Introduction in Java with Springboot

Spring boot this exclusive open source, Microsserviche-based Java Web Framework. The Spring Boot framework creates a fully production-ready environment that is completely configurable using its prebuilt code within its codebase. The microservice architecture provides developers with a fully enclosed application, including embedded application servers.

JAVA

Java this eternal object-oriented programming language that produces software for multiple platforms. When a programmer writes a Java application, the compiled code (known as bytecode) runs on most operating systems (Os) Including Windows, Linux and Mac OS. Java derives much of its syntax from the C and C ++ programming languages.

Springboot

Spring boot this exclusive open source Java-based framework used to create a micro Service. It is developed by Pivotal Team and is used to build stand-alone and production ready spring applications. This chapter will give you an introduction to Spring Boot and familiarizes you with its basic concepts.

Pre-requisites

• Complete beginners. We got you covered. We’ll start from compilation & interpretation.
• Programmers switching from other languages.
• Java programmers who are not feeling confident about their existing Java skills.
• Java programmers who want to learn about design principles & best practices. Any serious programmer should know this stuff!

Agenda of Java with Springboot

Introduction – Java

Java Fundamentals – Object-oriented Design

Thinking in Objects

• Basics
• Coherence, Coupling, and God Classes
• What Is an Object?

Defining Behavior and State

• Problems with println()
• Money and Delegation: Getters and Setters Are Evil

Extending Classes

• The Is-a Test
• Simple Extension and Template Method
• Delegation Under Inheritance: Shape
• Liskov Substitution: Stack, Ver. 1
• Fragile Base Classes: Stack, Ver. 2

Defining Class Contracts with Interfaces

• Defining Contracts
• Fixing Fragility
• Dependency Inversion

Working Without Getters and Setters

• The Open Closed Principle
• Builder

Testing OO systems

• Dependency Injection
• Summing Up

What Is Object Orientation?

• Course Overview
• What is Object Orientation?
• From Use Cases to Conceptual Classes
• Class Relations
• Deriving Software Classes, Part 1
• Deriving Software Classes, Part 2
• Demo: Instance and Static Methods

Encapsulation and Abstraction

• Module Overview
• More Class Relationships
• Encapsulation
• Assigning Responsibilities
• Demo: Exercising the System
• Demo: the Single Responsibility Principle
• Demo: Defending Encapsulation
• Abstraction: Encapsulation or Inheritance?

Inheritance and Polymorphism

• Module Overview
• Don’t Repeat Yourself
• The Liskov Substitution Principle
• Overriding and Dynamic Dispatch
• Demo: Dynamic Dispatch
• Using Overridden Methods
• Understanding Inheritance
• Abstract Classes and the Open-closed Principle

Interfaces, Composition, and System Design

• Module Overview
• Interfaces What Are They, and Why Do We Need Them?
• Demo: Paying through an Interface
• Demo: The Fragile Base Class Problem
• Delegation and the Decorator Pattern
• The Strategy Pattern
• The Interface Segregation Principle
• The Dependency Inversion Principle

Introducing – Spring Boot

• Getting Started
• Learning Path
• Spring Boot Overview
• Features of Spring Boot
• Summary

Bootstrapping a Simple Application

• Overview
• Demo: Spring Initializr
• Demo: Spring Boot CLI
• Demo: Auto Configuration
• Spring Boot Annotations
• Spring Boot Properties
• Spring Boot Profiles
• Summary

Accessing Data with Spring Boot and H2

• Overview
• H2 Database
• Why Use Templating Engines?
• ORM with JPA
• Entities
• Demo: H2 Integration
• Demo: H2 Console
• Demo: Partials
• Summary

Configuring a Spring MVC Application with Spring Boot

• Overview
• MVC Design Pattern
• Demo: MVC in Action
• Packaging and Deployment
• Demo: Uber Jar
• Summary

Building a RESTful Web Application with Spring Boot

• Overview
• REST Architecture
• Demo: RESTful Web Application
• Demo: Testing with URL
• Response Formats
• Exception Handling
• Demo: Exception Handling
• Summary

Building a GraphQL Server with Spring Boot

• Overview
• GraphQL Overview
• GraphQL Dependencies
• GraphQL Schemas
• Demo: Schemas
• Query Operations
• Mutations
• Exceptions
• Demo: GraphiQL
• Summary

Enabling Actuators, Metrics, and Health Indicators

• Overview
• Actuator
• Custom Endpoints
• Summary

Testing with Spring Boot

• Overview
• Testing Overview
• Unit Testing
• Integration Tests

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