forked from nutsdb/nutsdb
/
metadata.go
204 lines (154 loc) · 4.83 KB
/
metadata.go
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package nutsdb
// DataStructure represents the data structure we have already supported
type DataStructure = uint16
// DataFlag means the data operations have done by users.
type DataFlag = uint16
// DataStatus means the status of data
type DataStatus = uint16
const (
// DataStructureSet represents the data structure set flag
DataStructureSet DataStructure = 0
// DataStructureSortedSet represents the data structure sorted set flag
DataStructureSortedSet DataStructure = 1
// DataStructureBTree represents the data structure b tree flag
DataStructureBTree DataStructure = 2
// DataStructureList represents the data structure list flag
DataStructureList DataStructure = 3
)
const (
// DataDeleteFlag represents the data delete flag
DataDeleteFlag DataFlag = 0
// DataSetFlag represents the data set flag
DataSetFlag DataFlag = 1
// DataLPushFlag represents the data LPush flag
DataLPushFlag DataFlag = 2
// DataRPushFlag represents the data RPush flag
DataRPushFlag DataFlag = 3
// DataLRemFlag represents the data LRem flag
DataLRemFlag DataFlag = 4
// DataLPopFlag represents the data LPop flag
DataLPopFlag DataFlag = 5
// DataRPopFlag represents the data RPop flag
DataRPopFlag DataFlag = 6
// DataLTrimFlag represents the data LTrim flag
DataLTrimFlag DataFlag = 8
// DataZAddFlag represents the data ZAdd flag
DataZAddFlag DataFlag = 9
// DataZRemFlag represents the data ZRem flag
DataZRemFlag DataFlag = 10
// DataZRemRangeByRankFlag represents the data ZRemRangeByRank flag
DataZRemRangeByRankFlag DataFlag = 11
// DataZPopMaxFlag represents the data ZPopMax flag
DataZPopMaxFlag DataFlag = 12
// DataZPopMinFlag represents the data aZPopMin flag
DataZPopMinFlag DataFlag = 13
// DataSetBucketDeleteFlag represents the delete Set bucket flag
DataSetBucketDeleteFlag DataFlag = 14
// DataSortedSetBucketDeleteFlag represents the delete Sorted Set bucket flag
DataSortedSetBucketDeleteFlag DataFlag = 15
// DataBTreeBucketDeleteFlag represents the delete BTree bucket flag
DataBTreeBucketDeleteFlag DataFlag = 16
// DataListBucketDeleteFlag represents the delete List bucket flag
DataListBucketDeleteFlag DataFlag = 17
// DataLRemByIndex represents the data LRemByIndex flag
DataLRemByIndex DataFlag = 18
// DataExpireListFlag represents that set ttl for the list
DataExpireListFlag DataFlag = 19
)
const (
// UnCommitted represents the tx unCommitted status
UnCommitted uint16 = 0
// Committed represents the tx committed status
Committed uint16 = 1
)
// Persistent represents the data persistent flag
const Persistent uint32 = 0
type MetaData struct {
KeySize uint32
ValueSize uint32
Timestamp uint64
TTL uint32
Flag DataFlag // delete / set
BucketSize uint32
TxID uint64
Status DataStatus // committed / uncommitted
Ds DataStructure // data structure
Crc uint32
BucketId BucketId
}
func (meta *MetaData) Size() int64 {
// CRC
size := 4
size += UvarintSize(uint64(meta.KeySize))
size += UvarintSize(uint64(meta.ValueSize))
size += UvarintSize(meta.Timestamp)
size += UvarintSize(uint64(meta.TTL))
size += UvarintSize(uint64(meta.Flag))
size += UvarintSize(meta.TxID)
size += UvarintSize(uint64(meta.Status))
size += UvarintSize(uint64(meta.Ds))
size += UvarintSize(meta.BucketId)
return int64(size)
}
func (meta *MetaData) PayloadSize() int64 {
return int64(meta.BucketSize) + int64(meta.KeySize) + int64(meta.ValueSize)
}
func NewMetaData() *MetaData {
return new(MetaData)
}
func (meta *MetaData) WithKeySize(keySize uint32) *MetaData {
meta.KeySize = keySize
return meta
}
func (meta *MetaData) WithValueSize(valueSize uint32) *MetaData {
meta.ValueSize = valueSize
return meta
}
func (meta *MetaData) WithTimeStamp(timestamp uint64) *MetaData {
meta.Timestamp = timestamp
return meta
}
func (meta *MetaData) WithTTL(ttl uint32) *MetaData {
meta.TTL = ttl
return meta
}
func (meta *MetaData) WithFlag(flag uint16) *MetaData {
meta.Flag = flag
return meta
}
func (meta *MetaData) WithBucketSize(bucketSize uint32) *MetaData {
meta.BucketSize = bucketSize
return meta
}
func (meta *MetaData) WithTxID(txID uint64) *MetaData {
meta.TxID = txID
return meta
}
func (meta *MetaData) WithStatus(status uint16) *MetaData {
meta.Status = status
return meta
}
func (meta *MetaData) WithDs(ds uint16) *MetaData {
meta.Ds = ds
return meta
}
func (meta *MetaData) WithCrc(crc uint32) *MetaData {
meta.Crc = crc
return meta
}
func (meta *MetaData) WithBucketId(bucketID uint64) *MetaData {
meta.BucketId = bucketID
return meta
}
func (meta *MetaData) IsBPlusTree() bool {
return meta.Ds == DataStructureBTree
}
func (meta *MetaData) IsSet() bool {
return meta.Ds == DataStructureSet
}
func (meta *MetaData) IsSortSet() bool {
return meta.Ds == DataStructureSortedSet
}
func (meta *MetaData) IsList() bool {
return meta.Ds == DataStructureList
}