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[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... of the candidate class satisfying the given filter. In addition to these three main components, queries can include other optional ...

 
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Concerning coding style of the example in the posting instructions

(This forum item was spawned from discussions in a private helpdesk ticket.) I write with reference to the coding example in the posting instructions and many of your other examples posted in the forums. While I appreciate the recommended coding style as shown makes for convenient minimal examples and test cases,  I contest that it breaks the rules for JPA2 entities on at least 2 counts. Firstly, the posting instructions state:  #1 2012-03-14 00:28 (This forum item was spawned from discussions in a private helpdesk ticket.) I write with reference t ...

 
issue

ObjectDB 2 JDO Manual

The new ObjectDB Manual describes how to use ObjectDB 2 with JPA. An additional manual that focuses on using ObjectDB 2 with JDO can help JDO users. But since writing a new manual and then maintaining two similar manuals, one for JPA and the other for JDO requires sufficient effort, this will be done only if there is sufficient demand.   Documentation Version: 1.04 Priority: Normal Status: Active Replies: 8 Type:  Documentation ...

 
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can't get HashMap out of the database

I'm trying to persist an Entity containing a HashMap. It stores the data in the database OK, but the map is always empty when I get the entity out of the database again. I've reproduced this problem in a simple variation of the Guestbook tutorial: Guest class: ===================== ... Context, as discussed in this forum thread . In addition, you have to use the last build (2.3.2_04), since due to a bug ( ...

 
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Activation error on Schema change

Hi, 1) Is @OrderBy annotation supported ? When I add this annotation to my entity I get an error, saying that I did not activate my ObjectDB (which I did) : ... a specific activation code for that machine. In addition, as reported in another forum thread , changing network may also ...

 
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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. ... 2015-03-10 09:36 In addition, the error message we get by the example: [ObjectDB 2.6.1_01] ...

 
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Unable to persist TreeMap

import java.util.SortedMap; import java.util.TreeMap; import javax.persistence.Entity; //---------------- @Entity class Person { public SortedMap<String, String> memberships = new TreeMap<String, String>(); } //Person   #1 2013-06-04 14:44 import java. util . SortedMap ; import java. util . TreeMap ; import javax. persisten ...

 
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Glassfish 3.1.2.1 and ObjectDB 2.4.3

Hello, I tried to get the Guestbook tutorial run with Glassfish (see above) but it's not working. When I try to add a guest I got a HTTP Status 404 Wich versions of ObjectDB should I use? Thanks ... tools are you using (IDE, Browser, etc.). In addition, check if there are exceptions in the console or in the server log. ...

 
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Primary key generation problem after changing entity package

Hi, I changed package name for some of my entities in database. I added info in <schema><package... /></schema> of my configuration file - and the changes have been succesfully made in database. Unfortunately, sequences have been probably lost for changed entity classes. After schema change I keep getting errors : Attempt to reuse an existing primary key value... My primary keys are annotated as shown below : ... is a bug when more complex schema changes are made. In addition, notice that any code refactoring that is not synchronized with the ...

 
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Reading 1.x odb files in ObjectDB 2.x without upgrading

Hi, We have a problem in the backward compatibilty in our software as once we have migrated object db odb file from version 1.x to 2.x, user is unable to open the odb files in the application which is having object db 1.x installed. Is there any way to read odb files from 1.x in object db 2.x without upgrading it ? Or user can see the content in read only mode without upgrading it ? Thanks #1 2012-09-03 10:49 Hi, We have a problem in the backward compatibilty in our software as once we have migrated object db odb ...