About Time

forum_thread

ObjectDB Website and Yahoo Mail

The attached image represents the error I got yesterday when I posted my previous reply with "Phew. Thanks a lot..." I thought that you might want to see it. I couldn't upload it yesterday, even though I tried 5 times. The website didn't allow. Moreover, sometimes objectdb's website loads extremely low, between 8-15 seconds for each page. Can you do something to improve it, please? It's a real pain during the day if I want to use it (forum/bugs/docs). Cheers! ... It's the first time when it happens, 100% reliable and no delay at all. Good job, ...

 
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Attempt to open a non existing file '/tmp/objectdb_xxxx/SortQueryItr_6.mrg'

Hi, I came across an error - but i have not been able to create a simple reproducible case - the error does not happen often and does not happen always -  Let me explain: 1/ I run 5 java applications at the same time on one machine - each application is using an ODB file (each one is using a different one). Basically each application does a sorted query ( qqq = em.createQuery("SELECT bk FROM OBN bk ORDER BY bk.time ASC", OBN); ) 2/ after a little while - some of the applications throws this error message: ... explain: 1/ I run 5 java applications at the same time on one machine - each application is using an ODB file (each one is using ... = em.createQuery("SELECT bk FROM OBN bk ORDER BY bk.time ASC", OBN); ) 2/ after a little while - some of the applications ...

 
manual

JPA Primary Key

Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... java.util.Date , java.sql.Date , java.sql.Time , java.sql.Timestamp. Any enum type. ... large result sets. As an example, consider a real time system that detects events from various sensors and stores the details in ...

 
release

2.2.5

... Changed log format to include date and time . Changed class loader management. Fixed ...

 
manual

[ODB1] Chapter 6 - Persistent Objects

Shows how to store, retrieve, update and delete database objects. ... to this JDO rule, every transient object that, at commit time, is reachable from a persistent object (using persistent fields) also ... Therefore, for efficiency sake, it is recommended to avoid time consuming operations in no-arg constructors of persistent classes, and to ...

 
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Source not found error after downloading ObjectDB 2.3.7_04

Code snippet: Properties prop = new Properties(); prop.setProperty("javax.jdo.PersistenceManagerFactoryClass","com.objectdb.jdo.PMF"); prop.setProperty("javax.jdo.option.ConnectionUR","local.odb"); PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(prop); PersistenceManager pm = pmf.getPersistenceManager();   I am getting an error Source attachment does not contain source for File PMF.class. ... in Eclipse it asks me to provide source code at debug time. I provided the zip file mentioned above. But them it throws an error that ... the Objectdb.jar file in build path. There were no compile time errors. I debugged following code import java. util . ...

 
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 ... 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 ...

 
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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. ... times with deleting many object at once. I didn't have time to report it, but I experienced it several times. In my case the operation ...

 
page

ObjectDB Web Site - Terms and Conditions of Use

... and may be terminated by ObjectDB Software at any time. Upon terminating your viewing of these materials or upon the termination ... changes to the materials contained on its web site at any time without notice. ObjectDB Software does not, however, make any commitment ...

 
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Embedded & Activation & Scalation

Hi there, Our app is highly scalable and can be distributed among multiple processes on multiple machines. ObjectDB Server is not really scalable right now and would be a SPOF for our application. So, we'd like to embedded odb into each instance instead for now and point each to the same database folder, however I've got a few questions I couldn't find answers for: ... at runtime and do enhance them at runtime, not compile time.. ?   Alex ... has to be performed before deployment (at compile time). This works well for existing ObjectDB OEM users. It will not work, ...