From e626cee8f7de0dd3ffca4c7297e59a87f790cc02 Mon Sep 17 00:00:00 2001
From: sangtran <tranquangsang12.7@gmail.com>
Date: Sat, 5 Sep 2026 17:06:30 +0700
Subject: feat: add on pebble state backend and using sync Pool to reuse buffer
 []byte

---
 state/pebble_backend.go | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

(limited to 'state/pebble_backend.go')

diff --git a/state/pebble_backend.go b/state/pebble_backend.go
index e428988..fbb8d68 100644
--- a/state/pebble_backend.go
+++ b/state/pebble_backend.go
@@ -33,10 +33,11 @@ func NewPebbleStateBackend(dir string, maxParalleism int) (*PebbleStateBackend,
 		return nil, fmt.Errorf("failed to open pebbledb %w", err)
 	}
 	return &PebbleStateBackend{
-		maxParallelism: maxParalleism,
-		db:             db,
-		stateMap:       make(map[string]uint8),
-		nextStateID:    1,
+		maxParallelism:   maxParalleism,
+		db:               db,
+		stateMap:         make(map[string]uint8),
+		nextStateID:      1,
+		currentNamespace: &core.VoidNamespace{},
 	}, nil
 }
 
@@ -60,23 +61,27 @@ func (p *PebbleStateBackend) GetCurrentNamespace() any {
 }
 
 // GetValueState(ctx context.Context, key string) (ValueState[any], error)
-func (p *PebbleStateBackend) GetValueState(ctx context.Context, statename string) (core.ValueState[any], error) {
-	stateID := p.getStateID(statename)
-	return nil, nil
+func (p *PebbleStateBackend) GetValueState(ctx context.Context, stateName string) (core.ValueState[any], error) {
+	stateID := p.getStateID(stateName)
+
+	return &pebbleStateValue{
+		backend: p,
+		stateID: stateID,
+	}, nil
 }
 
-func (p *PebbleStateBackend) getStateID(statename string) uint8 {
+func (p *PebbleStateBackend) getStateID(stateName string) uint8 {
 	p.mu.Lock()
 	defer p.mu.Unlock()
 
-	if _, ok := p.stateMap[statename]; !ok {
+	if _, ok := p.stateMap[stateName]; !ok {
 
 		id := p.nextStateID
-		p.stateMap[statename] = id
+		p.stateMap[stateName] = id
 		p.nextStateID++
 	}
 
-	return p.stateMap[statename]
+	return p.stateMap[stateName]
 }
 
 func (p *PebbleStateBackend) calculateNamespaceSize() int {
@@ -94,7 +99,7 @@ func (p *PebbleStateBackend) calculateNamespaceSize() int {
 	return nsLen
 }
 
-func (p *PebbleStateBackend) deserialize(statename string) []byte {
+func (p *PebbleStateBackend) deserialize(stateID uint8) []byte {
 	// this will store in SSTable, order is important, keygroup MUST be first for scaling
 	// 2B(KeyGroup) + 1B(StateID) + 2B(KeyLen) + len(Key) + 16B(Window)
 
@@ -105,7 +110,6 @@ func (p *PebbleStateBackend) deserialize(statename string) []byte {
 	b = binary.BigEndian.AppendUint16(b, uint16(p.currentGroupKey))
 
 	// add state id
-	stateID := p.getStateID(statename)
 	b = append(b, stateID)
 
 	// add key
-- 
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