public StreamItem GetStream(string strFilePath,
FileMode mode,
FileAccess access,
bool bAddToCollection = true)
{
if (bAddToCollection == false)
{
StreamItem item = NewItem(strFilePath, mode, access, false);
Debug.Assert(item.FileStream != null, "");
return(item);
}
{
StreamItem item = this.FindItem(strFilePath, access);
if (item != null)
{
item.Touch();
Debug.Assert(item.FileStream != null, "");
return(item);
}
item = NewItem(strFilePath, mode, access);
Debug.Assert(item.FileStream != null, "");
return(item);
}
}
public void ReturnStream(StreamItem item)
{
if (item.Fly)
{
/*
* if (item.FileStream != null)
* {
* if ((item.FileAccess & FileAccess.Write) != 0)
* item.FileStream.Flush(); // 2019/9/2
* item.FileStream.Close();
* item.FileStream = null;
* }
*/
item.Close();
item.DecUse();
item.Dispose();
return;
}
if (item.FileStream != null)
{
if ((item.FileAccess & FileAccess.Write) != 0)
{
item.FileStream.Flush();
}
}
item.DecUse();
}
public StreamItem GetWriteStream(string strFilePath)
{
FileAccess access = FileAccess.Write;
StreamItem item = this.FindItem(strFilePath, access);
if (item != null)
{
item.Touch();
return(item);
}
return(NewItem(strFilePath, FileMode.OpenOrCreate, access));
}
public void ReturnStream(StreamItem item)
{
if (item.Fly)
{
if (item.FileStream != null)
{
item.FileStream.Close();
item.FileStream = null;
}
item.DecUse();
return;
}
if (item.FileStream != null)
{
item.FileStream.Flush();
}
item.DecUse();
}
public StreamItem NewItem(string strFilePath,
FileMode mode,
FileAccess access,
bool bAddToCollection = true)
{
// 防备尺寸过大
if (bAddToCollection && _items.Count > MAX_ITEMS)
{
ClearAll();
}
StreamItem item = new StreamItem
{
Fly = !bAddToCollection,
FileAccess = access
};
item.Touch();
item.FilePath = strFilePath;
item.FileStream = File.Open(
strFilePath,
mode, // FileMode.OpenOrCreate,
access, // FileAccess.Write,
FileShare.ReadWrite);
item.IncUse();
if (bAddToCollection)
{
m_lock.EnterWriteLock();
try
{
_items.Add(item);
}
finally
{
m_lock.ExitWriteLock();
}
}
Debug.Assert(item.FileStream != null, "");
return(item);
}
public StreamItem NewItem(string strFilePath,
FileMode mode,
FileAccess access,
bool bAddToCollection = true)
{
// 防备尺寸过大
if (bAddToCollection && _items.Count > MAX_ITEMS)
{
ClearAll(true);
}
StreamItem item = new StreamItem
{
Fly = !bAddToCollection,
FileAccess = access
};
item.Touch();
item.FilePath = strFilePath;
int nRedoCount = 0;
REDO:
try
{
item.FileStream = File.Open(
strFilePath,
mode, // FileMode.OpenOrCreate,
access, // FileAccess.Write,
FileShare.ReadWrite);
}
catch (DirectoryNotFoundException ex)
{
if ((item.FileAccess & FileAccess.Write) != 0 &&
nRedoCount == 0)
{
// 创建中间子目录
PathUtil.TryCreateDir(PathUtil.PathPart(strFilePath));
nRedoCount++;
goto REDO;
}
throw new Exception(ex.Message, ex);
}
item.IncUse();
if (bAddToCollection)
{
m_lock.EnterWriteLock();
try
{
_items.Add(item);
}
finally
{
m_lock.ExitWriteLock();
}
}
Debug.Assert(item.FileStream != null, "");
return(item);
}
