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Simultaneous Spring WebClient Calls 1. Overview Typically when making HTTP requests in our applications, we execute these calls sequentially. However, there are occasions when we might want to perform these requests simultaneously. For example, we may want to do this when retrieving data from multiple sources or when we simply… Continue Reading spring-webclient-simultaneous-calls
Spring Webflux and CORS 1. Overview In a previous post, we learned about Cross-Origin Resource Sharing (CORS) specification and how to use it within Spring. In this quick tutorial, we’ll set up a similar CORS configuration using Spring’s 5 WebFlux framework. First of all, we’ll see how we can enable the… Continue Reading spring-webflux-cors
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Introduction to the Functional Web Framework in Spring 5 1. Introduction Spring WebFlux framework introduces a new functional web framework built using reactive principles. In this tutorial, we’ll learn how to work with this framework in practice. We’ll base this off of our existing tutorial Guide to Spring 5 WebFlux. In… Continue Reading spring-5-functional-web
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Exploring the Spring 5 WebFlux URL Matching 1. Overview Spring 5 brought a new PathPatternParser for parsing URI template patterns. This is an alternative to the previously used AntPathMatcher. The AntPathMatcher was an implementation of Ant-style path pattern matching. PathPatternParser breaks the path into a linked list of PathElements. This chain… Continue Reading spring-5-mvc-url-matching
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Handling Errors in Spring WebFlux 1. Overview In this tutorial, we’ll look at various strategies available for handling errors in a Spring WebFlux project while walking through a practical example. We’ll also point out where it might be advantageous to use one strategy over another and provide a link to… Continue Reading spring-webflux-errors
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Spring 5 Testing with @EnabledIf Annotation 1. Introduction In this quick article, we’ll discover the @EnabledIf and @DisabledIf annotations in Spring 5 using JUnit 5. Simply put, those annotations make it possible to disable/enable particular test if a specified condition is met. We’ll use a simple test class to show… Continue Reading spring-5-enabledIf
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Spring WebFlux Filters 1. Overview The use of filters is widespread in web applications since they give us a way to modify a request or response without changing our endpoints. In this quick tutorial, we’ll describe possible ways of implementing them with the WebFlux Framework. As we won’t go into… Continue Reading spring-webflux-filters
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Validation for Functional Endpoints in Spring 5 1. Overview It’s often useful to implement input validation for our APIs to avoid unexpected errors later when we’re processing the data. Unfortunately, in Spring 5 there’s no way to run validations automatically on functional endpoints as we do on annotated-based ones. We have… Continue Reading spring-functional-endpoints-validation
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Spring 5 and Servlet 4 – The PushBuilder 1. Introduction The Server Push technology — part of HTTP/2 (RFC 7540) — allows us to send resources to the client proactively from the server-side. This is a major change from HTTP/1.X pull-based approach. One of the new features that Spring 5… Continue Reading spring-5-push
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Debugging Reactive Streams in Spring 5 1. Overview Debugging reactive streams is probably one of the main challenges we’ll have to face once we start using these data structures. And having in mind that Reactive Streams have been gaining popularity over the last years, it’s a good idea to know… Continue Reading spring-debugging-reactive-streams
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