protected override void Main()
{
TraceLine(Instructions.PressAnyKeyToCancel);
string path = Environment.ExpandEnvironmentVariables(@"%systemdrive%\");
using (var watcher = new FileSystemWatcher(path))
{
watcher.InternalBufferSize = 0; // Not recommended; used here for testing only.
watcher.IncludeSubdirectories = true;
watcher.NotifyFilter =
NotifyFilters.FileName
| NotifyFilters.DirectoryName
| NotifyFilters.Size
| NotifyFilters.CreationTime
| NotifyFilters.LastWrite
| NotifyFilters.LastAccess
| NotifyFilters.Attributes
| NotifyFilters.Security;
using (watcher
.Watch(WatcherChangeTypes.All)
.Subscribe(ConsoleOutput()))
{
WaitForKey();
}
}
}
internal static ReadOnlyListSubject <TResult> CollectInternal <TResult>(
this FileSystemWatcher watcher,
bool composited,
Func <IObservable <CollectionNotification <string> >, IObservable <CollectionModification <TResult> > > selector,
IScheduler scheduler)
{
Contract.Requires(watcher != null);
Contract.Requires(selector != null);
Contract.Requires(scheduler != null);
Contract.Ensures(Contract.Result <ReadOnlyListSubject <TResult> >() != null);
var existing = Directory
.EnumerateFiles(
watcher.Path,
watcher.Filter,
watcher.IncludeSubdirectories ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly);
var changes = watcher
.Watch(WatcherChangeTypes.Created | WatcherChangeTypes.Deleted | WatcherChangeTypes.Renamed)
.SelectMany(notification => notification.Change == WatcherChangeTypes.Created
? Observable.Return(CollectionModification.CreateAdd(notification.FullPath))
: notification.Change == WatcherChangeTypes.Deleted
? Observable.Return(CollectionModification.CreateRemove(notification.FullPath))
: Observable.Return(CollectionModification.CreateRemove(notification.OldFullPath)).Concat(Observable.Return(CollectionModification.CreateAdd(notification.FullPath))));
if (composited)
{
changes = changes.Finally(watcher.Dispose);
}
return(existing.ToObservable(scheduler).Collect(changes.ObserveOn(scheduler), selector, StringComparer.OrdinalIgnoreCase));
}