/// <summary>
/// Ensures the queued workers are stopped and disposed.
/// </summary>
public void Dispose()
{
if (!isDisposed)
{
if (watcher != null)
{
watcher.EnableRaisingEvents = false;
watcher.Dispose();
watcher = null;
}
if (queue != null)
{
queue.Dispose();
queue = null;
}
if (worker != null)
{
if (worker.IsBusy)
{
worker.CancelAsync();
}
worker.Dispose();
worker = null;
}
if (catalog != null)
{
catalog.Dispose();
catalog = null;
}
if (actives != null)
{
actives.Clear();
actives = null;
}
if (disabled != null)
{
disabled.Clear();
disabled = null;
}
if (cleansed != null)
{
cleansed.Clear();
cleansed = null;
}
controller = null;
isDisposed = true;
GC.SuppressFinalize(this);
}
}
private SafeCollection <IScanner> actives; // all queued or running scanners
//========================================================================================
// Constructors
//========================================================================================
/// <summary>
/// Private singleton constructor.
/// </summary>
private Librarian(Controller controller)
{
this.controller = controller;
this.queue = new BlockingQueue <IScanner>();
this.actives = new SafeCollection <IScanner>();
this.cleansed = new StringCollection();
this.disabled = new StringCollection();
this.scanner = null;
this.sync = new Object();
// temporarily reference an empty catalog
this.catalog = new TerseCatalog();
this.worker = new BackgroundWorker();
this.worker.DoWork += new DoWorkEventHandler(DoWork);
this.worker.ProgressChanged += new ProgressChangedEventHandler(DoProgressChanged);
this.worker.WorkerReportsProgress = true;
this.worker.WorkerSupportsCancellation = true;
this.worker.RunWorkerAsync();
AddScanner(new InitializingScanner(controller, this), InitializingScannerPriority);
}