In Spring Framework, the @PostConstruct and @PreDestroy annotations are lifecycle annotations that allow you to define methods to be executed after the bean is initialized and before the bean is destroyed, respectively. These annotations are part of the Javax standard (JSR-250), but they are widely used in Spring to manage the lifecycle of beans. Here’s […]

The Spring Boot lifecycle involves a sequence of steps that Spring Boot applications follow from initialization to shutdown. This lifecycle is highly automated, and Spring Boot manages many tasks behind the scenes to simplify application startup, configuration, and shutdown. Here’s a breakdown of the key stages and components in the Spring Boot lifecycle: 1. Application […]

Adding Swagger to a Spring Boot project involves a few steps. Swagger simplifies API development by automatically generating interactive API documentation from your annotations. Here’s how to add Swagger to your project: Add Swagger dependencies: You need to include the Swagger dependencies in your pom.xml file if you’re using Maven or build.gradle if you’re using […]

A Dockerfile is a text file that contains a set of instructions used to build a Docker image. It defines the environment in which an application will run, including the base image, application dependencies, configurations, and any other commands that should be executed when building the image. Purpose of a Dockerfile: Automates the process of […]

Docker Compose vs. Dockerfile: What’s the Difference? Both Docker Compose and a Dockerfile are essential tools for working with Docker, but they serve different purposes and are used in different scenarios. Below is a comparison to clarify when to use each: 1. Dockerfile A Dockerfile is a script that contains instructions to create a Docker […]

In Spring Framework, both @RestController and @Controller are used to define controllers that handle HTTP requests, but they serve different purposes and are used in different contexts. Here’s a comparison of @RestController and @Controller: 1. @RestController Purpose: @RestController is a specialized version of @Controller in Spring Boot that is used for creating RESTful web services. […]

In Spring Framework, @Component, @Service, @Repository, and @Controller are stereotype annotations used to declare classes as Spring-managed beans. Each of these annotations has a specific role within different layers of the application, and although they function similarly in terms of bean registration, they serve different purposes and provide additional semantics that help developers organize their […]

In microservices architecture, design patterns play a critical role in ensuring scalability, resilience, flexibility, and maintainability. Here are some of the most commonly used design patterns in microservices architectures: 1. API Gateway Pattern The API Gateway is an entry point for all client requests to the microservices. It handles routing, authentication, rate limiting, and aggregating […]

Deploying a Spring Boot application on Docker involves several steps, from creating a Docker image to running the containerized application. Here’s a step-by-step guide to help you through the process. Prerequisites Docker Installed: Ensure Docker is installed on your system. You can download it from the Docker website. Spring Boot Application: A Spring Boot application […]

To create a custom email validation in Spring Boot, you can follow these steps: Create a Custom Annotation for Email Validation. Create a Validator Class to Implement the Validation Logic. Use the Custom Annotation in Your Model Class. Let’s walk through the process step by step. Step 1: Create a Custom Annotation First, you need […]