github.com/m3db/m3@v1.5.0/src/dbnode/persist/fs/msgpack/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 msgpack
    22  
    23  import "github.com/m3db/m3/src/dbnode/persist/schema"
    24  
    25  // DecodingOptions provides a set of options for decoding data.
    26  type DecodingOptions interface {
    27  	// SetAllocDecodedBytes sets whether we allocate new space when decoding
    28  	// a byte slice.
    29  	SetAllocDecodedBytes(value bool) DecodingOptions
    30  
    31  	// AllocDecodedBytes determines whether we allocate new space when decoding
    32  	// a byte slice.
    33  	AllocDecodedBytes() bool
    34  
    35  	// SetIndexEntryHasher sets the indexEntryHasher method for this decoder.
    36  	SetIndexEntryHasher(value schema.IndexEntryHasher) DecodingOptions
    37  
    38  	// IndexEntryHasher returns the IndexEntryHasher for this decoder.
    39  	IndexEntryHasher() schema.IndexEntryHasher
    40  }
    41  
    42  const (
    43  	defaultAllocDecodedBytes = false
    44  )
    45  
    46  type decodingOptions struct {
    47  	allocDecodedBytes bool
    48  	indexEntryHasher  schema.IndexEntryHasher
    49  }
    50  
    51  // NewDecodingOptions creates a new set of decoding options.
    52  func NewDecodingOptions() DecodingOptions {
    53  	return &decodingOptions{
    54  		allocDecodedBytes: defaultAllocDecodedBytes,
    55  		indexEntryHasher:  schema.NewXXHasher(),
    56  	}
    57  }
    58  
    59  func (o *decodingOptions) SetAllocDecodedBytes(value bool) DecodingOptions {
    60  	opts := *o
    61  	opts.allocDecodedBytes = value
    62  	return &opts
    63  }
    64  
    65  func (o *decodingOptions) AllocDecodedBytes() bool {
    66  	return o.allocDecodedBytes
    67  }
    68  
    69  func (o *decodingOptions) SetIndexEntryHasher(value schema.IndexEntryHasher) DecodingOptions {
    70  	opts := *o
    71  	opts.indexEntryHasher = value
    72  	return &opts
    73  }
    74  
    75  func (o *decodingOptions) IndexEntryHasher() schema.IndexEntryHasher {
    76  	return o.indexEntryHasher
    77  }