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forum_thread

Explorer and multi-thread

When I use explorer.exe to browse the database in objectdb, eclipse tells me another app occupy it, then how can objectdb support multi-thread? #1 2011-05-17 08:31 When I use explorer.exe to browse the database in objectdb, eclipse tells me another app occupy it, then how can ...

 
forum_thread

Explorer query functionality

Is there a way in the Explorer to associate JPQL queries with query result windows?  I would really like to be able to open multiple query / result tabbed panes and be able to save out my queries, similar to what you can do in Benthic Golden or Toad in the SQL world. Alternatively are you aware of any other JPA + JPQL workbench tools, commercial or otherwise that would support this? #1 2015-05-20 15:41 Is there a way in the Explorer to associate JPQL queries with query result windows?  I would really ...

 
forum_thread

LazyInitialization / join fetch

I have a survey that carries the tabla Items . A company has several items , a user charge and technical user also . A specialty has several technical users . Area A has a charge . What happens : When I click the Items table hibernate does all these other queries without me asking . I have a survey that carries the tabla Items . Being a company that has multiple items , a user charge and technical user also . A specialty has several technical users . Area A has a charge . What happens : #1 2013-11-04 21:22 I have a survey that carries the tabla Items . A company has several items , a user charge and technical user als ...

 
api-jdo

setResultClass(cls)

Specify the type of object in which to return each element of the result of invoking execute or one of its siblings.(Method of javax.jdo.Query)

 
forum_thread

Multi-thread access to single EM's entities

If my entity classes have synchronized getters and setters, is it reliable for multiple threads to access a single EM's managed entities, as long as only the thread that created the EM interacts directly with it?  I've tested this and it seems to work... but I know better than to depend on the observable behavior of multithreaded code. When I run this example and examine the database, the entity contains the value set by the second thread, as expected.   #1 2012-04-09 02:22 If my entity classes have synchronized getters and setters, is it reliable for multiple threads to access a singl ...

 
forum_thread

Help understanding Entity behavior with JPA

Hi Support,   We have a entity with an @Id entity which we then put into a list and store in an different entity inside a field defined as:   @OneToOne(orphanRemoval=true, cascade=CascadeType.ALL, fetch=FetchType.EAGER) private Object payload; #1 2012-12-06 11:01 Hi Support,   We have a entity with an @Id entity which we then put into a list and store in ...

 
forum_thread

@SequenceGenerator and single id in whole database

Hi, I have a question about @SequenceGenerator. I have separate @SequenceGenerator in each of my model enitities, but it looks like id's are generated using only one, shared generator. Is there any other way to use separate generators for each entity, so that each entity uses its own sequence just like in RDBM? #1 2011-01-11 14:28 Hi, I have a question about @SequenceGenerator . I have separate @SequenceGenerator in each of my ...

 
api-jpa

javax.persistence.AttributeOverride

Used to override the mapping of a Basic (whether explicit or default) property or field or Id property or field.(Annotation of JPA)

 
api-jpa

javax.persistence.AttributeOverrides

Used to override mappings of multiple properties or fields.(Annotation of JPA)

 
api-jpa

javax.persistence.AssociationOverrides

Used to override mappings of multiple relationship properties or fields.(Annotation of JPA)