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leveldb.go
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leveldb.go
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package dbbench
import (
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/filter"
"github.com/syndtr/goleveldb/leveldb/iterator"
"github.com/syndtr/goleveldb/leveldb/opt"
"github.com/syndtr/goleveldb/leveldb/util"
)
type (
LevelDBWrapper struct {
ro *opt.ReadOptions
wo *opt.WriteOptions
handle *leveldb.DB
}
)
func NewWrappedLevelDB() (*LevelDBWrapper, error) {
db, err := leveldb.OpenFile(*dbPath, &opt.Options{
Filter: filter.NewBloomFilter(10),
DisableSeeksCompaction: true,
OpenFilesCacheCapacity: *openFilesCacheCapacity,
BlockCacheCapacity: *cacheSize / 2 * opt.MiB,
WriteBuffer: *cacheSize / 4 * opt.MiB,
// if we've disabled writes, or we're doing a full scan, we should open the database in read only mode
ReadOnly: *readOnly || *fullScan,
})
if err != nil {
return nil, err
}
wo := &opt.WriteOptions{
NoWriteMerge: *noWriteMerge,
Sync: *syncWrites,
}
ro := &opt.ReadOptions{
DontFillCache: *dontFillCache,
}
if *readStrict {
ro.Strict = opt.StrictAll
} else {
ro.Strict = opt.DefaultStrict
}
if *nilReadOptions {
ro = nil
}
wrapper := new(LevelDBWrapper)
wrapper.handle = db
wrapper.wo = wo
wrapper.ro = ro
return wrapper, nil
}
func (l *LevelDBWrapper) Close() error {
return l.handle.Close()
}
func (l *LevelDBWrapper) Compact() error {
return l.handle.CompactRange(util.Range{Start: nil, Limit: nil})
}
func (l *LevelDBWrapper) NewIterator() iterator.Iterator {
return l.handle.NewIterator(nil, nil)
}
func (l *LevelDBWrapper) Get(key []byte) ([]byte, error) {
return l.handle.Get(key, l.ro)
}
func (l *LevelDBWrapper) Put(key []byte, value []byte) error {
return l.handle.Put(key, value, l.wo)
}