About Object Database

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Tutorial
27

NetBeans/JPA Spring MVC Web Tutorial

is represented by a Guest JPA entity object and all the Guest entity objects are stored in an ObjectDB database. Required Software For this tutorial you will need the following software: Java JDK 6.0 (or
Manual
27

Locking in JPA

in ObjectDB (and in JPA) is always at the database object level, i.e. each database object is locked separately. Optimistic locking is applied on transaction commit. Any database object ... is being performed on an old version of a database object, for which another update has already been committed
Tutorial
26

Spring MVC and JPA Tutorial

that has signed the guestbook is represented and all the Guest entity objects are stored in an ObjectDB database. This tutorial is available in the following versions: In addition the demonstrated application is available as a Maven project:
Manual
24

FROM clause (JPQL / Criteria API)

identification variables that iterate over all the database objects of a specific entity class ... over all the Country objects in the database: SELECT c FROM Country AS c The AS keyword is optional ... is required when using multiple range variables. Iteration over about 1,000,000 database objects
Manual
23

SELECT clause (JPQL / Criteria API)

that JPA provides for managed entity objects, including transparent navigation to other database ... The ability to retrieve managed entity objects is a major advantage of JPQL. For example, the following query returns Country objects that become managed by the EntityManager em: TypedQuery
Issue
21

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

) We see that 2 Project objects were created, however in the database Explorer it lists size=0 for Project class ... because it appears to be either database integrity corruption, or it just looks like ... . When the project runs it logs creation of objects. Please note that there are 2 Project objects, and note
Forum
21

how to operate with same object but two different Thread on database.

operation with that same object and same database. --------- So, point is two different operation, two different thread,one object(we can assume one table in sql), one database. if it will possible ... with its own EntityManager has a private persistence context, i.e. the same database object
Forum
21

Is ObjectDB the only object database that supports JPA?

Other Object database doesn't support JPA?   JPA is designed as an API for Object Relational Mapping (ORM), so many JPA features cannot be supported by regular object databases. For example, user ... ), which are not supported by most object databases. ObjectDB does support these features.  Some object
Forum
21

How to define database structure and insert some initial objects from scratch

the initial database structure of our application? We know objectdb is all about objects and probably doesn't ... .createEntityManager();         // Store 1000 Point objects in the database:         em.getTransaction().begin ... jdbc driver for ETL software like Kettle? How about migrating data from another database
Issue
21

Object DB Explorer fails to open database

. The code runs fine. i.e. Role objects are getting persisted in the database. But when I try to open the database using Object DB Explorer, it fails.  I have attached all the related files.  Regards, Md ... with it. Again the code runs fine but Object DB Explorer fails to open the database.  All the related