About generated

forum_thread

Future JDO versions?

We are about to release our first product using ObjectDB (as a small embedded store), and soon hope to release a much larger product using ObjectDB (will need an OEM license).  What really interests us is JDO.  We have been using JDO for over a decade and have found it consistently a far better API than JPA, as all kinds of features that are optional or require special extensions in JPA products, (such as large query optimisation, storage of collections of non-entities and automated management of identity) are built-in to JDO.... version of ObjectDB. Same is regarding automatically generated UUID. Other features seem to be less important, but please update the ...

 
tutorial

Step 4: Add a Servlet Class

Explains how to define an EJB session bean in a NetBeans Java EE 6 web application. In this step we will add a servlet to manage guestbook web requests: Open the [New Servlet] dialog box by right clicking the guest package node (in the [Projects] window) and selecting New > Servlet ... En ...

 
forum_thread

Performance and memory usage of queries

Hello, we can't understand why the performance of queries is not the best and the execution requires so much memory. In the implementation of our UnitTests we have used "DELETE FROM Object" to delete the database. That did not work because we often get an "out of memory" exception. What's all done in the execution of queries? Why is so much memory is required, although from the application point of view, no object is loaded. ... 2.6.1_01] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.7.0_71 (on Windows 7 ...

 
issue

Threaded Test - Failed to commit transaction: Unexpected internal exception

Hi I'm trying to create a simple producer-consumer queue scenario but am getting the followin exception: ... UUID - I understand this will be slower than using a generated id or a long, etc, but I'm constrained by an existing system. If ...

 
api-jpa

javax.persistence.CollectionTable

Specifies the table that is used for the mapping of collections of basic or embeddable types.(Annotation of JPA)

 
issue

Activation & Object Model Enhancement

We'd like to buy and use OEM Licenses. However, our object model gets enhanced at runtime (using JEnhancer directly) and not at compile time so we can not "sign" our object model at compile time though we are unable (and don't want) to activate each oem instance so we'd need a solution for this.     thanks Alex Feature Request Version: Priority: Normal Status: Closed Replies: 3 Type:  Feature Request ...

 
forum_thread

Replaying recorded requests...

Hi, I get the following when ODB starts in embedded mode: Replaying recorded requests... then I get something like 500 lines of recordset information. Here is the relevant part of the config file: Questions: 1) Why am I seeing this if I've set recording enabled to false? 2) I... Maybe you have old recording files that have been generated before you disabled it? Another possibility is that your ...

 
issue

Indexes broken after schema update

I don't want to keep creating these issues but the Exception tells me to :), I started a thread to see if anyone else has encountered this at http://www.objectdb.com/database/forum/484 ... 2.4.2_02] Unexpected exception (Error 990) Generated by Java HotSpot(TM) Client VM 1.6.0_25 (on Linux 2.6.32.12). Please ...

 
issue

ArrayIndexOutOfBoundsException on flush

The following exception was thrown when my app attempted to flush an objectdb database: ... [ObjectDB 2.3.3] Unexpected exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.6.0_26 (on Windows 2003 ...

 
tutorial

Step 4: Add a Servlet Class

Explains how to define an EJB session bean in an Eclipse Java EE 6 web application. In this step we will add a servlet to manage guestbook web requests: Open the [Create Servlet] dialog box by right clicking the guest package node (in the [Package Explorer] window), selecting  New > Other... > Web > Servlet and clic ...