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reader.go
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reader.go
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package bdodb
import (
"github.com/blevesearch/bleve/index/store"
"github.com/dgraph-io/badger/v2"
)
// Reader implements bleve store Reader interface
type Reader struct {
iteratorOptions badger.IteratorOptions
store *Store
txn *badger.Txn
}
// Get fetch the value of the specified key from the store
func (reader *Reader) Get(k []byte) ([]byte, error) {
item, err := reader.txn.Get(k)
if err != nil {
return nil, nil
}
return item.ValueCopy(nil)
}
// MultiGet returns multiple values for the specified keys
func (reader *Reader) MultiGet(keys [][]byte) ([][]byte, error) {
return store.MultiGet(reader, keys)
}
// PrefixIterator initialize a new prefix iterator
func (reader *Reader) PrefixIterator(k []byte) store.KVIterator {
itr := reader.txn.NewIterator(reader.iteratorOptions)
rv := Iterator{
iterator: itr,
prefix: k,
}
rv.iterator.Seek(k)
return &rv
}
// RangeIterator initialize a new range iterator
func (reader *Reader) RangeIterator(start, end []byte) store.KVIterator {
itr := reader.txn.NewIterator(reader.iteratorOptions)
rv := Iterator{
iterator: itr,
start: start,
stop: end,
}
rv.iterator.Seek(start)
return &rv
}
// Close closes the current reader and do some cleanup
func (reader *Reader) Close() error {
return reader.txn.Commit()
}