public Task StartAsync(CancellationToken cancellationToken)
{
_poll = _folderSource.CreateFileWatcher(_fileWatcherType, OnFileWatcher, nextItem: null, pollIntervalInSeconds: _pollIntervalInSeconds > 0 ? _pollIntervalInSeconds : DefaultPollIntervalInSeconds);
if (_poll == null)
{
var errorText = string.Format("Path '{0}' is invalid. IFolderItem.RootPath must be set to a valid directory location.", _folderSource.Path);
_trace.Error(errorText);
throw new InvalidOperationException(errorText);
}
// TODO: need to decide what to do when _poll is null i.e. trigger folder does not exist.
return(Task.FromResult(0));
}
private static async Task FileWatchTestsAsync(IFolderItem folder)
{
bool fileAddedTrigger = false;
bool fileUpdatedTrigger = false;
var poll = folder.CreateFileWatcher(FileWatcherType.Created,
(fr, obj) =>
{
Console.WriteLine("File {0} was added.", fr.Path);
var uri = obj as Uri;
if (uri != null)
{
Console.WriteLine("Next Uri: {0}", uri.AbsolutePath);
}
fileAddedTrigger = true;
return(Task.FromResult(0));
}, null, 1);
var poll2 = folder.CreateFileWatcher(FileWatcherType.Updated,
(fr, obj) =>
{
Console.WriteLine("File {0} was updated.", fr.Path);
var uri = obj as Uri;
if (uri != null)
{
Console.WriteLine("Next Uri: {0}", uri.AbsolutePath);
}
fileUpdatedTrigger = true;
return(Task.FromResult(0));
}, null, 1);
var newFile = folder.GetFileReference(Guid.NewGuid().ToString());
await newFile.WriteAsync(new byte[0]);
// Adding some wait to make sure triggers are fired.
await Task.Delay(1000);
await newFile.WriteAsync(new byte[1] {
0
});
// Adding some wait to make sure triggers are fired.
Console.WriteLine("Waiting for 20 seconds...");
await Task.Delay(20000);
if (!fileAddedTrigger)
{
Console.WriteLine("Error: New file was not triggered when a new file was added.");
}
if (!fileUpdatedTrigger)
{
Console.WriteLine("Error: Update file was not triggered when an existing file was updated.");
}
var trigger = await folder.CheckForFileAsync(FileWatcherType.Updated);
await newFile.WriteAsync(new byte[1] {
1
});
trigger = await folder.CheckForFileAsync(FileWatcherType.Updated, trigger.NextUri);
if (trigger.FileItem != null)
{
Console.WriteLine("Updated file: {0}", trigger.FileItem.Path);
}
await newFile.DeleteAsync();
}