About JDO

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Upgrade to 2.4.1_01

Hi, We tried to upgrade from 2.3.7_18 to 2.4.1_01 to pickup some fixes. We discovered that our code no longer works when using 2.4.1_01. We did some probing and found one thing. I have attached the unit test to display this issue. The problem seems to be the annotation at line 266 in the test. In our code for 2.3.7_18, we had @OneToOne(cascade=CascadeType.ALL, fetch=FetchType.EAGER), which is wrong, as Contactdetails is Embeddable, the annotation should be @Embedded. Neither annotation works with 2.4.1_01, with each giving a different error. ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Extra uninitialised entities spawned on merge()

In the following, Element is a base entity class, with a bi-directional @ManyToOne-@OneToMany relationship Element owner - List<Element> ownedElements, and Example is a subclass entity with a relationship @OneToOne Element child. ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Performance issues on aggregate query

we are using this aggregate query to collect some data: ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Spring + Maven + persitence.xml

Hi, I tested ObjectDB embedded and it is really fast! Everything worked out of the box. Maven: <dependency>    <groupId>com.objectdb</groupId>    <artifactId>objectdb</artifactId>    <version>2.4.3</version>   </dependency> Persistence.xml ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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ObjectDB without javax.persistence

Hello, what we need to do, that we can use a separate bundle for javax.persistence in a OSGi envoirement. We tried to use the objectdb-jee.jar instead of objectdb.jar. And a separate bundle for javax.persistence that only contains the Java Persistence API. So that the ObjectDB PersistenceProvider get visible for the JavaPersistenceAPI, we have registered the ObjectDB as Buddy. ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Weird behaviour with enhanced classes and embedded entities

Hi, I've found some weird behaviour in my project (www.tinymediamanager.org): Sometimes some entries of my ArrayLists with embedded entities are missing. I've hunted the problem down to an enhanced/proxied list in my entity which contains embedded entities and some .add(obj) are simply failing. Here is a small sscce which reproduces the issue: ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Performance tuning, best practices

we have a system where we serve from a host process around 200 clients connected via webSockets (Jetty). The core process is running on a dedicated Windows 2012 server with 16 GByte RAM and 8 processor cores.  What is strange for us is that max 20% of the cpu resources are used and the IO subsystem is at maximum 30% of activity under heavy load but database queries are let's say not at the speed we would expect. We have currently 20.000.000 objects in the database, our configuration settings are: ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Compile time enhancement using build.xml of a Netbeans web application

Does anybody have a complete, working example of the adaptations required in the build.xml of a Netbeans web application project to specify ObjectDB compile time enhancement, for both single file and whole project compilation ? The ObjectDB 2.3 manual gives the following tip: ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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EntityManager.refresh takes a long time

EntityManager.refresh takes a long time for entity object Person in this code: ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
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Jboss 6 persistence.xml startup error

Hi,   I'm trying to migrate a small EJB 3.1 project from Postgres to ObjectDb to test out feasibility, but I keep getting stuck on setting up the persistence.xml on JBoss 6 AS.   Here is my setup: ------- Start persistence.xml ------- ... Support ObjectDB - Fast Object Database for Java (JPA/JDO) Guestbook.war - Java EE 6 Guestbook tutorial ...