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// Copyright (c) 2012, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package leveldb
import (
"github.com/syndtr/goleveldb/leveldb/filter"
"github.com/syndtr/goleveldb/leveldb/opt"
)
func dupOptions(o *opt.Options) *opt.Options {
newo := &opt.Options{}
if o != nil {
*newo = *o
}
if newo.Strict == 0 {
newo.Strict = opt.DefaultStrict
}
return newo
}
func (s *session) setOptions(o *opt.Options) {
no := dupOptions(o)
// Alternative filters.
if filters := o.GetAltFilters(); len(filters) > 0 {
no.AltFilters = make([]filter.Filter, len(filters))
for i, filter := range filters {
no.AltFilters[i] = &iFilter{filter}
}
}
// Comparer.
s.icmp = &iComparer{o.GetComparer()}
no.Comparer = s.icmp
// Filter.
if filter := o.GetFilter(); filter != nil {
no.Filter = &iFilter{filter}
}
s.o = &cachedOptions{Options: no}
s.o.cache()
}
const optCachedLevel = 7
type cachedOptions struct {
*opt.Options
compactionExpandLimit []int
compactionGPOverlaps []int
compactionSourceLimit []int
compactionTableSize []int
compactionTotalSize []int64
}
func (co *cachedOptions) cache() {
co.compactionExpandLimit = make([]int, optCachedLevel)
co.compactionGPOverlaps = make([]int, optCachedLevel)
co.compactionSourceLimit = make([]int, optCachedLevel)
co.compactionTableSize = make([]int, optCachedLevel)
co.compactionTotalSize = make([]int64, optCachedLevel)
for level := 0; level < optCachedLevel; level++ {
co.compactionExpandLimit[level] = co.Options.GetCompactionExpandLimit(level)
co.compactionGPOverlaps[level] = co.Options.GetCompactionGPOverlaps(level)
co.compactionSourceLimit[level] = co.Options.GetCompactionSourceLimit(level)
co.compactionTableSize[level] = co.Options.GetCompactionTableSize(level)
co.compactionTotalSize[level] = co.Options.GetCompactionTotalSize(level)
}
}
func (co *cachedOptions) GetCompactionExpandLimit(level int) int {
if level < optCachedLevel {
return co.compactionExpandLimit[level]
}
return co.Options.GetCompactionExpandLimit(level)
}
func (co *cachedOptions) GetCompactionGPOverlaps(level int) int {
if level < optCachedLevel {
return co.compactionGPOverlaps[level]
}
return co.Options.GetCompactionGPOverlaps(level)
}
func (co *cachedOptions) GetCompactionSourceLimit(level int) int {
if level < optCachedLevel {
return co.compactionSourceLimit[level]
}
return co.Options.GetCompactionSourceLimit(level)
}
func (co *cachedOptions) GetCompactionTableSize(level int) int {
if level < optCachedLevel {
return co.compactionTableSize[level]
}
return co.Options.GetCompactionTableSize(level)
}
func (co *cachedOptions) GetCompactionTotalSize(level int) int64 {
if level < optCachedLevel {
return co.compactionTotalSize[level]
}
return co.Options.GetCompactionTotalSize(level)
}
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