About reference


Replicated cluster recovery

If I create a replicated database cluster as per http://www.objectdb.com/java/jpa/tool/replication what is the behaviour of the master database after a failure? For example, say I have MasterDB and SlaveDB in the cluster. If MasterDB goes offline the application will automatically switch to SlaveDB. When MasterDB comes back online it will have missed any activity that occured during the downtime. ... - between a main url and backup urls, which may also reference databases on different nodes. ObjectDB ...


IDs of Entities suddenly became UUIDs?

Hi, We're having our system with ObjectDB 2.4.5 in production since this year April and it works just fine. However, now we've discovered that suddenly partial Objects in some DBs in production do have a UUID String as their id instead of Long which is of course causing a lot of troubles. Note that this even occurrs on the same "Table" -- some saved Entitities of same type do still have a Long ID, others a String UUID. Our Base-Entity everything inherits from is declared as usual with Long: ... For example, changing IDs may affect other objects that reference these objects. If we can get access to the database maybe we can try ...


Saving custom list which implements java.util.List fails

Hi, I'm evaluating ObjectDB for storing Objects modeled with Eclipse Modeling Framework (EMF) and encountered the following problem:   I took the Point-example from the tutorial and added a list-attribute which is declared as java.util.List but the actual Object MyList just extends ArrayList as shown below. ... class will implement java.util.List and will have a reference to  java.util.ArrayList  instance as a persistent field. ...


Changing existing objects from Entity to Embedded

Hi, I realised that I have a mistake (from application logic point of view) in one of my JDO metadata files: ... you must declare classes as embeddable (rather than the reference fields as in ObjectDB 1.0), either by annotation ( @Embeddable ... and share the identity of the entity. See JavaDoc Reference Page... ) or by external XML metadata ( <class ...



FetchGroup represents a named fetch group for a specific class or interface.(Interface of JDO)


Storing objects problem

I want to save this object to database: @Entity public class Device { private String name; private String type; private String ipAddress; private Device parent; @Id private String ID; private String ID_HZMO; @ElementCollection private List<Device> children; }    ... it explicitly. For example, by adding an annotation to a reference: @ OneToMany ( cascade = ...



... New error message when persisting a reference to a new (non managed) entity object. Fixed a bug in ...


Page #9 entry 0 (key 'bjjl') has 75 extra bytes / Unexpected last index ID: -119 (expected -116)

Please check the attached database file. When running the Doctor, I get   Global Value Errors ------------------- [1] Unexpected last index ID: -119 (expected -116) Page Content Errors ------------------- [1] Page #9 entry 0 has unexpected object format [2] Page #9 entry 0 (key 'bjjl') has 75 extra bytes   Both errors are not fixable. When creating a new db file with the Doctor, this file yields the same errors. Please advise.  Bug Version: 2.4.0 Priority: Normal Status: Fixed Replies: 6 Type:  Bug ...


Failed to generate dynamic type

Hi  I was trying to enhance some of my classes and I got an error :  Failed to generate dynamic type com.package.RootContainer (error 361) It seems that all dependent classes are on the classpath , so what is missing or how to recognize what is wrong with that class ?? thanks in advance b ... by the JVM, for example because of a missing type, and reference to the relevant field is unavailable). The static initializer ...



Release date: 2011-04-10 Download (5.07 MB) Binary:  objectdb-2.2.1.zip You should start by following a  tutorial or reading the manual ...