Add sync => go-sync

sync/data/data.go

@@ -0,0 +1,32 @@
+// Package data is an interface for key-value storage.
+package data
+
+import (
+	"errors"
+	"time"
+)
+
+var (
+	ErrNotFound = errors.New("not found")
+)
+
+// Data is a data storage interface
+type Data interface {
+	// Dump the known records
+	Dump() ([]*Record, error)
+	// Read a record with key
+	Read(key string) (*Record, error)
+	// Write a record
+	Write(r *Record) error
+	// Delete a record with key
+	Delete(key string) error
+}
+
+// Record represents a data record
+type Record struct {
+	Key        string
+	Value      []byte
+	Expiration time.Duration
+}
+
+type Option func(o *Options)