add other session providers (#5963)

vendor/github.com/lunny/nodb/store/tx.go

@@ -0,0 +1,42 @@
+package store
+
+import (
+	"github.com/lunny/nodb/store/driver"
+)
+
+type Tx struct {
+	driver.Tx
+}
+
+func (tx *Tx) NewIterator() *Iterator {
+	it := new(Iterator)
+	it.it = tx.Tx.NewIterator()
+
+	return it
+}
+
+func (tx *Tx) NewWriteBatch() WriteBatch {
+	return tx.Tx.NewWriteBatch()
+}
+
+func (tx *Tx) RangeIterator(min []byte, max []byte, rangeType uint8) *RangeLimitIterator {
+	return NewRangeLimitIterator(tx.NewIterator(), &Range{min, max, rangeType}, &Limit{0, -1})
+}
+
+func (tx *Tx) RevRangeIterator(min []byte, max []byte, rangeType uint8) *RangeLimitIterator {
+	return NewRevRangeLimitIterator(tx.NewIterator(), &Range{min, max, rangeType}, &Limit{0, -1})
+}
+
+//count < 0, unlimit.
+//
+//offset must >= 0, if < 0, will get nothing.
+func (tx *Tx) RangeLimitIterator(min []byte, max []byte, rangeType uint8, offset int, count int) *RangeLimitIterator {
+	return NewRangeLimitIterator(tx.NewIterator(), &Range{min, max, rangeType}, &Limit{offset, count})
+}
+
+//count < 0, unlimit.
+//
+//offset must >= 0, if < 0, will get nothing.
+func (tx *Tx) RevRangeLimitIterator(min []byte, max []byte, rangeType uint8, offset int, count int) *RangeLimitIterator {
+	return NewRevRangeLimitIterator(tx.NewIterator(), &Range{min, max, rangeType}, &Limit{offset, count})
+}