/// <summary>
/// 打开链接，允许切从。
/// </summary>
internal bool OpenCon(ConnBean cb, AllowConnLevel leve)
{
try
{
if (cb == null)
{
cb = useConnBean;
if (isOpenTrans && cb.IsSlave)
{
ResetConn(connObject.Master);
}
}
if (!cb.IsOK)
{
if ((int)leve > 1 && connObject.BackUp != null && connObject.BackUp.IsOK)
{
ResetConn(connObject.BackUp); //重置链接。
connObject.InterChange(); //主从换位置
return(OpenCon(connObject.Master, leve));
}
else if ((int)leve > 2)
{
//主挂了，备也挂了（因为备会替主）
ConnBean nextSlaveBean = connObject.GetSlave();
if (nextSlaveBean != null)
{
ResetConn(nextSlaveBean);//重置链接。
return(OpenCon(nextSlaveBean, leve));
}
}
}
else if (!isOpenTrans && cb != useConnBean && isAllowResetConn && connObject.IsAllowSlave())
{
ResetConn(cb);//,_IsAllowRecordSql只有读数据错误才切，表结构错误不切？
}
if (useConnBean.IsOK)
{
Open();//异常抛
}
else
{
WriteError("OpenCon():" + useConnBean.ErrorMsg);
}
if (IsAllowRecordSql)
{
_watch.Start();
}
return(useConnBean.IsOK);
}
catch (DbException err)
{
useConnBean.IsOK = false;
useConnBean.ErrorMsg = err.Message;
return(OpenCon(null, leve));
}
}
/// <summary>
/// 测试链接
/// </summary>
/// <param name="allowLevel">1：只允许当前主链接；2：允许主备链接；3：允许主备从链接</param>
/// <returns></returns>
internal bool TestConn(AllowConnLevel allowLevel)
{
threadCount = 0;
openOKFlag = -1;
ConnObject obj = connObject;
if (obj.Master != null && obj.Master.IsOK && (int)allowLevel >= 1)
{
threadCount++;
Thread thread = new Thread(new ParameterizedThreadStart(TestOpen));
thread.Start(obj.Master);
}
Thread.Sleep(30);
if (openOKFlag == -1 && obj.BackUp != null && obj.BackUp.IsOK && (int)allowLevel >= 2)
{
threadCount++;
Thread.Sleep(30);
Thread thread = new Thread(new ParameterizedThreadStart(TestOpen));
thread.Start(obj.BackUp);
}
if (openOKFlag == -1 && obj.Slave != null && obj.Slave.Count > 0 && (int)allowLevel >= 3)
{
for (int i = 0; i < obj.Slave.Count; i++)
{
Thread.Sleep(30);
if (openOKFlag == -1 && obj.Slave[i].IsOK)
{
threadCount++;
Thread thread = new Thread(new ParameterizedThreadStart(TestOpen));
thread.Start(obj.Slave[i]);
}
}
}
int sleepTimes = 0;
while (openOKFlag == -1)
{
sleepTimes += 30;
if (sleepTimes > 3000 || threadCount == errorCount)
{
break;
}
Thread.Sleep(30);
}
return(openOKFlag == 1);
}