github.com/m3db/m3@v1.5.0/src/x/pool/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 pool
    22  
    23  import "github.com/m3db/m3/src/x/instrument"
    24  
    25  const (
    26  	_defaultSize                = 4096
    27  	_defaultRefillLowWatermark  = 0.0
    28  	_defaultRefillHighWatermark = 0.0
    29  
    30  	// DynamicPoolSize is a magic size value that will force use of sync.Pool-backed pool implementation.
    31  	DynamicPoolSize = -1
    32  )
    33  
    34  type objectPoolOptions struct {
    35  	size                int
    36  	refillLowWatermark  float64
    37  	refillHighWatermark float64
    38  	instrumentOpts      instrument.Options
    39  	onPoolAccessErrorFn OnPoolAccessErrorFn
    40  	dynamic             bool
    41  }
    42  
    43  // NewObjectPoolOptions creates a new set of object pool options
    44  func NewObjectPoolOptions() ObjectPoolOptions {
    45  	return &objectPoolOptions{
    46  		size:                _defaultSize,
    47  		dynamic:             false,
    48  		refillLowWatermark:  _defaultRefillLowWatermark,
    49  		refillHighWatermark: _defaultRefillHighWatermark,
    50  		instrumentOpts:      instrument.NewOptions(),
    51  		onPoolAccessErrorFn: func(err error) { panic(err) },
    52  	}
    53  }
    54  
    55  func (o *objectPoolOptions) SetSize(value int) ObjectPoolOptions {
    56  	opts := *o
    57  	opts.size = value
    58  	return &opts
    59  }
    60  
    61  func (o *objectPoolOptions) Size() int {
    62  	if o.dynamic {
    63  		return DynamicPoolSize
    64  	}
    65  	return o.size
    66  }
    67  
    68  func (o *objectPoolOptions) SetDynamic(dynamic bool) ObjectPoolOptions {
    69  	opts := *o
    70  	opts.dynamic = dynamic
    71  	return &opts
    72  }
    73  
    74  func (o *objectPoolOptions) Dynamic() bool {
    75  	// support enabling dynamic pools, even if a user does not expose pool options directly.
    76  	if o.size == DynamicPoolSize {
    77  		return true
    78  	}
    79  	return o.dynamic
    80  }
    81  
    82  func (o *objectPoolOptions) SetRefillLowWatermark(value float64) ObjectPoolOptions {
    83  	opts := *o
    84  	opts.refillLowWatermark = value
    85  	return &opts
    86  }
    87  
    88  func (o *objectPoolOptions) RefillLowWatermark() float64 {
    89  	return o.refillLowWatermark
    90  }
    91  
    92  func (o *objectPoolOptions) SetRefillHighWatermark(value float64) ObjectPoolOptions {
    93  	opts := *o
    94  	opts.refillHighWatermark = value
    95  	return &opts
    96  }
    97  
    98  func (o *objectPoolOptions) RefillHighWatermark() float64 {
    99  	return o.refillHighWatermark
   100  }
   101  
   102  func (o *objectPoolOptions) SetInstrumentOptions(value instrument.Options) ObjectPoolOptions {
   103  	opts := *o
   104  	opts.instrumentOpts = value
   105  	return &opts
   106  }
   107  
   108  func (o *objectPoolOptions) InstrumentOptions() instrument.Options {
   109  	return o.instrumentOpts
   110  }
   111  
   112  func (o *objectPoolOptions) SetOnPoolAccessErrorFn(value OnPoolAccessErrorFn) ObjectPoolOptions {
   113  	opts := *o
   114  	opts.onPoolAccessErrorFn = value
   115  	return &opts
   116  }
   117  
   118  func (o *objectPoolOptions) OnPoolAccessErrorFn() OnPoolAccessErrorFn {
   119  	return o.onPoolAccessErrorFn
   120  }