *o
   104  	opts.iOpts = value
   105  	return &opts
   106  }
   107  
   108  func (o *pooledWorkerPoolOptions) InstrumentOptions() instrument.Options {
   109  	return o.iOpts
   110  }