ionaxiong / Quering-data-with-Spring-Data-JPA

Repo for my "Simply Important" session at Tietoevry about different methods of reading data using Spring Data JPA

Querying data with Spring Data JPA

Session structure

Welcome, in this session you will learn how to query data using Spring Data JPA. The session is divided into 3 parts:

1. Using JPA repositories - branch name part-1-using-jpa-repos;
2. Derived queries - branch name part-2-derived-queries;
3. Query annotation - branch name part-3-query-annotation;

Each part (and its git branch) has a corresponding complete branch: part-1-complete, part-2-complete, part-3-complete.

Go through parts step-by-step by executing git checkout command, e.g.

git checkout -b part-1-using-jpa-repos origin/part-1-using-jpa-repos

System requirements

Make sure that your machine has the following things installed:

• Java 8
• Maven 3.7
• Docker
• Docker Compose (though later versions of Docker include CLI commands for compose as well)

It is also recommended to have the following (though not crucial):

• DBMS application, e.g. MySQL Workbench or DBeaver
• IDE application, e.g. Visual Studio Code, IntelliJ, Eclipse

Starting the project

1. Start the mysql-db service in Docker container:

   1.1. Navigate to the root directory of the project in a terminal

   1.2. Execute the following command:

   docker-compose up -d

   OR if you use the latest version of Docker

   docker compose up -d

2. Start the backend application:

   2.1. Navigate to the backend directory of the project in a terminal

   2.2. Start the project via IDE that you have. If you don't have IDE, then you can execute the following Maven command in the directory via a terminal:

   mvn spring-boot:run