Clash Royale CLAN TAG#URR8PPP

Retrieve primary key ID before persisting using sessionfactory in hibernate

I have used below code to get primary key in hibernate before persisting Object. But its inserting duplicate rows in DB.

The issue here I am facing is:
1. I am getting two values for primary key. One when I invoke the flushPerson() method to get 'id' before persisting Person Object.
2. Other when I invoke save method, to save Person object. In this method also 'Id' is getting incremented.

PersonController.java

public Person createNewPerson(String .....)
Person per = new Person();
personManager.flushPerson(per);
RandomNumberGenerator rng = new RandomNumberGenerator();
String randomStrng = rng.generateRandomNumber();
String cientCode = per.getId()+randomStrng;
per.setPersonClientCode(cientCode);
per.setPersonClient();
per.setPersonField();
personManager.save(per);



PersonHibernateDao.java

@Override
public void flushPerson(Person per)
sessionFactory.getCurrentSession().persist(per);
sessionFactory.getCurrentSession().flush();


@Override
public void save(Person per)
sessionFactory.getCurrentSession().save(per);



What am I missing here? I want to save object with only primary key 'id' that is created in flush method and it should insert only one row.

1 Answer
1

Change your save method to:

@Override
public Person save(Person per)
return sessionFactory.getCurrentSession().save(per);



Then, in PersonController you can do:

PersonController

Person per = new Person();
//whatever Mutators you need
per = personManager.save(per);
//Now you can get id and no duplicate rows will be inserted


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