1. Overview In this article, we are discussing the Spring org.springframework.beans.factory.NoSuchBeanDefinitionException – this is a common exception thrown by the BeanFactory when trying to resolve a bean that simply isn’t defined in […]
1. What Is a Circular Dependency? It happens when a bean A depends on another bean B, and the bean B depends on the bean […]
1. Overview In this quick tutorial, we’ll explain Spring’s UnsatisfiedDependencyException, what causes it, and how to avoid it. 2. Cause of UnsatisfiedDependencyException UnsatisfiedDependencyException gets thrown when, as the […]
1. Overview In this quick article, we’re going to show different approaches of injecting prototype beans into a singleton instance. We’ll discuss the use cases and […]
1. Introduction In this quick tutorial, we’ll take a look at Spring’s method-level dependency injection support, via the @Lookup annotation. 2. Why @Lookup? A method annotated with @Lookup tells Spring […]
1. Overview There are two kinds of beans in the Spring bean container: ordinary beans and factory beans. Spring uses the former directly, whereas latter […]
1. Introduction Lombok is an extremely useful library overcoming boilerplate code. If you are not familiar with it yet, I highly recommend taking a look […]
1. Introduction In this tutorial, we’re going to show how to inject Java collections using the Spring framework. Simply put, we’ll demonstrate examples with the List, Map, Set collection interfaces. 2. List With @Autowired […]
1. Introduction In this basic tutorial, we’ll learn how to do simple XML-based bean configuration with the Spring Framework. 2. Overview Let’s start by adding […]
1. Overview In this tutorial, we’re going to learn about Spring’s @Order annotation. The @Order annotation defines the sorting order of an annotated component or bean. It has an optional […]
1. Overview In this quick tutorial, we’ll discuss Spring’s @Primary annotation which was introduced with version 3.0 of the framework. Simply put, we use @Primary to give higher preference to […]
1. Overview In this Spring Framework tutorial, we’ll demonstrate how to use annotations related to dependency injection, namely the @Resource, @Inject, and @Autowired annotations. These annotations provide classes with […]
1. Overview Starting with Spring 2.5, the framework introduced annotations-driven Dependency Injection. The main annotation of this feature is @Autowired. It allows Spring to resolve and inject collaborating beans […]
1. Introduction Arguably one of the most important development principles of modern software design is Dependency Injection (DI) which quite naturally flows out of another critically important […]
1. Overview In this tutorial, we’ll introduce the concepts of IoC (Inversion of Control) and DI (Dependency Injection), as well as take a look at […]
1. Overview In this tutorial, we’ll see how we can implement Server-Sent-Events-based APIs with Spring. Simply put, Server-Sent-Events, or SSE for short, is an HTTP […]
1. Overview In this tutorial, we demonstrate how to use the Spring WebFlux module using Kotlin programming language. We illustrate how to use the annotation-based […]
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 […]
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 […]
1. Introduction In this tutorial, we’ll explore the @Async annotation in Spring MVC, and then we’ll get familiar with Spring WebFlux. Our goal is to have a […]
