Two-Factor Authentication (2FA) adds an extra layer of security to your application by requiring users to provide two different authentication factors. In this tutorial, we'll implement Two-Factor Authentication in a Spring Boot application using Spring Security. Prerequisites Basic understanding of Spring Boot and Spring Security JDK installed on your machine Maven or Gradle installed…
Keycloak is an open-source Identity and Access Management solution, providing features such as Single Sign-On (SSO), OAuth 2.0, and OpenID Connect. In this tutorial, we will integrate Keycloak with a Spring Boot application for secure authentication and authorization. Prerequisites Java JDK installed on your machine Maven or Gradle installed Keycloak installed (You can download…
In the realm of Java development, effective documentation is paramount for understanding code functionality and promoting collaboration among developers. JavaDoc stands as a cornerstone tool, facilitating the generation of comprehensive API documentation directly from source code comments. In this tutorial, we'll delve into the art of documenting Java code with examples, showcasing how JavaDoc…
OAuth2 Social Login is a common feature in modern web applications, allowing users to sign in using their social media accounts. Spring Boot provides robust support for implementing OAuth2 authentication with popular social platforms like Facebook, Google, and GitHub. In this tutorial, we'll guide you through the process of setting up OAuth2 Social Login…
Apache POI is a popular Java library that allows developers to create, modify, and display Excel files (.xls and .xlsx formats). In this tutorial, we will explore how to use Apache POI to perform common tasks such as reading, writing, and formatting Excel files. Table of Contents Introduction to Apache POI Setting up Apache…
Python is a versatile language that is widely used for network programming due to its simplicity and robustness. In this tutorial, we'll cover some fundamental concepts of network programming in Python, including working with sockets, creating a simple server and client, and making HTTP requests. Table of Contents Introduction to Sockets Creating a Simple…
In Jenkins, Shared Libraries allow you to write reusable code that can be used in multiple pipelines across different Jenkinsfiles. This tutorial will guide you through creating a Jenkins Shared Library, which can simplify your pipeline scripts, promote code reuse, and improve maintainability. Prerequisites Jenkins installed and running Basic familiarity with Groovy scripting Understanding…
In distributed systems, network issues and transient failures are common challenges. To handle these scenarios gracefully, it's essential to have retry mechanisms in place. Spring Retry, a subproject of the Spring Framework, provides a simple but powerful way to add retry capabilities to your Spring Boot applications. In this tutorial, we'll explore how to…
In Spring Boot applications, the @Scheduled annotation provides a convenient way to execute scheduled tasks. Whether you need to run a method at fixed intervals, after a specific delay, or based on a cron expression, @Scheduled offers flexibility and simplicity. In this tutorial, we'll explore how to use @Scheduled with various examples to schedule…
In a Spring Boot application, the concepts of Context Path and Servlet Path are essential for understanding how requests are handled and mapped to the appropriate controllers. These paths play a crucial role in routing incoming requests to the correct endpoints. In this tutorial, we'll explore the differences between Context Path and Servlet Path…