About store

forum_thread

TimeSeries and ObjectDB

Hi, I am using ObjectDB for storing TimeSeries (large ones) - when I get new points to add to the TimeSerie entity - I currently have to retrieve the whole timerserie since beginning of time, then add the new points, and then commit the whole timeserie again. I looked at Update queries - but they seem to be handling simple tasks - like multiply one field of the entity by a constant. More generally: 1- is ObjectDB suitable for large time series? 2/ If so - any example would be helpful - on how to organise the data. ... According to your question it seems that you store an entire time series in an entity object. This could be efficient it ...

 
tutorial

Step 3: Define an EJB Session Bean

Explains how to define an EJB session bean in an Eclipse Java EE 6 web application. Operations on the database will be performed by an instance of a session bean (EJB) class that we will define in this step: Open the [New Java Class] dialog box by right clicking the guest package node (in the [Package Explorer] window) and selec ...

 
issue

Minor grammatical error in Tutorial

http://www.objectdb.com/tutorial/jpa/eclipse/running As is: "Running the application again will use the existing database file to store additional 1,000 objects." Recommended: Running the application again will use the existing database file to store an additional 1,000 objects. ... application again will use the existing database file to store additional 1,000 objects." Recommended: Running the application again will use the existing database file to store an additional 1,000 objects. Meetings are Toxic ...

 
api-jdo

Element.column

Name of the column to store the element in.(Annotation Element of javax.jdo.annotations.Element)

 
api-jdo

Value.serialized

Whether the value is to be stored serialized (into a single column of a join table).(Annotation Element of javax.jdo.annotations.Value)

 
issue

Issue with TYPE expression in Criteria API

Find attached project using latest 2.3.4_03 odb still causes:   ... javax.persistence.PersistenceException Attempt to store an instance of a non persistable type java.lang.Class (error 303) at ... by: com.objectdb.o.UserException: Attempt to store an instance of a non persistable type java.lang.Class at ...

 
issue

[ObjectDB 2.4.3_07] Unexpected exception (Error 990)

[2012-10-05 13:14:18 #7 store] Database '/home/glassfish/objectdb-2.4.3_07/db/test.odb' is opened by 7042@edi-gui-sbr-devel ... [2012-10-05 13:14:18 #7 store] Database '/home/glassfish/objectdb-2.4.3_07/db/test.odb' is ... [2012-10-05 13:45:17 #9 store] Database '/home/glassfish/objectdb-2.4.3_07/db/test.odb' is ...

 
api-jdo

setConnectionFactory2(connectionFactory)

Set the second data store connection factory.(Method of javax.jdo.PersistenceManagerFactory)

 
api-jdo

fetchCharField(fieldNumber)

Fetch one field from the field manager.(Method of javax.jdo.spi.PersistenceCapable.ObjectIdFieldSupplier)

 
api-jdo

fetchStringField(fieldNumber)

Fetch one field from the field manager.(Method of javax.jdo.spi.PersistenceCapable.ObjectIdFieldSupplier)