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📝 WalkthroughWalkthroughThis PR introduces a complete car rental management system with a JavaFX frontend, JPA-based persistence layer, and supporting services. It adds entity models (Car, Customer, Booking, Extra, Location, Payment), data access repositories, business logic services, UI controllers and FXML views, Maven/JPA configuration, database schema, and initialization utilities. Changes
Sequence DiagramssequenceDiagram
participant User
participant App
participant DataInitializer
participant EntityManager
participant Database
User->>App: launch()
App->>App: start(Stage)
App->>App: initDatabase()
App->>EntityManager: getEntityManager()
App->>DataInitializer: seed(em)
DataInitializer->>Database: Query existing cars
alt No cars exist
DataInitializer->>Database: Persist 20 cars
DataInitializer->>Database: Persist 4 extras
end
DataInitializer->>EntityManager: close()
App->>App: load main_view.fxml
App->>App: show stage
sequenceDiagram
participant User
participant BookingController
participant BookingService
participant CarRepository
participant CustomerService
participant Database
User->>BookingController: select car & dates
BookingController->>BookingController: updatePriceDisplay()
BookingController->>BookingController: recalculate days & price
User->>BookingController: confirm booking
BookingController->>CustomerService: findCustomerByEmail(email)
alt Customer not found
BookingController->>CustomerService: create & save customer
end
BookingController->>BookingService: createBooking(booking)
BookingService->>Database: save booking
BookingService->>CarRepository: mark car unavailable
BookingService->>Database: persist car status
BookingController->>User: show success dialog
sequenceDiagram
participant User
participant MainViewController
participant FXMLLoader
participant CarController
participant CarService
participant Database
User->>MainViewController: click "Bilar" button
MainViewController->>MainViewController: showCarView()
MainViewController->>FXMLLoader: load car_view.fxml
FXMLLoader->>CarController: initialize()
CarController->>CarService: getAllCars()
CarService->>Database: query cars
CarController->>CarController: populate table
MainViewController->>User: display car view
Estimated Code Review Effort🎯 4 (Complex) | ⏱️ ~65 minutes Poem
🚥 Pre-merge checks | ✅ 1 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (1 passed)
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Actionable comments posted: 3
🧹 Nitpick comments (4)
src/main/java/org/example/Car.java (3)
8-12: Entity setup looks good; consider adding explicit no-argument constructor.The entity and ID configuration are correct. However, while Java provides a default no-argument constructor, explicitly declaring one is a JPA best practice for clarity and to prevent issues if you later add other constructors.
🔎 View suggested addition
private Long id; + public Car() { + // No-argument constructor required by JPA + } + private String brand;
14-19: Consider adding column constraints for data integrity.Adding
@Columnannotations with constraints (e.g.,nullable,length) improves data integrity at the database level and makes the entity contract more explicit.🔎 View suggested enhancement
- private String brand; - private String model; - private int year; - private String type; - private double price; - private double dailyPrice; // ny egenskap + @Column(nullable = false, length = 100) + private String brand; + + @Column(nullable = false, length = 100) + private String model; + + @Column(nullable = false) + private int year; + + @Column(nullable = false, length = 50) + private String type; + + @Column(nullable = false) + private double price; + + @Column(nullable = false) + private double dailyPrice;
8-41: Consider implementing equals, hashCode, and toString methods.For JPA entities, implementing these methods improves debuggability and ensures correct behavior in collections. Focus on business keys rather than the generated ID.
src/main/resources/META-INF/persistence.xml (1)
8-20: Consider adding connection pooling configuration.For better performance and resource management, configure a connection pool (e.g., HikariCP). This is especially important for applications handling concurrent requests.
🔎 Example connection pooling configuration
<property name="hibernate.hbm2ddl.auto" value="update"/> <property name="hibernate.show_sql" value="true"/> + + <!-- Connection pooling --> + <property name="hibernate.connection.provider_class" + value="org.hibernate.hikaricp.internal.HikariCPConnectionProvider"/> + <property name="hibernate.hikari.minimumIdle" value="5"/> + <property name="hibernate.hikari.maximumPoolSize" value="20"/> + <property name="hibernate.hikari.idleTimeout" value="300000"/> </properties>Note: This requires adding HikariCP as a dependency.
📜 Review details
Configuration used: defaults
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (4)
JavaJPA.iml(1 hunks)src/main/java/org/example/App.java(1 hunks)src/main/java/org/example/Car.java(1 hunks)src/main/resources/META-INF/persistence.xml(1 hunks)
🔇 Additional comments (3)
JavaJPA.iml (1)
1-18: IDE-specific configuration file.This IntelliJ IDEA module file configures the JPA facet for development. While helpful for IDE users, ensure your build system (Maven/Gradle) doesn't depend on this file, as it won't be available in CI/CD or for developers using other IDEs.
src/main/java/org/example/App.java (1)
47-56: Helper method is well-structured.The
createCarhelper method effectively reduces code duplication and centralizes the dailyPrice calculation logic.However, verify that the dailyPrice calculation (0.5% of total price) aligns with your business requirements. For example, a luxury car priced at 2,500,000 would have a daily rental rate of 12,500, which seems high.
src/main/resources/META-INF/persistence.xml (1)
18-18: This setting is appropriate for a development project. For production applications, usevalidatewith dedicated schema migration tools like Flyway or Liquibase.
src/main/java/org/example/App.java
Outdated
| EntityManagerFactory emf = Persistence.createEntityManagerFactory("carRentalPU"); | ||
| EntityManager em = emf.createEntityManager(); | ||
|
|
||
| em.getTransaction().begin(); | ||
|
|
||
| // Rensa tabellen innan vi lägger in nya bilar | ||
| em.createQuery("DELETE FROM Car").executeUpdate(); | ||
|
|
||
| // Skapa och persist 20 bilar med rimliga dagspriser | ||
| em.persist(createCar("Volvo", "XC90", 2025, "Lyxbil", 800_000)); | ||
| em.persist(createCar("BMW", "7 Series", 2024, "Lyxbil", 1_000_000)); | ||
| em.persist(createCar("Audi", "A8", 2023, "Lyxbil", 900_000)); | ||
| em.persist(createCar("Toyota", "Corolla", 2022, "Personbil", 200_000)); | ||
| em.persist(createCar("Honda", "Civic", 2021, "Personbil", 190_000)); | ||
| em.persist(createCar("Ford", "Focus", 2022, "Personbil", 210_000)); | ||
| em.persist(createCar("Mercedes", "Sprinter", 2023, "Minibuss", 350_000)); | ||
| em.persist(createCar("Volkswagen", "Transporter", 2023, "Minibuss", 330_000)); | ||
| em.persist(createCar("Renault", "Kangoo", 2022, "Minibuss", 300_000)); | ||
| em.persist(createCar("Fiat", "500", 2023, "Småbil", 120_000)); | ||
| em.persist(createCar("Mini", "Cooper", 2022, "Småbil", 150_000)); | ||
| em.persist(createCar("Volkswagen", "Up!", 2022, "Småbil", 110_000)); | ||
| em.persist(createCar("Porsche", "911", 2025, "Sportbil", 1_500_000)); | ||
| em.persist(createCar("Ferrari", "Roma", 2024, "Sportbil", 2_000_000)); | ||
| em.persist(createCar("Lamborghini", "Huracan", 2025, "Sportbil", 2_500_000)); | ||
| em.persist(createCar("Tesla", "Model S", 2023, "Lyxbil", 900_000)); | ||
| em.persist(createCar("Kia", "Rio", 2022, "Småbil", 130_000)); | ||
| em.persist(createCar("Hyundai", "i30", 2023, "Personbil", 195_000)); | ||
| em.persist(createCar("Opel", "Vivaro", 2022, "Minibuss", 320_000)); | ||
| em.persist(createCar("Jaguar", "F-Type", 2024, "Sportbil", 1_600_000)); | ||
|
|
||
| em.getTransaction().commit(); | ||
| em.close(); | ||
| emf.close(); |
There was a problem hiding this comment.
CRITICAL: Add proper resource management and error handling.
The EntityManager and EntityManagerFactory are not closed if an exception occurs, leading to resource leaks. Additionally, there's no transaction rollback on error.
🔎 Apply this diff to use try-with-resources and proper error handling
public static void main(String[] args) {
- EntityManagerFactory emf = Persistence.createEntityManagerFactory("carRentalPU");
- EntityManager em = emf.createEntityManager();
-
- em.getTransaction().begin();
-
- // Rensa tabellen innan vi lägger in nya bilar
- em.createQuery("DELETE FROM Car").executeUpdate();
-
- // Skapa och persist 20 bilar med rimliga dagspriser
- em.persist(createCar("Volvo", "XC90", 2025, "Lyxbil", 800_000));
- em.persist(createCar("BMW", "7 Series", 2024, "Lyxbil", 1_000_000));
- em.persist(createCar("Audi", "A8", 2023, "Lyxbil", 900_000));
- em.persist(createCar("Toyota", "Corolla", 2022, "Personbil", 200_000));
- em.persist(createCar("Honda", "Civic", 2021, "Personbil", 190_000));
- em.persist(createCar("Ford", "Focus", 2022, "Personbil", 210_000));
- em.persist(createCar("Mercedes", "Sprinter", 2023, "Minibuss", 350_000));
- em.persist(createCar("Volkswagen", "Transporter", 2023, "Minibuss", 330_000));
- em.persist(createCar("Renault", "Kangoo", 2022, "Minibuss", 300_000));
- em.persist(createCar("Fiat", "500", 2023, "Småbil", 120_000));
- em.persist(createCar("Mini", "Cooper", 2022, "Småbil", 150_000));
- em.persist(createCar("Volkswagen", "Up!", 2022, "Småbil", 110_000));
- em.persist(createCar("Porsche", "911", 2025, "Sportbil", 1_500_000));
- em.persist(createCar("Ferrari", "Roma", 2024, "Sportbil", 2_000_000));
- em.persist(createCar("Lamborghini", "Huracan", 2025, "Sportbil", 2_500_000));
- em.persist(createCar("Tesla", "Model S", 2023, "Lyxbil", 900_000));
- em.persist(createCar("Kia", "Rio", 2022, "Småbil", 130_000));
- em.persist(createCar("Hyundai", "i30", 2023, "Personbil", 195_000));
- em.persist(createCar("Opel", "Vivaro", 2022, "Minibuss", 320_000));
- em.persist(createCar("Jaguar", "F-Type", 2024, "Sportbil", 1_600_000));
-
- em.getTransaction().commit();
- em.close();
- emf.close();
-
- System.out.println("20 cars saved successfully!");
+ EntityManagerFactory emf = Persistence.createEntityManagerFactory("carRentalPU");
+ try (EntityManager em = emf.createEntityManager()) {
+ try {
+ em.getTransaction().begin();
+
+ // Rensa tabellen innan vi lägger in nya bilar
+ em.createQuery("DELETE FROM Car").executeUpdate();
+
+ // Skapa och persist 20 bilar med rimliga dagspriser
+ em.persist(createCar("Volvo", "XC90", 2025, "Lyxbil", 800_000));
+ em.persist(createCar("BMW", "7 Series", 2024, "Lyxbil", 1_000_000));
+ em.persist(createCar("Audi", "A8", 2023, "Lyxbil", 900_000));
+ em.persist(createCar("Toyota", "Corolla", 2022, "Personbil", 200_000));
+ em.persist(createCar("Honda", "Civic", 2021, "Personbil", 190_000));
+ em.persist(createCar("Ford", "Focus", 2022, "Personbil", 210_000));
+ em.persist(createCar("Mercedes", "Sprinter", 2023, "Minibuss", 350_000));
+ em.persist(createCar("Volkswagen", "Transporter", 2023, "Minibuss", 330_000));
+ em.persist(createCar("Renault", "Kangoo", 2022, "Minibuss", 300_000));
+ em.persist(createCar("Fiat", "500", 2023, "Småbil", 120_000));
+ em.persist(createCar("Mini", "Cooper", 2022, "Småbil", 150_000));
+ em.persist(createCar("Volkswagen", "Up!", 2022, "Småbil", 110_000));
+ em.persist(createCar("Porsche", "911", 2025, "Sportbil", 1_500_000));
+ em.persist(createCar("Ferrari", "Roma", 2024, "Sportbil", 2_000_000));
+ em.persist(createCar("Lamborghini", "Huracan", 2025, "Sportbil", 2_500_000));
+ em.persist(createCar("Tesla", "Model S", 2023, "Lyxbil", 900_000));
+ em.persist(createCar("Kia", "Rio", 2022, "Småbil", 130_000));
+ em.persist(createCar("Hyundai", "i30", 2023, "Personbil", 195_000));
+ em.persist(createCar("Opel", "Vivaro", 2022, "Minibuss", 320_000));
+ em.persist(createCar("Jaguar", "F-Type", 2024, "Sportbil", 1_600_000));
+
+ em.getTransaction().commit();
+ System.out.println("20 cars saved successfully!");
+ } catch (Exception e) {
+ if (em.getTransaction().isActive()) {
+ em.getTransaction().rollback();
+ }
+ System.err.println("Error seeding data: " + e.getMessage());
+ throw e;
+ }
+ } finally {
+ emf.close();
+ }
}🤖 Prompt for AI Agents
In src/main/java/org/example/App.java around lines 9 to 41, the EntityManager
and EntityManagerFactory are created and used without safe cleanup or rollback
on exceptions; wrap the lifecycle in proper try/catch/finally blocks so the
transaction is rolled back on any exception, the EntityManager is closed in a
finally block, and the EntityManagerFactory is closed in an outer finally block
(or after the try) to avoid leaks; also log or rethrow the caught exception
after rollback so failures are not swallowed.
| <property name="jakarta.persistence.jdbc.url" | ||
| value="jdbc:mysql://localhost:3306/carrental"/> | ||
| <property name="jakarta.persistence.jdbc.user" | ||
| value="root"/> | ||
| <property name="jakarta.persistence.jdbc.password" | ||
| value="abc-123-QWE"/> |
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CRITICAL: Remove hardcoded database credentials.
Database credentials are committed in plain text, exposing the password abc-123-QWE and username root. This is a critical security vulnerability.
🔎 Apply this diff to use environment variables or external configuration
- <property name="jakarta.persistence.jdbc.url"
- value="jdbc:mysql://localhost:3306/carrental"/>
- <property name="jakarta.persistence.jdbc.user"
- value="root"/>
- <property name="jakarta.persistence.jdbc.password"
- value="abc-123-QWE"/>
+ <property name="jakarta.persistence.jdbc.url"
+ value="${DB_URL:jdbc:mysql://localhost:3306/carrental}"/>
+ <property name="jakarta.persistence.jdbc.user"
+ value="${DB_USER}"/>
+ <property name="jakarta.persistence.jdbc.password"
+ value="${DB_PASSWORD}"/>Alternatively, use a separate configuration file (e.g., application.properties) that is not committed to version control and load properties programmatically in your application.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| <property name="jakarta.persistence.jdbc.url" | |
| value="jdbc:mysql://localhost:3306/carrental"/> | |
| <property name="jakarta.persistence.jdbc.user" | |
| value="root"/> | |
| <property name="jakarta.persistence.jdbc.password" | |
| value="abc-123-QWE"/> | |
| <property name="jakarta.persistence.jdbc.url" | |
| value="${DB_URL:jdbc:mysql://localhost:3306/carrental}"/> | |
| <property name="jakarta.persistence.jdbc.user" | |
| value="${DB_USER}"/> | |
| <property name="jakarta.persistence.jdbc.password" | |
| value="${DB_PASSWORD}"/> |
🤖 Prompt for AI Agents
In src/main/resources/META-INF/persistence.xml around lines 9 to 14, remove the
hardcoded JDBC username and password values (root / abc-123-QWE) and replace
them with values loaded from a secure external source: read them from
environment variables or an external, untracked configuration file (e.g.,
application.properties) and reference those placeholders (or system properties)
in persistence.xml; ensure the application fails fast with a clear error if the
env vars/config are missing, add the external config to .gitignore so
credentials are not committed, and update deployment/docs to instruct setting
the required environment variables.
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Actionable comments posted: 17
Fix all issues with AI Agents 🤖
In @src/main/java/org/example/config/JPAConfig.java:
- Around line 12-14: getEntityManager() leaks EntityManager instances because
callers may forget to close them; add a lifecycle-managing API in JPAConfig
(e.g., withEntityManager(Consumer<EntityManager>) and
withEntityManager(Function<EntityManager,T>)) that creates
emf.createEntityManager(), runs the consumer/function, and always closes the
EntityManager in a finally block (optionally begin/commit/rollback a transaction
if needed), or alternatively add Javadoc to getEntityManager() stating callers
must close the returned EntityManager; reference getEntityManager,
EntityManager, and emf when making the change.
In @src/main/java/org/example/controller/CarController.java:
- Around line 3-11: CarController currently defines six package-private boolean
fields (CarDamage, CarRented, CarAvailable, CarBooked, CarBroke, CarReturned)
using PascalCase and holding state in the controller; refactor by removing these
mutable fields from CarController, rename any remaining model fields to
camelCase, and move state to a proper model or enum (e.g., create a CarStatus
enum with AVAILABLE, RESERVED, RENTED, DAMAGED, BROKEN, RETURNED) on the Car
entity; make the controller stateless and delegate state changes to a service
(e.g., CarService methods) that operates on the Car entity with getters/setters
or immutable updates; ensure field visibility is private on the model and expose
state via methods (getStatus/setStatus or transitions) rather than controller
booleans.
In @src/main/java/org/example/controller/CustomerController.java:
- Around line 3-5: The addCustomer method signature is incomplete: update the
CustomerController interface's addCustomer to accept a customer payload (e.g.,
Customer or CustomerDTO) and return a clear type indicating the created resource
(e.g., Customer or int id). For example, change the signature from int
addCustomer() to a descriptive form such as Customer addCustomer(CustomerDTO
dto) or int addCustomer(Customer customer) and update any implementing classes
to accept the new parameter and return the clarified value; ensure imports and
model/DTO names (Customer, CustomerDTO) are used consistently across
implementations.
In @src/main/java/org/example/model/Booking.java:
- Around line 48-54: The Booking constructor assigns this.status and
this.createdAt but the fields are missing; add a field declaration for status of
type BookingStatus annotated with @Enumerated(EnumType.STRING) and add a
createdAt field of type LocalDateTime to the Booking class (e.g., near other
field declarations), so the constructor assignments compile and JPA persists the
enum as a string.
- Around line 17-23: The Booking entity has inconsistent access modifiers: the
customer field is package-private while car and other fields are private; change
the declaration of the customer field in the Booking class to private (i.e.,
make the field "private Customer customer;") and ensure any existing
getters/setters (e.g., getCustomer/setCustomer) remain consistent and are used
instead of direct field access.
- Around line 6-7: Remove the unused import javax.tools.DocumentationTool and
replace the incorrect javax.xml.stream.Location import with your domain model
Location import so the Booking entity uses the correct type; specifically, in
Booking.java delete the DocumentationTool import and change the Location import
to org.example.model.Location so the Location field/type references (the
Location used as a JPA entity in the Booking class) match your domain model.
- Around line 33-35: The Booking entity's extras field references java.util.List
and an Extra entity that are missing; add the import "import java.util.List;" to
Booking and create a new Extra entity class (e.g., public class Extra annotated
with @Entity in the same model package) defining an id and any needed fields and
mappings so Booking.extras (List<Extra>) compiles, or if Extra already exists
elsewhere, add the appropriate import for that class instead.
In @src/main/java/org/example/model/Car.java:
- Around line 14-19: The Car entity fields don't match the SQL schema: you must
ensure only one field maps to the DB column price_per_day (remove the duplicate
price or dailyPrice field, or consolidate them) and add a JPA mapping so the
entity field maps to price_per_day (use @Column(name = "price_per_day") on the
chosen field in class Car); also remove or mark as non-persistent the extra
fields year and type (either delete them or annotate with @Transient) and update
the corresponding getters/setters to match the retained field names so JPA
column mapping and accessor names align with the schema.
- Line 1: Change the package declaration in Car.java from "package org.example;"
to "package org.example.model;" so the class Car aligns with its directory and
sibling classes (Payment, Booking, Customer, BookingStatus); after updating the
Car class package, update the persistence unit registration that references the
entity class from "org.example.Car" to "org.example.model.Car" (e.g., in
persistence.xml) so the JPA configuration points to the correct fully qualified
class name.
In @src/main/java/org/example/model/Customer.java:
- Line 20: The Customer class is missing standard getters and setters for its
private fields; implement public accessor and mutator methods for every private
field declared in the Customer class (e.g., getX/setX for each field) so JPA and
other code can read and modify entity state; add them as ordinary public methods
inside the Customer class (matching field names and types) ensuring any
annotated fields (e.g., @Id or @Column) remain unchanged and follow JavaBean
naming conventions.
- Around line 10-12: The Customer entity's id field uses @GeneratedValue without
an explicit strategy; update the annotation on the id field in class Customer to
specify GenerationType.IDENTITY (i.e., replace or augment @GeneratedValue with
@GeneratedValue(strategy = GenerationType.IDENTITY)) so the id generation
matches Car and Booking and behaves consistently across DB providers. Ensure the
import for GenerationType is added if missing.
In @src/main/java/org/example/model/Payment.java:
- Around line 5-7: The Payment JPA entity is missing a primary key; add a field
annotated with @Id (e.g., private Long id) and annotate it with
@GeneratedValue(strategy = GenerationType.IDENTITY) to serve as the primary key,
then add basic fields used by Booking (e.g., amount, status, createdAt) with
appropriate types and JPA annotations; ensure the Payment class imports
jakarta.persistence.* and java.time.LocalDateTime and that getters/setters (or
Lombok annotations) are present so the @OneToOne relationship from Booking to
Payment can initialize correctly.
In @src/main/java/org/example/repository/CarRepository.java:
- Around line 11-20: The findAll method opens an EntityManager via
JPAUtil.getEntityManager() but closes it only after the query, which can leak
the EntityManager if an exception is thrown; change the implementation of
findAll to obtain the EntityManager in a try-with-resources (or try-finally)
block so the EntityManager is always closed when exiting the method, wrap the
em.createQuery(...).getResultList() call inside that block, and return the
resulting List<Car> from within the scope that guarantees cleanup.
In @src/main/java/org/example/repository/CustomerRepository.java:
- Around line 3-4: The CustomerRepository class is an empty skeleton; implement
basic CRUD methods to match CarRepository style: add methods findById(Long id),
findAll(), findByEmail(String email), save(Customer customer), and delete(Long
id). Use the same data-access pattern as CarRepository (e.g., same underlying
data source or DAO) and ensure method signatures and return types align with the
Customer entity (Optional<Customer> for findById/findByEmail, List<Customer> for
findAll, Customer for save, void or boolean for delete). Wire any required
dependencies (e.g., a JdbcTemplate/EntityManager/DAO instance) into the
CustomerRepository constructor or fields and implement each method to delegate
to that dependency following existing patterns in CarRepository.
In @src/main/resources/css/main.css:
- Around line 1-3: The file main.css currently contains Swedish placeholder text
("tabell med bilar", "uthyrnings tabell med many2man", "kund tabell") which is
invalid CSS and will break the stylesheet; either replace these lines with real
CSS rules (add selectors and property:value pairs for the intended UI tables) or
remove the placeholder content and move the notes to a documentation file (e.g.,
README or a design doc). Locate the file named main.css and delete or replace
the three placeholder lines with valid CSS syntax for the affected components
(or move the text into a non-CSS doc) so the stylesheet parses properly.
In @src/main/resources/init.sql:
- Around line 44-59: The DB schema defines a many-to-many join table booking_car
but the JPA Booking entity declares a @ManyToOne to Car (field name car),
causing a mismatch; either update the Booking entity to model a many-to-many
(replace the @ManyToOne car field with a collection annotated @ManyToMany and
@JoinTable pointing at booking_car) or change the SQL schema to match the
current entity (add car_id column and foreign key to the booking table and
remove the booking_car join table); locate the Booking class
(org.example.model.Booking) and the booking_car SQL DDL to apply the
corresponding change so the JPA mapping and database schema align.
♻️ Duplicate comments (1)
src/main/java/org/example/App.java (1)
9-41: Resource management and error handling issues already flagged.Previous review comments have identified critical resource leak and transaction rollback issues in this code segment. Ensure these are addressed as indicated in the past review feedback.
🧹 Nitpick comments (6)
src/main/java/org/example/model/Car.java (1)
8-21: Add explicit no-arg constructor for JPA.While Java provides a default no-arg constructor, it's a best practice to explicitly declare it for JPA entities. This makes the JPA requirement clear and prevents issues if you later add other constructors.
🔎 Proposed addition
@Entity public class Car { + + protected Car() { + // Required by JPA + } + @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id;src/main/resources/fxml/main_view.fxml (1)
6-10: Consider adding controller binding.The FXML file is syntactically correct. As you develop the UI, you may want to bind this view to
MainViewControllerby adding anfx:controllerattribute to the root element.Example:
<BorderPane xmlns:fx="http://javafx.com/fxml" fx:controller="org.example.controller.MainViewController">src/main/java/org/example/controller/BookingController.java (1)
3-4: LGTM - Scaffolding class.This empty controller is part of the initial project scaffolding. Consider adding a TODO comment or basic method stubs to track planned implementation.
src/main/java/org/example/service/CustomerService.java (1)
3-4: LGTM - Scaffolding class.This empty service class is consistent with the scaffolding pattern across the PR. When implementing, consider adding a
CustomerRepositorydependency for data access operations.src/main/java/org/example/service/CarService.java (1)
3-4: LGTM - Scaffolding class.This empty service class is part of the initial scaffolding. When implementing, you can leverage the existing
CarRepositorywhich already has afindAll()method defined.src/main/java/org/example/controller/MainViewController.java (1)
3-4: Empty placeholder class.This controller has no fields, methods, or functionality. While acceptable as initial scaffolding, ensure this gets implemented before merging to avoid dead code in the main branch.
Would you like me to generate a basic controller structure with typical JavaFX initialization methods?
📜 Review details
Configuration used: defaults
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (25)
pom.xmlsrc/main/java/org/example/App.javasrc/main/java/org/example/config/JPAConfig.javasrc/main/java/org/example/controller/BookingController.javasrc/main/java/org/example/controller/CarController.javasrc/main/java/org/example/controller/CustomerController.javasrc/main/java/org/example/controller/MainViewController.javasrc/main/java/org/example/model/Booking.javasrc/main/java/org/example/model/BookingStatus.javasrc/main/java/org/example/model/Car.javasrc/main/java/org/example/model/Customer.javasrc/main/java/org/example/model/Payment.javasrc/main/java/org/example/repository/BookingRepository.javasrc/main/java/org/example/repository/CarRepository.javasrc/main/java/org/example/repository/CustomerRepository.javasrc/main/java/org/example/service/BookingService.javasrc/main/java/org/example/service/CarService.javasrc/main/java/org/example/service/CustomerService.javasrc/main/resources/META-INF/persistence.xmlsrc/main/resources/css/main.csssrc/main/resources/fxml/booking_view.fxmlsrc/main/resources/fxml/car_view.fxmlsrc/main/resources/fxml/customer_view.fxmlsrc/main/resources/fxml/main_view.fxmlsrc/main/resources/init.sql
✅ Files skipped from review due to trivial changes (2)
- src/main/java/org/example/repository/BookingRepository.java
- src/main/java/org/example/service/BookingService.java
🚧 Files skipped from review as they are similar to previous changes (1)
- src/main/resources/META-INF/persistence.xml
🧰 Additional context used
🧬 Code graph analysis (3)
src/main/java/org/example/model/Payment.java (2)
src/main/java/org/example/model/Booking.java (1)
Entity(11-58)src/main/java/org/example/model/Car.java (1)
Entity(8-41)
src/main/java/org/example/model/Car.java (3)
src/main/java/org/example/model/Booking.java (1)
Entity(11-58)src/main/java/org/example/model/Payment.java (1)
Entity(5-7)src/main/java/org/example/model/Customer.java (1)
Entity(7-21)
src/main/java/org/example/model/Booking.java (3)
src/main/java/org/example/model/Car.java (1)
Entity(8-41)src/main/java/org/example/model/Payment.java (1)
Entity(5-7)src/main/java/org/example/model/Customer.java (1)
Entity(7-21)
🪛 Biome (2.1.2)
src/main/resources/css/main.css
[error] 3-3: Expected a compound selector but instead found the end of the file.
Expected a compound selector here.
(parse)
[error] 1-1: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 1-1: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 1-1: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 1-2: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 2-2: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 2-2: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 2-2: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 2-3: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
[error] 3-3: Unknown type selector is not allowed.
See MDN web docs for more details.
Consider replacing the unknown type selector with valid one.
(lint/correctness/noUnknownTypeSelector)
🔇 Additional comments (5)
pom.xml (2)
37-52: All library versions are valid and secure for production use.The specified versions have been verified in Maven Central Repository:
- hibernate-core 7.2.0.Final: Valid, no known CVEs
- mysql-connector-j 9.5.0: Valid, secure (not affected by CVE-2025-30706 which impacts 9.0.0–9.2.0)
- classgraph 4.8.184: Valid, not vulnerable (CVE-2021-47621 was fixed in 4.8.112; this version is current and secure)
All dependencies are appropriate for production use.
12-12: Java 25 is a non-LTS release; confirm this version choice is intentional.Java 25 was released in September 2025 and is available. However, it is not a long-term support (LTS) version—it will only receive support until March 2026 (6-month support window). Consider whether targeting a non-LTS version is appropriate for this project. If long-term stability is needed, use Java 21 (LTS) instead, or wait for Java 27 (next LTS in September 2026).
src/main/java/org/example/model/BookingStatus.java (1)
3-8: LGTM!The enum defines a clear set of booking states that cover the expected lifecycle: reservation, activation, completion, and cancellation.
src/main/java/org/example/App.java (1)
47-58: LGTM - Helper method correctly calculates daily price.The
createCarhelper method appropriately constructs Car instances and calculates the daily rental price as 0.5% of the purchase price, which provides a reasonable basis for rental pricing.src/main/java/org/example/model/Booking.java (1)
33-35: Verify @onetomany with @joincolumn on extras relationship.The
@OneToManyrelationship with@JoinColumn(name = "booking_id")on theextrasfield is an unusual pattern. Typically,@OneToManyuses either:
mappedByto reference the inverse@ManyToOnefield in theExtraentity, or- A join table (default behavior without mappedBy)
Using
@JoinColumnhere means the foreign key will be in theExtratable, but withoutmappedBy, JPA may not recognize this as a bidirectional relationship. Verify this is the intended mapping and ensure theExtraentity has a correspondingBookingreference if this should be bidirectional.
| public static EntityManager getEntityManager() { | ||
| return emf.createEntityManager(); | ||
| } |
There was a problem hiding this comment.
EntityManager resource leak: Add documentation or refactor to track lifecycle.
The getEntityManager() method creates new EntityManager instances but provides no mechanism to close them. Each caller must remember to close the returned EntityManager to avoid resource leaks. Consider either:
- Documenting that callers must close the returned EntityManager in a try-with-resources block, or
- Refactoring to a higher-level method that accepts a function/consumer and handles the EntityManager lifecycle internally.
🔎 Refactor option: Provide a method that manages EntityManager lifecycle
+public static void executeInTransaction(java.util.function.Consumer<EntityManager> operation) {
+ EntityManager em = emf.createEntityManager();
+ try {
+ em.getTransaction().begin();
+ operation.accept(em);
+ em.getTransaction().commit();
+ } catch (Exception e) {
+ if (em.getTransaction().isActive()) {
+ em.getTransaction().rollback();
+ }
+ throw e;
+ } finally {
+ em.close();
+ }
+}🤖 Prompt for AI Agents
In @src/main/java/org/example/config/JPAConfig.java around lines 12-14,
getEntityManager() leaks EntityManager instances because callers may forget to
close them; add a lifecycle-managing API in JPAConfig (e.g.,
withEntityManager(Consumer<EntityManager>) and
withEntityManager(Function<EntityManager,T>)) that creates
emf.createEntityManager(), runs the consumer/function, and always closes the
EntityManager in a finally block (optionally begin/commit/rollback a transaction
if needed), or alternatively add Javadoc to getEntityManager() stating callers
must close the returned EntityManager; reference getEntityManager,
EntityManager, and emf when making the change.
| public interface CustomerController { | ||
| int addCustomer(); | ||
| } |
There was a problem hiding this comment.
Method signature is incomplete and unclear.
The addCustomer() method has several issues:
- No parameters to pass customer data (name, email, phone, etc.)
- Return type
intis ambiguous - does it represent a customer ID, success status, or row count? - For a controller interface, consider a signature like
int addCustomer(Customer customer)orCustomer addCustomer(CustomerDTO dto)to clarify intent
🔎 Suggested method signature improvements
public interface CustomerController {
- int addCustomer();
+ // Option 1: Return generated customer ID
+ int addCustomer(String name, String email, String phone);
+
+ // Option 2: Return the created customer entity
+ Customer addCustomer(Customer customer);
+
+ // Option 3: Use a DTO for better separation of concerns
+ Customer addCustomer(CustomerDTO customerData);
}Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In @src/main/java/org/example/controller/CustomerController.java around lines
3-5, The addCustomer method signature is incomplete: update the
CustomerController interface's addCustomer to accept a customer payload (e.g.,
Customer or CustomerDTO) and return a clear type indicating the created resource
(e.g., Customer or int id). For example, change the signature from int
addCustomer() to a descriptive form such as Customer addCustomer(CustomerDTO
dto) or int addCustomer(Customer customer) and update any implementing classes
to accept the new parameter and return the clarified value; ensure imports and
model/DTO names (Customer, CustomerDTO) are used consistently across
implementations.
| public class CustomerRepository { | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion | 🟠 Major
Incomplete repository implementation.
This repository class is currently an empty skeleton with no data access methods. Unlike CarRepository which implements findAll(), this class provides no functionality for accessing Customer entities.
Consider implementing common data access methods such as:
findById(Long id)findAll()findByEmail(String email)(since email is unique in the schema)save(Customer customer)delete(Long id)
Would you like me to generate a basic implementation with these methods?
🤖 Prompt for AI Agents
In @src/main/java/org/example/repository/CustomerRepository.java around lines
3-4, The CustomerRepository class is an empty skeleton; implement basic CRUD
methods to match CarRepository style: add methods findById(Long id), findAll(),
findByEmail(String email), save(Customer customer), and delete(Long id). Use the
same data-access pattern as CarRepository (e.g., same underlying data source or
DAO) and ensure method signatures and return types align with the Customer
entity (Optional<Customer> for findById/findByEmail, List<Customer> for findAll,
Customer for save, void or boolean for delete). Wire any required dependencies
(e.g., a JdbcTemplate/EntityManager/DAO instance) into the CustomerRepository
constructor or fields and implement each method to delegate to that dependency
following existing patterns in CarRepository.
src/main/resources/init.sql
Outdated
| CREATE TABLE car ( | ||
| id BIGINT AUTO_INCREMENT PRIMARY KEY, | ||
| brand VARCHAR(100) NOT NULL, | ||
| model VARCHAR(100) NOT NULL, | ||
| price_per_day DOUBLE NOT NULL | ||
| ); |
There was a problem hiding this comment.
Critical: Car table schema doesn't match Car entity fields.
The SQL car table defines columns id, brand, model, and price_per_day, but the Car.java entity declares additional fields (year, type, price, dailyPrice) without corresponding columns in the database schema. Additionally, there's a naming mismatch:
- SQL has:
price_per_day - Entity has:
priceanddailyPrice(two separate fields)
Without proper @Column annotations, JPA will look for columns named exactly as the Java field names, causing mapping failures.
🔎 Option 1: Update SQL schema to match entity
CREATE TABLE car (
id BIGINT AUTO_INCREMENT PRIMARY KEY,
brand VARCHAR(100) NOT NULL,
model VARCHAR(100) NOT NULL,
year INT,
type VARCHAR(50),
price DOUBLE NOT NULL,
daily_price DOUBLE NOT NULL
);🔎 Option 2: Update entity with @column annotations and remove extra fields
// In Car.java, remove year, type, and price fields, and add:
@Column(name = "price_per_day")
private double dailyPrice;
src/main/resources/init.sql
Outdated
| CREATE TABLE booking_car ( | ||
| booking_id BIGINT NOT NULL, | ||
| car_id BIGINT NOT NULL, | ||
|
|
||
| PRIMARY KEY (booking_id, car_id), | ||
|
|
||
| CONSTRAINT fk_bookingcar_booking | ||
| FOREIGN KEY (booking_id) | ||
| REFERENCES booking(id) | ||
| ON DELETE CASCADE, | ||
|
|
||
| CONSTRAINT fk_bookingcar_car | ||
| FOREIGN KEY (car_id) | ||
| REFERENCES car(id) | ||
| ON DELETE CASCADE | ||
| ); |
There was a problem hiding this comment.
Critical: Schema-entity relationship mismatch (Booking ↔ Car).
The SQL schema implements a many-to-many relationship between booking and car via the booking_car join table. However, the Booking JPA entity (src/main/java/org/example/model/Booking.java) declares a @ManyToOne relationship with Car:
@ManyToOne(optional = false)
@JoinColumn(name = "car_id")
private Car car;This is a critical mismatch that will cause runtime failures:
- The SQL schema expects a join table (
booking_car) for many-to-many relationships - The JPA entity expects a foreign key column (
car_id) directly in thebookingtable - The
bookingtable in SQL does not have acar_idcolumn
You must align the schema with the entity model or vice versa.
🔎 Option 1: Update Booking entity to use @manytomany
@ManyToMany
@JoinTable(
name = "booking_car",
joinColumns = @JoinColumn(name = "booking_id"),
inverseJoinColumns = @JoinColumn(name = "car_id")
)
private List<Car> cars = new ArrayList<>();🔎 Option 2: Update SQL to match @manytoone
-- Add car_id to booking table
ALTER TABLE booking ADD COLUMN car_id BIGINT NOT NULL;
ALTER TABLE booking ADD CONSTRAINT fk_booking_car
FOREIGN KEY (car_id) REFERENCES car(id) ON DELETE CASCADE;
-- Remove the booking_car join table
DROP TABLE booking_car;🤖 Prompt for AI Agents
In @src/main/resources/init.sql around lines 44-59, The DB schema defines a
many-to-many join table booking_car but the JPA Booking entity declares a
@ManyToOne to Car (field name car), causing a mismatch; either update the
Booking entity to model a many-to-many (replace the @ManyToOne car field with a
collection annotated @ManyToMany and @JoinTable pointing at booking_car) or
change the SQL schema to match the current entity (add car_id column and foreign
key to the booking table and remove the booking_car join table); locate the
Booking class (org.example.model.Booking) and the booking_car SQL DDL to apply
the corresponding change so the JPA mapping and database schema align.
There was a problem hiding this comment.
Actionable comments posted: 19
Note
Due to the large number of review comments, Critical, Major severity comments were prioritized as inline comments.
🤖 Fix all issues with AI agents
In @pom.xml:
- Around line 51-58: The POM currently only declares junit-jupiter-api which
lacks the TestEngine, so Maven Surefire can't run tests; update the dependencies
to either add a test-scoped dependency with artifactId junit-jupiter-engine
(groupId org.junit.jupiter, version 5.10.1) or replace the existing
junit-jupiter-api entry with the junit-jupiter aggregator (artifactId
junit-jupiter) so the engine is included on the test classpath; ensure the new
dependency uses <scope>test</scope> to match the other test deps.
- Around line 71-105: The Maven shade config uses AppendingTransformer for
META-INF/persistence.xml which concatenates XML and yields invalid duplicate
<persistence-unit> entries; replace the transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"
for the resource META-INF/persistence.xml with
implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer"
so the persistence XML is merged correctly, and also remove or guard against
shading JavaFX native libs: stop producing a single cross-platform shaded JAR
for JavaFX (maven-shade-plugin) and instead switch to using
javafx-maven-plugin's jlink/jpackage workflows (or document platform-specific
classifiers) to build platform-specific runtime images that include JavaFX
natives.
In @src/main/java/org/example/App.java:
- Around line 36-43: The DB seeding can leave an active transaction open if
DataInitializer.seed(em) throws; make the seeding transaction-safe by ensuring
rollback on exceptions. Fix option A (preferred): update
DataInitializer.seed(EntityManager) to begin a transaction, try to perform
seeding, commit on success, and in catch check tx.isActive() then tx.rollback()
before rethrowing; ensure the method never leaves a transaction active. Option B
(if changing seed is undesirable): in initDatabase() obtain the
EntityTransaction from the EntityManager, begin the transaction before calling
DataInitializer.seed(em), commit if no exception, and in the catch block
rollback the transaction if active, then rethrow or log, finally closing the
EntityManager; reference methods: initDatabase, DataInitializer.seed,
EntityManager.getTransaction(), EntityTransaction.rollback()/commit().
- Around line 14-34: In start(Stage stage) ensure resources are validated before
use: check the results of App.class.getResource("/fxml/main_view.fxml") and
App.class.getResource("/css/main.css") for null and handle missing resources by
showing a JavaFX Alert (or logging) and calling Platform.exit() so the app fails
fast instead of allowing a NullPointerException; update the FXMLLoader
instantiation (used in start), the scene creation, and the
scene.getStylesheets().add call to only proceed if both resources are non-null
and provide a clear error message to the user when exiting.
In @src/main/java/org/example/controller/BookingController.java:
- Around line 37-52: The controller's updatePriceDisplay uses
Booking.getDurationInDays() directly causing UI to show 0 days while
BookingService.calculateTotalPrice() clamps to at least 1; modify
updatePriceDisplay to apply the same clamp: compute long days =
tempBooking.getDurationInDays(); long clampedDays = Math.max(1, days); then use
clampedDays for daysLabel, for calculating carPriceLabel
(selectedCar.getDailyPrice() * clampedDays) and for any displayed totals so the
UI matches BookingService.calculateTotalPrice(); keep all existing null checks
and use clampedDays wherever the display currently uses days.
In @src/main/java/org/example/controller/CustomerController.java:
- Around line 10-16: The FXML's fx:controller is pointing to
com.example.crm.HelloController which prevents javafx from injecting the @FXML
fields (firstNameField, lastNameField, emailField) in
org.example.controller.CustomerController; update the fx:controller attribute in
customer_view.fxml to "org.example.controller.CustomerController", confirm the
CustomerController class and its @FXML field names match the FXML IDs, and
rebuild so the fields are injected at runtime to avoid NPEs when calling
getText().
In @src/main/java/org/example/model/Booking.java:
- Around line 8-33: The Booking JPA entity is missing a no-argument constructor
which will break runtime instantiation; add a protected no-arg constructor to
the Booking class (in addition to the existing parameterized constructor) that
initializes mutable fields (e.g., extras = new ArrayList<>(), and optionally
status default) so Hibernate can create the entity and fields are in a valid
state; ensure the constructor has protected visibility (not private) to satisfy
JPA.
In @src/main/java/org/example/model/Location.java:
- Around line 5-23: The Location entity allows persisting null/blank names; add
a DB constraint and runtime guards by annotating the name field with a column
constraint (e.g., @Column(nullable = false, length = <appropriate>) and
optionally @NotBlank) and enforce validation in the public constructor
Location(String name) and in setName(String name) to trim the input and throw
IllegalArgumentException when name is null or blank (or exceeds length),
ensuring the entity cannot be created or updated with invalid names.
In @src/main/java/org/example/repository/CarRepository.java:
- Around line 23-35: The save method in CarRepository (save(Car car)) starts a
transaction but does not roll back on failure; wrap the transactional work in a
try-catch around em.getTransaction().commit() and on any Exception call
em.getTransaction().rollback() if the transaction is active, rethrow or wrap the
exception, and still ensure em.close() in the finally block so failed commits do
not leave transactions open.
In @src/main/java/org/example/repository/CustomerRepository.java:
- Around line 12-25: CustomerRepository.save currently begins a transaction but
only commits and closes the EntityManager in a finally block, so if
persist/merge/commit throws it never rolls back; update the save method
(CustomerRepository.save) to catch Throwable/Exception, check if
em.getTransaction().isActive() then call em.getTransaction().rollback(), rethrow
the exception after rollback, and ensure em.close() still runs in finally; use
the same rollback pattern as in BookingRepository.save and reference
JPAUtil.getEntityManager to locate the EntityManager creation.
In @src/main/java/org/example/util/DataInitializer.java:
- Around line 8-52: The seed(EntityManager em) method currently queries all Car
entities and aborts seeding (thereby also skipping Extras) if any cars exist,
and it performs persistence without transaction rollback; change the car
existence check to a COUNT query (e.g., "SELECT COUNT(c) FROM Car c") for
efficiency, wrap the em.getTransaction().begin()/commit() block in a try/catch
that calls em.getTransaction().rollback() on exception, and decide whether
Extras should be seeded independently—either move Extra persists to run when
carCount > 0 is false or separate Extras seeding so extras are inserted
regardless of car existence, updating the method accordingly and removing any
unnecessary null checks around getSingleResult().
In @src/main/resources/css/main.css:
- Around line 10-13: The CSS rule .logo-text uses an unsupported property
-fx-margin-bottom which JavaFX will ignore; remove that property from the
.logo-text selector and instead add spacing via layout APIs: set a margin on the
node's parent (e.g., call VBox.setMargin(yourLogoNode, new Insets(0,0,10,0)) in
Java or add <VBox.margin><Insets bottom="10.0"/></VBox.margin> in FXML) or, if
the control supports internal spacing, replace with a supported property like
-fx-padding on .logo-text.
In @src/main/resources/fxml/booking_view.fxml:
- Around line 7-70: The extrasContainer VBox is declared in FXML but not wired
into BookingController and extras are not accounted for in pricing; add an @FXML
private VBox extrasContainer field to BookingController, then in initialize()
dynamically create a CheckBox for each extra (or populate from your extras
list/source), add a ChangeListener/selectedProperty listener on each CheckBox
that calls updatePriceDisplay(), and modify updatePriceDisplay() to sum the
prices of all selected extras (by iterating extrasContainer.getChildren() or a
maintained list of CheckBoxes) and include that extras sum in the displayed
carPriceLabel/totalAmountLabel calculations.
In @src/main/resources/fxml/customer_view.fxml:
- Around line 9-18: The FXML references a non-existent controller class via
fx:controller="com.example.crm.HelloController", causing runtime failure; change
the fx:controller value to the actual controller class
org.example.controller.CustomerController so the FXML can wire the @FXML fields
(firstNameField, lastNameField, emailField) and the handler method
handleAddCustomer() correctly.
In @src/main/resources/META-INF/persistence.xml:
- Around line 18-30: The persistence.xml currently hardcodes a root/empty DB
user (properties jakarta.persistence.jdbc.user and
jakarta.persistence.jdbc.password) which must be removed from VCS; update
persistence.xml to use externalized placeholders (e.g. ${DB_USER},
${DB_PASSWORD}, ${JDBC_URL}) or a JNDI datasource reference and wire those
values from environment variables, Maven profiles, or application config at
runtime, and replace the root account with a non-root DB user; ensure the code
that bootstraps JPA reads the externalized values (or uses the configured
DataSource) instead of the hardcoded properties.
- Around line 26-30: The persistence.xml currently sets
hibernate.hbm2ddl.auto="update", which is unsafe for production; change this to
use environment-specific values (e.g., keep "update" or "create-drop" for
development but set hibernate.hbm2ddl.auto to "validate" or "none" in
production) and drive the value from an environment variable or profile so
production uses migrations (Flyway/Liquibase) instead of automatic updates;
ensure the property name "hibernate.hbm2ddl.auto" is updated accordingly and
document that schema changes must be applied via versioned migration scripts
rather than relying on the "update" setting.
🟡 Minor comments (5)
src/main/resources/fxml/car_view.fxml-14-40 (1)
14-40: Wire or remove dead UI controls (search field and "Visa Detaljer" button).The search field is declared in the controller but never used—no listener, no filtering logic. The "Visa Detaljer" button has no handler method. Both controls create a broken UX experience. Either implement the functionality or remove/disable these controls.
src/main/java/org/example/controller/CarController.java-53-60 (1)
53-60: Add UI feedback when booking cannot start (no selection or car unavailable/damaged).The "Boka Vald Bil" button is always enabled and the method silently does nothing when the selected car is null, unavailable, or damaged. Show an error dialog (e.g., "Välj en tillgänglig bil") or disable the button when no valid car is selected. The codebase already has a pattern for this in
BookingController(seeshowError()method).src/main/java/org/example/service/CustomerService.java-12-20 (1)
12-20: The unique constraint onCustomer.emailalready exists in the database schema, but the code lacks exception handling for constraint violations.The
init.sqlalready definesemail VARCHAR(150) UNIQUE NOT NULL, so duplicate emails are enforced at the database level. However, thesave()method inCustomerRepositorydoesn't catchPersistenceExceptionor constraint violation exceptions. If a duplicate email somehow reaches the database (e.g., via concurrent requests or direct repository calls), the transaction will fail with an unhandled exception instead of gracefully returning an error to the caller.Remove the redundant
findByEmail()check and instead wrap thesave()call in a try-catch to handlePersistenceException, then propagate a meaningful result (throw a custom exception or return a status) for the caller to handle properly.src/main/java/org/example/model/Car.java-33-45 (1)
33-45: Small mismatch: comment says “Setters” but only availability/damage are settable. Either expand setters (if needed) or tweak the comment to reflect intended immutability of other fields.src/main/java/org/example/model/Customer.java-67-70 (1)
67-70: Avoid leaking email viatoString()(often ends up in logs/UI unexpectedly).Proposed fix
@Override public String toString() { - return firstName + " " + lastName + " (" + email + ")"; + return firstName + " " + lastName; }
🧹 Nitpick comments (11)
src/main/java/org/example/App.java (1)
45-49: Callsuper.stop()(safe default) and keep shutdown idempotent.
Not required, but generally safer to callsuper.stop()before/afterJPAUtil.shutdown().src/main/java/org/example/repository/CustomerRepository.java (1)
27-33: Validate/normalize email inputs before querying.
Ifnull/ blank (or has casing/whitespace differences), behavior may be surprising; consider guarding in service/controller and optionally normalizing (e.g., trim + lower-case) consistently.src/main/java/org/example/repository/BookingRepository.java (1)
10-19: Optional: return the managed entity fromsave()(merge returns a new instance).
Callers sometimes need the managed/updated instance (esp. aftermerge).src/main/java/org/example/util/JPAUtil.java (1)
7-24: MakeJPAUtila proper utility class (private ctor) and simplify shutdown.
emfisfinal, so the null-check is unnecessary; also prevent instantiation.Proposed fix
public class JPAUtil { private static final EntityManagerFactory emf = Persistence.createEntityManagerFactory("carRentalPU"); + private JPAUtil() {} + public static EntityManagerFactory getEntityManagerFactory() { return emf; } @@ public static void shutdown() { - if (emf != null && emf.isOpen()) { + if (emf.isOpen()) { emf.close(); } } }src/main/java/org/example/model/Extra.java (2)
7-30: UseBigDecimal(or integer minor units) for money to avoid rounding errors.
Right nowpriceis adouble, andBookingService.calculateTotalPrice()sums these values—this can accumulate floating-point drift. ConsiderBigDecimal(orlongcents/öre) end-to-end.
14-30: Add basic invariants + accessors (and considerequals/hashCode) for stable JPA behavior.
At minimum: enforce non-nullname, non-negativeprice, and consider exposinggetId()+setName(...). For ManyToMany collections, considerSet<Booking>+equals/hashCodebased on immutable business key (oridonce assigned) to reduce duplicate association risk.src/main/java/org/example/service/CustomerService.java (1)
12-20: Return a result / throw a domain exception instead ofSystem.out.println.
Callers (controllers) likely need to react (UI message, highlight field, etc.). Consider returningboolean created, or throwing something likeDuplicateCustomerException. Also trim/normalize email before lookup.src/main/java/org/example/controller/CarController.java (1)
28-46:searchFieldis unused; either implement filtering or remove injection.
As-is it’s misleading (especially since FXML provides it). If you keep it, add a listener to filter the table items.src/main/java/org/example/service/CarService.java (1)
19-28: Prevent impossible states (damaged == true&&available == true).
Either guard inupdateCarStatus(don’t allow available if damaged) or make a dedicated “repair” flow that clears damaged before availability can be set.src/main/java/org/example/model/Customer.java (1)
18-21: Clarify lifecycle semantics forCustomer.bookings(cascade/orphanRemoval). If bookings are created/removed through the customer aggregate, you likely wantcascade = CascadeType.ALLand maybeorphanRemoval = true; otherwise leaving it as-is is fine—just confirm intent.Also applies to: 62-64
src/main/java/org/example/model/Booking.java (1)
39-42: Consider guarding against invalid date ranges (negative duration) and define inclusive/exclusive semantics.
📜 Review details
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Plan: Pro
📒 Files selected for processing (27)
pom.xmlsrc/main/java/org/example/App.javasrc/main/java/org/example/Main.javasrc/main/java/org/example/controller/BookingController.javasrc/main/java/org/example/controller/CarController.javasrc/main/java/org/example/controller/CustomerController.javasrc/main/java/org/example/controller/MainViewController.javasrc/main/java/org/example/model/Booking.javasrc/main/java/org/example/model/Car.javasrc/main/java/org/example/model/CarType.javasrc/main/java/org/example/model/Customer.javasrc/main/java/org/example/model/Extra.javasrc/main/java/org/example/model/Location.javasrc/main/java/org/example/repository/BookingRepository.javasrc/main/java/org/example/repository/CarRepository.javasrc/main/java/org/example/repository/CustomerRepository.javasrc/main/java/org/example/service/BookingService.javasrc/main/java/org/example/service/CarService.javasrc/main/java/org/example/service/CustomerService.javasrc/main/java/org/example/util/DataInitializer.javasrc/main/java/org/example/util/JPAUtil.javasrc/main/resources/META-INF/persistence.xmlsrc/main/resources/css/main.csssrc/main/resources/fxml/booking_view.fxmlsrc/main/resources/fxml/car_view.fxmlsrc/main/resources/fxml/customer_view.fxmlsrc/main/resources/fxml/main_view.fxml
🚧 Files skipped from review as they are similar to previous changes (2)
- src/main/resources/fxml/main_view.fxml
- src/main/java/org/example/controller/MainViewController.java
🧰 Additional context used
🧬 Code graph analysis (11)
src/main/java/org/example/App.java (2)
src/main/java/org/example/util/DataInitializer.java (1)
DataInitializer(6-53)src/main/java/org/example/util/JPAUtil.java (1)
JPAUtil(7-24)
src/main/java/org/example/controller/CarController.java (1)
src/main/java/org/example/service/CarService.java (1)
CarService(7-29)
src/main/java/org/example/repository/BookingRepository.java (1)
src/main/java/org/example/util/JPAUtil.java (1)
JPAUtil(7-24)
src/main/java/org/example/model/Customer.java (3)
src/main/java/org/example/model/Booking.java (1)
Entity(8-52)src/main/java/org/example/model/Car.java (1)
Entity(7-51)src/main/java/org/example/model/Extra.java (1)
Entity(7-30)
src/main/java/org/example/service/CarService.java (1)
src/main/java/org/example/repository/CarRepository.java (1)
CarRepository(8-37)
src/main/java/org/example/service/BookingService.java (2)
src/main/java/org/example/repository/BookingRepository.java (1)
BookingRepository(8-33)src/main/java/org/example/repository/CarRepository.java (1)
CarRepository(8-37)
src/main/java/org/example/repository/CarRepository.java (1)
src/main/java/org/example/util/JPAUtil.java (1)
JPAUtil(7-24)
src/main/java/org/example/Main.java (1)
src/main/java/org/example/App.java (1)
App(11-54)
src/main/java/org/example/controller/CustomerController.java (1)
src/main/java/org/example/service/CustomerService.java (1)
CustomerService(8-29)
src/main/java/org/example/model/Car.java (3)
src/main/java/org/example/model/Booking.java (1)
Entity(8-52)src/main/java/org/example/model/Customer.java (1)
Entity(7-71)src/main/java/org/example/model/Extra.java (1)
Entity(7-30)
src/main/java/org/example/service/CustomerService.java (1)
src/main/java/org/example/repository/CustomerRepository.java (1)
CustomerRepository(10-41)
🪛 Biome (2.1.2)
src/main/resources/css/main.css
[error] 3-3: Unknown property is not allowed.
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[error] 17-17: Unknown property is not allowed.
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[error] 18-18: Unknown property is not allowed.
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[error] 19-19: Unknown property is not allowed.
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[error] 20-20: Unknown property is not allowed.
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[error] 21-21: Unknown property is not allowed.
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[error] 22-22: Unknown property is not allowed.
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[error] 26-26: Unknown property is not allowed.
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[error] 27-27: Unknown property is not allowed.
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[error] 31-31: Unknown property is not allowed.
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[error] 32-32: Unknown property is not allowed.
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[error] 33-33: Unknown property is not allowed.
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[error] 37-37: Unknown property is not allowed.
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[error] 38-38: Unknown property is not allowed.
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[error] 42-42: Unknown property is not allowed.
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[error] 43-43: Unknown property is not allowed.
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[error] 44-44: Unknown property is not allowed.
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[error] 44-44: Unexpected unknown function: dropshadow
Use a known function instead.
See MDN web docs for more details.
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[error] 49-49: Unknown property is not allowed.
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[error] 50-50: Unknown property is not allowed.
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[error] 54-54: Unknown property is not allowed.
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[error] 55-55: Unknown property is not allowed.
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[error] 59-59: Unknown property is not allowed.
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[error] 60-60: Unknown property is not allowed.
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[error] 61-61: Unknown property is not allowed.
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[error] 62-62: Unknown property is not allowed.
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[error] 66-66: Unknown property is not allowed.
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[error] 67-67: Unknown property is not allowed.
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[error] 68-68: Unknown property is not allowed.
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[error] 72-72: Unknown property is not allowed.
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[error] 73-73: Unknown property is not allowed.
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[error] 77-77: Unknown property is not allowed.
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[error] 78-78: Unknown property is not allowed.
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[error] 79-79: Unknown property is not allowed.
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[error] 80-80: Unknown property is not allowed.
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[error] 81-81: Unknown property is not allowed.
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[error] 82-82: Unknown property is not allowed.
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[error] 86-86: Unknown property is not allowed.
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[error] 90-90: Unknown property is not allowed.
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[error] 91-91: Unknown property is not allowed.
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[error] 92-92: Unknown property is not allowed.
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[error] 93-93: Unknown property is not allowed.
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[error] 94-94: Unknown property is not allowed.
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[error] 95-95: Unknown property is not allowed.
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[error] 99-99: Unknown property is not allowed.
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[error] 100-100: Unknown property is not allowed.
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[error] 101-101: Unknown property is not allowed.
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[error] 102-102: Unknown property is not allowed.
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[error] 106-106: Unknown property is not allowed.
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[error] 107-107: Unknown property is not allowed.
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[error] 108-108: Unknown property is not allowed.
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[error] 112-112: Unknown property is not allowed.
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[error] 113-113: Unknown property is not allowed.
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[error] 117-117: Unknown property is not allowed.
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[error] 118-118: Unknown property is not allowed.
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[error] 119-119: Unknown property is not allowed.
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[error] 123-123: Unknown property is not allowed.
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[error] 124-124: Unknown property is not allowed.
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[error] 125-125: Unknown property is not allowed.
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[error] 129-129: Unknown property is not allowed.
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🔇 Additional comments (6)
src/main/java/org/example/model/CarType.java (1)
1-8: LGTM.
Clear enum values; good fit for@Enumerated(EnumType.STRING)usage.src/main/java/org/example/Main.java (1)
1-7: LGTM as a launcher wrapper.
Matches the shaded-jar manifestmainClassand delegates to the JavaFX bootstrap.src/main/java/org/example/repository/BookingRepository.java (1)
10-26: Transaction handling looks solid (rollback + close).
Nice consistency and safety compared to typical beginner JPA code.src/main/resources/css/main.css (1)
1-130: Biome CSS lint is probably configured for web CSS, not JavaFX CSS.
The flood of “unknown property” errors looks like tooling mismatch; consider excludingsrc/main/resources/css/**from Biome or using a JavaFX-aware approach.src/main/java/org/example/service/BookingService.java (1)
15-27: Remove the proposed null-check fix—it is unnecessary.The
extrasfield in theBookingclass is initialized withnew ArrayList<>()at declaration (line 25 ofBooking.java), guaranteeing it is never null. The NPE risk does not exist, and the proposed fix adds unnecessary complexity without value.Likely an incorrect or invalid review comment.
src/main/java/org/example/repository/CarRepository.java (1)
10-21: Good, straightforward read-only queries.
| <!-- Test (Förenklat) --> | ||
| <dependency> | ||
| <groupId>org.junit.jupiter</groupId> | ||
| <artifactId>junit-jupiter-api</artifactId> | ||
| <version>5.10.1</version> | ||
| <scope>test</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>org.hibernate.orm</groupId> | ||
| <artifactId>hibernate-core</artifactId> | ||
| <version>7.2.0.Final</version> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>com.mysql</groupId> | ||
| <artifactId>mysql-connector-j</artifactId> | ||
| <version>9.5.0</version> | ||
| <scope>runtime</scope> | ||
| </dependency> | ||
| <dependency> | ||
| <groupId>io.github.classgraph</groupId> | ||
| <artifactId>classgraph</artifactId> | ||
| <version>4.8.184</version> | ||
| </dependency> | ||
| </dependencies> |
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🧩 Analysis chain
🌐 Web query:
Maven Surefire JUnit 5: is junit-jupiter-api alone sufficient to run tests, or is junit-jupiter-engine / junit-jupiter required?
💡 Result:
Short answer: junit-jupiter-api alone is NOT sufficient to run tests. junit-jupiter-api provides the compile-time test API; you need a JUnit Jupiter TestEngine on the test runtime classpath (either junit-jupiter-engine or the omnibus junit-jupiter artifact which pulls the engine in) for Maven Surefire/Failsafe to discover and execute tests. [1][2]
References:
- JUnit docs: at least one TestEngine (junit-jupiter-engine or junit-jupiter) must be on the test classpath. [1]
- Maven Surefire docs: add junit-jupiter-engine (or junit-jupiter) as a test dependency so tests can be executed. [2]
JUnit 5 tests won't run with only junit-jupiter-api—the test engine is missing.
Add junit-jupiter-engine as a test dependency, or replace junit-jupiter-api with junit-jupiter (aggregator that includes the engine). Maven Surefire requires the TestEngine on the test classpath to discover and execute tests.
Proposed patch
<dependency>
<groupId>org.junit.jupiter</groupId>
- <artifactId>junit-jupiter-api</artifactId>
+ <artifactId>junit-jupiter</artifactId>
<version>5.10.1</version>
<scope>test</scope>
</dependency>📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| <!-- Test (Förenklat) --> | |
| <dependency> | |
| <groupId>org.junit.jupiter</groupId> | |
| <artifactId>junit-jupiter-api</artifactId> | |
| <version>5.10.1</version> | |
| <scope>test</scope> | |
| </dependency> | |
| <dependency> | |
| <groupId>org.hibernate.orm</groupId> | |
| <artifactId>hibernate-core</artifactId> | |
| <version>7.2.0.Final</version> | |
| </dependency> | |
| <dependency> | |
| <groupId>com.mysql</groupId> | |
| <artifactId>mysql-connector-j</artifactId> | |
| <version>9.5.0</version> | |
| <scope>runtime</scope> | |
| </dependency> | |
| <dependency> | |
| <groupId>io.github.classgraph</groupId> | |
| <artifactId>classgraph</artifactId> | |
| <version>4.8.184</version> | |
| </dependency> | |
| </dependencies> | |
| <!-- Test (Förenklat) --> | |
| <dependency> | |
| <groupId>org.junit.jupiter</groupId> | |
| <artifactId>junit-jupiter</artifactId> | |
| <version>5.10.1</version> | |
| <scope>test</scope> | |
| </dependency> | |
| </dependencies> |
🤖 Prompt for AI Agents
In @pom.xml around lines 51 - 58, The POM currently only declares
junit-jupiter-api which lacks the TestEngine, so Maven Surefire can't run tests;
update the dependencies to either add a test-scoped dependency with artifactId
junit-jupiter-engine (groupId org.junit.jupiter, version 5.10.1) or replace the
existing junit-jupiter-api entry with the junit-jupiter aggregator (artifactId
junit-jupiter) so the engine is included on the test classpath; ensure the new
dependency uses <scope>test</scope> to match the other test deps.
| <!-- Detta plugin gör att du kan köra 'mvn javafx:run' --> | ||
| <plugin> | ||
| <groupId>org.openjfx</groupId> | ||
| <artifactId>javafx-maven-plugin</artifactId> | ||
| <version>0.0.8</version> | ||
| <configuration> | ||
| <mainClass>org.example.Main</mainClass> | ||
| </configuration> | ||
| </plugin> | ||
|
|
||
| <plugin> | ||
| <groupId>org.apache.maven.plugins</groupId> | ||
| <artifactId>maven-shade-plugin</artifactId> | ||
| <version>3.5.0</version> | ||
| <executions> | ||
| <execution> | ||
| <phase>package</phase> | ||
| <goals> | ||
| <goal>shade</goal> | ||
| </goals> | ||
| <configuration> | ||
| <transformers> | ||
| <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> | ||
| <mainClass>org.example.Main</mainClass> | ||
| </transformer> | ||
| <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"> | ||
| <resource>META-INF/persistence.xml</resource> | ||
| </transformer> | ||
| </transformers> | ||
| </configuration> | ||
| </execution> | ||
| </executions> | ||
| </plugin> | ||
| </plugins> | ||
| </build> |
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🧩 Analysis chain
🌐 Web query:
javafx-maven-plugin maven-shade-plugin compatibility Java 17 packaging
💡 Result:
Short answer
- The modern openjfx javafx-maven-plugin (org.openjfx) supports JavaFX 11+ and works with Java 17; it can run/compile and also provides jlink/jpackage support for packaging. [1]
- The maven-shade-plugin can produce a "fat" JAR for JavaFX on Java 17, but JavaFX includes native libraries (platform classifiers) which make a single uber‑jar fragile and unsupported in many cases—you must include platform-specific classifiers and extract native libs at runtime (and set a Main-Class via a Shade transformer). For production on Java 17 the recommended approach is to create a custom runtime image (jlink) or native installer (jpackage) rather than relying on a cross‑platform shaded jar. [2][3]
Practical guidance
- Use the org.openjfx javafx-maven-plugin to run and to produce jlink/jpackage images (works with Java 17). This avoids native-library issues by bundling a tailored JRE. [1]
- If you insist on a single JAR with shade:
- Depend on org.openjfx artifacts with correct OS/arch classifiers (e.g. javafx‑controls:17:win‑x64).
- Configure maven-shade-plugin to set the Main-Class and include a Transformer to merge manifests.
- Add logic to extract native libraries at startup (or rely on the JavaFX maven jars’ extraction behavior). Expect platform-specific builds. See community notes/warnings. [2][3]
- Best practice for Java 17: prefer jlink + jpackage (or the javafx-maven-plugin’s helpers) to produce small, portable runtimes/installers that include JavaFX native code. [1][2]
If you want, I can:
- paste a minimal pom.xml example for javafx-maven-plugin + jlink for Java 17, or
- show a sample maven-shade-plugin configuration that handles Main-Class and platform classifiers.
🌐 Web query:
maven-shade-plugin AppendingTransformer META-INF/persistence.xml duplicates issues
💡 Result:
Short answer
- AppendingTransformer just concatenates files verbatim, so using it on META-INF/persistence.xml produces multiple XML prolog/root elements and duplicate persistence-unit entries (invalid XML / duplicate definitions). This is the cause of the “duplicates” problem. [1][2]
How to fix
-
Use XmlAppendingTransformer (built into the shade plugin) instead of AppendingTransformer — it merges XML fragments under the same root element rather than blindly concatenating files. Example:
META-INF/persistence.xml
(configure the transform in your maven-shade-plugin execution). [1] -
Alternatives if XmlAppendingTransformer doesn’t meet your needs:
- Merge persistence.xml manually into a single, correct file in the project (recommended for JPA persistence.xml because ordering/IDs matter).
- Write a small custom ResourceTransformer to merge exactly the persistence-unit elements you want.
- Exclude persistence.xml from all dependencies and include only the one you control. [1][2]
Notes
- Verify you are using a recent maven-shade-plugin (3.x+) so you have XmlAppendingTransformer and current fixes. [1][3]
References
- Maven Shade Plugin — Resource transformers (XmlAppendingTransformer, AppendingTransformer). [1]
- Stack Overflow discussion showing duplicate-key/duplicate-content behaviour when using AppendingTransformer. [2]
References mapping:
[1] Maven Shade Plugin — Resource Transformers.
[2] "AppendingTransformer in maven-shade-plugin generates one file with duplicate keys" (Stack Overflow).
[3] Maven Shade Plugin changelog / issues (use recent 3.x releases).
Use XmlAppendingTransformer instead of AppendingTransformer for META-INF/persistence.xml.
AppendingTransformer concatenates files verbatim, producing invalid XML with duplicate <persistence-unit> entries. Replace with XmlAppendingTransformer, which properly merges XML fragments.
Also reconsider the shaded JAR approach for JavaFX on Java 17. The maven-shade-plugin does not handle JavaFX's platform-specific native libraries well (OS/arch classifiers), making a single cross-platform uber-jar fragile and unsupported. The recommended approach for Java 17 is to use jlink or jpackage via the javafx-maven-plugin instead, which produces a tailored JRE with JavaFX and avoids native-library extraction issues.
🤖 Prompt for AI Agents
In @pom.xml around lines 71 - 105, The Maven shade config uses
AppendingTransformer for META-INF/persistence.xml which concatenates XML and
yields invalid duplicate <persistence-unit> entries; replace the transformer
implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"
for the resource META-INF/persistence.xml with
implementation="org.apache.maven.plugins.shade.resource.XmlAppendingTransformer"
so the persistence XML is merged correctly, and also remove or guard against
shading JavaFX native libs: stop producing a single cross-platform shaded JAR
for JavaFX (maven-shade-plugin) and instead switch to using
javafx-maven-plugin's jlink/jpackage workflows (or document platform-specific
classifiers) to build platform-specific runtime images that include JavaFX
natives.
| @Override | ||
| public void start(Stage stage) { | ||
| try { | ||
| // 1. Initiera databasen och ladda testdata (seed) | ||
| initDatabase(); | ||
|
|
||
| // 2. Ladda gränssnittet | ||
| FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource("/fxml/main_view.fxml")); | ||
| Scene scene = new Scene(fxmlLoader.load()); | ||
|
|
||
| // Koppla på CSS för "Hertz-looken" | ||
| scene.getStylesheets().add(App.class.getResource("/css/main.css").toExternalForm()); | ||
|
|
||
| stage.setTitle("Hertz Biluthyrning - Grupp 7"); | ||
| stage.setScene(scene); | ||
| stage.show(); | ||
| } catch (Exception e) { | ||
| e.printStackTrace(); | ||
| System.err.println("Kunde inte starta applikationen: " + e.getMessage()); | ||
| } | ||
| } |
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Fail fast if FXML/CSS resources are missing (avoid NPEs).
App.class.getResource(...) can return null; current code will throw a NullPointerException and then limp on after printing. Consider explicit null checks (and ideally show a JavaFX alert + Platform.exit()).
🤖 Prompt for AI Agents
In @src/main/java/org/example/App.java around lines 14 - 34, In start(Stage
stage) ensure resources are validated before use: check the results of
App.class.getResource("/fxml/main_view.fxml") and
App.class.getResource("/css/main.css") for null and handle missing resources by
showing a JavaFX Alert (or logging) and calling Platform.exit() so the app fails
fast instead of allowing a NullPointerException; update the FXMLLoader
instantiation (used in start), the scene creation, and the
scene.getStylesheets().add call to only proceed if both resources are non-null
and provide a clear error message to the user when exiting.
| private void initDatabase() { | ||
| EntityManager em = JPAUtil.getEntityManagerFactory().createEntityManager(); | ||
| try { | ||
| DataInitializer.seed(em); | ||
| } finally { | ||
| em.close(); | ||
| } | ||
| } |
There was a problem hiding this comment.
Make DB seeding transaction-safe on exceptions (ensure rollback).
If DataInitializer.seed(em) throws while a transaction is active, you can end up closing an EntityManager with an active tx (provider-dependent behavior). Either add rollback handling here or (preferably) inside DataInitializer.seed(...).
🤖 Prompt for AI Agents
In @src/main/java/org/example/App.java around lines 36 - 43, The DB seeding can
leave an active transaction open if DataInitializer.seed(em) throws; make the
seeding transaction-safe by ensuring rollback on exceptions. Fix option A
(preferred): update DataInitializer.seed(EntityManager) to begin a transaction,
try to perform seeding, commit on success, and in catch check tx.isActive() then
tx.rollback() before rethrowing; ensure the method never leaves a transaction
active. Option B (if changing seed is undesirable): in initDatabase() obtain the
EntityTransaction from the EntityManager, begin the transaction before calling
DataInitializer.seed(em), commit if no exception, and in the catch block
rollback the transaction if active, then rethrow or log, finally closing the
EntityManager; reference methods: initDatabase, DataInitializer.seed,
EntityManager.getTransaction(), EntityTransaction.rollback()/commit().
| @FXML | ||
| public void updatePriceDisplay() { | ||
| Car selectedCar = carComboBox.getValue(); | ||
| LocalDate start = startDatePicker.getValue(); | ||
| LocalDate end = endDatePicker.getValue(); | ||
|
|
||
| if (selectedCar != null && start != null && end != null) { | ||
| Booking tempBooking = new Booking(null, selectedCar, start, end); | ||
| long days = tempBooking.getDurationInDays(); | ||
| double total = bookingService.calculateTotalPrice(tempBooking); | ||
|
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||
| daysLabel.setText(String.valueOf(days)); | ||
| carPriceLabel.setText(String.format("%.2f kr", selectedCar.getDailyPrice() * days)); | ||
| totalAmountLabel.setText(String.format("%.2f kr", total)); | ||
| } | ||
| } |
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Price display can become inconsistent with charged total due to day clamping mismatch.
BookingService.calculateTotalPrice() clamps days to at least 1 (line 19), but the controller displays the raw days value from Booking.getDurationInDays() without clamping. If the date range results in 0 or negative days, users can see 0 days and 0 kr in the UI while the actual booking total uses a clamped value of 1 day. Apply the same clamping logic in the controller to keep the displayed price aligned with what will be charged.
Proposed controller-side clamp
long days = tempBooking.getDurationInDays();
+ if (days <= 0) days = 1;
double total = bookingService.calculateTotalPrice(tempBooking);🤖 Prompt for AI Agents
In @src/main/java/org/example/controller/BookingController.java around lines 37
- 52, The controller's updatePriceDisplay uses Booking.getDurationInDays()
directly causing UI to show 0 days while BookingService.calculateTotalPrice()
clamps to at least 1; modify updatePriceDisplay to apply the same clamp: compute
long days = tempBooking.getDurationInDays(); long clampedDays = Math.max(1,
days); then use clampedDays for daysLabel, for calculating carPriceLabel
(selectedCar.getDailyPrice() * clampedDays) and for any displayed totals so the
UI matches BookingService.calculateTotalPrice(); keep all existing null checks
and use clampedDays wherever the display currently uses days.
| .logo-text { | ||
| -fx-text-fill: #ffcc00; /* Guld/Gul */ | ||
| -fx-margin-bottom: 20; | ||
| } |
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🧩 Analysis chain
🌐 Web query:
JavaFX CSS properties -fx-margin-bottom valid supported
💡 Result:
Short answer: No — -fx-margin-bottom is not a supported JavaFX CSS property.
Details and alternatives:
- The JavaFX CSS reference shows there is no generic margin CSS property; layout is generally handled by containers and some controls support -fx-padding / insets, not a CSS margin property. [1]
- To set spacing around a child, use container APIs (e.g. VBox.setMargin(node, new Insets(...)) or <HBox.margin> / <GridPane.margin> in FXML). [2][3]
- If you must emulate a CSS "margin", you can approximate it with -fx-border-insets and -fx-background-insets combined with -fx-padding on the control. Example workaround:
.my-control { -fx-padding: 5px; -fx-border-insets: 5px; -fx-background-insets: 5px; }. [2]
Sources:
[1] JavaFX CSS Reference Guide (Oracle).
[2] StackOverflow: "JavaFX: How to define margin to TextField in css?"
[3] StackOverflow: "JavaFX - Set Margin Between TitledPane"
🌐 Web query:
JavaFX CSS margin properties documentation official reference
💡 Result:
Official JavaFX references:
- JavaFX CSS Reference Guide (JavaFX 8) — includes support notes for padding and margins and lists CSS properties (e.g. -fx-padding, -fx-border-insets, -fx-background-insets). [1]
- JavaFX CSS Reference Guide (older JavaFX 2 guide) — notes that “CSS padding and margins properties are supported on some JavaFX scene graph objects.” [2]
- Oracle “Working With Layouts” / Styling Layout Panes with CSS — practical guidance for spacing/padding/insets in layout panes. [3]
Useful properties to check in those docs: -fx-padding, -fx-border-insets, -fx-background-insets (there is no general -fx-margin property; margins are often handled by layout APIs such as VBox.setMargin/Insets). [1][2][3]
Sources:
[1] https://docs.oracle.com/javase/8/javafx/api/javafx/scene/doc-files/cssref.html
[2] https://docs.oracle.com/javafx/2/api/javafx/scene/doc-files/cssref.html
[3] https://docs.oracle.com/javafx/2/layout/style_css.htm
🌐 Web query:
JavaFX add bottom spacing Label VBox HBox recommended way
💡 Result:
Three common, recommended ways — pick based on whether the space should be fixed, affect the whole container, or be flexible:
- Set a margin on the Label (fixed space below that label)
- Java:
VBox.setMargin(myLabel, new Insets(0,0,10,0)); - FXML:
<VBox.margin></VBox.margin> - Use when you only want that label to have extra outside space. [1][3]
- Add padding to the container (affects all children)
- Java:
vbox.setPadding(new Insets(0,0,10,0)); - Use when you want container-wide inner spacing at the bottom. [1]
- Use a flexible spacer Region (pushes content up and consumes extra space)
- Java:
Region spacer = new Region();
spacer.setPrefHeight(40); // optional fixed min
VBox.setVgrow(spacer, Priority.ALWAYS);
vbox.getChildren().add(spacer); - Use when you want the bottom gap to expand/contract with available space. [2]
References:
- VBox API (margin, spacing, padding, vgrow). [1]
- Spacer Region pattern and example. [2]
- FXML/Insets examples on StackOverflow. [3]
-fx-margin-bottom is not a supported JavaFX CSS property and will be silently ignored.
JavaFX CSS does not include a margin property. To add bottom spacing, use layout container APIs instead: either VBox.setMargin(node, new Insets(0,0,10,0)) in Java, or <VBox.margin><Insets bottom="10.0"/></VBox.margin> in FXML. If spacing within the control itself is needed, -fx-padding is supported on some controls.
🧰 Tools
🪛 Biome (2.1.2)
[error] 11-11: Unknown property is not allowed.
See CSS Specifications and browser specific properties for more details.
To resolve this issue, replace the unknown property with a valid CSS property.
(lint/correctness/noUnknownProperty)
[error] 12-12: Unknown property is not allowed.
See CSS Specifications and browser specific properties for more details.
To resolve this issue, replace the unknown property with a valid CSS property.
(lint/correctness/noUnknownProperty)
🤖 Prompt for AI Agents
In @src/main/resources/css/main.css around lines 10 - 13, The CSS rule
.logo-text uses an unsupported property -fx-margin-bottom which JavaFX will
ignore; remove that property from the .logo-text selector and instead add
spacing via layout APIs: set a margin on the node's parent (e.g., call
VBox.setMargin(yourLogoNode, new Insets(0,0,10,0)) in Java or add
<VBox.margin><Insets bottom="10.0"/></VBox.margin> in FXML) or, if the control
supports internal spacing, replace with a supported property like -fx-padding on
.logo-text.
| <HBox spacing="30" styleClass="content-view" xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml" | ||
| fx:controller="org.example.controller.BookingController"> | ||
| <padding> | ||
| <Insets top="30" right="30" bottom="30" left="30"/> | ||
| </padding> | ||
|
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||
| <!-- Vänster sida: Formulär --> | ||
| <VBox spacing="20" HBox.hgrow="ALWAYS"> | ||
| <Label text="Skapa ny bokning" styleClass="view-header"/> | ||
|
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||
| <GridPane hgap="15" vgap="15"> | ||
| <Label text="Välj bil:" GridPane.rowIndex="0" GridPane.columnIndex="0"/> | ||
| <ComboBox fx:id="carComboBox" promptText="Välj en bil..." maxWidth="Infinity" | ||
| GridPane.rowIndex="0" GridPane.columnIndex="1" onAction="#updatePriceDisplay"/> | ||
|
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| <Label text="Startdatum:" GridPane.rowIndex="1" GridPane.columnIndex="0"/> | ||
| <DatePicker fx:id="startDatePicker" maxWidth="Infinity" | ||
| GridPane.rowIndex="1" GridPane.columnIndex="1" onAction="#updatePriceDisplay"/> | ||
|
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| <Label text="Slutdatum:" GridPane.rowIndex="2" GridPane.columnIndex="0"/> | ||
| <DatePicker fx:id="endDatePicker" maxWidth="Infinity" | ||
| GridPane.rowIndex="2" GridPane.columnIndex="1" onAction="#updatePriceDisplay"/> | ||
|
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| <Label text="Kund (Email):" GridPane.rowIndex="3" GridPane.columnIndex="0"/> | ||
| <TextField fx:id="customerEmailField" promptText="E-postadress..." | ||
| GridPane.rowIndex="3" GridPane.columnIndex="1"/> | ||
| </GridPane> | ||
|
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| <Label text="Tillval" styleClass="section-header"/> | ||
| <VBox fx:id="extrasContainer" spacing="10" styleClass="extras-box"> | ||
| <!-- Här kommer kryssrutor för extras laddas in dynamiskt --> | ||
| </VBox> | ||
| </VBox> | ||
|
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| <!-- Höger sida: Sammanfattning --> | ||
| <VBox spacing="20" prefWidth="300" styleClass="summary-pane"> | ||
| <padding> | ||
| <Insets top="20" right="20" bottom="20" left="20"/> | ||
| </padding> | ||
| <Label text="Sammanfattning" styleClass="summary-header"/> | ||
| <Separator/> | ||
|
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| <HBox alignment="CENTER_LEFT"> | ||
| <Label text="Antal dagar: "/> | ||
| <Region HBox.hgrow="ALWAYS"/> | ||
| <Label fx:id="daysLabel" text="0" styleClass="bold-text"/> | ||
| </HBox> | ||
|
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| <HBox alignment="CENTER_LEFT"> | ||
| <Label text="Bil hyra: "/> | ||
| <Region HBox.hgrow="ALWAYS"/> | ||
| <Label fx:id="carPriceLabel" text="0 kr" styleClass="bold-text"/> | ||
| </HBox> | ||
|
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| <Separator/> | ||
| <HBox alignment="CENTER_LEFT"> | ||
| <Label text="TOTALT ATT BETALA" styleClass="total-label"/> | ||
| <Region HBox.hgrow="ALWAYS"/> | ||
| <Label fx:id="totalAmountLabel" text="0 kr" styleClass="total-price"/> | ||
| </HBox> | ||
|
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| <Button text="BEKRÄFTA BOKNING" maxWidth="Infinity" styleClass="primary-button" | ||
| onAction="#onConfirmBooking" prefHeight="50"/> | ||
| </VBox> |
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Wire extrasContainer in the controller and register listeners for dynamic extras.
The extrasContainer VBox is referenced in the FXML but is not declared as an @FXML field in BookingController, and there is no code to dynamically load extras or register listeners. The updatePriceDisplay() method only calculates totals from the car and date selections—it does not account for extras. You need to:
- Add
@FXML private VBox extrasContainer;to the controller - Load extras dynamically in
initialize()and create CheckBox controls for each - Register a listener on each CheckBox that calls
updatePriceDisplay()on toggle - Modify
updatePriceDisplay()to include selected extras in the total price calculation
🤖 Prompt for AI Agents
In @src/main/resources/fxml/booking_view.fxml around lines 7 - 70, The
extrasContainer VBox is declared in FXML but not wired into BookingController
and extras are not accounted for in pricing; add an @FXML private VBox
extrasContainer field to BookingController, then in initialize() dynamically
create a CheckBox for each extra (or populate from your extras list/source), add
a ChangeListener/selectedProperty listener on each CheckBox that calls
updatePriceDisplay(), and modify updatePriceDisplay() to sum the prices of all
selected extras (by iterating extrasContainer.getChildren() or a maintained list
of CheckBoxes) and include that extras sum in the displayed
carPriceLabel/totalAmountLabel calculations.
| <VBox alignment="CENTER" spacing="20.0" xmlns="http://javafx.com/javafx/17.0.2" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.example.crm.HelloController"> | ||
| <padding> | ||
| <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" /> | ||
| </padding> | ||
| <Label text="Lägg till ny kund" styleClass="header-label"/> | ||
| <TextField fx:id="firstNameField" promptText="Förnamn"/> | ||
| <TextField fx:id="lastNameField" promptText="Efternamn"/> | ||
| <TextField fx:id="emailField" promptText="E-post"/> | ||
| <Button text="Lägg till kund" onAction="#handleAddCustomer" styleClass="primary-button"/> | ||
| </VBox> |
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Fix FXML controller reference — non-existent class will cause runtime failure.
Line 9 references fx:controller="com.example.crm.HelloController", which does not exist. The application uses org.example.controller.CustomerController, which contains all required @FXML fields (firstNameField, lastNameField, emailField) and the handleAddCustomer() method.
Proposed patch
-<VBox alignment="CENTER" spacing="20.0" xmlns="http://javafx.com/javafx/17.0.2" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.example.crm.HelloController">
+<VBox alignment="CENTER" spacing="20.0" xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml/1" fx:controller="org.example.controller.CustomerController">📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| <VBox alignment="CENTER" spacing="20.0" xmlns="http://javafx.com/javafx/17.0.2" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.example.crm.HelloController"> | |
| <padding> | |
| <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" /> | |
| </padding> | |
| <Label text="Lägg till ny kund" styleClass="header-label"/> | |
| <TextField fx:id="firstNameField" promptText="Förnamn"/> | |
| <TextField fx:id="lastNameField" promptText="Efternamn"/> | |
| <TextField fx:id="emailField" promptText="E-post"/> | |
| <Button text="Lägg till kund" onAction="#handleAddCustomer" styleClass="primary-button"/> | |
| </VBox> | |
| <VBox alignment="CENTER" spacing="20.0" xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml/1" fx:controller="org.example.controller.CustomerController"> | |
| <padding> | |
| <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" /> | |
| </padding> | |
| <Label text="Lägg till ny kund" styleClass="header-label"/> | |
| <TextField fx:id="firstNameField" promptText="Förnamn"/> | |
| <TextField fx:id="lastNameField" promptText="Efternamn"/> | |
| <TextField fx:id="emailField" promptText="E-post"/> | |
| <Button text="Lägg till kund" onAction="#handleAddCustomer" styleClass="primary-button"/> | |
| </VBox> |
🤖 Prompt for AI Agents
In @src/main/resources/fxml/customer_view.fxml around lines 9 - 18, The FXML
references a non-existent controller class via
fx:controller="com.example.crm.HelloController", causing runtime failure; change
the fx:controller value to the actual controller class
org.example.controller.CustomerController so the FXML can wire the @FXML fields
(firstNameField, lastNameField, emailField) and the handler method
handleAddCustomer() correctly.
| <properties> | ||
| <!-- Databaskonfiguration (ändra db_name, user och password till dina egna) --> | ||
| <property name="jakarta.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/car_rental_db?createDatabaseIfNotExist=true"/> | ||
| <property name="jakarta.persistence.jdbc.user" value="root"/> | ||
| <property name="jakarta.persistence.jdbc.password" value=""/> | ||
| <property name="jakarta.persistence.jdbc.driver" value="com.mysql.cj.jdbc.Driver"/> | ||
|
|
||
| <!-- Hibernate inställningar --> | ||
| <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> | ||
| <property name="hibernate.show_sql" value="true"/> | ||
| <property name="hibernate.format_sql" value="true"/> | ||
| <property name="hibernate.hbm2ddl.auto" value="update"/> | ||
| </properties> |
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Don’t commit root/blank DB credentials; externalize config.
root with empty password in VCS is a serious security risk and also makes the app non-portable. Prefer environment-specific config (env vars / Maven profiles) and non-root DB users.
🤖 Prompt for AI Agents
In @src/main/resources/META-INF/persistence.xml around lines 18 - 30, The
persistence.xml currently hardcodes a root/empty DB user (properties
jakarta.persistence.jdbc.user and jakarta.persistence.jdbc.password) which must
be removed from VCS; update persistence.xml to use externalized placeholders
(e.g. ${DB_USER}, ${DB_PASSWORD}, ${JDBC_URL}) or a JNDI datasource reference
and wire those values from environment variables, Maven profiles, or application
config at runtime, and replace the root account with a non-root DB user; ensure
the code that bootstraps JPA reads the externalized values (or uses the
configured DataSource) instead of the hardcoded properties.
| <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> | ||
| <property name="hibernate.show_sql" value="true"/> | ||
| <property name="hibernate.format_sql" value="true"/> | ||
| <property name="hibernate.hbm2ddl.auto" value="update"/> | ||
| </properties> |
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🌐 Web query:
Hibernate 6.4 MySQL dialect MySQLDialect vs MySQL8Dialect recommended
💡 Result:
Short answer: Use org.hibernate.dialect.MySQLDialect (not MySQL8Dialect). Hibernate 6 unifies MySQL dialects into MySQLDialect and deprecates the versioned classes; you can rely on automatic dialect resolution or construct MySQLDialect for a specific version (e.g. MySQLDialect(800)). Remove explicit MySQL8Dialect usage. [1][2][3]
References:
- MySQL8Dialect is deprecated; use MySQLDialect(800). [1]
- Package summary / MySQLDialect (Hibernate 6.x): single MySQLDialect for MySQL 5.7+; version info exposed at runtime. [2][3]
🌐 Web query:
Hibernate 6.4 hbm2ddl.auto update setting best practices production development
💡 Result:
Short answer
- Never rely on hibernate.hbm2ddl.auto=update for production. Use explicit, versioned migrations (Flyway/Liquibase) and set Hibernate to validate or none in prod. (docs.hibernate.org)
Recommended settings and practices
- Development
- Use update or create/create-drop for fast local iteration, but prefer running migration tooling locally so schema changes are tracked. (javanexus.com)
- Staging/QA
- Apply the exact migration scripts you will run in production and test them against representative data. Do not rely on automatic update. (docs.hibernate.org)
- Production
- Set hibernate.hbm2ddl.auto to validate or none (no automatic DDL). Manage all schema changes via tested, versioned migration scripts (Flyway/Liquibase) applied as part of CI/CD with DB backups and rollback plans. Limit DB user DDL privileges in prod. (docs.hibernate.org)
Why update is risky (brief)
- It doesn’t reliably handle complex changes (renames, type changes, constraint adjustments) and may leave orphan columns/constraints or produce unexpected DDL. It’s hard to review, test, or roll back automatic changes. (stackoverflow.com)
Practical checklist before changing schema
- Create a migration script (SQL or migration tool)
- Put script in VCS and CI pipeline
- Run against staging with representative data
- Backup production DB and have a rollback plan
- Grant minimal DDL privileges to app DB user and run migrations separately (CI job or DBA) rather than at app startup. (docs.hibernate.org)
If you still consider update in production (not recommended)
- Do a full backup, run in a controlled maintenance window, and test on a production-like snapshot first — but prefer explicit migrations instead. (learn-it-university.com)
If you want, I can:
- show example Flyway/Liquibase workflow for Hibernate 6.4, or
- draft a sample CI migration pipeline and recommended Hibernate config for each environment.
Citations:
- 1: https://docs.hibernate.org/orm/5.1/userguide/html_single/appendices/BestPractices.html?utm_source=openai
- 2: https://javanexus.com/blog/common-pitfalls-hibernate-ddl-schema?utm_source=openai
- 3: https://docs.hibernate.org/orm/5.1/userguide/html_single/appendices/BestPractices.html?utm_source=openai
- 4: https://docs.hibernate.org/orm/5.1/userguide/html_single/appendices/BestPractices.html?utm_source=openai
- 5: https://stackoverflow.com/questions/7079954/hibernate-hbm2ddl-auto-update-does-not-drop-columns-with-mysql?utm_source=openai
- 6: https://docs.hibernate.org/orm/5.1/userguide/html_single/appendices/BestPractices.html?utm_source=openai
- 7: https://learn-it-university.com/using-hbm2ddl-autoupdate-in-production-best-practices-and-risks/?utm_source=openai
Use environment-specific hbm2ddl.auto settings; update is unsafe for production.
The dialect org.hibernate.dialect.MySQLDialect is correct for Hibernate 6.4.1. However, hbm2ddl.auto=update should not be used in production—it cannot reliably handle schema changes (column drops, type modifications, constraint adjustments) and can leave orphaned columns or produce unexpected DDL.
For development, update or create-drop is acceptable. For production, set hbm2ddl.auto to validate or none and manage schema changes via versioned migration scripts (Flyway/Liquibase) applied separately from application startup, with proper backups and rollback plans.
🤖 Prompt for AI Agents
In @src/main/resources/META-INF/persistence.xml around lines 26 - 30, The
persistence.xml currently sets hibernate.hbm2ddl.auto="update", which is unsafe
for production; change this to use environment-specific values (e.g., keep
"update" or "create-drop" for development but set hibernate.hbm2ddl.auto to
"validate" or "none" in production) and drive the value from an environment
variable or profile so production uses migrations (Flyway/Liquibase) instead of
automatic updates; ensure the property name "hibernate.hbm2ddl.auto" is updated
accordingly and document that schema changes must be applied via versioned
migration scripts rather than relying on the "update" setting.
2 participants
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