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41

Memory Leak in EntityManagerFactory ?

understand. 1. the server is running in embedded mode 2. the static EntityManagerFactory (m_manager_factory in the example) is opened via m_manager_facory = Persistence ... and removed from memory (checked in the Profiler) 4. nevertheless there are lots of identical Copies
40

Object DB vs EclipseLink/TopLink: Unloaded relationships in detached entities

ObjectDB support, while the entities in a result set list from a JPQ query are initially managed ... of the container, and then in ObjectDB (but not in EclipseLink) lazy loading fails. The 3 possible solutions in the ObjectDB case seem to be: 1. Use explicit FetchType.EAGER on all desired collections
40

in-memory and on-disk support?

looking at replacing a setup of H2 where I have 40GB in-memory backed by 800GB on-disk, the 40GB in ... , the records at the end continuously purge as the new ones come in(duplicate write, one to in-memory and one to on-disk). Does ObjectDB offer a similar in-memory/on-disk option? I noticed the embedded and TCP
40

Corrupted Database or error in ObjectDBExplorer?

). Can you analyze the problem and tell us if its a problem of the explorer or a real problem in ... (its the 9th entity) If we execute queries in the explorer we observed the following: "select x from ... " -> the expected Ids, but null for the class any ideas? btc_es BTC EmbeddedSystems The data in this database
40

What role is the JDO in ObjectDB?

Mike Keith believe the JDO is out of date. Then what role of JDO in ObjectDB? Will our codes with JDO be out of date? Due in part to some of the failures of the EJB persistence model, and some ... and consuming them. JDO also had a query language that was decidedly object-oriented in nature, which did
40

Configuration and Activation Code in ObjectDB 2.x

the odbee.jar file and got the activation code.It is mentioned in the side that i need to use the activation code using <activation> tag in the objectdb.conf file. In 1.x objectDB, we are not using ... Bhaskar Information about the ObjectDB 2.x configuration file is provided in chapter 6
40

Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

are sequential and therefore they are stored in sequence pages in the database. New objects with UID primary keys may have to be stored distributed in the entire database file, so a similar transaction may require searching positions in the database and processing much more database pages
8

Schema-Update: Deactivation of automatic entity class removing and introduction of a new class remove in the schema config

Hello, in our application we use ObjectDB in embedded mode as part of the Profile ... design. The product can be installed in different configurations (in other words with more or ... of entites which are not found in the class path. With this background it would be very helpful
8

Tracking changes to new collections (in enhancement mode) after flush

Hello, We have an issue with a list as a value in a hashmap. Within one transaction a new key-value ... operations being performed in between. Once the transaction is committed, the issue is that the last element in the list is not persisted and cannot be retrieved in another transaction. The last element
8

boolean field flips after schema update (in class) of another field

on several instances the values of other boolean fields in the same class (next to the new one) flip or change ... anything) and values in the database changed. We did not have this in our testing and stating environment, but now in field. Object DB version was upgraded maybe two times in the last months in the field

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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