SpringBootLatest

Spring Boot 3, JDK 17, latest swagger

Prerequisite

Spring web
Spring h2db
Spring JPA
Spring devtool
Spring swagger
Logging monitoring

MiniProject-1 Insurance:

Get all Plan categories
Create plan policy
View all policies
Enable/Disable policies
Hard delete policy

First analysis prepopulated data: analyse no of tables, fields, Entities, Repositories, Services, Controllers

DB URL: localhost:8080/h2-console

Swagger URL: http://localhost:8080/swagger-ui.html

################# 01-Mini Project ##################

-> Develop one microservice to manage insurance plans of our project

-> Microservice should have below functionalities

Create Plan
View Plans
Edit & Update Plan
Activate & De-Activate
Delete Plan (Hard Delete)

Key-Points:

Tech Stack : Spring Boot, REST API, Data JPA & H2 DB

-> Use Embedded Database (h2) For Storage -> Provide Swagger Documentation -> Push Code into Git Hub Repo -> Deploy Project into AWS Cloud Using JENKINS CI CD

############## Database Table ##############

Table-1 : PLAN_CATEGORY

CATEGORY_ID NUMBER PRIMARY KEY CATEGORY_NAME VARCHAR ACTIVE_SW CHAR CREATE_DATE DATE UPDATE_DATE DATE CREATED_BY VARCHAR UPDATED_BY VARCHAR

Table-2 : PLAN_MASTER

PLAN_ID NUMBER PRIMARY KEY PLAN_NAME VARCHAR PLAN_START_DATE DATE PLAN_END_DATE DATE PLAN_CATEGORY_ID NUMBER ACTIVE_SW CHAR CREATE_DATE DATE UPDATE_DATE DATE CREATED_BY VARCHAR UPDATED_BY VARCHAR

Entity Classes

PlanCategory.java Plan.java

Dao Layer / Repository Layer

PlanCategoryRepo.java PlanRepo.java

Service Layer

PlanService.java (I) PlanServiceImpl.java (C)

WebLayer

PlanRestController.java

Config

SwaggerConfig.java

################# Project Setup
################

Step-1) Create Spring Boot Application with below depenencies

	a)  starter-web  
	b)  starter-data-jpa  
	c)  h2   
	d) devtools  
	c) swagger   
	d) swagger-ui  
	e) project lombok  


		<dependency>
		<groupId>org.springdoc</groupId>
		<artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
		<version>2.1.0</version>
	</dependency>

Step-2) Configure DataSource Properties in application.properties file

Data Source Properties

spring.datasource.url=jdbc:h2:mem:testdb spring.datasource.username=ashokit spring.datasource.password=ashokit spring.datasource.driver-class-name=org.h2.Driver

ORM Properties

spring.jpa.hibernate.ddl-auto= update Note: For DB testing purpose run the application and access h2-console using below URL

	URL : http://localhost:port/h2-console

Step-3) Create Entity classes with Database tables mapping
Step-4 ) Create Repository Interfaces
Note: Run the application and verify database (Tables should be created)
Step-5) Create Service interface with Implementation (business logic)
Step-6) Create Rest Controller with Required methods (Request Handlers)
Step-7) Create Swagger Config class to generate documentation
Step-8) Run the application and test it using Swagger-UI

	http://localhost:8080/swagger-ui.html

-> When we create boot application we are getting application.properties file by default

-> application.properties file will represent data in key-value format

Ex:    

	server.port = 8080

-> properties file will be used only in java

-> YML stands for YET Another Markup Language

-> YML format is universal to represent data / configuration

-> YML can represent data in key-value, list and map also

-> YML format supported by several programming languages

-> Instead of application.properties we can use application.yml file in Spring Boot

-> In YML file indent spaces are very important

++++++++++++++++++++++ Reading Data From YML
+++++++++++++++++++++

------------------------application.yml---------------------------- spring:
datasource:
driver-class-name: org.h2.Driver
password: ashokit
url: jdbc:h2:mem:testdb
username: ashokit
jpa:
hibernate:
ddl-auto: update
plan-api:
messages:
planSaveSucc: Plan Saved Successfully
planSaveFail: Plan Save Failed
planUpdateSucc: Plan Updated Successfully
planUpdateFail: Plan Update Failed
planDeleteSucc: Plan Deleted Successfully
planDeleteFail: Plan Delete Failed
planStatusChange: Plan Status Changed Successfully
planStatusChangeFail: Plan Status Change Failed

----------------------------------AppProperties.java-------------------------------------
@Data
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "plan-api")
@Configuration
public class AppProperties {

private Map<String, String> messages = new HashMap<>();

}

--------------------------------PlanRestController.java--------------------------------

@RestController
public class PlanRestController {

private PlanService planService;  
  
private Map<String, String> messages;  
  
public PlanRestController(PlanService planService, AppProperties appProps) {  
	this.planService = planService;  
	this.messages = appProps.getMessages();  
	System.out.println(this.messages);  
}  

//methods of our rest controller

}

-> We should remove String literals and we should configure them in AppConstants class

public class AppConstants {

public static final String EMPTY_STR = "";  

public static final String PLAN_SAVE_SUCC = "planSaveSucc";  

public static final String PLAN_SAVE_FAIL = "planSaveFail";  
  
public static final String PLAN_UPDATE_SUCC = "planUpdateSucc";  
  
public static final String PLAN_UPDATE_FAIL  = "planUpdateFail";  
  
public static final String PLAN_DELETE_SUCC = "planDeleteSucc";  
  
public static final String PLAN_DELETE_FAIL = "planDeleteFail";  
  
public static final String PLAN_STATUS_CHANGE = "planStatusChange";  
  
public static final String PLAN_STATUS_CHANGE_FAIL = "planStatusChangeFail";

}

chirag1210/MiniProject