redis sessiondb: support more than one driver - builtin redigo(default) and radix - rel to: #1328

Former-commit-id: 1eee58f2c49f64899fffc3ad61bcf074f8949cc1

sessions/sessiondb/redis/driver.go

@@ -0,0 +1,34 @@
+package redis
+
+// Driver is the interface which each supported redis client
+// should support in order to be used in the redis session database.
+type Driver interface {
+	Connect(c Config) error
+	PingPong() (bool, error)
+	CloseConnection() error
+	Set(key string, value interface{}, secondsLifetime int64) error
+	Get(key string) (interface{}, error)
+	TTL(key string) (seconds int64, hasExpiration bool, found bool)
+	UpdateTTL(key string, newSecondsLifeTime int64) error
+	UpdateTTLMany(prefix string, newSecondsLifeTime int64) error
+	GetAll() (interface{}, error)
+	GetKeys(prefix string) ([]string, error)
+	Delete(key string) error
+}
+
+var (
+	_ Driver = (*RedigoDriver)(nil)
+	_ Driver = (*RadixDriver)(nil)
+)
+
+// Redigo returns the driver for the redigo go redis client.
+// Which is the default one.
+// You can customize further any specific driver's properties.
+func Redigo() *RedigoDriver {
+	return &RedigoDriver{}
+}
+
+// Radix returns the driver for the radix go redis client.
+func Radix() *RadixDriver {
+	return &RadixDriver{}
+}