private async Task SubscribeToAll()
{
var checkpoint = checkpointProvider.Get();
var position = checkpoint.HasValue ? new Position(checkpoint.Value, checkpoint.Value) : Position.Start;
subscription = await client.SubscribeToAllAsync(position, OnEvent, subscriptionDropped : OnSubscriptionDropped);
}
private async static Task EventArrived(
StreamSubscription subscription,
ResolvedEvent resolvedEvent,
CancellationToken cancellationToken)
{
var jsonData = Encoding.UTF8.GetString(resolvedEvent.Event.Data.ToArray());
var packages = JsonConvert.DeserializeObject <List <Package> >(jsonData);
int i = 1;
foreach (var package in packages)
{
Console.WriteLine();
Console.WriteLine($"{i}.");
Console.WriteLine($"Package (number: {package.Number}) has been delivered");
Console.WriteLine($"Sender's e-mail: {package.Sender.Email}");
Console.WriteLine($"Receiver's name: {package.Receiver.Name} {package.Receiver.Surname}");
Console.WriteLine($"Receiver's e-mail: {package.Receiver.Email}");
Console.WriteLine($"Receiver's address:");
Console.WriteLine($"{package.Receiver.Address.Street} {package.Receiver.Address.HouseNumber}" + "\n" +
$"{package.Receiver.Address.PostCode} {package.Receiver.Address.City}" + "\n" +
$"{package.Receiver.Address.Country}");
i++;
}
SendNotificationEmails(packages);
}
private Task HandleNewEvent(StreamSubscription subscription, ResolvedEvent evnt, CancellationToken token)
{
if (evnt.Event.EventStreamId.StartsWith('$'))
{
// skip system events
return(Task.CompletedTask);
}
IDomainEvent <IDomainEventData> @event;
try
{
@event = ParseEvent(evnt);
}
catch
{
// TODO: Properly handle this case
_logger.LogWarning("Unknown event name: {eventName}", evnt.Event.EventType);
return(Task.CompletedTask);
}
_logger.LogDebug("Processed event {position}|{type}.", evnt.OriginalPosition, evnt.Event.EventType);
_sender.SendEvent(@event);
return(Task.CompletedTask);
}
Future <string> join(string separator = "")
{
_Future result = new _Future();
StringBuilder buffer = new StringBuilder();
StreamSubscription <T> subscription = null;
bool first = true;
subscription = listen(
(T element) => {
if (!first)
{
buffer.Append(separator);
}
first = false;
try {
buffer.Append(element);
}
catch (Exception e) {
_stream._cancelAndErrorWithReplacement(subscription, result, e);
}
},
onError: (e, _) => result._completeError((Exception)e),
onDone: () => { result._complete(buffer.ToString()); },
cancelOnError: true);
return(result.to <string>());
}
private async Task HandleEvent(StreamSubscription subscription, ResolvedEvent resolvedEvent,
CancellationToken cancellationToken)
{
var domainEvent = _eventSerializer.Deserialize(resolvedEvent);
if (domainEvent == null)
{
return;
}
_logger.LogInformation($"PullRequestCommentsProjector handled event: {domainEvent}");
switch (domainEvent)
{
case SingleCommentWasAdded added:
var comment = new PullRequestComment
{
PullRequestId = added.PullRequestId,
CommentId = added.CommentId,
PostedAt = added.OccurredAt,
Author = added.Author,
Text = added.Text
};
await _repository.Save(comment);
break;
}
}
public ListviewStreamSubscription(StreamSubscription streamSubscription)
{
this._streamSubscription = streamSubscription;
this.Text = streamSubscription.Name;
this.SubItems.Add(streamSubscription.Provider);
this.SubItems.Add(streamSubscription.Slug);
}
async Task HandleEvent(StreamSubscription streamSubscription, ResolvedEvent resolvedEvent, CancellationToken cancellationToken)
{
if (resolvedEvent.Event.EventType.StartsWith("$"))
{
return;
}
var evt = resolvedEvent.Deserialize();
if (evt == null)
{
return;
}
using (var scope = _serviceProvider.CreateScope())
{
var publisher = scope.ServiceProvider.GetRequiredService <IPublisher>();
var domainProjectionType = typeof(DomainEventProjection <>).MakeGenericType(evt.GetType());
var domainProjection = Activator.CreateInstance(domainProjectionType, evt) ??
throw new Exception($"Unable to create domain event projection for event {evt.GetType()}");
await publisher.Publish(domainProjection, cancellationToken);
_checkpoint.UpdatePosition(resolvedEvent.Event.Position.CommitPosition);
await scope.ServiceProvider.GetRequiredService <ICheckpointProvider>()
.StoreCheckpoint(_checkpoint, cancellationToken);
}
}
/// <summary>
/// Formats a notification string with the necessary parameters
/// </summary>
/// <param name="stream"></param>
/// <param name="message"></param>
/// <returns></returns>
public static string GetNotificationMessage(ILiveBotStream stream, StreamSubscription subscription, ILiveBotUser user = null, ILiveBotGame game = null)
{
string RoleMention = "";
if (subscription.DiscordRole != null)
{
if (subscription.DiscordRole.Name == "@everyone")
{
RoleMention = "@everyone";
}
else
{
RoleMention = MentionUtils.MentionRole(subscription.DiscordRole.DiscordId);
}
}
var tempUser = user ?? stream.User;
var tempGame = game ?? stream.Game;
return(subscription.Message
.Replace("{Name}", EscapeSpecialDiscordCharacters(tempUser.DisplayName), ignoreCase: true, culture: CultureInfo.CurrentCulture)
.Replace("{Username}", EscapeSpecialDiscordCharacters(tempUser.DisplayName), ignoreCase: true, culture: CultureInfo.CurrentCulture)
.Replace("{Game}", EscapeSpecialDiscordCharacters(tempGame.Name), ignoreCase: true, culture: CultureInfo.CurrentCulture)
.Replace("{Title}", EscapeSpecialDiscordCharacters(stream.Title), ignoreCase: true, culture: CultureInfo.CurrentCulture)
.Replace("{URL}", stream.StreamURL ?? "", ignoreCase: true, culture: CultureInfo.CurrentCulture)
.Replace("{Role}", RoleMention, ignoreCase: true, culture: CultureInfo.CurrentCulture)
.Trim());
}
public async Task <string> ChangeSubscription(int id)
{
if (id == null)
{
return("error");
//return NotFound();
}
StreamSubscription sub = _context.StreamSubscriptions.Where(ss => ss.ID == id).FirstOrDefault();
DateTime start = DateTime.Now;
string @return = "error";
if (sub != null)
{
switch (sub.Subscribed)
{
case SubscriptionState.Subscribed:
sub.Subscribed = SubscriptionState.Unsubscribed;
@return = "false";
break;
case SubscriptionState.Unsubscribed:
sub.Subscribed = SubscriptionState.Subscribed;
@return = "true";
break;
}
await _context.SaveChangesAsync();
}
return(@return);
//return RedirectToAction(nameof(Subscriptions));
}
protected async Task Handler(StreamSubscription sub, ResolvedEvent re, CancellationToken cancellationToken) {
_debugLog?.Invoke(
"Subscription {Subscription} got an event {@Event}",
sub.SubscriptionId,
re
);
_lastProcessedPosition = GetPosition(re);
if (re.Event.EventType.StartsWith("$")) {
await Store();
}
try {
var evt = _eventSerializer.Deserialize(re.Event.Data.Span, re.Event.EventType);
if (evt != null) {
_debugLog?.Invoke("Handling event {Event}", evt);
await Task.WhenAll(
_projections.Select(
x => x.HandleEvent(evt, (long?) re.OriginalPosition?.CommitPosition)
)
);
}
}
catch (Exception e) {
_log.LogWarning(e, "Error when handling the event {Event}", re.Event.EventType);
}
await Store();
Task Store() => StoreCheckpoint(GetPosition(re), cancellationToken);
}
private async Task EventAppeared(StreamSubscription subscription, ResolvedEvent resolvedEvent, CancellationToken cancellationToken)
{
_logger.LogInformation("{eventType}@{preparePosition}", resolvedEvent.Event.EventType, resolvedEvent.Event.Position.PreparePosition);
var e = EventSerializer.Deserialize(resolvedEvent);
await ExecuteProjectionHandlers(e);
}
private void SubscriptionDropped(StreamSubscription _, SubscriptionDroppedReason reason, Exception ex)
{
if (ex == null)
{
return;
}
_completed.TrySetException(ex);
}
void _unsubscribe()
{
if (_subscription != null)
{
_subscription.cancel();
_subscription = null;
}
}
internal _ForwardingStreamSubscription(_ForwardingStream <S, T> _stream,
Action <T> onData, Action <object, string> onError, Action onDone, bool cancelOnError
)
: base(onData, onError, onDone, cancelOnError)
{
this._stream = _stream;
_subscription = _stream._source
.listen(_handleData, onError: _handleError, onDone: _handleDone);
}
void _handleDone()
{
try {
_subscription = null;
_transformerSink.close();
}
catch (Exception e) {
_addError(e, e.StackTrace);
}
}
void HandleDrop(StreamSubscription subscription, SubscriptionDroppedReason reason, Exception?exception)
{
if (reason == SubscriptionDroppedReason.Disposed)
{
return;
}
_started = false;
Task.Run(Start);
}
/// <summary>
/// Removes the specified stream from the cache.
/// </summary>
/// <param name="streamId">The stream identifier.</param>
/// <returns>The <see cref="Task"/></returns>
public static async Task UnregisterStream(string streamId)
{
if (subscriptions.ContainsKey(streamId))
{
StreamSubscription subscription = null;
while (!subscriptions.TryRemove(streamId, out subscription))
{
await Task.Delay(1);
}
}
}
/// <summary>
/// Unsubscribes from a topic.
/// </summary>
/// <param name="streamId">The stream identifier.</param>
/// <param name="topic">The topic.</param>
public static void UnsubscribeFromTopic(string streamId, string topic)
{
if (!string.IsNullOrEmpty(topic) && subscriptions.ContainsKey(streamId))
{
StreamSubscription subscriptionStream = subscriptions[streamId];
if (subscriptionStream.Topics.Contains(topic))
{
subscriptionStream.Topics.Remove(topic);
}
}
}
/// <summary>
/// Start the subscription to EventStoreDB
/// </summary>
/// <param name="cancellationToken"></param>
public async Task Start(CancellationToken cancellationToken)
{
var filter = new SubscriptionFilterOptions(EventTypeFilter.ExcludeSystemEvents());
_subscription = await _client.SubscribeToAllAsync(Position.Start,
EventAppeared,
subscriptionDropped : SubscriptionDropped,
filterOptions : filter,
resolveLinkTos : true,
cancellationToken : cancellationToken);
}
public Future forEach(Action <T> action)
{
_Future future = new _Future();
StreamSubscription <T> subscription = null;
subscription = listen(
(T element) => {
// TODO(floitsch): the type should be 'void' and inferred.
_stream._runUserCode <object>(() => {
action(element);
return(default);
internal _SinkTransformerStreamSubscription(Stream <S> source, _async._SinkMapper <S, T> mapper,
Action <T> onData, Action <object, string> onError, Action onDone, bool cancelOnError)
// We set the adapter's target only when the user is allowed to send data.
: base(onData, onError, onDone, cancelOnError)
{
_EventSinkWrapper <T> eventSink = new _EventSinkWrapper <T>(this);
_transformerSink = mapper(eventSink);
_subscription =
source.listen(_handleData, onError: _handleError, onDone: _handleDone);
}
private async static Task EventArrived(
StreamSubscription subscription,
ResolvedEvent resolvedEvent,
CancellationToken cancellationToken)
{
var jsonData = Encoding.UTF8.GetString(resolvedEvent.Event.Data.ToArray());
var book = JsonConvert.DeserializeObject <Book>(jsonData);
Console.WriteLine(jsonData);
}
private async static Task EventArrived(
StreamSubscription subscription,
ResolvedEvent resolvedEvent,
CancellationToken cancellationToken)
{
var jsonData = Encoding.UTF8.GetString(resolvedEvent.Event.Data.ToArray());
var packageData = JsonConvert.DeserializeObject <PackageData>(jsonData);
SendEmail(packageData);
}
public override StreamSubscription <T> listen(Action <T> onData,
Action <object, string> onError = null, Action onDone = null, bool cancelOnError = false)
{
//cancelOnError = cancelOnError;
StreamSubscription <T> result = _onListen(_stream, cancelOnError);
result.onData(onData);
result.onError(onError);
result.onDone(onDone);
return(result);
}
protected override Future _onCancel()
{
if (_isSubscribed)
{
StreamSubscription <S> subscription = _subscription;
_subscription = null;
return(subscription.cancel());
}
return(null);
}
async Task EventAppeared(StreamSubscription _, ResolvedEvent resolvedEvent, CancellationToken c)
{
if (resolvedEvent.Event.EventType.StartsWith("$"))
{
return;
}
var @event = resolvedEvent.Deserialize() !;
await Task.WhenAll(
_subscriptions.Select(x => x.Project(@event))
);
}
async Task Subscribe()
{
var room = system.StreamOf <ChatRoomMessage>("sms", RoomName);
subscription = await room.Subscribe((message, _) =>
{
if (message.User != UserName)
{
Console.WriteLine(message.Text);
}
});
}
// ------------------------------------------------------------------
// Stream interface.
public override StreamSubscription <T> listen(
Action <T> onData, Action <object, string> onError = null, Action onDone = null, bool cancelOnError = false)
{
// void onData(T data),
// {Function onError, void onDone(), bool cancelOnError}) {
cancelOnError = Equals(true, cancelOnError);
StreamSubscription <T> subscription =
_createSubscription(onData, onError, onDone, cancelOnError);
_onListen(subscription);
return(subscription);
}
async Task Subscribe()
{
var room = system.StreamOf(Constants.StreamProviderNameDefault, Constants.StreamNameSpaceCustomers);
subscription = await room.Subscribe <ChatRoomMessage>(message =>
{
if (message.User != UserName)
{
Console.WriteLine(message.Text);
}
});
}
public async Task Join()
{
subscription = await room.Subscribe <ChatRoomMessage>(message =>
{
if (message.User != UserName)
{
Console.WriteLine(message.Text);
}
});
await user.Tell(new Join { Room = RoomName });
}
private void SubscriptionDropped(StreamSubscription subscription, SubscriptionDroppedReason reason,
Exception?exception)
{
if (exception != null)
{
_logger.LogError($"PullRequestCommentsProjector dropped due to: {reason}", exception);
}
else
{
_logger.LogInformation($"PullRequestCommentsProjector dropped due to: {reason}");
}
}
protected override void ParseSubscription()
{
if (txtName.Text.Trim() == "" || txtSlug.Text.Trim() == "")
{
MessageBox.Show(i18n.FillStreamNameAndUrlFieldsMessage, i18n.AllFieldsRequiredTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
this.OnSubscriptionParsed(new SubscriptionParsedEventArgs(false));
return;
}
StreamProvider provider = null;
this.InvokeHandler(() => { provider = (StreamProvider)Providers.Instance.Dictionary[comboBoxProviders.SelectedItem.ToString().ToLower()]; });
string streamKey = string.Format("{0}@{1}", txtSlug.Text, provider.Name.ToLower());
if (Subscriptions.Instance.Dictionary.ContainsKey(streamKey))
{
MessageBox.Show(string.Format(i18n.StreamSubscriptionAlreadyExistsMessage, Subscriptions.Instance.Dictionary[streamKey].Name), i18n.SubscriptionExists, MessageBoxButtons.OK, MessageBoxIcon.Error);
this.OnSubscriptionParsed(new SubscriptionParsedEventArgs(false));
return;
}
try
{
var subscription = new StreamSubscription { Name = txtName.Text, Slug = txtSlug.Text, Provider=provider.Name };
using (var stream = StreamFactory.CreateStream(subscription))
{
if (!stream.IsValid())
{
MessageBox.Show(i18n.ErrorParsingStreamMessage, i18n.ErrorParsingStreamTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
this.OnSubscriptionParsed(new SubscriptionParsedEventArgs(false));
return;
}
}
this.OnSubscriptionParsed(new SubscriptionParsedEventArgs(true, subscription));
}
catch (Exception)
{
MessageBox.Show(i18n.ErrorParsingStreamMessage, i18n.ErrorParsingStreamTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
this.OnSubscriptionParsed(new SubscriptionParsedEventArgs(false));
}
}
public JustinTv(StreamSubscription subscription)
: base(subscription)
{
}
public Own3Dtv(StreamSubscription subscription)
: base(subscription)
{
}
public LiveStream(StreamSubscription subscription)
: base(subscription)
{
}