/// <summary>
/// 判断数据是否存在,如果存在则返回Key
/// </summary>
public IEnumerable <string> Exist(IEnumerable <string> keyGroup)
{
//Aop
BeforeGet(keyGroup);
//获取当前存储Key
var cur = ExistInner(keyGroup);///ToDo:Same Mode With Get
if (!OnlyGetCurMedia)
{
//获取下级存储Key
var nextKeyGroup = keyGroup.Except(cur);
if (nextKeyGroup.Any())
{
var next = NextMedia.Exist(nextKeyGroup);
if (next.Any())
{
//合并数据
var merge = cur.ToList();
merge.AddRange(next);
cur = merge;
}
}
}
return(cur);
}
/// <summary>
/// 获取数据
/// </summary>
public IEnumerable <T> Get(IEnumerable <string> keyGroup)
{
//Aop
BeforeGet(keyGroup);
//先从当前存储获取数据
var cur = GetInner(keyGroup);
if (!OnlyGetCurMedia)
{
//再从下级存储获取数据
var nextKeyGroup = keyGroup.Except(cur.Select(item => item.Key_));
if (nextKeyGroup.Any())
{
var next = NextMedia.Get(nextKeyGroup);
if (next.Any())
{
//合并数据
var merge = cur.ToList();
merge.AddRange(next);
cur = merge;
//将下级的数据存储起来
AddInner(next);
}
}
}
return(cur);
}
/// <summary>
/// 新增数据
/// </summary>
public void Add(IEnumerable <T> group)
{
//如果Buffer存储不为空,则存到Buffer里
if (BufferMedia != null)
{
lock (_BufferLock)
{
if (_IsToBuffer)
{
//添加到Buffer
BufferMedia.Add(group);
_BufferCount += group.Count();
//如果超出最大数量,则清空Buffer
if (MaxBufferCount != null && _BufferCount >= MaxBufferCount)
{
FlushBuffer();
}
return;
}
}
}
//先添加下级存储数据
if (NextMedia != null)
{
NextMedia.Add(group);
}
//Aop
BeforeUpdate(group);
//再添加当前存储数据
AddInner(group);
}
/// <summary>
/// 删除数据
/// </summary>
public void Delete(IEnumerable <string> keyGroup)
{
//先删除下级存储数据
if (NextMedia != null)
{
NextMedia.Delete(keyGroup);
}
//Aop
BeforeDelete(keyGroup);
//再删除当前存储数据
DeleteInner(keyGroup);
}
/// <summary>
/// 更新数据
/// </summary>
public void Update(IEnumerable <T> group)
{
//先更新下级存储数据
if (NextMedia != null)
{
NextMedia.Update(group);
}
//Aop
BeforeUpdate(group);
//再更新当前存储数据
UpdateInner(group);
}
/// <summary>
/// 获取前执行的操作
/// </summary>
public virtual void BeforeGet(IEnumerable <string> keyGroup)
{
if (!_HasGet)
{
//如果是全部加载,则加载全部数据
if (IsLoadAll && NextMedia != null)
{
var next = NextMedia.GetAll();
AddInner(next);
}
_HasGet = true;
}
}
/// <summary>
/// 删除所有数据
/// </summary>
public void DeleteAll()
{
//删除下级数据
if (NextMedia != null)
{
NextMedia.DeleteAll();
}
//Aop
BeforeDelete(null);
//删除本级数据
DeleteAllInner();
}
/// <summary>
/// 获取数据总数
/// </summary>
public int Count()
{
//Aop
BeforeGet(null);
if (OnlyGetCurMedia)
{
//获取当前存储数据总数
var count = CountInner();
return(count);
}
else
{
//获取下级存储数据总数
var count = NextMedia.Count();
return(count);
}
}
/// <summary>
/// 获取所有数据
/// </summary>
public IEnumerable <T> GetAll()
{
//Aop
BeforeGet(null);
if (OnlyGetCurMedia)
{
//从当前存储获取数据
var group = GetAllInner();
return(group);
}
else
{
//从下级存储获取数据
var group = NextMedia.GetAllInner();
return(group);
}
}