/// <summary>
/// 获得序列
/// </summary>
/// <param name="fullName">序列名</param>
/// <param name="defaultSequence">默认序列</param>
/// <returns>序列实体</returns>
protected BaseSequenceEntity GetSequenceByLock(string fullName, int defaultSequence)
{
BaseSequenceEntity sequenceEntity = new BaseSequenceEntity();
// 这里主要是为了判断是否存在
sequenceEntity = this.GetEntityByName(fullName);
if (sequenceEntity == null)
{
// 这里添加记录时加锁机制。
// 是否已经被锁住
this.ReturnStatusCode = StatusCode.CanNotLock.ToString();
for (int i = 0; i < BaseSystemInfo.LockNoWaitCount; i++)
{
// 被锁定的记录数
int lockCount = DbLogic.LockNoWait(DbHelper, BaseSequenceEntity.TableName, new KeyValuePair <string, object>(BaseSequenceEntity.FieldFullName, BaseSequenceEntity.TableName));
if (lockCount > 0)
{
sequenceEntity.FullName = fullName;
sequenceEntity.Reduction = defaultSequence - 1;
sequenceEntity.Sequence = defaultSequence;
sequenceEntity.Step = DefaultStep;
this.AddEntity(sequenceEntity);
this.ReturnStatusCode = StatusCode.LockOK.ToString();
break;
}
else
{
System.Threading.Thread.Sleep(BaseRandom.GetRandom(1, BaseSystemInfo.LockNoWaitTickMilliSeconds));
}
}
if (this.ReturnStatusCode == StatusCode.LockOK.ToString())
{
// JiRiGaLa 这个是否能省略
sequenceEntity = this.GetEntityByName(fullName);
}
}
else
{
// 若记录已经存在，加锁，然后读取记录。
// 是否已经被锁住
this.ReturnStatusCode = StatusCode.CanNotLock.ToString();
for (int i = 0; i < BaseSystemInfo.LockNoWaitCount; i++)
{
// 被锁定的记录数
int lockCount = DbLogic.LockNoWait(DbHelper, BaseSequenceEntity.TableName, new KeyValuePair <string, object>(BaseSequenceEntity.FieldFullName, fullName));
if (lockCount > 0)
{
sequenceEntity = this.GetEntityByName(fullName);
this.ReturnStatusCode = StatusCode.LockOK.ToString();
break;
}
else
{
System.Threading.Thread.Sleep(BaseRandom.GetRandom(1, BaseSystemInfo.LockNoWaitTickMilliSeconds));
}
}
}
return(sequenceEntity);
}