forked from mirror/ledisdb
145 lines
2.6 KiB
Go
145 lines
2.6 KiB
Go
package ledis
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import (
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"errors"
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)
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const Version = "0.4"
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type DataType byte
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// for out use
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const (
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KV DataType = iota
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LIST
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HASH
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SET
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ZSET
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)
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func (d DataType) String() string {
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switch d {
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case KV:
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return KVName
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case LIST:
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return ListName
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case HASH:
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return HashName
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case SET:
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return SetName
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case ZSET:
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return ZSetName
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default:
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return "unknown"
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}
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}
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const (
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KVName = "KV"
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ListName = "LIST"
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HashName = "HASH"
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SetName = "SET"
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ZSetName = "ZSET"
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)
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// for backend store
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const (
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NoneType byte = 0
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KVType byte = 1
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HashType byte = 2
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HSizeType byte = 3
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ListType byte = 4
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LMetaType byte = 5
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ZSetType byte = 6
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ZSizeType byte = 7
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ZScoreType byte = 8
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BitType byte = 9
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BitMetaType byte = 10
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SetType byte = 11
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SSizeType byte = 12
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maxDataType byte = 100
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/*
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I make a big mistake about TTL time key format and have to use a new one (change 101 to 103).
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You must run the ledis-upgrade-ttl to upgrade db.
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*/
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ObsoleteExpTimeType byte = 101
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ExpMetaType byte = 102
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ExpTimeType byte = 103
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MetaType byte = 201
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)
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var (
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TypeName = map[byte]string{
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KVType: "kv",
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HashType: "hash",
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HSizeType: "hsize",
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ListType: "list",
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LMetaType: "lmeta",
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ZSetType: "zset",
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ZSizeType: "zsize",
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ZScoreType: "zscore",
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BitType: "bit",
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BitMetaType: "bitmeta",
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SetType: "set",
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SSizeType: "ssize",
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ExpTimeType: "exptime",
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ExpMetaType: "expmeta",
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}
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)
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const (
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defaultScanCount int = 10
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)
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var (
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errKeySize = errors.New("invalid key size")
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errValueSize = errors.New("invalid value size")
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errHashFieldSize = errors.New("invalid hash field size")
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errSetMemberSize = errors.New("invalid set member size")
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errZSetMemberSize = errors.New("invalid zset member size")
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errExpireValue = errors.New("invalid expire value")
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)
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const (
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//we don't support too many databases
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MaxDBNumber uint8 = 16
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//max key size
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MaxKeySize int = 1024
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//max hash field size
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MaxHashFieldSize int = 1024
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//max zset member size
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MaxZSetMemberSize int = 1024
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//max set member size
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MaxSetMemberSize int = 1024
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//max value size
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MaxValueSize int = 1024 * 1024 * 1024
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)
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var (
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ErrScoreMiss = errors.New("zset score miss")
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ErrWriteInROnly = errors.New("write not support in readonly mode")
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ErrRplInRDWR = errors.New("replication not support in read write mode")
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ErrRplNotSupport = errors.New("replication not support")
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)
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const (
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DBAutoCommit uint8 = 0x0
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DBInTransaction uint8 = 0x1
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DBInMulti uint8 = 0x2
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)
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const (
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BitAND = "and"
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BitOR = "or"
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BitXOR = "xor"
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BitNot = "not"
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)
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