Eclipse Vertx is a robust technology to build reactive microservices or serverless functions. When you develop such applications, the role of server side validation rises. In traditional web applications we combine both client-side…
Tag: Java
Recently I started to learn Clojure, and usually, my first phase is to complete small programming exercises. To practice Clojure I decided to solve some CodingBat problems. A common task here is to…
In some form or another, but exceptions exist in almost any languages. Due to the fact, that Clojure actually runs on JVM, it inherits its exception system from Java. From a technical point…
An authentication with tokens became a must-have feature for modern web apps. It suits natively to single page applications and mobile applications. While Spring is de facto standard in Java ecosystem, there are…
When we talk about Java collections, we consider two things. First, more wide concept, means implementations of common data structures. An another, narrow understanding, corresponds to concrete interfaces and their implementations, that are…
In the previous post we have already talked about authentication in Spring Webflux. We implemented a component, that contains a required business logic to process login and signup, and to issue JWT. However,…
Almost any more or less complex application has to deliver notifications. As usual, it is done via traditional emails, especially in cases of password reset messages or transactional notifications etc. There is a…
Unit tests serve to verify individual components, mostly on business logic level, and to ensure that components perform as expected. In Spring Webflux apps this level is a level of services. Here we…
The topic of error handling in web applications is very important. From a client perspective it is essential to know on how was the request proceeded and in case of any error is…
Multi-factor authentication became a common practice for many cases, especially for enterprise ones, or those that deal with sensitive data (like finance apps). Moreover, MFA is enforced (especially in the EU) by law…