public static void TestSnowflake()
{
var array = new long[1000];
Parallel.For(0, 1000, i => { array[i] = SnowFlake.Instance().NextId(); });
Console.WriteLine("Distinct count:" + array.Distinct().Count());
for (int i = 0; i < array.Length; i++)
{
Console.WriteLine(array[i]);
}
}
public static SnowFlake Instance()
{
lock (SnowflakeLock)
{
if (_snowflake != null)
{
return(_snowflake);
}
var random = new Random();
if (!int.TryParse(Environment.GetEnvironmentVariable("SF_MACHINEID", EnvironmentVariableTarget.Machine), out var machineId))
{
machineId = random.Next((int)MaxMachineCount);
}
if (!int.TryParse(Environment.GetEnvironmentVariable("SF_DATACENTERID", EnvironmentVariableTarget.Machine), out var datacenterId))
{
datacenterId = random.Next((int)MaxDatacenterCount);
}
return(_snowflake = new SnowFlake(machineId, datacenterId));
}
}
