Hlc class

A Hybrid Logical Clock implementation. This class trades time precision for a guaranteed monotonically increasing clock in distributed systems. Inspiration: https://cse.buffalo.edu/tech-reports/2014-04.pdf

Implemented types

Constructors

Hlc(DateTime dateTime, int counter, String nodeId)
Hlc.fromDate(DateTime dateTime, String nodeId)
Instantiates an Hlc at dateTime with logical counter zero.
Hlc.now(String nodeId)
Instantiates an Hlc using the wall clock.
Hlc.parse(String timestamp)
Parse an HLC string in the format ISO8601 date-counter-node id.
factory
Hlc.zero(String nodeId)
Instantiates an Hlc at the beginning of time and space: January 1, 1970.

Properties

counter → int
final
dateTime → DateTime
final
hashCode → int
The hash code for this object.
no setteroverride
nodeId → String
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

apply({DateTime? dateTime, int? counter, String? nodeId}) → Hlc
Create a copy of this object applying the optional properties.
compareTo(Hlc other) → int
Compares this object to another object.
override
increment({DateTime? wallTime}) → Hlc
Increments the current timestamp for transmission to another system. The local wall time will be used if wallTime isn't supplied.
merge(Hlc remote, {DateTime? wallTime}) → Hlc
Compares and validates a timestamp from a remote system with the local timestamp to preserve monotonicity. Local wall time will be used if wallTime isn't supplied.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toJson() → String
Convenience method for easy json encoding.
toString() → String
A string representation of this object.
override

Operators

operator <(dynamic other) → bool
operator <=(dynamic other) → bool
operator ==(Object other) → bool
The equality operator.
override
operator >(dynamic other) → bool
operator >=(dynamic other) → bool