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options.go
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options.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 mem
import (
"github.com/m3db/m3/src/m3ninx/postings"
"github.com/m3db/m3/src/m3ninx/postings/roaring"
"github.com/m3db/m3/src/m3ninx/util"
"github.com/m3db/m3/src/m3ninx/x/bytes"
"github.com/m3db/m3x/instrument"
"github.com/m3db/m3x/pool"
)
const (
defaultInitialCapacity = 1024
defaultBytesArrayPoolCapacity = 1024
// This pool is used in a single-threaded manner.
defaultBytesArrayPoolSize = 1
// 2<<23 * 16 bytes (byte slice pointer) * 2 (Golang G.C) ~=
// 0.5 GiB max memory usage.
defaultBytesArrayPoolMaxArrayCapacity = 2 << 23
)
// Options is a collection of knobs for an in-memory segment.
type Options interface {
// SetInstrumentOptions sets the instrument options.
SetInstrumentOptions(value instrument.Options) Options
// InstrumentOptions returns the instrument options.
InstrumentOptions() instrument.Options
// SetBytesSliceArrayPool sets the bytes slice array pool.
SetBytesSliceArrayPool(value bytes.SliceArrayPool) Options
// BytesSliceArrayPool returns the bytes slice array pool.
BytesSliceArrayPool() bytes.SliceArrayPool
// SetPostingsListPool sets the postings list pool.
SetPostingsListPool(value postings.Pool) Options
// PostingsListPool returns the postings list pool.
PostingsListPool() postings.Pool
// SetInitialCapacity sets the initial capacity.
SetInitialCapacity(value int) Options
// InitialCapacity returns the initial capacity.
InitialCapacity() int
// SetNewUUIDFn sets the function used to generate new UUIDs.
SetNewUUIDFn(value util.NewUUIDFn) Options
// NewUUIDFn returns the function used to generate new UUIDs.
NewUUIDFn() util.NewUUIDFn
}
type opts struct {
iopts instrument.Options
bytesSliceArrPool bytes.SliceArrayPool
postingsPool postings.Pool
initialCapacity int
newUUIDFn util.NewUUIDFn
}
// NewOptions returns new options.
func NewOptions() Options {
arrPool := bytes.NewSliceArrayPool(bytes.SliceArrayPoolOpts{
Capacity: defaultBytesArrayPoolCapacity,
MaxCapacity: defaultBytesArrayPoolMaxArrayCapacity,
Options: pool.NewObjectPoolOptions().
SetSize(defaultBytesArrayPoolSize).
SetRefillLowWatermark(0).
SetRefillHighWatermark(0),
})
arrPool.Init()
return &opts{
iopts: instrument.NewOptions(),
bytesSliceArrPool: arrPool,
postingsPool: postings.NewPool(nil, roaring.NewPostingsList),
initialCapacity: defaultInitialCapacity,
newUUIDFn: util.NewUUID,
}
}
func (o *opts) SetInstrumentOptions(v instrument.Options) Options {
opts := *o
opts.iopts = v
return &opts
}
func (o *opts) InstrumentOptions() instrument.Options {
return o.iopts
}
func (o *opts) SetBytesSliceArrayPool(value bytes.SliceArrayPool) Options {
opts := *o
opts.bytesSliceArrPool = value
return &opts
}
func (o *opts) BytesSliceArrayPool() bytes.SliceArrayPool {
return o.bytesSliceArrPool
}
func (o *opts) SetPostingsListPool(v postings.Pool) Options {
opts := *o
opts.postingsPool = v
return &opts
}
func (o *opts) PostingsListPool() postings.Pool {
return o.postingsPool
}
func (o *opts) SetInitialCapacity(v int) Options {
opts := *o
opts.initialCapacity = v
return &opts
}
func (o *opts) InitialCapacity() int {
return o.initialCapacity
}
func (o *opts) SetNewUUIDFn(v util.NewUUIDFn) Options {
opts := *o
opts.newUUIDFn = v
return &opts
}
func (o *opts) NewUUIDFn() util.NewUUIDFn {
return o.newUUIDFn
}