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Forum
10

em.flush(); em.clear(); loosing data and not persisting managed objects

objects to database. Sometimes it does other times it doesn't. Here is my Entity. import javax ... .objectdb.com/database/issue/new com.objectdb.o.InternalException: null com.objectdb.o ... tracking management system called CMVC, since I don't have direct access to that database
Forum
10

OutofMemory error with Object DB 2.0

after persisting 200 records and then the same transaction object from the same PersistentManager ... .commit(EMImpl.java:279) at com.anritsu.eu.database.DatabaseImplementation.storeItem(Unknown Source) at com.anritsu.eu.database.DatabaseMessageStorer.newItemParsed(Unknown Source) at com.anritsu.eu
Manual
10

JPA Named Queries

" that retrieves all the Country objects in the database: @NamedQuery(name="Country.findAll", query ... all the entity classes that have objects in the database. However, an attempt to use a named query ... mainly for Object Relational Mapping (ORM) JPA providers and less so when using ObjectDB
Forum
10

Speed of queries that return many objects

a standard database (or object database) activity. The main idea of a database is that large amount of data ... if this is something I should investigate. So I created a database with 1_000_000 dummy entities (example ... and tuning it could be in the range of 1-2 seconds. The overhead of preparing entity objects
Issue
10

new objects not available in mappedBy associations

when the object is retrieved from the database again. Try to refresh the department object ... already contains a value - it will not be run again unless the object is retrieved again from the database ... > employees;   creating a new mapped class, e.g. new Employee, won't result in this object being available in
Forum
10

Entity listener - event instead of object

entity from database to check for difference in object fields? It should be something like creating ... in updated entity. There is a problem however with accessing "old" version of object stored in database. I can't find the nice way to use EntityManager in EntityListener. Because of that, I can't
Manual
10

ObjectDB Developer's Guide

, retrieve, update and delete database objects. Explains how to use the JPA Query Language (JPQL). Presents ... Welcome to ObjectDB for Java/JPA Developer's Guide. Here you can learn how to develop database ... the following six chapters: Demonstrates basic database programming using ObjectDB and JPA. Shows
Tutorial
10

Step 3: Add a Context Listener Class

The Guest entity objects will be stored in an ObjectDB database, which will be represented by ... a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created ... . The database will be closed when the web application stops (or when the web server shuts down), by
Tutorial
10

Step 3: Add a Context Listener Class

The Guest entity objects will be stored in an ObjectDB database, which will be represented by ... a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created ... . The database will be closed when the web application stops (or when the web server shuts down), by
Forum
10

Queries are slow on a large database

out: how to get the total number of object in a database without retrieving everything? Alternatively ... Hi, I have a 12GB database with 787603 entries. It is much larger than usual ... have to scan the entire database file and is not using indexes. Therefore I think I am not doing