About object

release

2.5.1

... Changed merge implementation (removed temporary object clearing). Fixed the Explorer to show null values in ... (including on mapped by collections). Fixed object duplication on cascading merge ( issue #110 ). Fixed an ...

 
api-jpa

javax.persistence.Query

Interface used to control query execution.(Interface of JPA)

 
page

About ObjectDB Database

ObjectDB is a powerful object oriented database management system (ODBMS). It is compact, reliable, easy to use and extremely fast. ObjectDB Object Database ObjectDB is a powerful object-oriented database management system (ODBMS). It is compact, ... Database Key Features 100% pure Java Object-Oriented Database Management System (ODBMS). No ...

 
forum_thread

Object explorer cannot open odb file. ObjectDB many-to-many relationship

I created a data model to test many-to-many relationship with a link table as following (full code in attachement) ... (not by theirs key), and we can easily get an Assignement object from User object and Underlying object (but not through theirs keys). I'd ...

 
forum_thread

internal object DB locking in an embedded multi threaded application

Hi, we are using Embeded objectDB 2.4.4_06 in a highly multithreaded concurrent manner and we have noticed a performance problem in our application that seems to be attributed to ObjectDb's internal locking. When profiling our app in JVisualVm we notice a large number of threads are blocked and when doing a threaddump we notice that they are all blocked in the same place: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
forum_thread

ObjectDB's Database Doctor Incorrect Error Report

Am I reading this correctly?  It seems that Doctor is telling me that one of my objects is missing.  Looking at the database with ObjectDB's Database Explorer though seems to show that the reference to the object is good and that the object does indeed exist.   Output from Doctor Diagnose and Doctor Repair is attached.  So are the two databases and screenshots of Explorer showing the reference to the object and the existence of the object. ... Explorer though seems to show that the reference to the object is good and that the object does indeed exist.   Output from Doctor Diagnose ...

 
forum_thread

Insertion Speed Rate and Batch Load

1. I got about 10K inserts / second, is it normal? I would expect more than that, like close to 100K/second. I can definitely do 80K inserts/seconds on Oracle with batch insert on table with one primary key. 2. Is batch update/insert operation supported? I attached the files. ... moreover, a new EntityManager  per stored entity object. A batch load should reuse the EntityManager and persist a large ... instances per second. But Device is a large object with an array of 100 strings (by the way, List<String> is ...

 
forum_thread

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: ... ObjectDB Support ObjectDB - Fast Object Database for Java (JPA/JDO) ...

 
api-jpa

lock(entity, lockMode, properties)

Lock an entity instance that is contained in the persistence context with the specified lock mode type and with specified properties.(Method of javax.persistence.EntityManager)

 
forum_thread

Error using query with MAX() function

I have a class that is persisting a Entity that holds remarks and a time. Then when I query for the latest remark I get a internal error when the remark is larger than 1966 chars. Here is a test class and entity that reproduces the problem on my system. ... ( ) ; CriteriaQuery<Object> q = cb. createQuery ( ) ; Root ... cb. max ( c ) ; CriteriaQuery<Object> s = q. select ( me ) ;   ...