Spring webflux and reading from database

One option would be to use alternative SQL clients that are fully non-blocking. Some examples include: https://github.com/mauricio/postgresql-async or https://github.com/finagle/roc. Of course, none of these drivers is officially supported by database vendors yet. Also, functionality is way much less attractive comparing to mature JDBC-based abstractions such as Hibernate or jOOQ. The alternative idea came to me … Read more

What is the difference between Dataflow programming and Reactive programming?

Reactive Programming is a form of Dataflow programming only. But its also a paradigm which is oriented around propagation of changes along with data flows Like a example given on Wiki Page a:=b+c would mean that a is being assigned the result of b + c, in the instant the expression is evaluated, and later, … Read more

How to do error handling with bloc pattern in flutter?

This is how we handle it in my team: First we build our main page (The navigation root) like this: @override Widget build(BuildContext context) { return BlocBuilder<SuspectEvent, SuspectState>( bloc: _bloc, builder: (context, state) { if (state.cameras.isEmpty) _bloc.dispatch(GetCamerasEvent()); if (!_isExceptionHandled) { _shouldHandleException( hasException: state.hasException, handleException: state.handleException); } return Scaffold( … We declare the _shouldHandleException like this … Read more

Reactive Extensions (Rx) + MVVM =?

I’ve written a framework that represents my explorations in this question called ReactiveUI It implements both an Observable ICommand, as well as ViewModel objects who signal changes via an IObservable, as well as the ability to “assign” an IObservable to a property, who will then fire INotifyPropertyChange whenever its IObservable changes. It also encapsulates a … Read more

How to call back async function from Rx Subscribe?

Ana Betts’ answer works in most scenarios, but if you want to block the stream while waiting for the async function to finish you need something like this: Observable.Interval(TimeSpan.FromSeconds(1)) .Select(l => Observable.FromAsync(asyncMethod)) .Concat() .Subscribe(); Or: Observable.Interval(TimeSpan.FromSeconds(1)) .Select(_ => Observable.Defer(() => asyncMethod().ToObservable())) .Concat() .Subscribe();

Comparison of Java reactive frameworks [closed]

I’m working on RxJava and I did some evaluations on Akka-Streams and Reactor recently. As far as I can tell with all the libraries, they converge to a single concept called Reactive-Streams so you can go back and forth between the implementations. I believe RxJava is the most generic of all, has zero dependencies on … Read more