Implementing JNDI with Springboot and JPA - spring-boot

Question

I try to configure JNDI in Tomcat. I tried it using 2 springboot applications.
The first application is using springboot starter jdbc
The second is using springboot starter jpa
On both applications controllers are the same:
#RequestMapping(
value = "/employees",
method = RequestMethod.GET)
public ResponseEntity<Object> getEmployees() {
System.out.println("inside getEmployees() method ....");
List<Employee> employeeList = repository.findAll();
return new ResponseEntity<>(employeeList, HttpStatus.OK);
}
I also configured jndi in my application properties:
spring.datasource.jndi-name=java:comp/env/jdbc/TestDB
In my repository class in the application that uses springboot starter jdbc:
#Repository
public class EmployeeRepository {
#Autowired
private JdbcTemplate jdbcTemplate;
#Transactional(readOnly = true)
public List<Employee> findAll() {
return jdbcTemplate.query("select * from EMPLOYEE", new EmployeeRowMapper());
}
}
On the other I use JpaRepository:
#Repository
public interface EmployeeRepository extends JpaRepository<EmployeeEntity, Long> {
#Override
#Transactional(readOnly = true)
List<EmployeeEntity> findAll();
}
So far so good. server.xml and context.xml are correctly configured in tomcat. For this test I am using MySQL v.5...
The application containing the springboot starter jdbc, i do access the database data using the get method. In the other application, the war is deployed but not started.
I have actually 3 issues:
I try using JNDI to handle a connection pool
Most of my developments are using JPA (i have many webservices for my application ...)
the last issue should be a new question: is there a way to use the Tomcat connexion pool to the database from an external application ? For example having a jar using the same connexion pool. For this point i didn't find any sample

Answer 1

I solved this issue doing the following:
I created a configuration class
#Configuration
#EnableJpaRepositories(basePackages = "fr.company.jndi.data.repository")
public class Config {
#Bean
public DataSource dataSource() {
DataSource dataSource = null;
Context ctx = null;
try {
ctx = new InitialContext();
dataSource = (DataSource) ctx.lookup("java:comp/env/jdbc/TestDB");
} catch (NamingException e) {
e.printStackTrace();
}
return dataSource;
}
}
And i also downgraded my spring boot version from version 3.0.0 to version 2.7.4-SNAPSHOT for example. I also added the following dependency:
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>