Making Webflux code readable with Kotlin coroutines

Recently, our crucial microservice delivering listing data switched to Spring WebFlux. A non-blocking approach gave us the possibility to reduce the number of server worker threads compared to Spring WebMvc. The reactive approach helped us to effectively build a scalable solution. Also, we entered the world of functional programming where code becomes declarative: statements reduced to the minimum immutable data preferred no side effects quite a neat chaining of method calls causing it easier to understand.

How to manage Spring Boot services configuration on GCP

Configuration management is one of the key challenges you have to face when you decide to build an application as a distributed system based on microservices deployed to the Cloud. There are multiple ways of addressing different aspects of this problem, using several tools such as Spring Cloud Config Server or Hashicorp Consul. However, this article will focus on the tools that Google Cloud Platform offers out of the box. The approaches mentioned should be seen as complementary rather than mutually exclusive.

Grouping and organizing Java classes

One of the first challenges a programmer has to face is organizing classes within a project. This problem may look trivial but it’s not. Still, it’s worth spending enough time to do it right. I’ll show you why this aspect of software development is crucial by designing a sample project’s architecture.

At Allegro, we build and maintain some of the most distributed and scalable applications in Central Europe. This poses many challenges, starting with architecture and design, through the choice of technologies, code quality and performance tuning, and ending with deployment and devops. In this blog, our engineers share their experiences and write about some of the interesting things taking place at the company.