Spring Boot Java Challenge

This is my solution to the Ada School's Spring Boot Java Challenge.

Directions

Coding Challenge

A bus company wants to start using technology and allow their users to book online tickets. Please help them build a REST API Level 2 (preferrable) that lets them control their trip bookings, supporting the following operations:

• Create a new booking with the following information: name, email, origin, destination, departure date and time and duration.
• Update an existing booking
• Find a booking using its ID.
• Delete an existing booking.

Expected Quality Attributes:

• Using coding best practices.
• SOLID principles.
• Clear usage of Dependency injection.
• Correct usage of Spring Boot annotations.
• Correct connection with a persistance layer.

Desired technology stack:

• Java / Kotlin
• Spring Boot
• MongoDB

Thoughts

• Debatable if you should just use one collection object versus splitting the object into more documents
• You would first signup and create an account. After that, you would be able to purchase a ticket.
• One to many relationship? A person can buy multiple tickets.
• Make ticket an embedded document inside person document?
• Embedded documents create data duplication, which increases storage requirements. However, embedded documents make querying for data easier.
• This article gives an overview on how to use DBRefs and @DocumentReference to replace embedded documents.
• I decided to take an approach similar to the article.
• Added basic CORS config versus having to annotate methods or controllers.
• Debatable if adding final to parameters is really necessary. It doesn't really hurt, and it helps make you more deliberate about what you are doing in the code.

Continued Development

• Could add Thymeleaf for a frontend.
• Testing
• CommandLineRunner to seed database
• Duration is problematic inside entities. Need to investigate more. Might need to use @Transient and store the duration in the database as a string.

Useful Resources

• Bootify
• YouTube - MongoDB with Spring Boot Crash Course - Full Tutorial
• Blog - embedded documents with spring data and mongo
• Mongo - embedded documents
• Mongo - spring boot
• Baeldung - spring data mongodb tutorial
• Github - spring boot mongodb tutorial
• Digital Ocean - spring boot mongodb
• Github - mongodb spring boot nested collection
• Stack Overflow - how to update embedded objects in spring mongodb
• Java tech online - spring boot mongodb using mongotemplate examples
• Medium - building and consuming rest apis in spring microservices
• Mongo - spring boot
• YouTube - MongoDB – Model One-to-One, One-to-Many Relationships Embedded Documents | Spring Boot | Java Techie
• Medium - mongodb vs mongodb srv whats the difference
• Blog - querysrv errors when connecting to mongodb atlas
• Baeldung - spring profiles
• YouTube - Spring Boot MongoDB CRUD 2024 | REST API Operations Tutorial
• YouTube - MongoDB CRUD operation using Springboot
• Stack Overflow - how to create an id within the embedded document using mongodb and spring data
• Baeldung - spring bot mongodb auto generated field
• Stack Overflow - how to generate uuid using spring annotations
• Spring - mongodb reference
• Github - Problem with replacement of @DBRef to @DocumentReference
• Bootify - document reference in spring boot mongodb
• Stack Overflow - how to model java time duration in mysql database
• Stack Overflow - thymeleaf template does not work upon adding cors configuration