WEB LAYER CLIENT => displayed on the client

CONTROLLER => getPlayerController => Autowired Player DAO => view -> json data => client

DAO layer => PlayerDAO => @Autowired JDBCTemplate

=> Jdbc Template => Querying => From the Database, Mapping to => Player Model [Encapsulated Data]

DATABASE

Layers representation -> https://drive.google.com/file/d/1I3tRl8oKDn7YJBADJUisSqqQXmTJy-D0/view?usp=sharing

//FLOW***//

CLIENT => BROWSER => REQUEST => http://localhost:8080/movies => GET TOMCAT SERVER => 127.0.01:8080 => SpringBootJDBCApp => Class => @SpringBootApplication SpringBootJDBCApp => @ComponentScan => Player Controller @RestController[Bean] => Default Constructor => @Autowired Player DAO PlayerDAO.getAllPlayers() =>Communicate with the Database using JDBC Template=> @Autowired JDBC Template => Querying, RowMapping [Player Model] DAO=>

Flow Diagram -> https://drive.google.com/file/d/1zh-lA4336Upk4H67mXPlJ_LVnkx16Ko6/view?usp=sharing

JPA

=> No Row Mapper => No schema.sql

@Repository

@Entity1 => @Table => In Database => Hibernate Core Will Drop in the database and create new one => @Column, @Id,=> Columns inside our database @Entity2 @Entity3

JPA Diagram -> https://drive.google.com/file/d/17oghBGETMLB6HeFLVZiI1QQfSXEpor2R/view?usp=sharing

//***************************** USING JPARepository and RESTFUL ************************//

HTTP => Hyper Text Transfer Protocol

Hypermedia Information, Collaborative Media => TCP Connections by default on PORT 80

Stateless => No Particular Form => HTML, JSON, XML, PDF, PNG, JPEG => Data Exchange

Statefull => Restful API => JSON, XML => Proper Form

URL + HTTP + Restful API

URL: Location your server => 192.168.8.8:8080 => Flipkart.com

HTTP: TCP by 80 => Stateless => Data Exchange between your server and client

Restful API => Representational State Transfer => It should make sense

Client And Server

Browser App <=> Spring Boot App

URL + HTTP + Restful API[JSON,XML]

Weather App => Client => Request Temperature of Mumbai => Weather Data Its raining

GoogleMaps => Server => Response Temperature of Mumbai

Location: Mumbai Temperature: 80 celsius

---

Request Line => Contains HTTP Method like(Get, Post, Put, Delete)

Request Header => Data with additional information about the request you are passing => Configurations for your request line

Request Body => content of the entity player

Client

Request Line => http://localhost:3000/add-todo + POST Method

Request Header => Content Type => Application/JSON

Request Body => { "todoName": "Spring API", "todoDescription": "Spring API Representation", "id": 1 }

Server

Response Line => http://localhost:3000/add-todo + POST Method

Response Header access-control-allow-origin →* connection →keep-alive content-length →119 content-type →application/json; charset=utf-8 date →Wed, 28 Sep 2022 05:25:41 GMT etag →W/"77-GK4wpj1Vv1Ho5AHfUOXxsHhTdA0" keep-alive →timeout=5 x-powered-by →Express

Response Body/Message { "id": 1, "todoName": "Spring API", "todoDescription": "Spring API Representation", "_id": "6333dad5a2d5136faf28489b", "__v": 0 }

---

REST -> [https://drive.google.com/file/d/1Jpdv77XTyuGgAbOkfHniEOO14I2vI4l-/view?usp=sharing]

HTTP Methods

1. POST => CREATING A RESOURCE => h2Database testdb
2. GET => READING A RESOURCE => h2Database:testdb
3. PUT => UPDATING A RESOURCE => h2Database:testdb
4. DELETE => DELETING A RESOURCE=> h2Database:testdb --todo
5. PATCH => UPDATING CERTAIN ATTRIBUTE(S) of a resource

//*************************

REST APPS

JSON DATA BINDING

{ “name”: value }

=> different apps exchange data

=> Jackson Dependency => POJO(Plain Old Java Object) => Converted => JSON Data Binding

//********************

EXCEPTION HANDLING IMG ->https://drive.google.com/file/d/1EoTugnH8_29jMweFOvcLHZgYi3zc7GsD/view?usp=sharing ]