shard

package
v1.8.27 Latest Latest
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 Go to latest Published: Jun 19, 2021 License: MIT Imports: 6 Imported by: 0

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Functions

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Types

type IShortSharder added in v1.8.21 

type IShortSharder interface {
	NewRoundRobin() *ShortShardID
	NewFromSubID(subID int64) *ShortShardID
}

type IntShardID 

type IntShardID struct {
	SrcID   int64
	ShardID int64
	TypeID  int64
	LocalID int64
}

IntShardID is a numeric unique identifier that includes shard information

func BuildIntShardID 

func BuildIntShardID(shardID, typeID, localID int64) IntShardID

BuildIntShardID builds an integer ID

func ParseIntShardID 

func ParseIntShardID(id int64) IntShardID

ParseIntShardID parses an intID into a ShardID object

type ShardID 

type ShardID struct {
	// contains filtered or unexported fields
}

func NewShardID 

func NewShardID(shard, sequence int64) *ShardID

func NewShardIDFromID 

func NewShardIDFromID(id int64) *ShardID

func (*ShardID) Hash 

func (s *ShardID) Hash() uint32

hash does an FNV1a hash of the string

func (*ShardID) ID 

func (s *ShardID) ID() int64

ID returns the id of the shard

func (*ShardID) Sequence 

func (s *ShardID) Sequence() int64

func (*ShardID) Shard 

func (s *ShardID) Shard() int64

func (*ShardID) String 

func (s *ShardID) String() string

func (*ShardID) Timestamp 

func (s *ShardID) Timestamp() int64

type Sharder 

type Sharder struct {
	// contains filtered or unexported fields
}

func NewSharder 

func NewSharder(numberOfShards int64) *Sharder

func (*Sharder) CurrentShardID 

func (s *Sharder) CurrentShardID() int64

func (*Sharder) GetShardFromSubID added in v1.8.8 

func (s *Sharder) GetShardFromSubID(subID int64) int64

GetShardFromSubID returns the shard number without incrementing the internal sequence

func (*Sharder) NewFromString 

func (s *Sharder) NewFromString(str string) (shardID *ShardID, e error)

NewFromString mods the first N characters of string str against the number of shards Throws an error if str has a length of zero

func (*Sharder) NewFromSubID 

func (s *Sharder) NewFromSubID(subID int64) *ShardID

NewFromSubID returns a new ShardID based on some other value (subID) that is taken into account when generating the destination shard Allows for distribution of entries across shards to be dependent on some other value Usage: 

// This would group blog entries into shards based on createdByUserID
blogEntryID := s.NewFromSubID(createdByUserID)
blogEntryID2 := s.NewFromSubID(createdByUserID) // Same shard as line above

func (*Sharder) NewRoundRobin 

func (s *Sharder) NewRoundRobin() *ShardID

NewRoundRobin returns a new ShardID based on an incrementing sequence integer mod the number of shards Allows for an equal distribution of entries across shards

func (*Sharder) NumberOfShards 

func (s *Sharder) NumberOfShards() int64

type ShortShardID added in v1.8.17 

type ShortShardID struct {
	// contains filtered or unexported fields
}

func NewShortShardID added in v1.8.17 

func NewShortShardID(shard int64) *ShortShardID

func NewShortShardIDFromID added in v1.8.17 

func NewShortShardIDFromID(id int64) *ShortShardID

func (*ShortShardID) Hash added in v1.8.17 

func (s *ShortShardID) Hash() uint32

hash does an FNV1a hash of the string

func (*ShortShardID) ID added in v1.8.17 

func (s *ShortShardID) ID() int64

ID returns the id of the shard

func (*ShortShardID) Shard added in v1.8.17 

func (s *ShortShardID) Shard() int64

func (*ShortShardID) String added in v1.8.17 

func (s *ShortShardID) String() string

func (*ShortShardID) Timestamp added in v1.8.17 

func (s *ShortShardID) Timestamp() int64

type ShortSharder added in v1.8.17 

type ShortSharder struct {
	// contains filtered or unexported fields
}

func NewShortSharder added in v1.8.17 

func NewShortSharder(numberOfShards int64) *ShortSharder

func (*ShortSharder) CurrentShardID added in v1.8.17 

func (s *ShortSharder) CurrentShardID() int64

func (*ShortSharder) GetShardFromString added in v1.8.27 

func (s *ShortSharder) GetShardFromString(str string) (int64, error)

GetShardFromString returns the shard number without incrementing the internal sequence

func (*ShortSharder) GetShardFromSubID added in v1.8.17 

func (s *ShortSharder) GetShardFromSubID(subID int64) int64

GetShardFromSubID returns the shard number without incrementing the internal sequence

func (*ShortSharder) NewFromString added in v1.8.17 

func (s *ShortSharder) NewFromString(str string) (shardID *ShortShardID, e error)

NewFromString mods the first N characters of string str against the number of shards Throws an error if str has a length of zero

func (*ShortSharder) NewFromSubID added in v1.8.17 

func (s *ShortSharder) NewFromSubID(subID int64) *ShortShardID

NewFromSubID returns a new ShortShardID based on some other value (subID) that is taken into account when generating the destination shard Allows for distribution of entries across shards to be dependent on some other value Usage: 

// This would group blog entries into shards based on createdByUserID
blogEntryID := s.NewFromSubID(createdByUserID)
blogEntryID2 := s.NewFromSubID(createdByUserID) // Same shard as line above

func (*ShortSharder) NewRoundRobin added in v1.8.17 

func (s *ShortSharder) NewRoundRobin() *ShortShardID

NewRoundRobin returns a new ShortShardID based on an incrementing sequence integer mod the number of shards Allows for an equal distribution of entries across shards

func (*ShortSharder) NumberOfShards added in v1.8.17 

func (s *ShortSharder) NumberOfShards() int64

type StringShardID 

type StringShardID struct {
	SrcID   string
	ShardID int64
	TypeID  int64
	LocalID int64
}

StringShardID is a string unique identifier that includes shard information

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