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Java Hibernate Basics Persisting Data with Hibernate Retrieving Data with Hibernate

Thomas Salai
Thomas Salai
4,389 Points

retrieving-data-with-hibernate Challenge Task2 compiler error

I dont know why I got this compiler error..

./LanguageRepository.java:13: error: cannot find symbol
    Session session = sessionFactory.openSession();
                      ^
  symbol:   variable sessionFactory
  location: class LanguageRepository
Note: ./LanguageRepository.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
LanguageRepository.java
import java.util.List;
import java.util.ArrayList;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Criteria;

public class LanguageRepository {
  // Assume sessionFactory has been initialized properly by its default constructor
@SuppressWarnings("unchecked")
  public List<Language> findAll() {
    // Open session
    Session session = sessionFactory.openSession();

    // TODO: Create Criteria
    Criteria criteria = session.createCriteria(Language.class);

    // TODO: Get a list of all persisted Language entities
    List<Language> languages = criteria.list();

    // Close the session
    session.close();

    // Return the list
    return languages;
  }
}

1 Answer

Joe Rowe
Joe Rowe
2,225 Points

This error occurs as your class does not contain a variable named "sessionFactory".

To resolve this, you need to initialise a SessionFactory. The best place to do this is under the comment reading "Assume sessionFactory has been initialized properly by its default constructor" - that is to say, assume that by using the default SessionFactory constructor that a SessionFactory will be initialised correctly.

With this done, your class will contain a SessionFactory object stored as "sessionFactory" and you will then be able to call the openSession() method on that object!

Michael Walker
Michael Walker
45,428 Points

Um, in other words just add this line

private static final SessionFactory sessionFactory = new SessionFactory();