byte _version; // this is used to keep track of removals. // TODO: describe the algorithm
#endregion Fields
#region Constructors
/// <summary>
/// Creates an instance of a watcher
/// </summary>
/// <param name="rootDirectory">The directory to watch. It does not support UNC paths (yet).</param>
/// <param name="pollingIntervalInMilliseconds">Polling interval</param>
public PollingWatcher(string rootDirectory, bool includeSubdirectories = false, int pollingIntervalInMilliseconds = 1000)
{
Tracing = new TraceSource("PollingWatcher");
_state = new PathToFileStateHashtable(Tracing);
_pollingIntervalInMilliseconds = pollingIntervalInMilliseconds;
_includeSubdirectories = includeSubdirectories;
_directories.Add(ToDirectoryFormat(rootDirectory));
}
byte _version; // this is used to keep track of removals. // TODO: describe the algorithm
/// <summary>
/// Creates an instance of a watcher
/// </summary>
/// <param name="rootDirectory">The directory to watch. It does not support UNC paths (yet).</param>
/// <param name="includeSubdirectories">A bool controlling whether or not subdirectories will be watched too</param>
/// <param name="pollingIntervalInMilliseconds">Polling interval</param>
public PollingWatcher(string rootDirectory, bool includeSubdirectories = false, int pollingIntervalInMilliseconds = 1000)
{
Tracing = new TraceSource("PollingWatcher");
_state = new PathToFileStateHashtable(Tracing);
_pollingIntervalInMilliseconds = pollingIntervalInMilliseconds;
_includeSubdirectories = includeSubdirectories;
_directories.Add(ToDirectoryFormat(rootDirectory));
}
/// <summary>
/// Creates an instance of a watcher
/// </summary>
/// <param name="path">The path to watch.</param>
/// <param name="filter">The type of files to watch. For example, "*.txt" watches for changes to all text files.</param>
public PollingFileSystemWatcher(string path, string filter = "*.*", EnumerationOptions options = null)
{
if (!Directory.Exists(path))
{
throw new ArgumentException("Path not found.", nameof(path));
}
_state = new PathToFileStateHashtable();
Path = path;
Filter = filter;
EnumerationOptions = null ?? new EnumerationOptions();
_timer = new Timer(new TimerCallback(TimerHandler));
}
private void Resize()
{
// this is because sometimes we just need to garbade collect instead of increase size
var newSize = Math.Max(_count * 2, 4);
var bigger = new PathToFileStateHashtable(newSize);
foreach (var existingValue in this)
{
bigger.Add(existingValue.Directory, existingValue.Path, existingValue);
}
Values = bigger.Values;
Buckets = bigger.Buckets;
this._nextValuesIndex = bigger._nextValuesIndex;
this._count = bigger._count;
}
private void Resize()
{
// this is because sometimes we just need to garbade collect instead of increase size
var newSize = Math.Max(_count * 2, 4);
if (_trace.Switch.ShouldTrace(TraceEventType.Verbose))
{
_trace.TraceEvent(TraceEventType.Verbose, 5, "Resizing hashtable from {0} to {1}", Values.Length, newSize);
}
var bigger = new PathToFileStateHashtable(_trace, newSize);
foreach (var existingValue in this)
{
bigger.Add(existingValue.Directory, existingValue.Path, existingValue);
}
Values = bigger.Values;
Buckets = bigger.Buckets;
this._nextValuesIndex = bigger._nextValuesIndex;
this._count = bigger._count;
}
public Enumerator(PathToFileStateHashtable table)
{
_table = table;
_index = 0;
}
public Enumerator(PathToFileStateHashtable table)
{
_table = table;
_index = 0;
}
private void Resize()
{
// this is because sometimes we just need to garbade collect instead of increase size
var newSize = Math.Max(_count * 2, 4);
if (_trace.Switch.ShouldTrace(TraceEventType.Verbose))
{
_trace.TraceEvent(TraceEventType.Verbose, 5, "Resizing hashtable from {0} to {1}", Values.Length, newSize);
}
var bigger = new PathToFileStateHashtable(_trace, newSize);
foreach (var existingValue in this)
{
bigger.Add(existingValue.Directory, existingValue.Path, existingValue);
}
Values = bigger.Values;
Buckets = bigger.Buckets;
this._nextValuesIndex = bigger._nextValuesIndex;
this._count = bigger._count;
}
