May 5 · 11 min read · Source: Methods to Move Cross-Cutting Logic Out of Controllers Without Building a Mystery Box You know the scene: three controllers, ten endpoints, and every method has repeated snippets for authentication checks, request validation, timing, metric...
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Apr 29 · 12 min read · A comprehensive guide to understanding how Spring manages objects, when they come alive, and how they talk to each other. 1. What is a Bean? In simple terms, a Bean is just a Java object managed by th
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Dec 25, 2025 · 4 min read · Modern Spring applications work smoothly not because of magic, but because of two foundational principles: Inversion of Control (IoC) and Dependency Injection (DI). Understanding these properly changes how you design Java applications. What Is Invers...
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Dec 12, 2025 · 5 min read · Source: Techniques to Manage Global Variables in Spring Boot Without Breaking Thread-Safety 1. Introduction: Why “Global Variables” Are a Hidden Danger in Spring Boot 1.1 The Naive Way — And Why It Fails Consider this simple (but dangerou...
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Dec 5, 2025 · 5 min read · Source: How Spring Uses Dynamic Proxy to Create Repository Interfaces 1. Introduction – Why Spring’s Dynamic Proxy Is Pure Magic in Disguise 1.1 The Core Idea of Dynamic Proxy A Dynamic Proxy in Java is a runtime-generated class that impl...
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Dec 3, 2025 · 5 min read · Source: Techniques Spring Uses to Create Beans from beans.xml — The Hidden XML Parsing Journey Revealed 1. Introduction: Why Understanding XML Bean Creation Still Matters 1.1 How XML Configuration Fits into the Spring IoC Container When S...
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Dec 2, 2025 · 6 min read · Source: Techniques to Master Bean Visibility in Spring: Comparing @ComponentScan, @Import, and @Configuration 1. Understanding the Fundamentals 1.1 The Role of Bean Visibility Bean visibility defines which beans are available for dependen...
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Nov 30, 2025 · 7 min read · Source: Ways to Control Spring Bean Visibility Using autowireCandidate=false 1. Bean Visibility in Spring Configurations Spring’s bean visibility is a JavaConfig feature: the container uses the Java access modifiers of @Bean methods to decide ...
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Aug 25, 2025 · 5 min read · Source: Why UnsatisfiedDependencyException Occurs in Spring Boot and How to Resolve It 1. What Is UnsatisfiedDependencyException? The UnsatisfiedDependencyException occurs in Spring when the framework cannot resolve a dependency during bean cr...
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Aug 10, 2025 · 5 min read · Source: Reasons and Ways to Fix 'Required a Bean That Could Not Be Found' in Spring Boot 1. What Does 'Required a Bean That Could Not Be Found' Mean? Spring Boot relies on dependency injection to wire beans together. When a component or class ...
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