In this Code we have used Collection API as a Dummy Data Base for storing the data instead of using traditional Database

Start with Collection Framework, then start with below DB

1. in Memory DB
2. RDBMS DB
3. NoSQL DB
4. Cache

► Download the sample java and microservice application from gitHub: https://github.com/admindebu/ ► Follow on Facebook: https://www.facebook.com/TechTalkDebu ► Follow on LinkedIn: https://www.linkedin.com/in/debu-paul

► Here is our amazing playlist for Core Java, Spring MVC/Boot, Git and Micro service 

1. Core Java :: https://www.youtube.com/watch?v=IR_h0okI_eU&list=PLRlT3yKdok6o5pLrr74SdpRI0ZV-KbGOl
2. Spring MVC & Spring Boot :: https://www.youtube.com/watch?v=f-Wk1t8Cfio&list=PLRlT3yKdok6rFd0_O6-lpuIrNwFgxP_b8
3. Micro Service :: https://www.youtube.com/watch?v=pscyaLdGtnI&list=PLRlT3yKdok6r_6j4Y0R75TP4WiiaT21K7
4. Git/GitHub :: https://www.youtube.com/watch?v=XHxBAyEnl4E&list=PLRlT3yKdok6ojVpar7ImPHZ6JbSy6Lnj7

Watch my "Most Watched Videos"

► HTTPS & HTTPS protocol :: https://www.youtube.com/watch?v=BlnSSD0Vw98&list=PLRlT3yKdok6ovZ3BGGM3eanawiNUOcrWz

► Required Application

1. JDK 1.8 - Execution environment
2. Maven 3.6 - Proejct build tool
3. IDE ( Eclipse/Intellij ) - Writing Code
4. For API Testing - Postman or Restclient
   ► Generate Spring Boot Template use SPring Initializr : https://start.spring.io/

► API URL 

:::: GET ::: Url :- http://localhost:8080/api/v1/user

:::: POST ::: Url -> http://localhost:8080/api/v1/user give below value in "raw" section of "body" tab and select (JSON)

{
	"id": 1,
	"name": "Debu",
	"address": "INDIA",
	"emailId": "[email protected]"
}

:::: Put(Update) ::: Url -> http://localhost:8080/api/v1/user/2

give below value in "raw" section of "body" tab and select (JSON)

{
	"id": 2,
	"name": "PAUL",
	"address": "UK",
	"emailId": "[email protected]"
}

:::: Delete ::: Url -> http://localhost:8080/api/v1/user/2

► Software installation

Java 8 Download lInk : https://www.oracle.com/java/technologies/javase-jdk8-downloads.html install java Goto Java 8 JDK path in c drive Add in environment variables : JAVA_HOME = value Edit path variable : %JAVA_HOME%\bin -> then save Come to cmd and check java version Command : javac check java version : java -version

Install Maven : Check maven install & Version command : mvn -version set the M2_HOME from environment variables set the path varibales = %M2_HOME%\bin check mvaen version in cmd : mvn -version For building application CMD with maven command is : mvn clean install ( make sure you will be in POM file location )

Install postman : https://www.postman.com/downloads/

HTTP Methods : GET , POST, PUT, DELETE, PATCH

HTTP status Code : ( Home status code ) Ref: https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 1xx (Informational) 3xx ( Redirect ) 2xx (Success or Ok ) 4xx ( Client Side error ) - 400 ( Bad Request ) / 401 ( unauthroized acces ) / 404 ( URL not found ) / 405 (Method not allowed) 5xx ( Server side error ) - 500 (internal server Error) / 503 ( Bad Gaetway)

Play List : https://www.youtube.com/watch?v=CFoxrsEdo-w&list=PLRlT3yKdok6pLwhX58LwNBcsqGl_K206b Tutorial for beginners with examples, Interview Questions and Concepts.