About reference

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1

Removing objects where ManyToMany relationships exist

It is application responsibility to prevent broken references. When an OtherEntity object is deleted the application must also remove any references to it, including from the setOfOtherEntities TreeSet. Broken references are not null values and they are more difficult to handle because accessing
Forum
1

Slow searching with two indexes

- one is the primary key (id) and so is different for each object, and the other is an object reference ... log, the way the query is run is that all values of the object reference key are scanned ... , like this: select from Thing where reference == :objectReference order by id desc  With the query
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Entity Management Config questions

of the two cache mechanisms for entities: The ref attribute specifies the reference type for holding non ... references in the persistence context (until commit or flush), regardless of this setting. Question: What exactly is the difference between "weak", "soft", and "strong" references? The following blog
Issue
1

ArrayIndexOutOfBoundException

, except references from CacheableJobStat instances to deleted CacheableJobLog instances. This requires fixing the application (making sure that references to deleted objects are removed to avoid broken references), but it doesn't seem to be related to the reported exception. We are currently checking
Forum
1

javax.persistence.PersistenceException: No Persistence provider for EntityManager named in Karaf 4.0.7 and OSGi DS test

a thread in the forum (form 2011 - http://www.objectdb.com/database/forum/286) that refers to the same ... file was included in the bundle that is supposed to reference it. I want to deploy objectdb.jar file ...  EntityManagerFactory as a service such that one simply needs to request a reference to the service
Forum
1

joining of tables

as a Java reference field in Employee or if it is bidirectional relationships also add a reference back from Address to Employee with a mappedBy setting. You can use either a to-one reference (Address) or to-many reference (e.g. List
). See the manual for more details. Bimal
Forum
1

Multi-Threading/Distributed-Database Questions...

to use two database files on two different physical hard disks while still being able to cross reference ... thread. References from objects in one database to objects in another database are not supported. Applications can simulate such references by holding primary keys instead of references, but in
Forum
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Occasionally slow requests in load testing

have so many        >  CPU cores, some queuing is not necessarily a bad thing. If you are referring ... and once it starts having this issue it is around 10-15%. If you are referring to something else, I'd ... to retry.  Kind regards, Natalia.   > If you are referring to the thread switching, it will not cause 10
Issue
1

Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)

explanation I will refer to the (bi-directional) ownedElements List of the Element class ... and detachment is wrong. Detachment is done automatically by the application server and lazy references are not ... this case? Good question but you will have to refer it to the EclipseLink guys. ObjectDB doesn't
Issue
1

Out of Memory - Slow leak?

. It seems that there is a problem with some heavy objects that ObjectDB manages using reference counting. Somehow in an unknown situation the reference count drops to -1 and then the objects are pinned. Unfortunately ... the problem by blocking an attempt to decrease the reference count below 0. In addition on such attempt