namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
var list = new HashSet<string>(101);
for (int i = 0; i < 100; i++)
{
var task = Task.Factory.StartNew((m =>
{
var id = McidGenerator.NewMcid();
list.Add(id);
Console.WriteLine($"序号:{(int)m + 1} 线程ID:{Thread.CurrentThread.ManagedThreadId} 生成的MCID:{id}");
}), i);
}
Thread.Sleep(10000);
var n = 1;
foreach (var li in list.OrderBy(i=>i))
{
Console.WriteLine($"序号:{(int)n + 1} 生成的MCID:{li}");
n++;
}
Console.ReadLine();
}
}
public static class McidGenerator
{
private const int MaxId = 9;
private static bool _allNew = true;
private static int _incrementId = 0;
private static DateTimeOffset _current = DateTimeOffset.Now;
private static readonly object SequenceLock = new object();
public static string NewMcid()
{
lock (SequenceLock)
{
var now = DateTimeOffset.Now;
if (_allNew)
{
_allNew = false;
_current = now;
return now.ToString("yyyyMMddHHmmssfffff") + _incrementId;
}
if (Convert.ToDateTime(_current.ToString("yyyy-MM-dd HH:mm:ss.fffff")) == Convert.ToDateTime(now.ToString("yyyy-MM-dd HH:mm:ss.fffff")))
{
_incrementId++;
_current = now;
return now.ToString("yyyyMMddHHmmssfffff") + _incrementId;
}
_incrementId++;
_incrementId = _incrementId > MaxId ? 0 : _incrementId;
_current = now;
return now.ToString("yyyyMMddHHmmssfffff") + _incrementId;
}
}
}
}