About multiplication

issue

ObjectDB-ObjectDB Replication

ObjectDB Replication will enable managing the same ObjectDB database using multiple ObjectDB servers / nodes. ... Feature Request Version: Priority: Normal Status: Fixed Replies: 1 Type:  Feature Request ...

 
api-jdo

Joins.value

The join definitions used for the mapping of this type.(Annotation Element of javax.jdo.annotations.Joins)

 
manual

JPA Query Expressions (JPQL / Criteria)

Describes JPA query (JPQL / Criteria API) expressions (literals, operators and functions).... (.) Arithmetic operators : * (multiplication), / (division), + (addition) and - (subtraction). ...

 
forum_thread

Evaluating ObjectDB for SaaS Application

We are currently evaluating objectdb for our SaaS(multi-tenant) product. It is a data intensive health care product . We would like to know the horizontal scalability options available. #1 2012-10-18 16:32 We are currently evaluating objectdb for our SaaS(multi-tenant) product. It is a data intensive health care produ ...

 
forum_thread

Cascading persistence through an inverse field

Hi! I was playing with cascading persistence with @ManyToMany and inverse @ManyToMany fields, and I noticed that I can only get cascading persistence in one direction. If the "owner" of the relationship is persistent, then objects that are added to the relationship are automatically made persistent. However, I can not get this to work the other way around. I would also like the relationship owner to be persisted if a persisted object is added on the owner side. I have included a minimal example: #1 2017-10-08 15:50 Hi! I was playing with cascading persistence with @ManyToMany and inverse @ManyToMany fields, a ...

 
forum_thread

Is it possible to commit only specific elements?

Hello, As stated above, I would like to know if it is possible to commit only specific elements, or at least update a single table, disregarding the other entities loaded in the persistency context? I have a complex hierarchy of intertwined objects. Currently I am clearing my persistency context, retrieving only the needed ones, creating new ones (which I want to commit), detaching the ones I've previously retrieved and finally committing. My context is big data and performance is an issue.      #1 2015-07-24 11:13 Hello, As stated above, I would like to know if it is possible to commit only specific elements, or at le ...

 
forum_thread

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. #1 2012-03-03 09:32 Is there some easy way to force recreation/deletion of the current database on deployment of a web application (t ...

 
forum_thread

Query for objects persisted within the same transaction

I have a question concerning reading uncommited entities with query, within active transaction. For example, I read data from file. Each line contains value of one of entity's attributes but those values are not unique, so it's possible to have a multiple instances of the same entity. To eliminate duplicates, after reading every line I first check using a query, if an entity with that attribute value already exists. If no - I create one and persist it. #1 2011-01-31 13:47 I have a question concerning reading uncommited entities with query, within active transaction. For examp ...

 
api-jdo

jdoMakeDirty(fieldName)

Explicitly mark this instance and this field dirty.(Method of javax.jdo.spi.PersistenceCapable)

 
api-jdo

getObjectById(oid, validate)

This method locates a persistent instance in the cache of instances managed by this PersistenceManager.(Method of javax.jdo.PersistenceManager)