/// <summary>
/// 获取存在的实例
/// </summary>
/// <param name="mLastDateStr"></param>
/// <param name="dbName"></param>
/// <param name="maxCount"></param>
/// <returns></returns>
private static T getExistsInstance(string mLastDateStr, string dbName, long maxCount)
{
T mInstance = new T();
mInstanceListLock.EnterReadLock();
try
{
string dataKey = YunMapCacheHelper.getInstanceName(mLastDateStr, dbName, maxCount);
if (mInstanceList.ContainsKey(dataKey))
{
mInstance = mInstanceList[dataKey];
}
}
catch (Exception ex)
{
YunLib.LogWriter.Log(ex.ToString());
}
mInstanceListLock.ExitReadLock();
return(mInstance);
}
/// <summary>
/// 获取一个新的实例
/// </summary>
/// <returns></returns>
private static T getNewInstance(string mLastDateStr, string dbName, long maxCount)
{
T mInstance = new T();
mInstanceListLock.EnterWriteLock();
try
{
string dataKey = YunMapCacheHelper.getInstanceName(mLastDateStr, dbName, maxCount);
//可能多个写锁触发,先判断
if (mInstanceList.ContainsKey(dataKey))
{
mInstance = mInstanceList[dataKey];
}
else
{
mInstance.InitCache(dataKey, maxCount);
if (mInstance.IsCacheValid())
{
mInstanceList.Add(dataKey, mInstance);
}
}
//清理过期数据缓存
clearOutDateCache(mLastDateStr);
}
catch (Exception ex)
{
YunLib.LogWriter.Log(ex.ToString());
}
mInstanceListLock.ExitWriteLock();
return(mInstance);
}
