public SyncService(IDomainWebsocketClient client)
{
// -- websockets
this.websocketClient = client;
this.websocketClient.OnMessage += HandleMessage;
this.websocketClient.OnConnectionError += OnConnectionError;
// -- push/poll
this.push = new PushService(this.websocketClient);
this.push.OnSendFailed += PushOnOnSendFailed;
this.poll = new PollService();
// -- state machine
this.stateMachine = new StateMachine <State, Trigger>(State.Idle, FiringMode.Queued);
this.stateMachine.OnTransitioned(OnTransitioned);
this.stateMachine.OnUnhandledTrigger((state, trigger) =>
{
Logger.Debug($"Unhandled trigger: {trigger} [{state}]");
});
this.VersionFetcher = new HttpVersionFetcher();
InitStateMachine();
this.scheduleStopWatch.Start();
}
private async Task <bool> InternalAssertConnected(CancellationToken cancellationToken)
{
if (this.client != null &&
this.wsClient != null &&
this.wsClient.IsConnected &&
!this.receiveMessagesCts.IsCancellationRequested)
{
Logger.Trace("Already connected");
return(false);
}
var retryCount = 0;
do
{
try
{
this.receiveMessagesCts.Cancel();
await this.messageLoopTask;
Logger.Trace("Message loop task finished");
this.receiveMessagesCts = new CancellationTokenSource();
this.client = new WebSocketClient(this.options);
this.wsClient = await this.client.ConnectAsync(this.Endpoint, cancellationToken);
this.messageLoopTask = Task.Run(() => ReceiveMessagesLoop(this.receiveMessagesCts.Token), cancellationToken);
Logger.Log("Connected to server");
return(true);
}
catch (OperationCanceledException)
{
throw;
}
catch (Exception ex)
{
Logger.Warn($"Connection failed, retry {++retryCount}/10");
Logger.Debug($"{ex}");
await Task.Delay(2000, cancellationToken);
}
} while (retryCount < 10);
throw new WebsocketConnectionFailedException();
}