/// <summary>
/// 获取快照权重的列表
/// </summary>
/// <returns></returns>
static List <int> GetSnapWeightList()
{
List <int> snapWeightList = new List <int>();
foreach (DbSnapInfo dbSnapInfo in DbSnapConfigs.GetEnableSnapList())
{
snapWeightList.Add(dbSnapInfo.Weight);
}
return(snapWeightList);
}
public DbSnapInfo GetConnectDbSnap()
{
lock (lockHelper)
{
if (curentSnapIndex >= DbSnapConfigs.GetEnableSnapList().Count)
{
curentSnapIndex = (curentSnapIndex) % DbSnapConfigs.GetEnableSnapList().Count;
}
return(DbSnapConfigs.GetEnableSnapList()[curentSnapIndex++]);
}
}
/// <summary>
/// 获取应用当前负载均衡调度算法下的快照链接信息
/// </summary>
/// <returns></returns>
public DbSnapInfo GetConnectDbSnap()
{
lock (lockHelper)
{
DbSnapInfo current = RoundRobinScheduling();
if (current != null)
{
return(current);
}
else
{
return(DbSnapConfigs.GetEnableSnapList()[0]);
}
}
}
/// <summary>
/// 权重轮询调度算法
/// </summary>
static DbSnapInfo RoundRobinScheduling()
{
while (true)
{
curentSnapIndex = (curentSnapIndex + 1) % DbSnapConfigs.GetEnableSnapList().Count;
if (curentSnapIndex == 0)
{
currentWeight = currentWeight - gcd;
if (currentWeight <= 0)
{
currentWeight = maxWeight;
if (currentWeight == 0)
{
return(null);
}
}
}
if (DbSnapConfigs.GetEnableSnapList()[curentSnapIndex].Weight >= currentWeight)
{
return(DbSnapConfigs.GetEnableSnapList()[curentSnapIndex]);
}
}
}