unit uIdGeneratorOptions;
interface
uses
System.DateUtils, System.SysUtils;
type
TIdGeneratorOptions = class
private
FMethod: SmallInt;
// FBaseTime: TDateTime;
FBaseTime: Int64;
FWorkerId: Word;
FWorkerIdBitLength: Byte;
FSeqBitLength: Byte;
FMaxSeqNumber: Integer;
FMinSeqNumber: Word;
FTopOverCostCount: Integer;
FDataCenterId: Cardinal;
FDataCenterIdBitLength: Byte;
FTimestampType: Byte;
public
///
/// 雪花计算方法
/// (1-漂移算法|2-传统算法),默认1
///
property Method: SmallInt read FMethod write FMethod default 1;
///
/// 基础时间(UTC格式)
/// 不能超过当前系统时间
///
// property BaseTime: TDateTime read FBaseTime write FBaseTime;
property BaseTime: Int64 read FBaseTime write FBaseTime;
///
/// 机器码
/// 必须由外部设定,最大值 2^WorkerIdBitLength-1
///
property WorkerId: Word read FWorkerId write FWorkerId default 0;
///
/// 机器码位长
/// 默认值6,取值范围 [1, 15](要求:序列数位长+机器码位长不超过22)
///
property WorkerIdBitLength: Byte read FWorkerIdBitLength write FWorkerIdBitLength default 6; // 10;
///
/// 序列数位长
/// 默认值6,取值范围 [3, 21](要求:序列数位长+机器码位长不超过22)
///
property SeqBitLength: Byte read FSeqBitLength write FSeqBitLength default 6; // 10;
///
/// 最大序列数(含)
/// 设置范围 [MinSeqNumber, 2^SeqBitLength-1],默认值0,表示最大序列数取最大值(2^SeqBitLength-1])
///
property MaxSeqNumber: Integer read FMaxSeqNumber write FMaxSeqNumber default 0;
///
/// 最小序列数(含)
/// 默认值5,取值范围 [5, MaxSeqNumber],每毫秒的前5个序列数对应编号0-4是保留位,其中1-4是时间回拨相应预留位,0是手工新值预留位
///
property MinSeqNumber: Word read FMinSeqNumber write FMinSeqNumber default 5;
///
/// 最大漂移次数(含),
/// 默认2000,推荐范围500-10000(与计算能力有关)
///
property TopOverCostCount: Integer read FTopOverCostCount write FTopOverCostCount default 2000;
///
/// 数据中心ID(默认0)
///
property DataCenterId: Cardinal read FDataCenterId write FDataCenterId default 0;
///
/// 数据中心ID长度(默认0)
///
property DataCenterIdBitLength: Byte read FDataCenterIdBitLength write FDataCenterIdBitLength default 0;
///
/// 时间戳类型(0-毫秒,1-秒),默认0
///
property TimestampType: Byte read FTimestampType write FTimestampType default 0;
constructor Create(); overload;
constructor Create(WorkerId: Word); overload;
end;
implementation
{ TIdGeneratorOptions }
constructor TIdGeneratorOptions.Create(WorkerId: Word);
begin
FBaseTime := 1582136402000; // EncodeDateTime(2020, 2, 20, 2, 20, 2, 20);
FWorkerId := WorkerId;
end;
constructor TIdGeneratorOptions.Create();
begin
FBaseTime := 1582136402000; // EncodeDateTime(2020, 2, 20, 2, 20, 2, 20);
end;
end.