About managed


No Entity Class API

Both JPA and JDO are based on accessing and managing data in the database using persistable classes (mainly entity classes in JPA or persistence capable classes in JDO). Sometimes, it might be useful to access data without classes. For example, a tool that finds and replaces strings in the database should be generic and should not be bound to specific entity classes and persistent fields. An API for accessing (and maybe also modifying) data in the database without classes can be useful in some applications. Feature Request Version: Priority: Normal Status: Active Replies: 3 Type:  Feature Request ...


Server Configuration

Explains how to set a JPA/JDO database server using ObjectDB, the fast Java object database for JPA/JDO. The < server> configuration element specifies settings for running an ObjectDB Server . The server is affected also by other elements in the configuration file, particularly the <users> and the <ssl> configurat ...


CM Transaction Implementation

Hi, How to implement Container Managed Traction using Glassfish / Weblogic server. Please provide us the step by step instruction, how ti achieve it   thanks you     ... Hi All, How to implement Container Managed Transaction using Glassfish / Weblogic server. Please provide ...


Is ObjectDB scalable? What are its limitation?

ObjectDB is highly scalable and can manage efficiently databases in a wide range of sizes, from a few Kilobytes to hundreds of Gigabytes and even Terabytes. ObjectDB can be used in small embedded single user applications as well as in heavy loaded mu ...



Specifies the enum type for a map key whose basic type is an enumerated type.(Annotation of JPA)



Make an instance transient, removing it from management by this PersistenceManager.(Method of javax.jdo.PersistenceManager)


Refresh data in application after database data has changed

Hi, I have a Java program that can manage and create some Person objects. When I start my application and I want to add a person with the same national number as a person already in the database, my program has to block the creation. #1 2012-07-03 14:05 Hi, I have a Java program that can manage and create some Person objects. When I start my application and ...


nonBinaryCompatibleGet(pc, sibr)

Return an object associated with a non-binary-compatible instance.(Method of javax.jdo.spi.JDOImplHelper)



The name of the persistence manager factory element in the JDO configuration file.(Static Field of javax.jdo.Constants)



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