Merge pull request #6 from chenyanchen/deprecated/BatchKV

Deprecated BatchKV, use KV instead.

eamples/batch/main.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/chenyanchen/db"
+)
+
+func main() {
+	// You can define K as all comparable types, like this:
+	// array: [3]int64
+	// string (SQL): "id in (1, 2, 3)"
+	// string (JSON): `{"ids": [1, 2, 3]}`
+	var mapKV db.KV[[3]int64, []Content] = NewMapKV()
+
+	if err := mapKV.Set(nil, [3]int64{}, []Content{{ID: 1, Title: "A"}, {ID: 2, Title: "B"}}); err != nil {
+		panic(err)
+	}
+
+	contents, err := mapKV.Get(nil, [3]int64{1, 3})
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println("contents:", contents)
+	// output: contents: [{1 A}]
+}
+
+type Content struct {
+	ID    int64
+	Title string
+}
+
+type mapKV struct {
+	m map[int64]Content
+}
+
+func NewMapKV() *mapKV {
+	return &mapKV{m: make(map[int64]Content)}
+}
+
+func (s *mapKV) Get(ctx context.Context, ids [3]int64) ([]Content, error) {
+	var contents []Content
+	for _, id := range ids {
+		content, ok := s.m[id]
+		if !ok {
+			continue
+		}
+		contents = append(contents, content)
+	}
+	return contents, nil
+}
+
+func (s *mapKV) Set(ctx context.Context, ids [3]int64, contents []Content) error {
+	for _, content := range contents {
+		s.m[content.ID] = content
+	}
+	return nil
+}
+
+func (s *mapKV) Del(ctx context.Context, ids [3]int64) error {
+	for _, id := range ids {
+		delete(s.m, id)
+	}
+	return nil
+}