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forum_thread

Problem on JPA Merge Entity.

Hello, I have a problem with the EntityManager.merge() function. I set a property value of an entity (statement) with an other entity (newSingleConstraint). newSingleValue is already persisted. I do this myself (no use of cascade because sometimes the newSingleValue is already in database).   The statement update don't throw exception. And when i try to reload statement the value i have set before is a null value. I check with the Explorer, the statement has a null value on the property and the newSingleValue is present....   The little sample is based on a web page ( http://localhost:8080/ERGO_ObjectDB/) On this web page we can found 4 links. /testCreate /testUpdate ...

 
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List of Enum Values in an entity

Hello, I'm new with ObjectDB and just tried out the example in the Eclipse/Glassfish tutorial (http://www.objectdb.com/tutorial/jpa/eclipse/ee). After testing was successful, I extended the Guest class with an ArrayList of Enums: private ArrayList<GuestFlag> flags; The flags are stored into the database without any problem. In the explorer I can see that it is stored as array of Strings. ... application server do you use? Can you upload the entire web application? The following test tries to reproduce the problem in a ... We could reproduce the issue in the GuestBook web application. The problem is that by default, collections are loaded ...

 
manual

Online Backup

Online Backup enables backing up an ObjectDB database while it is in active use by applications. The ability to create a backup while the system is running is essential in applications and services that have to be available 24/7/365.... provide round the clock service (24/7/365) such as most web applications. This page covers the following topics: ...

 
manual

Database Connection using JPA

Describes the main JPA interfaces: EntityManagerFactory, EntityManager and EntityTransaction.... connections during their lifetime. For instance, in a web application it is common to establish a separate database connection, using ...

 
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Getting com.objectdb.o.UserException:

I am using the object db version 2.x in a web application that runs on tomcat4. I am using the default configuration file. ... I am using the object db version 2.x in a web application that runs on tomcat4. I am using the default configuration ... Files (x86)\Apache Group\Tomcat 4.0\webapps\Expresso\WEB-INF\log\odb20120904.log' at com.objectdb.o.MSG.d(MSG.java:74) at ...

 
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using objectdb.jar in writing data to mariadb or mysql db

Hello All, ... to be java (for desktop version) and python or php for the web version but i want to code queries in native java and reduce the use of ...

 
manual

JPA / JDO Class Enhancer

The Enhancer is a post compilation tool that improves performance by modifying the byte code of compiled classes after compilation.... the build process. To use load time enhancement in web applications the web server or application server has to be run with the Java agent JVM ...

 
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Master database switching to read-only mode, possibly caused by slave failure

We had a database failure causing a production outage. Both master and slave databases have failed, slave became unresponsive and the master switched to read-only mode. By the look of it the slave database failed first and possibly caused the master to switch to read-only mode. The sequence of events was: ... failure but a failure to access the master from the client web application (e.g. due to a networking issue). ... > a failure to access the master from the client web application (e.g. due to a networking issue). Any networking issue ...

 
forum_thread

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 ... Virtual server [ server ] loaded default web module [ ] INFO : Hibernate Validator 4.2.0. Final ... WEB0172: Virtual server [server] loaded default web module [] INFO: HV000001: Hibernate Validator 4.3.0.Final INFO: ...

 
issue

ObjectDB can't be activated

Hello, we are trying to activate objectdb on a virutalized debian 7 server, but do not have any success. Steps we made to activate the server: ... of the database. Would it help if we set up a web-session with access to the server? ... Hopefully we can solve it with no web session. Please try build 2.5.5_08.   ...