The @Autowired annotation is one of the most popular and useful features of the Spring framework. By automatically injecting bean dependencies, it eliminates the need for manual lookup and wiring of beans. However, some questions remain around its performance impact. In this article, we’ll take an in-depth look at how @Autowired works under the hood…
Sending a high volume of emails is a common requirement for many applications. However, care must be taken to ensure good performance and deliverability when sending bulk emails. The Spring Framework (Spring Email) provides many options to optimize and scale email delivery. In this article, we’ll explore several strategies to improve the performance of sending…
In the world of web development, building high-performance APIs is a must. As more users and requests flood in, optimizing your API’s performance becomes crucial. Spring, a popular Java framework, offers a powerful solution by introducing asynchronous programming using @Async and CompletableFuture. APIs running on Spring Boot are great, but once that traffic ramps up,…
Spring Framework provides powerful dependency injection capabilities, allowing you to easily manage the components and their dependencies in your application. However, it’s not uncommon to encounter situations where a field annotated with @Autowired is unexpectedly null. In this article, we’ll explore common reasons for this issue and provide solutions to help you troubleshoot and resolve…
Java 21 introduced a new built-in HTTP client API called HttpClient to replace the older HttpURLConnection. HttpClient uses an asynchronous, non-blocking approach for better performance. However, its threading model includes one controversial design choice – thread pinning. In this comprehensive guide, we’ll dig into how it works, the issues it can cause, and techniques to…
JSON (JavaScript Object Notation) is a popular and versatile data format used for data exchange in many applications. Parsing JSON in Java, or the process of extracting data from JSON, is a fundamental skill for developers. In this beginner-friendly guide, we’ll explore how to parse JSON in Java using the widely adopted Jackson library. By…
In the dynamic landscape of Java development, creating Docker images for multi-module projects can sometimes be a challenging endeavor, especially when using the latest Java version and Spring framework. In this article, we’ll explore a common issue and its solutions when dealing with Maven Jib and multi-module projects in the context of Java 21 and…
Dockerizing Java apps using Jib is a powerful way to simplify the Docker image build process. If you’re working on a multi-module Maven project and need to create Docker containers for your modules, this guide will assist you in setting up Maven Jib effectively. We’ll walk through the necessary steps, provide detailed explanations, and address…
Introduction: When it comes to writing robust and reliable Java applications, testing plays a pivotal role in ensuring their quality. One critical aspect of testing is mocking, and there are various techniques and tools available to help us create mock objects for our tests. In this article, we’ll explore the art of mocking in Java…
Introduction Java 21 brings a game-changing feature to the world of programming: records. These are more than just Plain Old Java Objects (POJOs); they are a concise and expressive way to define immutable data classes, providing a host of benefits. In this article, we’ll explore records in Java 21 and understand why they’re creating a…
In the ever-evolving landscape of programming, staying up-to-date with the latest advancements is crucial. Java, a venerable language with a history of innovation, has recently released Java 21, and it’s packed with features that are set to redefine the way we code. In this comprehensive guide, we will delve into the details of Java 21,…
If you’re new to Java programming, you might be curious about how to work with data stored in a map. A map is a versatile data structure that allows you to store data in key-value pairs. But how do you go about accessing and processing that data? In this comprehensive guide, we’ll walk you through…
