PostgresSQL With Spring boot (JDBC)

From https://dzone.com/articles/bounty-spring-boot-and-postgresql-database

Build (and skip tests)

./mvnw clean package -DskipTests

Launch the PostgreSQL server

(cd ../postgres; docker compose up -d; ; docker compose ps)

Launch Spring Boot server

./mvnw spring-boot:run

Get the list of employees

curl -X GET http://localhost:8080/postgressApp/employeeList
curl -X GET http://localhost:8080/postgressApp/employeeList | jq .

Create an employee

curl -X POST -H "Content-Type: application/json" \
    -d \
    '{ "employeeId": "2", "employeeName": "Joe", "employeeEmail": "[email protected]",  "employeeAddress":"GB" }' \
    http://localhost:8080/postgressApp/createEmp

curl -X GET http://localhost:8080/postgressApp/employeeList | jq .

Update an employee

curl -X PUT -H "Content-Type: application/json" \
    -d \
    '{ "employeeId": "2", "employeeName": "Marie" }' \
     http://localhost:8080/postgressApp/executeUpdateEmp

curl -X GET http://localhost:8080/postgressApp/employeeList | jq .

Delete an employee

curl -X DELETE -H "Content-Type: application/json" \
    -d \
    '{ "employeeId": "2"}' \
    http://localhost:8080/postgressApp/deleteEmpById

curl -X GET http://localhost:8080/postgressApp/employeeList | jq .

Code review

The main (server) class is src/main/java/com/sample/postgress/PostgressApplication.java.

The REST controller class is src/main/java/com/sample/postgress/controller/ApplicationController.java.

The Service class and interface are in src/main/java/com/sample/postgress/service.

The Entity class is src/main/java/com/sample/postgress/entity/Employee.java.

The Mapper class is src/main/java/com/sample/postgress/mapper/EmployeeRowMapper.java.

JDBC operations are in the class src/main/java/com/sample/postgress/dao/EmployeeDaoImpl.java.

Exercice

Refactor the classes in order to change the type of employeeId in SERIAL. SERIAL is a pseudo-type to define auto-increment integer columns in tables.

The src/main/resources/schema.sql is:

CREATE TABLE employee
(
 employeeId SERIAL,
 employeeName VARCHAR(100) NOT NULL,
 employeeAddress VARCHAR(100) DEFAULT NULL,
 employeeEmail VARCHAR(100) DEFAULT NULL,
 PRIMARY KEY (employeeId)
);