About database

forum_thread

explorer NullPointerException

I studied ObjectDB a few hours ago and got some problems when use explorer . I run it and right-click in 'Open local database' window,and the all the pop menu item is gray and disabled,such as ‘new database’,'new directory','cut','copy' ... if I click 'tools---oprions' before open database, the errot I got is: [2012-05-21 09:51:11 #1 explorer] java.lang.NullPointerException at com.objectdb.o.CNC.p(CNC.java:253) at com.objectdb.o.EHL.d(EHL.java:55) at com.objectdb.o.VPN.(VPN.java:60) at com.objectdb.o.OPD.(OPD.java:69) at com.objectdb.o.OPD.(OPD.java:42) ... I run it and right-click in 'Open local database' window,and the all the pop menu item is gray and disabled,such as ‘new database’,'new directory','cut','copy' ... ...

 
release

2.3.0

... JPQL queries. Added support of ";drop" database url parameter. Adjusted the Enhancer to the new Java 7 ... exceptions. Improved support of non standard database file suffixes. Changed fetch of collection elements. ...

 
forum_thread

ObjectDB version 2.3 has been released

ObjectDB 2.3 has been released and it includes important additions and fixes: ... JPQL queries. Added support of ";drop" database url parameter. Adjusted the Enhancer to the new Java 7 ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
api-jpa

javax.persistence.EntityManager

Interface used to interact with the persistence context.(Interface of JPA)

 
release

2.3.2

... JPQL queries. Added support of ";drop" database url parameter. Adjusted the Enhancer to the new Java 7 ... exceptions. Improved support of non standard database file suffixes. Changed fetch of collection elements. ...

 
issue

NullPointerException in ENH.g(ENH.java:401)

Hello, corresponding to your suggestion I created a private ticket in reply to http://www.objectdb.com/database/forum/1109. Attached you will find my database file (I removed most of the content but one corrupt instance is still included). ... a private ticket in reply to http://www.objectdb.com/database/forum/1109. Attached you will find my database file (I removed most of the content but one corrupt instance is still ... "Participant" is correct there must be some issue with the database file (before deleting all other entities of type "Event" I could not ...

 
forum_thread

Processing thread count for 8-core server

In reference to the information here:  http://www.objectdb.com/java/jpa/setting/database#The_processing_element_   We are working with an 8-core processor.  The recommended thread count is "more than the number of cores but not too many."  What would be an appropriate number of threads for the processing thread pool in order to get good performance for our 8-core server? ... here:  http://www.objectdb.com/java/jpa/setting/database#The_processing_element _   We are working with ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) edit ...

 
forum_thread

@Transient

Hello, I have a persistent class which looks something like this: @Entity public class Test { private String string; private Date date; @Transient private boolean test; // getters/setters } When I persist the class the transient 'boolean test' is stored in the database, maybe I am doing it wrong but I expect... the class the transient 'boolean test' is stored in the database, maybe I am doing it wrong but I expect the 'boolean test' is not stored in the database because it's a (annotated) transient field? Regards, ...

 
manual

DELETE Queries in JPA/JPQL

Explains how to apply server side bulk delete using a JPA/JPQL query.... chapter 2 , entity objects can be deleted from the database by: Retrieving the entity objects into an ... cascading operation. Applying changes to the database by calling the commit method. JPQL DELETE queries ...

 
forum_thread

Vacuum - Reclaiming Unused Space In Odb

I was curious if you could assist me with a challenge we are having with our objectdb database.  Our odb files are about 50Gb in size and are written to about a million times a day with both adds and updates.  This is creating a lot of unused space in the database that we are wanting to reclaim.  Other database vendors provide a vacuum process to allow dumping a database to a flat file (basically a sql dump) and reload.  Is there a capability in ObjectDb to provide a vacuum?  The online backup feature appears to copy the dead space as well so isn't performing... assist me with a challenge we are having with our objectdb database.  Our odb files are about 50Gb in size and are written to about a ... This is creating a lot of unused space in the database that we are wanting to reclaim.  Other database vendors provide a ...