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5

Using the wrong class to access a database

(); } static void create(EntityManager em) { em.getTransaction().begin(); for (int i = 0; i < 1000 ... = query.getResultList(); em.getTransaction().begin(); for (Point p : results) { if (p
5

em.flush(); em.clear(); loosing data and not persisting managed objects

(); } public void doit() { String sbs = "This is a test String"; em.getTransaction().begin ... system (DRCS) like hg and git. But before that can begin I have to import these csv files into a real
5

Issue with orphanRemoval and multiple EntityManagers

.getTransaction().begin();                        em.persist(newOrganisation);         em.getTransaction ... .com"));         em.getTransaction().begin();         //em.merge(originalOrganisation);         em
4

Replicated cluster recovery

Currently the slave servers are limited to read only (it is indicated at the beginning of the page
4

Running ObjectDB on a node that does not have internet connectivity

="UTF-8" ?> support Support The package.jdo files already begin with the line: <?xml version="1.0
4

Primary key generation problem after changing entity package

");         EntityManager em = emf.createEntityManager();         em.getTransaction().begin();         em.persist
4

TimeSeries and ObjectDB

Hi, I am using ObjectDB for storing TimeSeries (large ones) - when I get new points to add to the TimeSerie entity - I currently have to retrieve the whole timerserie since beginning of time, then add the new points, and then commit the whole timeserie again. I looked at Update queries
4

Listing large number of complicated objects with paging.

");         EntityManager em = emf.createEntityManager();                 em.getTransaction().begin
1

Schema-Update: Rename superclass and remove one subclass

(); // // Persist an entity em.getTransaction().begin(); ChildClassA entity1 = new ChildClassA ... (RenamedSuperClass.class); em.getTransaction().begin(); // do something ChildClassA entityWithID1
0

Eager Fetch of Map with Entities as Keys

.createEntityManager();         em.getTransaction().begin();         MyEntity entity = new MyEntity

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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