inaction.md

SpringBoot Workshop - In Action

1. Spring Initializr

   • Gradle
   • JDK 11
   • Web
   • JPA
   • H2
   • Lombok

2. Find user by email

   • User
     • Non-final attributes
     • Lombok
   • UserService
     • Tony Stark
     • Steve Rogers
     • Bruce Banner
     • Thor Odinson
     • Clinton Barton
     • Natasha Romanoff
   • UserServiceTest

3. Endpoint to find user by email

   • UserController
   • Query param
   • Run main
   • Run with Gradle wrapper
   • Postman
   • Runtime exception

4. Error handling

   • HttpStatusException
   • ErrorMessage
   • ErrorHandler (RestControllerAdvice, ExceptionHandler)

5. Add more users

   • Collection on UserService
   • for
   • Run test
   • Java Stream API (filter, findFirst, Optional)

6. List users by last name

   • Add functionality to service
   • Test new functionality

7. List user emails by birthday month

   • Add birth date to users base
     • Stark: 1970-05-29
     • Rogers: 1018-07-04
     • Banner: 1969-12-18
     • Odinson: 1000-01-01
     • Barton: 1971-01-07
     • Romanoff: 1984-11-22
   • Add functionality to service
   • Test new functionality

8. Extract repository

   • Return User object only
   • Return Stream instead of Collection

9. Apply Spring DI

   • Turn service into a component
   • Inject service into controller
   • Turn repository into a component
   • Inject repository into service
   • Change test to use Mockito runner

10. Use Spring Data JPA

    • Add schema definition on data.sql
    • Annotated User entity
    • Transform repository to interface
      • Remove streams to simplify
      • Query by month not supported by query language
      • Fix test
    • Enable Spring repositories

11. Add basic CRUD to controller

    • Update does not override id or email
    • Introduce method reference
    • Return appropriate status code
    • POSTMAN
    • User id generate type as IDENTITY

12. Integration Tests

    • Add REST-assured to build.gradle