Refactor Hibernate configuration to use a static local environment variable and simplify controller instantiation

hibernate-project/pom.xml

@@ -69,6 +69,11 @@
             <artifactId>jakarta.validation-api</artifactId>
             <version>3.1.0</version>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>2.0.17</version>
+        </dependency>
         <dependency>
             <groupId>com.mysql</groupId>
             <artifactId>mysql-connector-j</artifactId>
@@ -79,16 +84,6 @@
             <artifactId>reflections</artifactId>
             <version>0.10.2</version>
         </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
-            <version>2.0.17</version>
-        </dependency>
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <version>5.17.0</version>
-        </dependency>
 
         <!-- JAX-RS (Jersey) -->
         <dependency>

hibernate-project/src/main/java/com/humanbooster/App.java

@@ -1,10 +1,12 @@
 package com.humanbooster;
 
+import com.humanbooster.client.RestClient;
 import com.humanbooster.config.HibernateConfig;
 import com.humanbooster.config.ServerConfig;
 import com.humanbooster.dao.AdDao;
 import com.humanbooster.dao.ArticleDao;
 import com.humanbooster.dao.UserDao;
+import com.humanbooster.factory.DataFactory;
 import com.humanbooster.model.Ad;
 import com.humanbooster.model.Article;
 import com.humanbooster.model.User;
@@ -12,19 +14,19 @@ import com.humanbooster.service.AdService;
 import com.humanbooster.service.ArticleService;
 import com.humanbooster.service.UserService;
 import org.hibernate.SessionFactory;
-import org.hibernate.boot.Metadata;
-import org.hibernate.boot.MetadataSources;
-import org.hibernate.boot.registry.StandardServiceRegistry;
-import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 
-import java.math.BigDecimal;
-import java.time.LocalDate;
 import java.util.List;
 
 public class App {
+
+    public static final boolean LOCAL_ENVIRONMENT = true;
+
     public static void main(String[] args) {
+
         System.out.println("Démarrage de l'application");
 
+        RestClient client = new RestClient();
+
         try {
             ServerConfig serverConfig = new ServerConfig();
             serverConfig.startServer();
@@ -32,58 +34,18 @@ public class App {
             System.out.println("Erreur lors du démarrage du serveur : " + e.getMessage());
         }
 
-        SessionFactory sessionFactory;
-
-        if (HibernateConfig.isLocalEnvironment()) sessionFactory = HibernateConfig.getSessionFactory();
-
-        else {
-            StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
-                    .configure()
-                    .build();
-
-            Metadata metadata = new MetadataSources(registry).buildMetadata();
-            sessionFactory = metadata.buildSessionFactory();
-        }
-
-        User user = new User("Bob", "bob@example.com", null);
-
-        user.setArticles(List.of(
-                new Article("Article 1", "Contenu de l'article 1", LocalDate.now(), user, 0),
-                new Article("Article 2", "Contenu de l'article 2", LocalDate.now(), user, 0)
-        ));
-
-        List<Ad> ads = List.of(
-                (new Ad(
-                        "Ad 1",
-                        "Contenu de l'annonce 1",
-                        LocalDate.now(),
-                        LocalDate.now().plusDays(7),
-                        "contact@example.com",
-                        BigDecimal.valueOf(12))),
-                (new Ad(
-                        "Ad 2",
-                        "Contenu de l'annonce 2",
-                        LocalDate.now(),
-                        LocalDate.now().plusDays(10),
-                        "contact@example.com",
-                        BigDecimal.valueOf(6.7)))
-
-        );
+        SessionFactory sessionFactory = new HibernateConfig().getSessionFactory();
 
         UserService userService = new UserService(new UserDao(sessionFactory));
         ArticleService articleService = new ArticleService(new ArticleDao(sessionFactory));
         AdService adService = new AdService(new AdDao(sessionFactory));
 
+        DataFactory dataFactory = new DataFactory();
+
         cleanDatabase(userService, articleService, adService);
 
-        userService.createUser(user);
-
-        articleService.findArticlesByCriteria("test", 3L, 1, 1).forEach(article -> {
-                    System.out.println("\nArticle trouvé :" + article.toString());
-                }
-        );
-
-        ads.forEach(adService::createAd);
+        userService.createUser(dataFactory.createUser("Michel", "michel@test.fr"));
+        dataFactory.createAds().forEach(adService::createAd);
 
         sessionFactory.close();
         System.out.print("Fin du programme");

hibernate-project/src/main/java/com/humanbooster/annotation/Pair.java

@@ -1,6 +0,0 @@
-package com.humanbooster.annotation;
-
-public @interface Pair {
-
-    String message() default "Le nombre doit être pair";
-}

hibernate-project/src/main/java/com/humanbooster/annotation/PairValidator.java

@@ -1,12 +0,0 @@
-package com.humanbooster.annotation;
-
-import jakarta.validation.ConstraintValidator;
-import jakarta.validation.ConstraintValidatorContext;
-
-public class PairValidator implements ConstraintValidator<Pair, Integer> {
-
-    @Override
-    public boolean isValid(Integer integer, ConstraintValidatorContext constraintValidatorContext) {
-        return (integer != null) && (integer % 2 == 0);
-    }
-}

hibernate-project/src/main/java/com/humanbooster/api/ApiApplication.java

@@ -1,11 +0,0 @@
-package com.humanbooster.api;
-
-import org.glassfish.jersey.jackson.JacksonFeature;
-import org.glassfish.jersey.server.ResourceConfig;
-
-public class ApiApplication extends ResourceConfig {
-    public ApiApplication() {
-        packages("com.humanbooster");
-        register(JacksonFeature.class);
-    }
-}

hibernate-project/src/main/java/com/humanbooster/client/RestClient.java

@@ -0,0 +1,63 @@
+package com.humanbooster.client;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+
+public class RestClient {
+
+    private final HttpClient httpClient = HttpClient.newHttpClient();
+
+    public String sendGetRequest(String url, String method, String body) {
+
+        HttpRequest.Builder builder = HttpRequest.newBuilder()
+                .uri(URI.create(url))
+                .header("Content-Type", "application/json");
+
+        switch (method.toUpperCase()) {
+            case "GET":
+                builder.GET();
+                break;
+            case "POST":
+                builder.POST(HttpRequest.BodyPublishers.ofString(body));
+                break;
+            case "PUT":
+                builder.PUT(HttpRequest.BodyPublishers.ofString(body));
+                break;
+            case "DELETE":
+                builder.DELETE();
+                break;
+            default:
+                throw new IllegalArgumentException("Invalid HTTP method: " + method);
+        }
+
+        HttpRequest request = builder.build();
+
+        HttpResponse<String> response;
+
+        try {
+            response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+            return parseResponse(response.body());
+        } catch (Exception e) {
+            System.err.println("Error occurred while sending the request: " + e.getMessage());
+        }
+
+        return null;
+    }
+
+    private String parseResponse(String response) {
+
+        ObjectMapper mapper = new ObjectMapper();
+        try {
+            JsonNode jsonNode = mapper.readTree(response);
+            return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(jsonNode);
+        } catch (Exception e) {
+            System.err.println("Error occurred while parsing the response: " + e.getMessage());
+        }
+        return null;
+    }
+}

hibernate-project/src/main/java/com/humanbooster/config/HibernateConfig.java

@@ -1,6 +1,11 @@
 package com.humanbooster.config;
 
+import com.humanbooster.App;
 import org.hibernate.SessionFactory;
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistry;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
 import org.hibernate.cfg.Configuration;
 import org.reflections.Reflections;
 
@@ -8,28 +13,16 @@ import jakarta.persistence.Entity;
 
 public class HibernateConfig {
 
-    private static final SessionFactory sessionFactory;
-    private static final boolean LOCAL = true;
-    private static String url;
-    private static String username;
-    private static String password;
+    public SessionFactory getSessionFactory() {
 
-    static {
+        SessionFactory sessionFactory;
 
-        if (LOCAL) {
-            url = "jdbc:mysql://127.0.0.1:3306/testdb";
-            username = "admin";
-            password = "admin";
-        } else {
-            url = "jdbc:mysql://mysql:3306/testdb?useSSL=false&allowPublicKeyRetrieval=true";
-            username = "root";
-            password = "root";
-        }
+        if (App.LOCAL_ENVIRONMENT) {
 
             Configuration config = new Configuration()
-                .setProperty("hibernate.connection.url", url)
-                .setProperty("hibernate.connection.username", username)
-                .setProperty("hibernate.connection.password", password)
+                    .setProperty("hibernate.connection.url", "jdbc:mysql://127.0.0.1:3306/testdb")
+                    .setProperty("hibernate.connection.username", "admin")
+                    .setProperty("hibernate.connection.password", "admin")
                     .setProperty("hibernate.connection.driver_class", "com.mysql.cj.jdbc.Driver")
                     .setProperty("hibernate.hbm2ddl.auto", "update")
                     .setProperty("hibernate.show_sql", "false")
@@ -40,15 +33,16 @@ public class HibernateConfig {
                 config.addAnnotatedClass(clazz);
             }
 
-        sessionFactory = config.buildSessionFactory();
-    }
+            return sessionFactory = config.buildSessionFactory();
 
-    public static SessionFactory getSessionFactory() {
-        return sessionFactory;
-    }
+        } else {
+            StandardServiceRegistry registry = new StandardServiceRegistryBuilder()
+                    .configure()
+                    .build();
 
-    public static boolean isLocalEnvironment() {
-        return LOCAL;
+            Metadata metadata = new MetadataSources(registry).buildMetadata();
+            return sessionFactory = metadata.buildSessionFactory();
+        }
     }
 }
 

hibernate-project/src/main/java/com/humanbooster/config/ServerConfig.java

@@ -1,18 +1,23 @@
 package com.humanbooster.config;
 
-import com.humanbooster.api.ApiApplication;
 import org.eclipse.jetty.server.Server;
 import org.eclipse.jetty.servlet.ServletContextHandler;
 import org.eclipse.jetty.servlet.ServletHolder;
+import org.glassfish.jersey.jackson.JacksonFeature;
 import org.glassfish.jersey.server.ResourceConfig;
 import org.glassfish.jersey.servlet.ServletContainer;
 
-public class ServerConfig {
+public class ServerConfig extends ResourceConfig {
+
+    public ServerConfig() {
+        packages("com.humanbooster");
+        register(JacksonFeature.class);
+    }
 
     public void startServer() throws Exception {
-        System.out.println("Starting server...");
+        System.out.println("Lancement du serveur...");
 
-        ResourceConfig config = new ApiApplication();
+        ResourceConfig config = this;
 
         ServletHolder servlet = new ServletHolder(new ServletContainer(config));
         Server server = new Server(80);
@@ -23,10 +28,10 @@ public class ServerConfig {
 
         try {
             server.start();
-            System.out.println("Server started on port 80");
+            System.out.println("Serveur démarré sur le port 80");
             server.join();
         } catch (Exception e) {
-            System.out.println("Failed to start server: " + e.getMessage());
+            System.out.println("Echec lors du lancement du serveur: " + e.getMessage());
         }
     }
 }

hibernate-project/src/main/java/com/humanbooster/controller/ArticleController.java

@@ -0,0 +1,20 @@
+package com.humanbooster.controller;
+
+import com.humanbooster.config.HibernateConfig;
+import com.humanbooster.dao.ArticleDao;
+import com.humanbooster.dao.GenericDao;
+import com.humanbooster.model.Article;
+import jakarta.ws.rs.Path;
+import org.hibernate.SessionFactory;
+
+@Path("/articles")
+public class ArticleController extends GenericControllerImpl<Article, Long> {
+
+    public ArticleController() {
+        this(new HibernateConfig().getSessionFactory(), new ArticleDao(new HibernateConfig().getSessionFactory()));
+    }
+
+    public ArticleController(SessionFactory sessionFactory, GenericDao<Article, Long> dao) {
+        super(sessionFactory, dao);
+    }
+}

hibernate-project/src/main/java/com/humanbooster/controller/GenericController.java

@@ -0,0 +1,11 @@
+package com.humanbooster.controller;
+
+import java.util.List;
+
+public interface GenericController<T, ID> {
+    void create(T entity);
+    T read(ID id);
+    void update(ID id);
+    void delete(ID id);
+    List<T> getAll();
+}

hibernate-project/src/main/java/com/humanbooster/controller/GenericControllerImpl.java

@@ -0,0 +1,55 @@
+package com.humanbooster.controller;
+
+import com.humanbooster.config.HibernateConfig;
+import com.humanbooster.dao.GenericDao;
+import jakarta.ws.rs.*;
+import jakarta.ws.rs.core.MediaType;
+import org.hibernate.SessionFactory;
+
+import java.util.List;
+
+@Produces(MediaType.APPLICATION_JSON)
+@Consumes(MediaType.APPLICATION_JSON)
+public abstract class GenericControllerImpl<T, ID> implements GenericController<T, ID>, GenericDao<T, ID> {
+
+    protected final SessionFactory sessionFactory;
+    private final GenericDao<T, ID> dao;
+
+    public GenericControllerImpl(SessionFactory sessionFactory, GenericDao<T, ID> dao) {
+        this.sessionFactory = sessionFactory;
+        this.dao = dao;
+    }
+
+    @POST
+    @Override
+    public void create(T entity) {
+        dao.create(entity);
+    }
+
+    @GET
+    @Path("/{id}")
+    @Override
+    public T read(@PathParam("id") ID id) {
+        return dao.read(id);
+    }
+
+    @PUT
+    @Path("/{id}")
+    @Override
+    public void update(@PathParam("id") ID id) {
+        dao.update(id);
+    }
+
+    @DELETE
+    @Path("/{id}")
+    @Override
+    public void delete(@PathParam("id") ID id) {
+        dao.delete(id);
+    }
+
+    @GET
+    @Override
+    public List<T> getAll() {
+        return dao.getAll();
+    }
+}

hibernate-project/src/main/java/com/humanbooster/controller/UserController.java

@@ -7,44 +7,17 @@ import jakarta.ws.rs.*;
 import jakarta.ws.rs.core.MediaType;
 import org.hibernate.SessionFactory;
 
-import java.util.List;
 
 @Path("/users")
 @Produces(MediaType.APPLICATION_JSON)
 @Consumes(MediaType.APPLICATION_JSON)
-public class UserController {
+public class UserController extends GenericControllerImpl<User, Long> {
 
-    SessionFactory sessionFactory = HibernateConfig.getSessionFactory();
-
-    private final UserDao dao = new UserDao(sessionFactory);
-
-    @GET
-    public List<User> getAll() {
-        return dao.findAll();
+    public UserController() {
+        this(new HibernateConfig().getSessionFactory(), new UserDao(new HibernateConfig().getSessionFactory()));
     }
 
-    @GET
-    @Path("/{id}")
-    public User getById(@PathParam("id") Long id) {
-        return dao.read(id);
-    }
-
-    @POST
-    public void create(User person) {
-        dao.create(person);
-    }
-
-    @PUT
-    @Path("/{id}")
-    public void update(@PathParam("id") Long id, User user) {
-        user.setId(id);
-        dao.update(user);
-    }
-
-    @DELETE
-    @Path("/{id}")
-    public void delete(@PathParam("id") Long id) {
-        System.out.println();
-        dao.delete(id);
+    public UserController(SessionFactory sessionFactory, UserDao userDao) {
+        super(sessionFactory, userDao);
     }
 }

hibernate-project/src/main/java/com/humanbooster/dao/GenericDao.java

@@ -5,7 +5,7 @@ import java.util.List;
 public interface GenericDao<T, ID> {
     void create(T entity);
     T read(ID id);
-    void update(T entity);
+    void update(ID id);
     void delete(ID id);
-    List<T> findAll();
+    List<T> getAll();
 }

hibernate-project/src/main/java/com/humanbooster/dao/GenericDaoImpl.java

@@ -35,9 +35,10 @@ public abstract class GenericDaoImpl<T, ID> implements GenericDao<T, ID> {
     }
 
     @Override
-    public void update(T entity) {
+    public void update(ID id) {
         try (Session session = sessionFactory.openSession()) {
             session.beginTransaction();
+            T entity = session.get(entityClass, id);
             session.merge(entity);
             session.getTransaction().commit();
         }
@@ -54,7 +55,7 @@ public abstract class GenericDaoImpl<T, ID> implements GenericDao<T, ID> {
     }
 
     @Override
-    public List<T> findAll() {
+    public List<T> getAll() {
         try (Session session = sessionFactory.openSession()) {
             session.beginTransaction();
             List<T> entities = session.createQuery("from " + entityClass.getName(), entityClass).list();

hibernate-project/src/main/java/com/humanbooster/factory/DataFactory.java

@@ -0,0 +1,43 @@
+package com.humanbooster.factory;
+
+import com.humanbooster.model.Ad;
+import com.humanbooster.model.Article;
+import com.humanbooster.model.User;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.util.List;
+
+public class DataFactory {
+
+    public User createUser(String name, String email) {
+        User user = new User(name, email, null);
+
+        user.setArticles(List.of(
+                new Article("Article 1", "Contenu de l'article 1", LocalDate.now(), user, 0),
+                new Article("Article 2", "Contenu de l'article 2", LocalDate.now(), user, 0)
+        ));
+
+        return user;
+    }
+
+    public List<Ad> createAds() {
+        return List.of(
+                (new Ad(
+                        "Ad 1",
+                        "Contenu de l'annonce 1",
+                        LocalDate.now(),
+                        LocalDate.now().plusDays(7),
+                        "contact@example.com",
+                        BigDecimal.valueOf(12))),
+                (new Ad(
+                        "Ad 2",
+                        "Contenu de l'annonce 2",
+                        LocalDate.now(),
+                        LocalDate.now().plusDays(10),
+                        "contact@example.com",
+                        BigDecimal.valueOf(6.7)))
+
+        );
+    }
+}

hibernate-project/src/main/java/com/humanbooster/model/Article.java

@@ -1,5 +1,6 @@
 package com.humanbooster.model;
 
+import com.fasterxml.jackson.annotation.JsonBackReference;
 import jakarta.persistence.*;
 
 import java.time.LocalDate;
@@ -9,6 +10,7 @@ public class Article extends Publication {
 
     @ManyToOne
     @JoinColumn(name="author_id", nullable = false)
+    @JsonBackReference
     private User author;
 
     private int views = 0;

hibernate-project/src/main/java/com/humanbooster/model/User.java

@@ -1,5 +1,6 @@
 package com.humanbooster.model;
 
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import jakarta.persistence.*;
 import jakarta.validation.constraints.NotNull;
 
@@ -19,6 +20,7 @@ public class User {
     private String email;
 
     @OneToMany(mappedBy="author", cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER)
+    @JsonManagedReference
     private List<Article> articles;
 
     public User() {}

hibernate-project/src/main/java/com/humanbooster/service/AdService.java

@@ -15,8 +15,8 @@ public record AdService (AdDao adDao) {
         return adDao.read(id);
     }
 
-    public void updateAd(Ad ad) {
-        adDao.update(ad);
+    public void updateAd(Long id) {
+        adDao.update(id);
     }
 
     public void deleteAd(Long id) {
@@ -24,6 +24,6 @@ public record AdService (AdDao adDao) {
     }
 
     public List<Ad> getAllAds() {
-        return adDao.findAll();
+        return adDao.getAll();
     }
 }

hibernate-project/src/main/java/com/humanbooster/service/ArticleService.java

@@ -15,8 +15,8 @@ public record ArticleService(ArticleDao articleDao) {
         articleDao.read(id);
     }
 
-    public void updateArticle(Article article) {
-        articleDao.update(article);
+    public void updateArticle(Long id) {
+        articleDao.update(id);
     }
 
     public void deleteArticle(Long id) {
@@ -24,7 +24,7 @@ public record ArticleService(ArticleDao articleDao) {
     }
 
     public List<Article> getAllArticles() {
-        return articleDao.findAll();
+        return articleDao.getAll();
     }
 
     public Article findArticleByAuthor(String author) {

hibernate-project/src/main/java/com/humanbooster/service/UserService.java

@@ -15,8 +15,8 @@ public record UserService (UserDao userDao) {
         userDao.read(id);
     }
 
-    public void updateUser(User user) {
-        userDao.update(user);
+    public void updateUser(Long id) {
+        userDao.update(id);
     }
 
     public void deleteUser(Long id) {
@@ -24,7 +24,7 @@ public record UserService (UserDao userDao) {
     }
 
     public List<User> getAllUsers() {
-        return userDao.findAll();
+        return userDao.getAll();
     }
 
     public User findUserByEmail(String email) {

hibernate-project/test.http

@@ -0,0 +1,14 @@
+### GET request to example server
+GET http://localhost/users
+
+###
+POST http://localhost/users/
+Content-Type: application/json
+
+{
+  "name": "John Doe",
+  "email": "john.doe@example.com"
+}
+
+###
+DELETE http://localhost/articles/13