public DotNetBrowserService(
[Import(typeof(SVsServiceProvider))] IServiceProvider serviceProvider,
IEventAggregator eventAggregator)
{
_serviceProvider = serviceProvider;
_eventAggregator = eventAggregator;
try {
_messageQueue = new BlockingCollection <string>(new ConcurrentQueue <string>());
_manualResetEvent = new ManualResetEvent(false);
_disposables = new List <IDisposable>()
{
_eventAggregator.GetEvent <WebviewDidInitializeEvent>().Subscribe(_ => {
Log.Debug($"{nameof(WebviewDidInitializeEvent)} Message QueueCount={QueueCount}");
_manualResetEvent.Set();
_disposable = _eventAggregator.GetEvent <SessionReadyEvent>().Subscribe(nested => {
Log.Debug($"{nameof(SessionReadyEvent)} Message QueueCount={QueueCount}");
if (!_manualResetEvent.WaitOne(0))
{
_manualResetEvent.Set();
}
});
}),
_eventAggregator.GetEvent <SessionLogoutEvent>().Subscribe(_ => {
Log.Debug($"{nameof(SessionLogoutEvent)} Message QueueCount={QueueCount}");
_queueTokenSource?.Cancel();
_messageQueue.ClearAll();
_manualResetEvent.Reset();
})
};
//https://stackoverflow.com/questions/9106419/how-to-cancel-getconsumingenumerable-on-blockingcollection
_processorTokenSource = new CancellationTokenSource();
var processorToken = _processorTokenSource.Token;
_processor = System.Threading.Tasks.Task.Factory.StartNew(() => {
try {
while (_manualResetEvent.WaitOne())
{
if (processorToken.IsCancellationRequested)
{
break;
}
_queueTokenSource = new CancellationTokenSource();
var queueToken = _queueTokenSource.Token;
try {
foreach (var value in _messageQueue.GetConsumingEnumerable(_queueTokenSource.Token))
{
if (queueToken.IsCancellationRequested)
{
break;
}
if (_messageQueue.Count > QueueLimit)
{
_messageQueue.ClearAll();
_manualResetEvent.Reset();
#pragma warning disable VSTHRD010
ReloadWebView();
#pragma warning restore VSTHRD010
break;
}
Send(value);
}
}
catch (OperationCanceledException ex) {
//no need to pass the error, this exception is expected
Log.Verbose(ex.Message);
}
catch (Exception ex) {
Log.Error(ex, ex.Message);
}
}
}
catch (Exception ex) {
Log.Error(ex.Message);
}
}, processorToken, TaskCreationOptions.None, TaskScheduler.Default);
}
catch (Exception ex) {
Log.Fatal(ex, nameof(DotNetBrowserService));
}
}