Spring Boot is built on top of the Spring framework. Spring Boot helps you to build production grade application easily.

Spring Boot has a layered architecture. Which means each layer directly communicate with it below or upper layer.

 

Spring Boot layers

 

• Presentation Layer

v  Presentation layer is having a responsibility of handling HTML requests and authenticate the requests. It also translates the JSON parameters to objects

• Business Layer

v  Its handles all the business logics validation and authorization.

• Persistence Layer

v  It contains all the storage logic like database queries and also helps to translate business object into database rows

• Database Layer

v  The database layer consists of the database such as MySQL, PostgreSQL, MongoDB, etc. All the database related operations like CRUD (Create, Read/Retrieve, Update, and Delete) are performed in this layer.

Spring Boot layers

Spring Boot Flow Architecture 

·         A client makes the https request (GET/POST/PUT)

·         Then it goes to controller maps it with appropriate method and call business logic if required

·         Business logic is performed in the service layer which might be performing the logic on the data from the database which is mapped through JPA with model/entity class

Search: spring boot deep dive,spring security architecture,how spring security works in spring boot,spring boot security and oauth2 in depth from scratch,spring boot security tutorial step by step,spring security amigoscode