About change

api-jpa

refresh(entity)

Refresh the state of the instance from the database, overwriting changes made to the entity, if any.(Method of javax.persistence.EntityManager)

 
forum_thread

Can't post on your forum

Since yesterday, I can't post on the forum because it always says that I should log in in order to do that. I was already logged in, but, anyway, it appeared as not. I go to log in, then I authenticate, then I'm redirected to the home page, but it still looks that I'm not logged in, so I can't post on the forum. I tried removing the cookies, but nothing. I tried in another browser, but the same. I have new bugs to post, so it's pretty important. ... to let other users know about this problem). We had to change your password so please set your password again. We received a ... settings. This is weird because we didn't change anything in that code, just moved the website to another host.  ...

 
api-jdo

javax.jdo.InstanceCallbacks

A PersistenceCapable class that provides callback methods for life cycle events implements this interface.(Interface of JDO)

 
forum_thread

Best practice: Database update/migration of embedded databases in products

Hello Support, what experience do you have for data migration within a product? An example: There are three versions of a product (v1.0; v1.1, v2.0). In each version, the entities have been modified. Attributes added, removed and renamed. If attributes were removed, then only because the data is now held otherwise. ... - for adding and removing fields and for class hierarchy change. Configuration schema changes - for renaming packages, ... code in your application. In order to support this schema change you will have to maintain all the fields, (the old and the new) in the ...

 
forum_thread

Understanding limitations of schema evolution

Hi, I am trying to understand the limitations of schema evolution and have read the material on http://www.objectdb.com/java/jpa/entity/schema as well as the link therein regarding manual schema update when changing a field’s name Yet, i am confused regarding how to handle the case where one re-factors a class by moving one if it's Fields to a different class. Is this case managable? Thanks... and you will have to write code for making this schema change. ObjectDB Support ObjectDB - Fast Object ...

 
api-jdo

makePersistent(pc)

Make the parameter instance persistent in this PersistenceManager.(Method of javax.jdo.PersistenceManager)

 
forum_thread

Merge Issue: Attempt to reuse an existing primary key value

Hello, I have just updated my objectdb version from 2.4.6 to 2.5.5. I observed a new bug or a feature on an ordinary merge operation. This is the test case ( work in 2.4.6 version ) : 2 parents object share the same child on a ManyToMany relationship with Cascade.ALL constraint. ... After some investigation we can confirm that a change in the behavior of merge in build 2.4.6_17 affects your test case. The change was applied following a support ticket that demonstrated a strange merge ...

 
forum_thread

Complex Schema Upgrade not working

Hello, We're trying to upgrade the DB-Schema. Simplied our source/original Schema/Class-Hierarchy looked like this: class contact.Contact class customer.Customer extends contact.Contact class member.Member extends customer.Customer We have database records within each class type (Contact, Customer and Member). ... - for adding and removing fields and for class hierarchy change. Configuration schema changes - for renaming packages, ...

 
forum_thread

UserException: Invalid configuration in 'internal' - Check permissions

Hi all,   I have a master/slave code so that each slave reads a subset of points of the same database. ObjectDB entities do not allow serialization and so I have sent, to each slave, the file path. With such information I have tried to create an entityManager, in each slave, as follows: EntityManagerFatory entityManagerFactory = Persistence.createEntityManagerFactory(filePath); EntityManager = entityManagerFactory.createEntityManager(); However I get the following error ... < /span > :   Is there any way to change such permissions. I have search unsuccesfuly. The full error is given as ... on the log directory and ObjectDB Home , and either change permissions for the default log path, or change ObjectDB home, or change ...

 
forum_thread

Optimization Question

One of our uses for your ObjectDB software is in maintaining the current state of a large number of data objects called tracks. These tracks change very frequently over time (every 10-15 seconds is not unreasonable), but they are also very large complex data structures so it's extremely difficult to identify exactly what fields have changed from one update to the next. Currently the following sequence executes when a track update comes in: - If it’s a new track simply add it to the database.... a large number of data objects called tracks. These tracks change very frequently over time (every 10-15 seconds is not unreasonable), but ...