The @Primary annotation is used to give a higher preference to a specific bean when multiple beans of the same type exist. This is useful when you have multiple implementations of an interface or multiple beans of the same type, and you want to indicate a default or primary choice. 1. Dependency Setup Make…
Introduction: In Java, the String class is a part of the java.lang package and is used to represent sequences of characters. Strings are immutable, which means their values cannot be changed once they are created. In this tutorial, we'll explore various operations and methods available in the String class. 1. Creating Strings: Strings in…
Inversion of Control (IoC) is a design principle where the control flow of a program is inverted: instead of the application controlling the flow of execution, it delegates control to an external framework or container. This helps in achieving loose coupling and better modularization of code. In this tutorial, we'll explore the concept of…
Semantic Versioning (SemVer) is a versioning scheme designed to bring clarity and meaning to version numbers in software development. It provides a systematic way to convey information about changes in a release, helping developers and users understand the impact of updating to a new version. Basics of SemVer: SemVer version numbers follow the format:…
1. Introduction: In Spring Boot, the @ConditionalOn annotation is used to conditionally enable or disable the creation of a bean based on certain conditions. Combined with the @Bean annotation, it allows for dynamic bean creation depending on the runtime environment or configuration. 2. Basic @ConditionalOnProperty: The @ConditionalOnProperty annotation is one of the most commonly…
Step 1: Set up a Spring Boot Project Start by creating a new Spring Boot project using Spring Initializr or your preferred IDE. Include the dependencies for "Spring Web" and "Spring Data MongoDB." Step 2: Configure MongoDB Connection Open your application.properties file and configure the MongoDB connection settings: spring.data.mongodb.host=localhost spring.data.mongodb.port=27017 spring.data.mongodb.database=mydatabase Step 3: Create…
The Adapter Pattern is a structural design pattern that allows incompatible interfaces to work together. It acts as a bridge between two incompatible interfaces by converting the interface of a class into another interface that a client expects. This pattern involves a single class called Adapter, which is responsible for joining functionalities of independent…
This tutorial assumes that you have a basic understanding of Java and Spring Boot. Step 1: Set Up a Spring Boot Project You can use Spring Initializr to generate a basic Spring Boot project. Visit https://start.spring.io/ and select the following options: Project: Maven Project Language: Java Spring Boot: Choose a version Packaging: Jar or…
Reactive programming is a paradigm that deals with asynchronous data streams and the propagation of change. In this tutorial, we'll focus on building a simple Spring WebFlux application with R2DBC for interacting with a MySQL database reactively. Prerequisites: JDK 11 or later installed. Maven or Gradle for project management. MySQL database server installed and…
GraphQL is a query language for APIs, and it's a powerful alternative to REST. Spring Boot, combined with the Spring GraphQL module, makes it easy to create GraphQL-based APIs. Prerequisites: Basic knowledge of Spring Boot and Java. JDK 8 or later installed on your machine. An Integrated Development Environment (IDE) such as IntelliJ IDEA…