/// <summary>
/// 更新数据
/// 不存在时不更新
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public ICacheItem Update(ICacheItem item)
{
try
{
if (item == null)
{
return(null);
}
CheckUniqueIndex();
string uniqueKey = _uniqueIndex.GetIndexKey(item);
List <ICacheItem> datas = Get(uniqueKey);
if (datas.Count <= 0)
{
return(null);
}
item.Copy(datas[0]);
return(datas[0]);
}
catch (Exception ex)
{
CacheLog.LogError(string.Format("更新表数据失败：{0}, 表【{1}】;StackTrace:{2}", ex.Message, TableName, ex.StackTrace != null ? ex.StackTrace : ""));
throw ex;
}
}
/// <summary>
/// 添加缓存项
/// 索引重复，会抛出异常
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public bool Add(ICacheItem item)
{
string blockKey = _index.GetIndexKey(item);
string uniqueKey = _uniqueIndex.GetIndexKey(item);
try
{
_blockLock.EnterUpgradeableReadLock();
if (_uniqueBlock.ContainsKey(uniqueKey))
{
throw new Exception(string.Format("索引重复，数据已存在：唯一索引:{0}，区块索引:{1}", uniqueKey, blockKey));
}
try
{
_blockLock.EnterWriteLock();
if (!_block.ContainsKey(blockKey))
{
_block.Add(blockKey, new List <ICacheItem>());
}
_block[blockKey].Add(item);
_uniqueBlock.Add(uniqueKey, item);
_datas.Add(item);
CacheLog.LogDebug(string.Format("添加数据：{0}", item.ToString()));
}
catch (Exception ex)
{
throw ex;
}
finally
{
_blockLock.ExitWriteLock();
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
_blockLock.ExitUpgradeableReadLock();
}
return(true);
}