About managed

tutorial

Step 2: Entity Class and Persistence Unit

Explains how to define a JPA entity class and a persistence unit (persistence.xml) in a NetBeans Spring MVC web application project. To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node (in the [Projects] window) and selecting  New > Entity Class ... (or  New ...

 
release

2.0.0

... error message when persisting a reference to a new (non managed) entity object. Fixed a bug in lazy loading of instances ...

 
forum_thread

Bidirectional OneToMany is slow on updated items

Hello, I have a problem with the following situation. I insert persons with addresses. In the first run, they are all new with a new address. It runs fast. In the second run, the persons are all loaded and got a second address. This seams to be much slower. The Entities are all enhanced by the javaagent (which you can see in the contained eclipse launch configuration) Is there any way to speed it up?       #1 2013-02-22 10:02 Hello, I have a problem with the following situation. I insert persons with addresses. In the fir ...

 
forum_thread

Out of memory

Hi, Today in the middle of the night ODB just crashed leaving this on console screen: #1 2012-09-18 07:06 Hi, Today in the middle of the night ODB just crashed leaving this on console screen: ObjectDB Serv ...

 
forum_thread

Activation Issue

Hi! We now reached the 10 class limit of ObjectDB. Our license is activated and if I run objectdb activation I get true back. When I start our webapp although I get the following error: ... is required only where the database file (odb file) is managed, which is usually only the server machine in client-server mode. ...

 
tutorial

Step 2: Entity Class and Persistence Unit

Explains how to define a JPA entity class and a persistence unit (persistence.xml) in a NetBeans Java EE 6 web application. To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node (in the [Projects] window) and selecting New > Entity Clas ...

 
issue

New entity objects are duplicated on merge cascading

When merge is cascaded to a new entity object that has not been persisted yet - it becomes persisted twice. This was demonstrated by a Java EE application in this forum thread but may be reproduced also in a simple console test case: ... can also cause an "Attempt to persist a reference to a non managed ..." exception, when the duplicated object is referenced from another ...

 
release

2.2.5

Release date: 2011-05-20 Download (5.1 MB) Binary:  objectdb-2.2.5.zip You should start by following a  tutorial or reading the manual ...

 
forum_thread

multi thread application, id field sporadically null

We are testing objectDB with a multi thread application. Each thread has it's own entityManager created from a common factory. In one thread we receive sometimes an object from the database with the field that is declared as @Id having the value null (what is not correct, we checked that with the explorer). The class is declared like this: ... ... 2014-04-10 20:15 we managed to overcome the problem by using flush(), clear() and refresh()  ...

 
forum_thread

How to Use a SF with extended Persistence Context?

Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. The need for an extended persistence Context emerges for the need to create queries in advance for fast execution so I need to store the queries and I need an EntityManager that doesn't get closed between calls. When I call the SF directly no problem happens but if I use SL to hold a reference to the SF I get com.objectdb.o._PersistenceException: Attempt to begin a new transaction when a transaction is active. #1 2013-11-24 06:05 Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. T ...