About embedded


Unexpected exception (Error 990) - NullPointerException

I'm using Version 2.5.4_05 Maybe this Exception is created by calling em.merge()  - et least this is what I do in the named line. ... you were passing an entity object (and not a collection, embedded object, etc.) to the merge method? Apparently, sending a non ...


How force always recreate database on redeployment.

Is there some easy way to force recreation/deletion of the current database on deployment of a web application (to Glassfish). My web application uses a @Singleton @Startup bean to create and persist a test model each run. I keep getting models on top of each other on rerunning my web application. Currently, to avoid multiple models in the database, I have to undeploy from Glassfish, stop the server, delete the database file, re-start the objectdb server, re-run the web app, which is tedious. ... Thanks for your reply. I am now working in embedded mode, and am not having problems with drop anymore. In ...


Project runs in Eclipse but not when exported to runnable jar

I have a simple project that performs some stability calculations and displays a scale drawing of a model glider. I decided to use objectdb as a way to persist the values for later retrieval. The project works perfectly well when run from eclipse but nothing opens when I export to a runnable jar and execute that. No windows open, there are no eror dialogs etc. Commenting out all the code related to object db resolves the issue and the project runs, so I'm fairly sure it is something I've done relating to objectdb. ... empty one is created (accessing a database file that is embedded in a jar file is not supported by ObjectDB). You can define ...



The Query interface allows applications to obtain persistent instances, values, and aggregate data from the data store.(Interface of JDO)


can't get HashMap out of the database

I'm trying to persist an Entity containing a HashMap. It stores the data in the database OK, but the map is always empty when I get the entity out of the database again. I've reproduced this problem in a simple variation of the Guestbook tutorial: Guest class: ===================== ... 08:14 Nested embedded is supported and your new test works with version 2.3.2_05. ...


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) ... the time when I want to creat a new database,[file>open embedded],right click, but all the item of pop menu is gray and ...



No idea what happened.  A simple getResultList() opearation. DB table affected size is ~ 26000 records, physical DB file size is ~ 8.5MB Thanks for any help ! Leon log file: ------------------------------------------------------------------------------------------------------------------------ [2016-07-13 19:58:12 #1 store] Database '/home/gsi/wdsync/db/Media_wdsync.odb' is opened by 12659@server ... a JVM memory shortage problem as I'm running in an embedded system (ODROID-C1) with limited ressources. In the meantime I ...


Extending model by "common entity"

Hi, I have a question about extending working model with one, common entity, that all other entities will inherit from. For example I have 2 different entities in database with some data:... was already used with the new schema - open it once in embedded mode from your application (not using the Explorer) - after rebuilding ...


Index Definition

Describes how to define indexes in JPA entity classes and explains how indexes are used in JPQL queries.... only allowed when using embeddable classes as fields of embedded object are stored as part of the containing entity. Composite ...


JPA Composite Key make Object Db throws "Unexpected exception (Error 990)"

Hello Object Db community :) I am using this wonderful library and I caught a strange exception while testing the "composite key" feature in JPA. Let's see what I am doing : @Entity public class Book {     @EmbeddedId BookId id; } @Embeddable Class BookId {     Integer bookIdCountry;     ECountry country; } My BookId contains 2 attributes: One Integer and one enum. ... May the problem be reproduced with a simple ( not embedded Id ) key with an enum type. Here is the code : ...