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7

migration path from JPA / Hibernate

. Notice that the JPA 2 criteria query API is now fully supported (relevant documentation will be released in a few days). If your application uses old Hibernate API / extensions (e.g. Session instead
5

Which version of JDO should I use with ObjectDB?

I have defined a number of JDO indexes on my persistent class, so would like to know which is the preferred version of JDO to use e.g. is it jdo-api-3.1.jar? Thank you paul Paul Hudson ObjectDB 2.x uses JDO 2.2. support Support
5

Pessimistic Lock Timeouts setting

Hi, I realise that JPA2 doesn't necessarily define a standard API way for Lock Timeouts. However, there is a standardised query 'hint' that can be setup to make the underlying DB lock a record for a specific time. The hint property is: "javax.persistence.lock.timeout" I have a situation
5

NontransactionalWrite error using Collections.sort .

Hi, i started to use ObjectDB today and i'm having problem using command Collections.sort in persisted object. Attempt to modify an object with no active transaction when NontransactionalWrite is disabled: br.ufpa.linc.MetriX.api.model.Interface#105 (error 635) I don't want to modifi de object in
5

Double persist of Entity field with Cascade.ALL

. A Java Class Library (Book_dberror_Libs). In Netbeans, I added the Java EE 6 API Library from Netbeans
5

Get database schema from objectDB file

I am a little bit confused about that Can someone explain what steps do I have to do in order to get the database schema in java given only the objectdb file? i.e. database.odb ezazop Akis Zazopoulos See the JPA Metamodel API. support Support
5

Missing (null) elements in eager loaded references

with the parallel stream but the steam api. If I change it to a normal stream or for each it works, as welll if I
5

package not found running ObjectDB under OSGi

provide an API for locating all the classes in a package. ObjectDB can still locate classes
5

Multi selection and distinct in a criteria query

hi, How can I realize multi selection with the criteria api concerning distinct? I.e. doing something like SELECT DISTINCT $1, $2 wouldn't work because I do only have something like criteria.multiselect(...) and nothing like builder.distinct(selection) so that I could do something like criteria
1

auto-generated uuid fields

/api/java/jdo/annotations/IdGeneratorStrategy which lists the UUIDHEX and UUIDSTRING strategies

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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