, DateTimeKind.Utc)).TotalMilliseconds; } private long WaitNextMillis(long lastTimestamp) { var timestamp = GetCurrentTimestamp(); while (timestamp <= lastTimestamp) { Thread.Sleep(1); timestamp = GetCurrentTimestamp(); } return timestamp; } } 复制代码 这个实现中,我们定义了一个 Snowfl...
String thatTimeStr = DateUtils.formatByDateTimePattern(thatTime); // format as string return String.format("{\"UID\":\"%d\",\"timestamp\":\"%s\",\"workerId\":\"%d\",\"sequence\":\"%d\"}", uid, thatTimeStr, workerId, sequence); } /** * Get UID // 这个方法是生成唯一 ID...
使用Stopwatch 计算时间: Stopwatch 类提供了更高精度的时间测量,可以用来替代 DateTime 类来计算时间差。private static readonly Stopwatch Stopwatch = Stopwatch.StartNew(); 复制代码使用位操作生成 ID:使用位操作可以提高 ID 生成的性能。例如,可以使用位操作将时间戳、数据中心 ID、机器 ID 和序列号组合成一...
System.out.println("GenerateDateTime=" + snowflakeIdGenerator.getGenerateDateTime(id)); System.out.println("Sequence2=" + snowflakeIdGenerator.getSequence2(id)); System.out.println("WorkerId2=" + snowflakeIdGenerator.getWorkerId2(id)); System.out.println("DataCenterId2=" + snowflakeIdGenera...
public long getGenerateDateTime(long id) { return (id >> TIMESTAMP_LEFT_SHIFT & ~(-1L << 41L)) + twepoch; } private synchronized long nextId() throws Exception { long timestamp = timeGen(); // 1、出现时钟回拨问题,直接抛异常 ...
public long getWorkerId(long id) { return id >> 12 & 31L; } public long getDataCenterId(long id) { return id >> 17 & 31L; } public long getGenerateDateTime(long id) { return (id >> 22 & 2199023255551L) + this.twepoch; ...
*@return*/publiclonggetGenerateDateTime2(longid){return(id >>> (DATA_CENTER_ID_BITS + WORKER_ID_BITS + SEQUENCE_BITS)) + twepoch; } ID生成器使用方式 在分布式ID生成的策略中,通常采用两种方式:一是基于发号器的方案,二是本地生成方案。
DATETIME DATETIME is an alias for TIMESTAMP_NTZ. TIME Snowflake supports a single TIME data type for storing times in the form ofHH:MI:SS. TIME supports an optional precision parameter for fractional seconds (for example,TIME(3)). Time precision can range from 0 (seconds) to 9 (nanosecond...
function TSnowflakeIdWorker.GetEpoch: TDateTime; begin Result := UnixToDateTime(FEpoch div MSecsPerSec, True); end; function TSnowflakeIdWorker.NextId: Int64; var Offset: Integer; Timestamp: Int64; begin FLock.Enter; try Timestamp := CurrentMilliseconds(); ...
{ String prefix = DateTime.now().toString(DatePattern.PURE_DATETIME_MS_PATTERN); return prefix + tenantId + module + RandomUtil.randomNumbers(3); } @Deprecated public synchronized String getBatchId(int tenantId, int module) { return batchId(tenantId, module); } /** * 生成的是不带-的...