private long GetRealMaxId(long newMaxId, SequencedIdEntity entity)
{
if (entity.UseMachineRoomId == 1)
{
newMaxId = (newMaxId << 5) | 0x1f;
}
if (entity.UseRandomTail == 1)
{
newMaxId = (newMaxId << 5) | 0x1f;
}
return(newMaxId);
}
public async Task <SequencedIdBuffer> GetBufferAsync(string businessId)
{
SequencedIdEntity sequencedId = null;
using (var trans = await _idStoreContext.Database.BeginTransactionAsync())
{
sequencedId = _idStoreContext.SequencedIds.FirstOrDefault(x => x.BusinessId == businessId);
if (sequencedId == null)
{
//创建默认记录
sequencedId = GetNewEntity(businessId);
_idStoreContext.SequencedIds.Add(sequencedId);
sequencedId = _idStoreContext.SequencedIds.FirstOrDefault(x => x.BusinessId == businessId);
}
long newMaxId = sequencedId.MaxId + sequencedId.Steps;
long newRealMaxId = GetRealMaxId(newMaxId, sequencedId);
sequencedId.MaxId = newMaxId;
sequencedId.RealMaxId = newRealMaxId;
sequencedId.UpdateTime = DateTime.Now;
_idStoreContext.SequencedIds.Update(sequencedId);
_idStoreContext.SaveChanges();
trans.Commit();
}
return(new SequencedIdBuffer()
{
BusinessId = businessId,
MaxId = sequencedId.MaxId,
UseMachineRoomId = sequencedId.UseMachineRoomId == 1,
MachineRoomId = sequencedId.MachineRoomId,
UseRandomTail = sequencedId.UseRandomTail == 1,
Description = sequencedId.Description,
RealMaxId = sequencedId.RealMaxId,
Steps = sequencedId.Steps,
CurrentId = sequencedId.MaxId - sequencedId.Steps + 1
});
}
