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object creation during pmf.getPersistenceManager()

Hi We have observed that during pmf.getPersistenceManager(), objectdb is creating object instances ... that transaction we will create instances for all classes. The number of objects created during this invocation is really huge, that causes OutOfMemory during commit (memory for jvm 1,4GB). The object

removed objects stay with null field values in the reference

We have a class with a one to many relationship declared like this (1 or more objects of the same ... <ObjectNode>(); When we remove an object that is in this relationship (workflow), the object stays in ... is when we delete with a query use entityManager.remove hgzwicker Hans-Georg Zwicker You have to remove the object

how to operate with same object but two different Thread on database.

Hi, i have two thread one is for insert data another is for update data but in same object and same ... object of Gettersettetclass, i.e insert operation and pass that object to update.java class. Update ... that object here which is passes from insert.java class.Then here i want to do update operation

"Attempt to lock a non entity object" error

Probably a simple answer for someone who's been using ObjectDB for awhile: I'm reading objects from ... object" session.rollback() is somehow causing the problem (found through debugging ... ------------------------------------------------------------- Attempt to lock a non entity object

Criteria Query results in a NoResultException instead of returning object

.authenticate(IdentityImpl.java:284) ... 45 more Even though there exists an object that matches the query (check attached screen shot). Should the query be returning an object or am I doing something wrong ... of the criteria query returns an object: String queryStr = "select i from

Storing Images and Object Pooling

it will be good if you make object pooling for every class.We dont know about your codes but i think it will be very good if you make object pool. kadirbasol Kadir BASOL You should be able to use ObjectDB successfully as an image database. ObjectDB includes many types of cache mechanisms, including object

Listing large number of complicated objects with paging.

to build wrapper object ProductTO that contains only fields that I need in listing and the use new ... runs blazing fast (22ms) but I think it's because Explorer lazy loads all that objects and load ... query manager fetchSize is like all objects in database: <newQueryResponse isUnique="false

Explorer bug ? Objects seem to be missing from database in Class view, but are present as references

. When the project runs it logs creation of objects. Please note that there are 2 Project objects, and note that every Element object (except Project itself) gets a Project reference on construction: INFO ... ) We see that 2 Project objects were created, however in the database Explorer it lists size=0 for Project class

spuriously objectdb objects have null references

from time to time we have in a multi threaded environment objects where all the references are null ... methods and protected them with synchronized like: ... private static Object lockBegin = new Object(); public static void begin(EntityManager threadEntityManager){ synchronized(lockBegin

Navigation through lazy loading from Detached Objects

A main limitation of detached objects (as explained on the Detached Entities manual page) is: Retrieval by navigation from detached objects is not supported, so only persistent fields that have been loaded before detachment should be used. As explained on the Object DB vs EclipseLink/TopLink

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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