/
store_leveldb.go
85 lines (72 loc) · 1.78 KB
/
store_leveldb.go
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package bttest
import (
"github.com/syndtr/goleveldb/leveldb"
"github.com/syndtr/goleveldb/leveldb/util"
btpb "google.golang.org/genproto/googleapis/bigtable/v2"
)
type leveldbRows struct {
db *leveldb.DB
newFunc func(nuke bool) *leveldb.DB
}
var _ Rows = &leveldbRows{}
func (rows *leveldbRows) Ascend(iterator RowIterator) {
rows.ascendRange(nil, iterator)
}
func (rows *leveldbRows) AscendRange(greaterOrEqual, lessThan keyType, iterator RowIterator) {
rows.ascendRange(&util.Range{
Start: greaterOrEqual,
Limit: lessThan,
}, iterator)
}
func (rows *leveldbRows) AscendLessThan(lessThan keyType, iterator RowIterator) {
rows.ascendRange(&util.Range{
Limit: lessThan,
}, iterator)
}
func (rows *leveldbRows) AscendGreaterOrEqual(greaterOrEqual keyType, iterator RowIterator) {
rows.ascendRange(&util.Range{
Start: greaterOrEqual,
}, iterator)
}
func (rows *leveldbRows) Delete(key keyType) {
err := rows.db.Delete(key, nil)
if err != nil {
panic(err)
}
}
func (rows *leveldbRows) Get(key keyType) *btpb.Row {
item, err := rows.db.Get(key, nil)
if err == leveldb.ErrNotFound {
return nil
} else if err != nil {
panic(err)
}
return fromProto(item)
}
func (rows *leveldbRows) ReplaceOrInsert(r *btpb.Row) {
err := rows.db.Put(r.Key, toProto(r), nil)
if err != nil {
panic(err)
}
}
func (rows *leveldbRows) Clear() {
if err := rows.db.Close(); err != nil {
panic(err)
}
rows.db = rows.newFunc(true)
}
func (rows *leveldbRows) Close() {
if err := rows.db.Close(); err != nil {
panic(err)
}
}
func (rows *leveldbRows) ascendRange(rng *util.Range, iterator RowIterator) {
it := rows.db.NewIterator(rng, nil)
defer it.Release()
for ok := it.First(); ok; ok = it.Next() {
iterator(fromProto(it.Value()))
}
if err := it.Error(); err != nil {
panic(err)
}
}