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Is ObjectDB the only object database that supports JPA?

Other Object database doesn't support JPA?   Manikandan ... features cannot be supported by regular object databases. For example, user defined ... supported by most object databases. ObjectDB does support these features.  Some object

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

another is for update data but in same object and same database. Description: i have three classes ... from class.Then here i want to do update operation with that same object and same database ... ="code">EntityManager has a private persistence context, i.e. the same database object

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

;  // Store 1000 Point objects in the database:         em ... > - How can we create the initial database structure of our application? We know objectdb is all about objects and probably doesn't need initial structure like tables, but how can we populate

Locking in JPA

object level, i.e. each database object is locked separately. Optimistic locking is applied on transaction commit. Any database object that has to be updated or deleted ... of a database object, for which another update has already been committed by another transaction.

JPA Primary Key

Every entity object that is stored in the database has a primary key. Once assigned ... the database. As an object database, ObjectDB supports implicit object IDs, so an explicitly defined ... that is absent from other object oriented databases. Entity

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 ... system unusable for a real project because it appears to be either database integrity corruption, or ... the problem, as well as screenshots. When the project runs it logs creation of objects

Object DB Explorer fails to open database

the database. But when I try to open the database using Object DB Explorer, it fails.  I have another case where Object DB Explorer fails to open database.  I ... with it. Again the code runs fine but Object DB Explorer fails to open the database

[ODB1] Chapter 3 - Persistent Classes

using JDO. Instances of these classes that represent objects in the database are called Storing a persistent object in the database does not store methods and code. Only the state of the object ... when the object is stored in the database. For example, a field whose type is Number

[ODB1] Chapter 4 - JDO Metadata

specification, are ignored by ObjectDB if specified (as a pure object database, ObjectDB always uses datastore identity with its own object-id class). 4.3  Metadata for Fields ... ="/database/jdo/manual/chapter3#persistent_fields_and_types">section 3.2. The persistence

[ODB1] Chapter 7 - JDOQL Queries

There are various ways to retrieve objects from an ObjectDB database, as shown in database/jdo/manual/chapter6#retrieving_persistent_objects">section 6.3. An Extent ... for RDBMS. It provides object retrieval from the database according to a specified selectioPlan