About Data Set

forum_thread

Entity Update - Is the documentation up to date?

I'm working on my first ObjectDB project, and I just went back and reviewed some of the documentation.  Turns out I've been doing two things that http://www.objectdb.com/java/jpa/persistence/update suggests should not work. First, I've been modifying managed entities from outside an active transaction.  If I subsequently begin and commit a transaction, all my changes seem to be merged automatically. ... (e.g. ArrayList ) over arrays except for storing data (such as images) in byte[] . Enhancement is usually more ...

 
forum_thread

connect with server

how to connect the data base on a remote server and share odbc in object db ... how to connect the data base on a remote server and share odbc in object db ... server and make client in the network can share the data base i want to know the right connection string. i used ...

 
api-jdo

setConnectionUserName(userName)

Set the user name for the data store connection.(Method of javax.jdo.PersistenceManagerFactory)

 
issue

Navigation through lazy loading from Detached Objects

A main limitation of detached objects (as explained on the Detached Entities manual page) is: ... application, especially from JSF, pulling very complex data and relationships as and when needed. We do not want to write 1000s ... new system property ( "objectdb.temp.no-detach" ) can be set to disable detachment of objects. Basically that is what EclipseLink does. ...

 
forum_thread

Server closes if large query runs out of memory

We are using ObjectDB in production, and have found what we thing to be a serious problem:  the objectdb server can run out of memory and stop if a query deals with too many objects. This isn't the behaviour we expected for a product that we want to use to deliver 24/7 high-volume data collection. ObjectDB surely has some idea of the sizes of objects that it persists and retrieves, and so should be able to fail safely if it finds too many objects being retrieved to fit into memory. There must be some alternative to crashing! ... a product that we want to use to deliver 24/7 high-volume data collection. ObjectDB surely has some idea of the sizes of objects ... during JDO deletion query, and the temp threshold was set and was low (64mb).  There is an easy work-around, which is to divide ...

 
api-jdo

setConnectionDriverName(driverName)

Set the driver name for the data store connection.(Method of javax.jdo.PersistenceManagerFactory)

 
api-jdo

setConnectionFactoryName(connectionFactoryName)

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

 
api-jdo

setConnectionFactory2Name(connectionFactoryName)

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

 
forum_thread

Replication failed

Dear support members, I am trying to set up a replication url in objectdb.conf and have the the following error in the log files: [ObjectDB 2.3.4] javax.persistence.PersistenceException Failed to connect to server 127.0.0.1:6136 (Connection refused) (error 522) at com.objectdb.jpa.EMF.createEntityManager(EMF.java:176) My objectdb.conf: ... Dear support members, I am trying to set up a replication url in objectdb.conf and have the the following error in ... port = "6136" max = "200" /> <data path = "$objectdb/db-files" /> <replication url ...

 
forum_thread

Multi-thread access to single EM's entities

If my entity classes have synchronized getters and setters, is it reliable for multiple threads to access a single EM's managed entities, as long as only the thread that created the EM interacts directly with it?  I've tested this and it seems to work... but I know better than to depend on the observable behavior of multithreaded code. When I run this example and examine the database, the entity contains the value set by the second thread, as expected.   ... and examine the database, the entity contains the value set by the second thread, as expected.   import javax. ... application: a client that parses and stores data from the ancient text-based game TradeWars 2002. ...