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Implement DAO methods and configure cascades for entity classes #948

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Implement DAO methods and configure cascades for entity classes #948

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4 changes: 2 additions & 2 deletions src/main/java/core/basesyntax/HibernateUtil.java
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
private static SessionFactory sessionFactory = initSessionFactory();
private static final SessionFactory SESSION_FACTORY = initSessionFactory();

private HibernateUtil() {
}
Expand All @@ -18,6 +18,6 @@ private static SessionFactory initSessionFactory() {
}

public static SessionFactory getSessionFactory() {
return sessionFactory;
return SESSION_FACTORY;
}
}
56 changes: 52 additions & 4 deletions src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java
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Expand Up @@ -3,7 +3,10 @@
import core.basesyntax.dao.CommentDao;
import core.basesyntax.model.Comment;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.query.Query;

public class CommentDaoImpl extends AbstractDao implements CommentDao {
public CommentDaoImpl(SessionFactory sessionFactory) {
Expand All @@ -12,21 +15,66 @@ public CommentDaoImpl(SessionFactory sessionFactory) {

@Override
public Comment create(Comment entity) {
return null;
Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException(
"Failed to create comment: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
return entity;
}

@Override
public Comment get(Long id) {
return null;
try (Session session = factory.openSession()) {
return session.get(Comment.class, id);
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve comment with id: " + id, e);
}
}

@Override
public List<Comment> getAll() {
return null;
try (Session session = factory.openSession()) {
String hql = "FROM Comment";
Query<Comment> query = session.createQuery(hql, Comment.class);
return query.getResultList();
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve all comments", e);
}
}

@Override
public void remove(Comment entity) {

Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.remove(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException(
"Failed to remove comment: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
}
}
54 changes: 50 additions & 4 deletions src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java
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Expand Up @@ -3,7 +3,10 @@
import core.basesyntax.dao.MessageDao;
import core.basesyntax.model.Message;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.query.Query;

public class MessageDaoImpl extends AbstractDao implements MessageDao {
public MessageDaoImpl(SessionFactory sessionFactory) {
Expand All @@ -12,21 +15,64 @@ public MessageDaoImpl(SessionFactory sessionFactory) {

@Override
public Message create(Message entity) {
return null;
Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Failed to create message: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
return entity;
}

@Override
public Message get(Long id) {
return null;
try (Session session = factory.openSession()) {
return session.get(Message.class, id);
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve message with id: " + id, e);
}
}

@Override
public List<Message> getAll() {
return null;
try (Session session = factory.openSession()) {
String hql = "FROM Message";
Query<Message> query = session.createQuery(hql, Message.class);
return query.getResultList();
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve all messages", e);
}
}

@Override
public void remove(Message entity) {

Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.remove(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Failed to remove message: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
}
}
27 changes: 25 additions & 2 deletions src/main/java/core/basesyntax/dao/impl/MessageDetailsDaoImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,9 @@

import core.basesyntax.dao.MessageDetailsDao;
import core.basesyntax.model.MessageDetails;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

public class MessageDetailsDaoImpl extends AbstractDao implements MessageDetailsDao {
public MessageDetailsDaoImpl(SessionFactory sessionFactory) {
Expand All @@ -11,11 +13,32 @@ public MessageDetailsDaoImpl(SessionFactory sessionFactory) {

@Override
public MessageDetails create(MessageDetails entity) {
return null;
Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Failed to create message details: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
return entity;
}

@Override
public MessageDetails get(Long id) {
return null;
try (Session session = factory.openSession()) {
return session.get(MessageDetails.class, id);
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve message details with id: " + id, e);
}
}
}
36 changes: 33 additions & 3 deletions src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java
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Expand Up @@ -3,7 +3,10 @@
import core.basesyntax.dao.SmileDao;
import core.basesyntax.model.Smile;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.query.Query;

public class SmileDaoImpl extends AbstractDao implements SmileDao {
public SmileDaoImpl(SessionFactory sessionFactory) {
Expand All @@ -12,16 +15,43 @@ public SmileDaoImpl(SessionFactory sessionFactory) {

@Override
public Smile create(Smile entity) {
return null;
Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Failed to create smile: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
return entity;
}

@Override
public Smile get(Long id) {
return null;
try (Session session = factory.openSession()) {
return session.get(Smile.class, id);
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve smile with id: " + id, e);
}
}

@Override
public List<Smile> getAll() {
return null;
try (Session session = factory.openSession()) {
String hql = "FROM Smile";
Query<Smile> query = session.createQuery(hql, Smile.class);
return query.getResultList();
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve all smiles", e);
}
}
}
54 changes: 50 additions & 4 deletions src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,10 @@
import core.basesyntax.dao.UserDao;
import core.basesyntax.model.User;
import java.util.List;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.query.Query;

public class UserDaoImpl extends AbstractDao implements UserDao {
public UserDaoImpl(SessionFactory sessionFactory) {
Expand All @@ -12,21 +15,64 @@ public UserDaoImpl(SessionFactory sessionFactory) {

@Override
public User create(User entity) {
return null;
Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Failed to create user: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
return entity;
}

@Override
public User get(Long id) {
return null;
try (Session session = factory.openSession()) {
return session.get(User.class, id);
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve user with id: " + id, e);
}
}

@Override
public List<User> getAll() {
return null;
try (Session session = factory.openSession()) {
String hql = "FROM User";
Query<User> query = session.createQuery(hql, User.class);
return query.getResultList();
} catch (Exception e) {
throw new RuntimeException("Failed to retrieve all users", e);
}
}

@Override
public void remove(User entity) {

Session session = null;
Transaction transaction = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.remove(entity);
transaction.commit();
} catch (Exception exception) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Failed to remove user: " + entity, exception);
} finally {
if (session != null) {
session.close();
}
}
}
}
4 changes: 4 additions & 0 deletions src/main/java/core/basesyntax/model/Comment.java
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@@ -1,15 +1,19 @@
package core.basesyntax.model;

import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.ManyToMany;
import java.util.List;

@Entity
public class Comment {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String content;
@ManyToMany
private List<Smile> smiles;

public Long getId() {
Expand Down
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