add other session providers (#5963)

vendor/github.com/lunny/nodb/const.go

@@ -0,0 +1,98 @@
+package nodb
+
+import (
+	"errors"
+)
+
+const (
+	NoneType    byte = 0
+	KVType      byte = 1
+	HashType    byte = 2
+	HSizeType   byte = 3
+	ListType    byte = 4
+	LMetaType   byte = 5
+	ZSetType    byte = 6
+	ZSizeType   byte = 7
+	ZScoreType  byte = 8
+	BitType     byte = 9
+	BitMetaType byte = 10
+	SetType     byte = 11
+	SSizeType   byte = 12
+
+	maxDataType byte = 100
+
+	ExpTimeType byte = 101
+	ExpMetaType byte = 102
+)
+
+var (
+	TypeName = map[byte]string{
+		KVType:      "kv",
+		HashType:    "hash",
+		HSizeType:   "hsize",
+		ListType:    "list",
+		LMetaType:   "lmeta",
+		ZSetType:    "zset",
+		ZSizeType:   "zsize",
+		ZScoreType:  "zscore",
+		BitType:     "bit",
+		BitMetaType: "bitmeta",
+		SetType:     "set",
+		SSizeType:   "ssize",
+		ExpTimeType: "exptime",
+		ExpMetaType: "expmeta",
+	}
+)
+
+const (
+	defaultScanCount int = 10
+)
+
+var (
+	errKeySize        = errors.New("invalid key size")
+	errValueSize      = errors.New("invalid value size")
+	errHashFieldSize  = errors.New("invalid hash field size")
+	errSetMemberSize  = errors.New("invalid set member size")
+	errZSetMemberSize = errors.New("invalid zset member size")
+	errExpireValue    = errors.New("invalid expire value")
+)
+
+const (
+	//we don't support too many databases
+	MaxDBNumber uint8 = 16
+
+	//max key size
+	MaxKeySize int = 1024
+
+	//max hash field size
+	MaxHashFieldSize int = 1024
+
+	//max zset member size
+	MaxZSetMemberSize int = 1024
+
+	//max set member size
+	MaxSetMemberSize int = 1024
+
+	//max value size
+	MaxValueSize int = 10 * 1024 * 1024
+)
+
+var (
+	ErrScoreMiss = errors.New("zset score miss")
+)
+
+const (
+	BinLogTypeDeletion uint8 = 0x0
+	BinLogTypePut      uint8 = 0x1
+	BinLogTypeCommand  uint8 = 0x2
+)
+
+const (
+	DBAutoCommit    uint8 = 0x0
+	DBInTransaction uint8 = 0x1
+	DBInMulti       uint8 = 0x2
+)
+
+var (
+	Version = "0.1"
+)