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hibernate-cascade task #967

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hibernate-cascade task #967

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bd817be
1) create cascades
bodya4243 Apr 4, 2024
e4ae923
1) build
bodya4243 Apr 4, 2024
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57 changes: 53 additions & 4 deletions src/main/java/core/basesyntax/dao/impl/CommentDaoImpl.java
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Expand Up @@ -3,30 +3,79 @@
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;

public class CommentDaoImpl extends AbstractDao implements CommentDao {
private Session session = null;
private Transaction transaction = null;

public CommentDaoImpl(SessionFactory sessionFactory) {
super(sessionFactory);
}

@Override
public Comment create(Comment entity) {
return null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
session.close();
return entity;
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error creating entity to the database", e);
} finally {
session.close();
}
}

@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("can't get an Entity from the DB", e);
}
}

@Override
public List<Comment> getAll() {
return null;
List<Comment> comments = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
comments = session.createQuery("FROM Comment", Comment.class).getResultList();
transaction.commit();
session.close();
} catch (Exception e) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Error retrieving all entities from the database", e);
} finally {
if (session != null) {
session.close();
}
}
return comments;
}

@Override
public void remove(Comment entity) {

try {
session = factory.openSession();
transaction = session.beginTransaction();
session.remove(entity);
transaction.commit();
session.close();
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error removing entity to the database", e);
} finally {
session.close();
}
}
}
57 changes: 53 additions & 4 deletions src/main/java/core/basesyntax/dao/impl/MessageDaoImpl.java
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Expand Up @@ -3,30 +3,79 @@
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;

public class MessageDaoImpl extends AbstractDao implements MessageDao {
private Session session = null;
private Transaction transaction = null;

public MessageDaoImpl(SessionFactory sessionFactory) {
super(sessionFactory);
}

@Override
public Message create(Message entity) {
return null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
session.close();
return entity;
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error creating entity to the database", e);
} finally {
session.close();
}
}

@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("can't get an Entity from the DB", e);
}
}

@Override
public List<Message> getAll() {
return null;
List<Message> messages = null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
messages = session.createQuery("FROM Message", Message.class).getResultList();
transaction.commit();
session.close();
} catch (Exception e) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Error retrieving all entities from the database", e);
} finally {
if (session != null) {
session.close();
}
}
return messages;
}

@Override
public void remove(Message entity) {

try {
session = factory.openSession();
transaction = session.beginTransaction();
session.remove(entity);
transaction.commit();
session.close();
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error removing entity to the database", e);
} finally {
session.close();
}
}
}
25 changes: 23 additions & 2 deletions src/main/java/core/basesyntax/dao/impl/MessageDetailsDaoImpl.java
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Expand Up @@ -2,20 +2,41 @@

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 {
private Session session = null;
private Transaction transaction = null;

public MessageDetailsDaoImpl(SessionFactory sessionFactory) {
super(sessionFactory);
}

@Override
public MessageDetails create(MessageDetails entity) {
return null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
session.close();
return entity;
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error creating entity to the database", e);
} finally {
session.close();
}
}

@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("can't get an Entity from the DB", e);
}
}
}
44 changes: 41 additions & 3 deletions src/main/java/core/basesyntax/dao/impl/SmileDaoImpl.java
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Expand Up @@ -3,25 +3,63 @@
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;

public class SmileDaoImpl extends AbstractDao implements SmileDao {
private Session session = null;
private Transaction transaction = null;

public SmileDaoImpl(SessionFactory sessionFactory) {
super(sessionFactory);
}

@Override
public Smile create(Smile entity) {
return null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
session.close();
return entity;
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error creating entity to the database", e);
} finally {
session.close();
}
}

@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("can't get an Entity from the DB", e);
}
}

@Override
public List<Smile> getAll() {
return null;
List<Smile> smiles;
try {
session = factory.openSession();
transaction = session.beginTransaction();
smiles = session.createQuery("FROM Smile", Smile.class).getResultList();
transaction.commit();
session.close();
} catch (Exception e) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Error retrieving all entities from the database", e);
} finally {
if (session != null) {
session.close();
}
}
return smiles;
}
}
63 changes: 59 additions & 4 deletions src/main/java/core/basesyntax/dao/impl/UserDaoImpl.java
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Expand Up @@ -3,30 +3,85 @@
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 {
private Session session = null;
private Transaction transaction = null;

public UserDaoImpl(SessionFactory sessionFactory) {
super(sessionFactory);
}

@Override
public User create(User entity) {
return null;
try {
session = factory.openSession();
transaction = session.beginTransaction();
session.persist(entity);
transaction.commit();
session.close();
return entity;
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error creating entity to the database", e);
} finally {
session.close();
}
}

@Override
public User get(Long id) {
return null;
try (Session session = factory.openSession()) {
Query<User> getEntityQuery = session.createQuery("from User u "
+ "left join fetch u.comments " + "where u.id = :id");
getEntityQuery.setParameter("id", id);
return getEntityQuery.getSingleResult();
} catch (Exception e) {
throw new RuntimeException("can't get an Entity from the DB", e);
}
}

@Override
public List<User> getAll() {
return null;
List<User> users;
try {
session = factory.openSession();
transaction = session.beginTransaction();
users = session.createQuery("FROM User u "
+ "left join fetch u.comments ",
User.class).getResultList();
transaction.commit();
session.close();
} catch (Exception e) {
if (transaction != null) {
transaction.rollback();
}
throw new RuntimeException("Error retrieving all entities from the database", e);
} finally {
if (session != null) {
session.close();
}
}
return users;
}

@Override
public void remove(User entity) {

try {
session = factory.openSession();
transaction = session.beginTransaction();
session.remove(entity);
transaction.commit();
session.close();
} catch (Exception e) {
transaction.rollback();
throw new RuntimeException("Error removing entity to the database", e);
} finally {
session.close();
}
}
}
9 changes: 9 additions & 0 deletions src/main/java/core/basesyntax/model/Comment.java
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@@ -1,17 +1,26 @@
package core.basesyntax.model;

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

@Entity
public class Comment {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String content;

@OneToMany(cascade = CascadeType.PERSIST)
private List<Smile> smiles;

public Comment() {
}

public Long getId() {
return id;
}
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