/// <summary>
/// Remove an entry with a given key. Notifies subscriber, if there is any,
/// of the removed item.
/// </summary>
/// <param name="key"></param>
/// <param name="regionName"></param>
/// <returns></returns>
public override object Remove(string key, string regionName = null)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
var cacheKey = new CacheKey(key);
CacheEntry cacheValue = null;
// remove the item, return if not found.
lock (_locker)
{
var mruEntry = MruManager.GetItem(cacheKey);
if (mruEntry == null)
{
return(null);
}
// get the Store's Current Key containing the TimeStamp!
cacheKey = (CacheKey)mruEntry.Key;
cacheValue = mruEntry.Value as CacheEntry;
MruManager.Remove(cacheKey);
}
// Notify the subscriber of the removed item.
if (CacheEntrySetRemovedCallback != null)
{
CacheEntrySetRemovedCallback(new[]
{
new CacheEntryRemovedArguments(this, CacheEntryRemovedReason.Removed, cacheValue.Convert(cacheKey))
});
}
return(cacheValue);
}
/// <summary>
/// Dispose the File Stream.
/// </summary>
public void Dispose()
{
_isDisposed = true;
if (_fileStream == null)
{
return;
}
if (!_unBuffered)
{
_fileStream.Dispose();
InUse = false;
_fileStream = null;
return;
}
MruManager.Remove(Id);
lock (_locker)
{
if (_fileStream == null)
{
return;
}
_fileStream.Dispose();
_fileStream = null;
InUse = false;
}
}
private void MaintainOpenedFileCount()
{
if (MruManager.Count <= MaxInstanceCount)
{
return;
}
while (MruManager.Count > MruManager.MinCapacity)
{
Mru.Generic.MruItem <int, FileStream> item = MruManager.PeekInTail();
if (item.Value.InUse)
{
return;
}
lock (item.Value._locker)
{
if (item.Value.InUse || item.Value._fileStream == null)
{
return;
}
MruManager.Remove(item.Value.Id);
//item.Value._streamPosition = item.Value._fileStream.Position;
item.Value._fileStream.Flush();
item.Value._fileStream.Close();
item.Value._fileStream = null;
}
}
}
/// <summary>
/// DocManager reports about successful/unsuccessful Open File operation
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void docManager_OpenEvent(object sender, OpenFileEventArgs e)
{
// Update MRU List
if (e.Succeeded)
{
mruManager.Add(e.FileName);
}
else
{
mruManager.Remove(e.FileName);
}
}
/// <summary>
/// Remove ObjectToRemove from the Collection if found, else throws an exception
/// </summary>
public void Remove(object item)
{
if (!Contains(item))
{
return;
}
Sop.DataBlock currBlock = this.GetCurrentDataBlock(true);
if (GetId(currBlock) >= 0)
{
MruManager.Remove(GetId(currBlock), true);
}
DataBlockDriver.Remove(this, currBlock);
}
public void Close()
{
if (_isDisposed || _fileStream == null)
{
return;
}
_fileStream.Close();
if (_unBuffered)
{
InUse = false;
MruManager.Remove(Id);
_fileStream = null;
}
}
//internal override bool RemoveInMemory(long DataAddress, Transaction.ITransactionLogger Transaction)
//{
// if (LastItem != null)
// LastItem.Clear();
// if (FirstItem != null)
// FirstItem.Clear();
// CurrentItem = null;
// base.RemoveInMemory(DataAddress, Transaction);
// return true;
//}
private void RemoveAt(long dataAddress, bool willMove)
{
if (willMove && !MoveTo(dataAddress))
{
return;
}
if (IsDeletedBlocksList && Count == 1)
{
return;
}
Sop.DataBlock currBlock = this.GetCurrentDataBlock(true);
if (FirstItem.DiskBuffer.DataAddress == dataAddress)
{
MoveFirst();
if (MoveNext())
{
FirstItem.DiskBuffer.DataAddress = CurrentItem.DiskBuffer.DataAddress;
CurrentItem.PreviousItemAddress = -1;
Sop.DataBlock db = WriteToBlock(CurrentItem, CurrentItem.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
}
else
{
long address = FirstItem.DiskBuffer.DataAddress;
FirstItem.DiskBuffer.DataAddress = LastItem.DiskBuffer.DataAddress = -1;
CurrentItem = FirstItem;
Sop.DataBlock db = WriteToBlock(CurrentItem, CurrentItem.DiskBuffer);
db.DataAddress = address;
DataBlockDriver.SetDiskBlock(this, db, false);
db.DataAddress = -1;
}
}
else if (LastItem.DiskBuffer.DataAddress == dataAddress)
{
if (MovePrevious() || FirstItem.DiskBuffer.DataAddress == CurrentItem.DiskBuffer.DataAddress)
{
LastItem.DiskBuffer.DataAddress = CurrentItem.DiskBuffer.DataAddress;
CurrentItem.NextItemAddress = -1;
Sop.DataBlock db = WriteToBlock(CurrentItem, CurrentItem.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
}
else
{
throw new InvalidOperationException("Can't go previous but First is not the only item.");
}
}
else
{
LinkedItemOnDisk curr = CurrentItem;
LinkedItemOnDisk prev = null, next = null;
if (MoveTo(curr.PreviousItemAddress))
{
prev = CurrentItem;
}
if (MoveTo(curr.NextItemAddress))
{
next = CurrentItem;
}
if (prev != null && next != null)
{
prev.NextItemAddress = curr.NextItemAddress;
next.PreviousItemAddress = curr.PreviousItemAddress;
Sop.DataBlock db = WriteToBlock(prev, prev.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
db = WriteToBlock(next, next.DiskBuffer);
DataBlockDriver.SetDiskBlock(this, db, false);
}
}
if (MruManager.Count > 0)
{
MruManager.Remove(dataAddress, true);
}
DataBlockDriver.Remove(this, currBlock);
}
/// <summary>
/// Initialize helper objects from the DocToolkit Library.
///
/// Called from Form1_Load. Initialized all objects except
/// PersistWindowState wich must be initialized in the
/// form constructor.
/// </summary>
private void InitializeHelperObjects()
{
// DocManager
DocManagerData data = new DocManagerData();
data.FormOwner = this;
data.UpdateTitle = true;
data.FileDialogFilter = "DrawTools files (*.dtl)|*.dtl|All Files (*.*)|*.*";
data.NewDocName = "Untitled.dtl";
data.RegistryPath = registryPath;
docManager = new DocManager(data);
docManager.RegisterFileType("dtl", "dtlfile", "DrawTools File");
// Subscribe to DocManager events.
docManager.SaveEvent += docManager_SaveEvent;
docManager.LoadEvent += docManager_LoadEvent;
// Make "inline subscription" using anonymous methods.
docManager.OpenEvent += delegate(object sender, OpenFileEventArgs e)
{
// Update MRU List
if (e.Succeeded)
{
mruManager.Add(e.FileName);
}
else
{
mruManager.Remove(e.FileName);
}
};
docManager.DocChangedEvent += delegate(object o, EventArgs e)
{
drawArea.Refresh();
drawArea.ClearHistory();
};
docManager.ClearEvent += delegate(object o, EventArgs e)
{
if (drawArea.GraphicsList != null)
{
drawArea.GraphicsList.Clear();
drawArea.ClearHistory();
drawArea.Refresh();
}
};
docManager.NewDocument();
// DragDropManager
dragDropManager = new DragDropManager(this);
dragDropManager.FileDroppedEvent += delegate(object sender, FileDroppedEventArgs e)
{
OpenDocument(e.FileArray.GetValue(0).ToString());
};
// MruManager
mruManager = new MruManager();
mruManager.Initialize(
this, // owner form
recentFilesToolStripMenuItem, // Recent Files menu item
fileToolStripMenuItem, // parent
registryPath); // Registry path to keep MRU list
mruManager.MruOpenEvent += delegate(object sender, MruFileOpenEventArgs e)
{
OpenDocument(e.FileName);
};
}
private static void MaintainOpenedFileCount(bool closeAll = false)
{
if (MruManager.Count <= MaxInstanceCount)
{
return;
}
lock (MruManager)
{
int ctr = 0;
while (closeAll || MruManager.Count > MruManager.MinCapacity)
{
if (ctr++ >= MruManager.MaxCapacity - 10)
{
Log.Logger.Instance.Verbose("MaintainOpenedFileCount FileStream trimming loop reached {0}, ending trimming...", ctr);
break;
}
Mru.Generic.MruItem <int, FileStream> item = MruManager.PeekInTail();
//if (item.Value.InUse) return;
lock (item.Value._locker)
{
if (MruManager.Count <= MruManager.MinCapacity)
{
if (item.Value._fileStream == null)
{
MruManager.Remove(item.Value.Id);
return;
}
if (item.Value.InUse)
{
return;
}
}
if (item.Value.InUse)
{
item.Value.InUse = true;
continue;
}
//item.Value._streamPosition = item.Value._fileStream.Position;
if (item.Value._fileStream != null || !item.Value._isDisposed)
{
item.Value.InUse = true;
if (item.Value._fileStream != null || !item.Value._isDisposed)
{
try
{
item.Value._fileStream.Flush();
if (item.Value._fileStream != null)
{
item.Value._fileStream.Close();
}
}
catch { }
}
item.Value._fileStream = null;
MruManager.Remove(item.Value.Id);
item.Value.InUse = false;
}
else
{
MruManager.Remove(item.Value.Id);
}
}
}
}
}
