randz

Documentation

Index

• Constants
• Variables
• func SetIdGeneratorStartTime(t time.Time)
• func SetStrGeneratorCharSet(charSet string)
• func String(n int) string
• type CountGenerator
  • func (r *CountGenerator) AddRule(period, periodEndMaxIncr, interval, intervalMaxIncr int)
  • func (r *CountGenerator) Generate(id string, diff int) int
  • func (r *CountGenerator) Max(diff int) int
  • func (r *CountGenerator) Min(diff int) int
• type ID
  • func Id() ID
  • func ParseBase32(b []byte) (ID, error)
  • func (f ID) Base2() string
  • func (f ID) Base32() string
  • func (f ID) Base36() string
  • func (f ID) Int64() int64
  • func (f ID) String() string
• type IdGenerator
  • func NewIdGenerator(startTime time.Time, randBit int) IdGenerator
  • func (r *IdGenerator) Generate() ID
• type LockRandSource
  • func NewLockRandSource(seed int64) *LockRandSource
  • func (r *LockRandSource) Int63() int64
  • func (r *LockRandSource) Seed(seed int64)
• type StrGenerator
  • func NewStrGenerator(charSet string, randSource rand.Source) StrGenerator
  • func (r *StrGenerator) Generate(n int) string

Constants

const (
	CHAR_SET       = "ABCDEFGHJKMNPQRSTUVWXYZ23456789"
	CHAR_LOWER_SET = "abcdefghjkmnpqrstuvwxyz23456789"
)

Variables

var ErrInvalidBase32 = errors.New("invalid base32")

Functions

func SetIdGeneratorStartTime

func SetIdGeneratorStartTime(t time.Time)

SetIdGeneratorStartTime set the start time of the default id generator

func SetStrGeneratorCharSet

func SetStrGeneratorCharSet(charSet string)

func String

func String(n int) string

String returns a random string with the specified length.

Types

type CountGenerator

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

CountGenerator is a generator for count

func (*CountGenerator) AddRule

func (r *CountGenerator) AddRule(period, periodEndMaxIncr, interval, intervalMaxIncr int)

AddRule add count increase rule

func (*CountGenerator) Generate

func (r *CountGenerator) Generate(id string, diff int) int

Generate generate count

func (*CountGenerator) Max

func (r *CountGenerator) Max(diff int) int

Max return max count

func (*CountGenerator) Min

func (r *CountGenerator) Min(diff int) int

Min return min count

type ID

type ID int64

ID is alias of int64

func Id

func Id() ID

Id return a random id

func ParseBase32

func ParseBase32(b []byte) (ID, error)

ParseBase32 parse the base32 string to id

func (ID) Base2

func (f ID) Base2() string

Base2 return the base2 string of id

func (ID) Base32

func (f ID) Base32() string

Base32 return the base32 string of id

func (ID) Base36

func (f ID) Base36() string

Base36 return the base36 string of id

func (ID) Int64

func (f ID) Int64() int64

Int64 return int64

func (ID) String

func (f ID) String() string

String return the string of id

type IdGenerator

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

IdGenerator is a id generator

func NewIdGenerator

func NewIdGenerator(startTime time.Time, randBit int) IdGenerator

NewIdGenerator | 1 bit Unused | 41bit timestamp | 2~22bit rand |

func (*IdGenerator) Generate

func (r *IdGenerator) Generate() ID

Generate generate a id

type LockRandSource

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

func NewLockRandSource

func NewLockRandSource(seed int64) *LockRandSource

func (*LockRandSource) Int63

func (r *LockRandSource) Int63() int64

func (*LockRandSource) Seed

func (r *LockRandSource) Seed(seed int64)

type StrGenerator

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

StrGenerator is a random string generator.

func NewStrGenerator

func NewStrGenerator(charSet string, randSource rand.Source) StrGenerator

NewStrGenerator returns a new StrGenerator.

func (*StrGenerator) Generate

func (r *StrGenerator) Generate(n int) string

Generate returns a random string with the specified length.