public FileWatchInfo Subscribe(string path, bool includeSubDirectories, FileEventHandler eventHandler,
IEnumerable <string> filter, IEnumerable <FileWatchChangeType> changeTypes)
{
var id = GetFirstFreeId();
var fileWatcherInfo = new FileWatcherInfo(id, path, includeSubDirectories, eventHandler,
filter, changeTypes);
return(Subscribe(fileWatcherInfo));
}
/// <summary>
/// Adds a new <see cref="FileWatcherInfo"/> to the current <see cref="FileWatcher"/>.
/// The <see cref="FileEventHandler"/> in the specified <see cref="fileWatcherInfo"/> will be called on a change in the current watch.
/// </summary>
/// <exception cref="InvalidFileWatchInfoException">
/// The given <see cref="fileWatcherInfo"/> contains a different path than the one being watched.
/// </exception>
/// <param name="fileWatcherInfo">The <see cref="fileWatcherInfo"/> to add.</param>
public void AddSubscription(FileWatcherInfo fileWatcherInfo)
{
if (!_watchedPath.IsEquivalentPath(fileWatcherInfo.Path))
{
throw new InvalidFileWatchInfoException("The specified path does not equal the watched path.");
}
if (!_subscriptions.TryAdd(fileWatcherInfo, DateTime.Now))
{
return; // The given subscription already exists
}
if (fileWatcherInfo.EventHandler == null)
{
return; // No event to call
}
var eventArgs = new FileWatchEventArgs(_watching
? FileWatchChangeType.Enabled
: FileWatchChangeType.Disabled,
fileWatcherInfo.Path);
RaiseEvent(new EventData(fileWatcherInfo, eventArgs));
}
// ToDo: subscribe to parent path if available and adjust filter
// eg if D:\ is watched, D:\TEMP can be added there
// Set a SubscribedPath property for FileWatcherInfo.
// Also change the way FileWatcherInfo applies filters! Must inspect the path!
private FileWatcherInfo Subscribe(FileWatcherInfo fileWatcherInfo)
{
lock (_watchers)
{
bool foundValidWatcher = false; // Indicates whether we found a useful FileWatcher during the foreach.
foreach (var item in _watchers)
{
// Does the current FileWatcher watch the specified path?
if (item.Key == fileWatcherInfo.Path)
{
foundValidWatcher = !item.Value.IsDisposed;
if (foundValidWatcher)
{
// The watcher is not disposed, add a subscription.
_watchers[fileWatcherInfo.Path].AddSubscription(fileWatcherInfo);
}
else
{
// No need to keep this disposed watcher referenced.
_watchers.Remove(item);
}
break;
}
}
if (!foundValidWatcher)
{
// Existing non-disposed watcher is not found, create a new one.
var watcher = new FileWatcher(fileWatcherInfo.Path);
_watchers.Add(fileWatcherInfo.Path, watcher);
watcher.Disposed += FileWatcher_Disposed;
watcher.Watching = true;
watcher.AddSubscription(fileWatcherInfo);
}
}
return(fileWatcherInfo);
}
/// <summary>
/// Adds a new <see cref="FileWatcherInfo"/> to the current <see cref="FileWatcher"/>.
/// The <see cref="FileEventHandler"/> in the specified <see cref="fileWatcherInfo"/> will be called on a change in the current watch.
/// </summary>
/// <exception cref="InvalidFileWatchInfoException">
/// The given <see cref="fileWatcherInfo"/> contains a different path than the one being watched.
/// </exception>
/// <param name="fileWatcherInfo">The <see cref="fileWatcherInfo"/> to add.</param>
public void AddSubscription(FileWatcherInfo fileWatcherInfo)
{
if (fileWatcherInfo.Path != _watchedPath.Path.FullName)
{
throw new InvalidFileWatchInfoException("The specified path does not equal the watched path.");
}
lock (_subscriptions)
{
if (_subscriptions.Contains(fileWatcherInfo))
{
return; // The given subscription already exists
}
_subscriptions.Add(fileWatcherInfo);
if (fileWatcherInfo.EventHandler == null)
{
return; // No event to call
}
var eventArgs = new FileWatchEventArgs(_watching
? FileWatchChangeType.Enabled
: FileWatchChangeType.Disabled,
fileWatcherInfo.Path);
RaiseEvent(new EventData(fileWatcherInfo, eventArgs));
}
}
/// <summary>
/// Removes the given FileWatcherInfo from the current watch.
/// The eventhandler won't be called anymore on a change in the current watch.
/// </summary>
/// <param name="fileWatcherInfo">The FileWatcherInfo to remove.</param>
/// <returns>True if the FileWatcherInfo is found and removed.</returns>
public bool RemoveSubscription(FileWatcherInfo fileWatcherInfo)
{
lock (_subscriptions)
return(_subscriptions.Remove(fileWatcherInfo));
}
/// <summary>
/// Removes the given FileWatcherInfo from the current watch.
/// The eventhandler won't be called anymore on a change in the current watch.
/// </summary>
/// <param name="fileWatcherInfo">The FileWatcherInfo to remove.</param>
/// <returns>True if the FileWatcherInfo is found and removed.</returns>
public bool RemoveSubscription(FileWatcherInfo fileWatcherInfo)
{
lock (_subscriptions)
return _subscriptions.Remove(fileWatcherInfo);
}
/// <summary>
/// Adds a new <see cref="FileWatcherInfo"/> to the current <see cref="FileWatcher"/>.
/// The <see cref="FileEventHandler"/> in the specified <see cref="fileWatcherInfo"/> will be called on a change in the current watch.
/// </summary>
/// <exception cref="InvalidFileWatchInfoException">
/// The given <see cref="fileWatcherInfo"/> contains a different path than the one being watched.
/// </exception>
/// <param name="fileWatcherInfo">The <see cref="fileWatcherInfo"/> to add.</param>
public void AddSubscription(FileWatcherInfo fileWatcherInfo)
{
if (fileWatcherInfo.Path != _watchedPath.Path.FullName)
throw new InvalidFileWatchInfoException("The specified path does not equal the watched path.");
lock (_subscriptions)
{
if (_subscriptions.Contains(fileWatcherInfo))
return; // The given subscription already exists
_subscriptions.Add(fileWatcherInfo);
if (fileWatcherInfo.EventHandler == null)
return; // No event to call
var eventArgs = new FileWatchEventArgs(_watching
? FileWatchChangeType.Enabled
: FileWatchChangeType.Disabled,
fileWatcherInfo.Path);
RaiseEvent(new EventData(fileWatcherInfo, eventArgs));
}
}
public FileWatchInfo Subscribe(string path, bool includeSubDirectories, FileEventHandler eventHandler,
IEnumerable<string> filter, IEnumerable<FileWatchChangeType> changeTypes)
{
var id = GetFirstFreeId();
var fileWatcherInfo = new FileWatcherInfo(id, path, includeSubDirectories, eventHandler,
filter, changeTypes);
return Subscribe(fileWatcherInfo);
}
// ToDo: subscribe to parent path if available and adjust filter
// eg if D:\ is watched, D:\TEMP can be added there
// Set a SubscribedPath property for FileWatcherInfo.
// Also change the way FileWatcherInfo applies filters! Must inspect the path!
private FileWatcherInfo Subscribe(FileWatcherInfo fileWatcherInfo)
{
lock (_watchers)
{
bool foundValidWatcher = false; // Indicates whether we found a useful FileWatcher during the foreach.
foreach (var item in _watchers)
{
// Does the current FileWatcher watch the specified path?
if (item.Key == fileWatcherInfo.Path)
{
foundValidWatcher = !item.Value.IsDisposed;
if (foundValidWatcher)
// The watcher is not disposed, add a subscription.
_watchers[fileWatcherInfo.Path].AddSubscription(fileWatcherInfo);
else
// No need to keep this disposed watcher referenced.
_watchers.Remove(item);
break;
}
}
if (!foundValidWatcher)
{
// Existing non-disposed watcher is not found, create a new one.
var watcher = new FileWatcher(fileWatcherInfo.Path);
_watchers.Add(fileWatcherInfo.Path, watcher);
watcher.Disposed += FileWatcher_Disposed;
watcher.Watching = true;
watcher.AddSubscription(fileWatcherInfo);
}
}
return fileWatcherInfo;
}
/// <summary>
/// Removes the given FileWatcherInfo from the current watch.
/// The eventhandler won't be called anymore on a change in the current watch.
/// </summary>
/// <param name="fileWatcherInfo">The FileWatcherInfo to remove.</param>
/// <returns>True if the FileWatcherInfo is found and removed.</returns>
public bool RemoveSubscription(FileWatcherInfo fileWatcherInfo)
{
return(_subscriptions.TryRemove(fileWatcherInfo, out _));
}
