Blog entry by Saheb Banerjee

Anyone in the world
Saheb Banerjee - Saturday, 1 July 2023, 2:35 PM

Java Spring Boot, REST API, JPA and SQL database handling

Spring Boot Overview:

Spring Boot is an open-source Java-based framework used for creating standalone, production-grade Spring-based applications with minimal configuration. It is designed to simplify the development process and make it easier to create microservices and web applications.
Here are some key features and concepts of Spring Boot:

  1. Auto-configuration: Spring Boot provides automatic configuration for various dependencies and frameworks based on the project's classpath. It eliminates the need for manual configuration and reduces boilerplate code.

  2. Embedded server: Spring Boot includes an embedded servlet container, such as Tomcat, Jetty, or Undertow. It allows you to run your application as a standalone JAR file without the need for deploying it to a separate server.

  3. Starter dependencies: Spring Boot offers a wide range of starter dependencies that provide pre-configured dependencies for different use cases, such as web applications, databases, security, messaging, etc. These starters simplify the management of dependencies and their versions.

  4. Actuator: Spring Boot Actuator provides production-ready features to monitor and manage your application. It exposes various endpoints that allow you to gather information about your application's health, metrics, configuration, and more.

  5. Spring Boot CLI: Spring Boot Command-Line Interface is a tool that allows you to quickly develop Spring Boot applications using Groovy syntax. It helps in rapid prototyping and simplifies the setup process.

  6. Spring Data JPA: Spring Boot integrates with Spring Data JPA, which provides a convenient way to perform database operations using Java Persistence API (JPA). It simplifies database access and reduces the amount of boilerplate code needed.

  7. Spring Security: Spring Boot offers integration with Spring Security, a powerful and highly customizable security framework. It provides authentication, authorization, and other security features out of the box, making it easier to secure your applications.

Here are some links that can help you get started:

Rest API Overview:

A REST API (Representational State Transfer Application Programming Interface) is a set of rules and conventions that allow different software applications to communicate and interact with each other over the internet. It is based on the principles of the REST architectural style.

Here are some key concepts and characteristics of a REST API:

  1. Resources: In a REST API, resources are the key entities that the API exposes. Resources can be any information or object that needs to be accessed or manipulated. For example, in a social media application, resources could be users, posts, comments, or photos.

  2. HTTP Methods: REST APIs use HTTP methods to perform different actions on resources. The most commonly used HTTP methods in REST are:

    • GET: Retrieve a resource or collection of resources.
    • POST: Create a new resource.
    • PUT: Update an existing resource.
    • DELETE: Remove a resource.

  3. URLs/URIs: Each resource in a REST API is identified by a unique URL (Uniform Resource Locator) or URI (Uniform Resource Identifier). The URL represents the address or endpoint where the resource can be accessed.

  4. Stateless: REST APIs are stateless, meaning that each request from a client to the server should contain all the necessary information to process the request. The server does not store any information about the client's previous requests.

  5. Representation of Resources: Resources in a REST API are represented in a specific format, such as JSON (JavaScript Object Notation) or XML (eXtensible Markup Language). JSON is the most widely used format due to its simplicity and compatibility with various programming languages.

  6. Hypermedia (HATEOAS): Hypermedia as the Engine of Application State (HATEOAS) is a principle of REST APIs that allows clients to discover and navigate available resources dynamically through the API responses. In simpler terms, the API response provides links or URLs to related resources, enabling clients to explore the API's capabilities.

  7. Authentication and Authorization: REST APIs often include mechanisms for authentication and authorization to ensure secure access to protected resources. Common authentication methods include API keys, tokens (such as JWT), or OAuth.

Developers can create REST APIs using various programming languages and frameworks. Popular choices for building REST APIs include Node.js with Express, Python with Django or Flask, Ruby with Ruby on Rails, and Java with Spring Boot.

REST APIs have become a standard approach for building web services due to their simplicity, scalability, and compatibility with different platforms and technologies. They are widely used in web and mobile applications to enable communication between client applications and server-side resources.

JPA Overview:

JPA stands for Java Persistence API. It is a Java specification that provides a programming interface for managing relational data in Java applications using Object-Relational Mapping (ORM). JPA simplifies the process of working with databases by allowing developers to interact with databases using Java objects rather than writing SQL queries directly.


Learn More:

1. betterprogramming.pub  2. javatodev.com  3. javaguides.net  4. freecodecamp.org 5. javaguides.net 6. twilio.com


Modified: Sunday, 9 July 2023, 3:12 PM
Tags:
Permalink