spring-boot-survival-training

Softwares Required

• Java 17
• Intellij IDE (Integrated Development Environment)
• Docker Desktop
• Maven Build tool
• PostMan for Rest API Testing
• Git Bash
• Tortoise Git
• Database Client

Steps to Build this project

start docker desktop
docker compose up
mvn clean spring-boot:run -Dspring-boot.run.profiles=redis

mvn clean spring-boot:run

Code coverage command

   mvn clean test

Rest Endpoints

• Add below Dependency

  org.springframework.boot spring-boot-starter-web

• HTTP Methods

  • GET
    • Path Parameter
    • Request Parameter
  • PUT
    • Request Body
  • POST
    • Request Body
  • DELETE
  • HTTP Status codes
    • 200 Series
    • 400 Series
    • 500 Series
  • Media Types : JSON , XML
    • Produces
    • Consumes

ORM Integration(hibernate to Mysql/Oracle/Postgres/MS SQL/H2)

• Add below Dependency and Driver

  org.springframework.boot spring-boot-starter-data-jpa

• Create a model with below Annotations

  • @Entity
  • @Id

• Create a Repository

  @Repository public interface StudentRepository extends JpaRepository<Student, Integer> { //Code Generation Technique: DSL }

Swagger ::: https://springdoc.org/

• Add dependencies in pom.xml

• Add openDoc Depdency

  org.springdoc springdoc-openapi-ui 1.6.13

• Add @ Bean for DocketAPI

• @Bean public OpenAPI customOpenAPI() { return new OpenAPI() .components(new Components()) .info(new Info().title("Training Demo Application API").description( "This is a sample Spring Boot RESTful service using springdoc-openapi and OpenAPI 3.")); }

• open url :http://localhost:port/context-path/swagger-ui.html

Datasource creation

• @ Bean for Programatic Data Source

• Embedded will be created if you add depedency

  com.h2database h2 runtime

• Connection Pooling

• use for Hikari: spring.datasource.type=com.zaxxer.hikari.HikariDataSource

• use the below config for Datasource

  spring: datasource: url: jdbc:mysql://localhost:3306/mysql username: root password: root driver-class-name: com.mysql.cj.jdbc.Driver

Log level Details

• debug=false
• logging.file=application.log
• logging.level.org.springframework=INFO
• logging.level.org.org.hibernate=WARN

Actuator Endpoints

• Add below Dependency in the pom.xml

  org.springframework.boot spring-boot-starter-actuator

• By default all actuator endpoints can be seen : "http://serveropaddress:port/context-path/actuator"

• By default Endpoints are disabled due to Secure data

• enable all endpoints by : management.endpoints.web.exposure.include: "*"

• Shutdown endpoint needs to be enabled. This will not be covered in all(*)

Spring Annotations

• @Component
• @RestController
• @RequestMapping
• @Service
• @Repository
• @SpringBootApplication
• @Bean
• @Autowired
• @Query
• @Transactional

Dev tools

• HMR(Hot Module Replacement)

  org.springframework.boot spring-boot-devtools runtime

• Ensures Restart of Project upon save

• It does not detect the pom.xml changes

YAML Usage

• Spring profiles active
• Server port
• Conext path : Different Application name
• usage of tab

Reading Properties Files inside the program

• for Multiple Properties

  @Autowired Environment env;

• for single property

  @Value("property.name)

Bean Validation

• use @ Valid wherever it needs to be validated
• @NotNull
• @Email
• @Min
• @Max
• @Size
• @Past/@Future
• @Negative/@Positive

Oracle Database connectivtity

• download JAR freom below:

  https://www.oracle.com/technetwork/apps-tech/jdbc-112010-090769.html

• Install to local repo:

  mvn install:install-file -Dfile=ojdbc6.jar -DgroupId=com.oracle -DartifactId=ojdbc6 -Dversion=12.1.0.1 -Dpackaging=jar

• Add pom dependency

  com.oracle ojdbc6 12.1.0.1

• create a user and give privilages

  CREATE USER crud IDENTIFIED BY crud;

  GRANT CONNECT TO crud;

  GRANT CONNECT, RESOURCE, DBA TO crud;

  GRANT CREATE SESSION TO crud;

  GRANT UNLIMITED TABLESPACE TO crud;

• CREATE SEQUENCE student_seq MINVALUE 1 MAXVALUE 9999999999 START WITH 4 INCREMENT BY 1;

MongoDB Integration

• Add below dependency in pom.xml

  org.springframework.boot spring-boot-starter-data-mongodb

• mention connection details in .yml file or(application.properties)

  spring: data: mongodb: host: localhost port: 27017 database: courses

• create a mongo Repository

  public interface CourseRepository extends MongoRepository<Course, String> {

  }

Rest Consumers

• http://www.groupkt.com/post/c9b0ccb9/country-and-other-related-rest-webservices.htm

Open API integration

• http://localhost:8090/crudapp/swagger-ui.html
• username is : admin& admin
• yet to implement documentation Tasks

Features Awaiting

• Exception Handling
  • Controller Specific
• Unit Testing
• Integration Testing
• Auditing...Added Auditing
• Oauth2 Integration
  • password flow
  • Authorization Code
  • Client Credentials
• Vault Service Integration
• Spring Cloud Config Integration
• Resilient 4J integration
• CQRS integration
• Native Queries
• JDBC and Batch Support
• Spring Cloud Sleuth support
• Spring Micrometer integration
• Dockerized this app
• K8S integration
• Making external calls to the app
• Jmeter Test cases
• API Integrations
• GraphQL
• WebFlux

Rest

- File Upload
- Web Socket

• Encryption utilities
• Base 64 encryption
• HAL Media types
• Actuator End points
• Encrypting
• Custom Logging: Specifying the logger
• Many to Many mapping
• two data sources in the same project
• Unit Test cases
• File upload and download