Rajkumar Yadav’s Post

Spring Boot Scenario-Based Questions Here are some real-world Spring Boot scenarios you might face during development : Scenario 1: You are working on a Spring Boot application that requires loading different configurations for development and production environments. How to achieve it?... Scenario 2: You have a service class that needs to be injected into multiple controllers. What are the different ways to achieve this in Spring Boot? Scenario 3: You have a REST API, and when an invalid ID is provided, it should return a custom error message with a 404 Not Found status. How would you handle this? Scenario 4: You need to log events in your application instead of using System.out.println(). How would you do it? Scenario 5: You have an API that fetches user details based on the user Id. How would you capture it in Spring Boot? Which annotation would you use? 💬 Interested ones, share your answers or thoughts in the comments below! #SpringBoot #JavaDevelopers #BackendDevelopment #CodingInterview #SpringFramework #ProblemSolving #Java

💥 Developers are still fighting over this — application.properties vs application.yml in Spring Boot. So… which one’s actually better? Let’s settle it. 👇 ⚙️ application.properties ✅ Simple key–value format ✅ No indentation errors ✅ Easy to override from CLI ✅ Legacy-friendly Perfect for small or stable projects where clarity matters more than structure. 🧩 application.yml 🌈 Clean hierarchy 🌱 Multi-profile support in one file 📚 Better organization for complex configs Ideal for modern, microservice-style setups that grow over time. Here’s the truth — neither is “better.” It’s all about context: ➡ .properties wins for simplicity ➡ .yml wins for scalability So pick your weapon wisely. 🧠 🔁 Repost if you’ve argued about this before 😅 👣 Follow Pondurai Madheswaran for more Spring + Java insights daily. #SpringBoot #JavaDevelopers #CodingBestPractices #BackendDevelopment

🌿 Spring Boot — Simplifying Spring Application Development Spring Framework is a comprehensive, open-source framework for building enterprise-grade Java applications. It provides powerful features like dependency injection, transaction management, and security — but often requires extensive configuration to set up. To solve that, Spring Boot was introduced. 🚀 Spring Boot was designed with one clear goal in mind — to make building Spring applications easier, faster, and more efficient. Traditional Spring setups often required complex configurations and boilerplate code. Spring Boot changes that by offering: ✅ Auto-configuration for common setups ✅ Embedded servers for quick deployment ✅ Production-ready tools out of the box It empowers developers to focus more on writing business logic rather than spending hours on configuration. In short, Spring Boot makes Spring development effortless — turning ideas into running applications in no time. 💡 #Spring #SpringBoot #Java #BackendDevelopment #SoftwareEngineering #Programming

Spring Framework 7.0 has officially introduced Built-in Concurrency Limiting and Retry Support using the new resilience annotations in the Nov 2025 release. 𝐖𝐡𝐚𝐭’𝐬 𝐍𝐞𝐰 𝐚𝐧𝐝 𝐖𝐡𝐚𝐭’𝐬 𝐒𝐭𝐢𝐥𝐥 𝐢𝐧 𝐏𝐫𝐨𝐠𝐫𝐞𝐬𝐬 🤷♂️ New features added to the spring core: - @Retryable for declarative retries - RetryTemplate for programmatic retry control - @ConcurrencyLimit for throttling concurrent access Means, no more need for the external spring-retry dependency. And, that's really awesome 👍 Sam Brannen mentioned in his blog that the current core retry support is still minimal and in active development. 🔴 It does not yet include everything that spring-retry used to provide — for example, the convenient @Recover mechanism. ℹ️ The feature request for a @Recover equivalent is still open on GitHub: Open Issue 👉 https://lnkd.in/e_CD_Q-s In other words, Spring 7 gives you the foundation for retries and resilience, but some higher-level features are still on the roadmap. For now, programmatic handling with RetryTemplate is the way to implement fallback behavior. 📖 Official blog: https://lnkd.in/ezgReFTH I hope you find it helpful! #SpringFramework #Java #JavaDevelopment #SoftwareEngineering #Microservices #SpringBoot #SpringCore #Resilience #RetryMechanism #Concurrency #SoftwareDevelopment #TechUpdate #EnterpriseJava #SpringCommunity #Programming #DevCommunity

Today I learned something interesting about Spring Boot’s @Async annotation. I was debugging why an async method wasn’t actually running in parallel — and eventually realized it was because I was calling it from within the same class. Since the call never went through the Spring proxy, the @Async behavior didn’t trigger. Lesson: @Async only works when the method is invoked through a Spring-managed proxy — not via direct internal calls within the same bean. Moving the method to a separate service (or injecting the bean itself via a proxy) fixed it instantly. A small reminder that many “magic” framework features are really just smart proxies under the hood — and understanding how they work can save hours of debugging. Have you ever run into similar proxy or async surprises in Spring Boot? #TodayILearned #SpringBoot #Java #Microservices #BackendDevelopment #LearningInPublic

Understanding HandlerInterceptor Order in Spring Boot When you register multiple HandlerInterceptors in a Spring Boot application, have you ever wondered which one runs first? Here’s how Spring decides the order: Unlike Filters (which use @Order), HandlerInterceptors run in the order they are registered inside your WebMvcConfigurer. #SpringBoot #Java #SoftwareEngineering #BackendDevelopment #SpringMVC #CleanArchitecture

"𝙎𝙥𝙧𝙞𝙣𝙜 𝘽𝙤𝙤𝙩 𝙙𝙤𝙚𝙨𝙣’𝙩 𝙘𝙤𝙣𝙛𝙪𝙨𝙚 𝙮𝙤𝙪. 𝙄𝙩 𝙥𝙧𝙚𝙥𝙖𝙧𝙚𝙨 𝙮𝙤𝙪 𝙛𝙤𝙧 𝙧𝙚𝙖𝙡-𝙬𝙤𝙧𝙡𝙙 𝙨𝙮𝙨𝙩𝙚𝙢𝙨." When you finally understand Spring Boot… and then Spring Boot hits you with 27 new annotations you’ve never seen before 🤯 As Java developers, we all start with the basics: ✔️ Controller ✔️ Service ✔️ Repository …and think, “𝙊𝙠𝙖𝙮, 𝙣𝙖𝙖𝙣 𝙢𝙖𝙨𝙩𝙚𝙧 𝙖𝙖𝙮𝙞𝙩𝙚𝙣.”😎 But the deeper you go, Spring Boot teaches you something important: 👉 Enterprise development isn't about writing code. It’s about writing scalable, maintainable, testable, production-ready systems. And that’s where the so-called “magic” comes in — dependency injection, auto-configuration, profiles, AOP, caching, validation, event listeners, starters… the list never ends. But here’s the real truth: Spring Boot isn’t trying to confuse you. It’s teaching you how real-world software works #Java #SpringBoot #SpringFramework #BackendDevelopment #SoftwareEngineering #JavaDeveloper #CodingJourney #ProgrammingHumor #TechCommunity

Today I learned something interesting about Spring Boot’s @Async annotation. I was debugging why an async method wasn’t actually running in parallel — turns out, it was because I was calling it from the same class, so Spring’s proxy never intercepted the method call. Lesson: @Async only works when the method is called through the Spring proxy, not directly inside the same bean. Moving the method into a separate service (or injecting self via proxy) fixed the issue instantly. It’s a small reminder that framework features are just smart proxies under the hood — and understanding how they work saves hours of debugging. Have you hit similar proxy or async issues in Spring Boot? #TodayILearned #SpringBoot #Java #Microservices #BackendDevelopment #LearningInPublic

Before the release of Spring Boot 4, it was necessary to explicitly include the following dependency for JSON serialization and deserialization: <dependency> <groupId>com.fasterxml.jackson.dataformat</groupId> <artifactId>jackson-dataformat-xml</artifactId> </dependency> However, starting with Spring Boot 4.0.x, this functionality is included with the spring-boot-starter-webmvc artifact or dependency as a tool with dependency as a spring-boot-starter-jackson, and the import changes accordingly, exhibiting a transitive nature. For more details about Jackson 3 support in Spring Boot 4, please read through https://lnkd.in/gvGN58M7 Spring I/O #springboot4 #springframework #java