About value

release

2.1.0

Release date: 2011-02-23 Download (3.89 MB) Binary:  objectdb-2.1.0.zip You should start by following a  tutorial or reading the manual ...

 
forum_thread

significant performance decrease

we are using objected in embedded mode (on OS X and WINDOWS). The database increased now to around 400000 entities of one class (database file size around 1.5 GByte). The response time of standard queries increased with this database size to an unacceptable rate (several seconds compared to around 30% when the number of entities was just half of the current). We tried to optimize the cache settings, current objectdb.conf is: <!-- ObjectDB Configuration --> <objectdb> #1 2016-03-15 14:57 we are using objected in embedded mode (on OS X and WINDOWS). The database increased now to around 400000 entitie ...

 
api-jdo

Key.uniqueKey

The name of the unique key constraint to generate.(Annotation Element of javax.jdo.annotations.Key)

 
forum_thread

Multitenancy with discriminator

Hello, I have a very large business application that makes use of the Hibernate "Filters" feature and of the EclipseLink "Single Table Multitenancy with discriminator" feature in order to implement entities filtering based on a discriminator. Here is an example of one of my business objects: public class BusinessPartner {     protected String id;     protected Domain domain;     ... } ... extra "where" on the discriminator with a list of allowed value to ANY query performed by the database engine, be it implicit or ...

 
api-jpa

diff(x, y)

Create an expression that returns the difference between its arguments.(Method of javax.persistence.criteria.CriteriaBuilder)

 
api-jdo

Element.mappedBy

Name of the member in the target class that forms a bidirectional relationship with this member.(Annotation Element of javax.jdo.annotations.Element)

 
api-jdo

PrimaryKey.columns

The column(s) for the primary key(Annotation Element of javax.jdo.annotations.PrimaryKey)

 
api-jdo

Constants.JDOCONFIG_XSD_NS

The standard JDO configuration schema namespace.(Static Field of javax.jdo.Constants)

 
api-jdo

ForeignKey.deleteAction

The delete action of this foreign key.(Annotation Element of javax.jdo.annotations.ForeignKey)

 
api-jpa

getExpression()

Return the expression to be tested against the list of values.(Method of javax.persistence.criteria.CriteriaBuilder.In)