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Issue
18

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
18

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
18

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
18

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
Manual
18

JPA Lifecycle Events

(added to the EntityManager). @PostPersist - after storing a new entity in the database (during commit or flush). @PostLoad - after an entity has been retrieved from the database. @PreUpdate ... the database (during commit or flush). @PreRemove - when an entity is marked for removal in
Forum
18

A few questions on object database design

I've been trying to model a database that stores data in an MMORPG. With ObjectDB, a lot of things ... outperforms a lot of other conventional table-oriented databases, but I'm wondering ... entities, then it seems like we are back to the table-oriented databases' design principles
Manual
16

Server Configuration

to the database (as explained in the JPA Overview section in chapter 3). The max attribute specifies ... , path, which specifies the location of ObjectDB databases that the server manages. The $objectdb ... of an ObjectDB server is similar to the document root directory of a web server. Every database file
Manual
16

Setting and Tuning of JPA Queries

since the setter methods in Query and TypedQuery support method chaining (by returning the query object on which they were invoked). Flush Mode (setFlushMode) Changes made to a database using an EntityManager ... . Therefore, before a query is executed, uncommitted database changes (if any) have to be flushed to the database in
Manual
15

WHERE clause (JPQL / Criteria API)

JPQL query that retrieves selective objects from the database. Out of the four optional clauses ... of this query defines an iteration over all the Country objects in the database using the c range ... the WHERE predicate. For entity classes with millions of objects in the database there is a huge
FAQ
15

What is the Java Persistence API (JPA)?

. Using plain old Java objects (POJO) to represent persistent data can significantly simplify database ... and objects). ObjectDB is the only database management system with built in support of the Java ... The Java Persistence API (JPA) is a standard API for accessing databases from within Java