About @Entity

forum_thread

large numbers of records

Hi, does anyone have experience with database with more than billion records (ie. more than 1000 million records) in one table. What is the limit of ObjectDB and is the database still fast. We are planing to do an application which handles document records and there metadata. #1 2016-04-11 15:52 Hi, does anyone have experience with database with more than billion records (ie. more than 1000 million records) ...

 
forum_thread

Explorer doesn't open file

Explorer doesn't open file...see attached error message and odb.  Explorer doesn't cleanly close the connection either (due to error I presume). Many thanks Russ #1 2017-02-16 10:28 Explorer doesn't open file...see attached error message and odb.  Explorer doesn't cleanly close the ...

 
issue

Exception in thread "main" java.lang.NoSuchFieldError: __odbTracker

Hi   there is something wrong with enhancement process I got that class was succesfully processed, log has size 0, enhancer is from build objectdb-2.2.8_08 and during object creation when some filed is initialised i got an exception   Exception in thread "main" java.lang.NoSuchFieldError: __odbTracker at com.package.Network.__odbSet_Connections(Network.java:1) at com.package.Network.<init>(Network.java:95) at com.package.EnhancementTest.main(EnhancementTest.java:14)   Bug Version: 1.04 Priority: Normal Status: Closed Replies: 3 Type:  Bug ...

 
tutorial

Step 4: Create an ObjectDB Data Set

Explains how to create an ObjectDB data set for BIRT reports. Queries against the database are represented in BIRT as data sets. To create the data set: Open the [New Data Set] dialog box by right clicking the Data Sets node in the [Data Explorer] window and selecting New Data Set ...

 
tutorial

Step 3: Define a Spring DAO Component

Explains how to define a JPA DAO component (bean) in a NetBeans Spring MVC JPA web application project. Operations on the database will be performed by an instance of a Data Access Object (DAO) that we will define in this step as a Spring MVC component: Open the [New Java Class] dialog box by right clicking the guest packa ...

 
forum_thread

EntityManager.refresh takes a long time

EntityManager.refresh takes a long time for entity object Person in this code: #1 2013-08-08 15:21 EntityManager.refresh takes a long time for entity object Person in this code: logger. log ( ...

 
api-jpa

javax.persistence.PostLoad

Is used to specify callback methods for the corresponding lifecycle event.(Annotation of JPA)

 
api-jpa

JoinTable.joinColumns

(Optional) The foreign key columns of the join table which reference the primary table of the entity owning the association.(Annotation Element of javax.persistence.JoinTable)

 
api-jpa

getCriteriaBuilder()

Return an instance of CriteriaBuilder for the creation of CriteriaQuery objects.(Method of javax.persistence.EntityManagerFactory)

 
forum_thread

Query to search for common elements in two separate collections.

I'm trying to work out the most efficient way to build a query that can compare two collections for identical members. Something like: "SELECT o FROM Object o WHERE o.someCollection CONTAINS MEMBER OF :someCollection" Is something like this possible in the JPA spec? #1 2013-01-12 10:42 I'm trying to work out the most efficient way to build a query that can compare two collections for identical ...