Prints the transaction isolation level used by Hibernate in a Spring Boot application

ApplicationTests.java

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class ApplicationTests {

	@Autowired
	private SessionFactory sessionFactory;

	@Test
	public void test() {
		try (Session session = sessionFactory.openSession()) {
			Transaction txn = session.beginTransaction();
			session.doWork(connection -> {
				int isolationLevel = connection.getTransactionIsolation();
				String isolationLevelName = ConnectionProviderInitiator.toIsolationNiceName(isolationLevel);
				System.out.println("Transaction isolation level: " + isolationLevelName);
			});
			txn.rollback();
		}
	}

}