About @Query

issue

Pessimistic lock timeout - blocks indefinitely

I've attached a simple test which creates an object then kicks off several threads which each try to update the object. I'm using a pessimistic lock with timeout as follows: Bug Version: 2.3.1 Priority: Normal Status: Fixed Replies: 3 Type:  Bug ...

 
forum_thread

Sample JDO Architecture for Follow Up Questions

I am trying to finalize on my application's JDO and ObjectDB archieture.  I have done documentation survey (reading JDO books, studying ObjectDB's documents and forum) and have designed what I think is the best architecture for my particular application usage model. #1 2016-07-25 15:26 I am trying to finalize on my application's JDO and ObjectDB archieture.  I have done documentation surv ...

 
forum_thread

Is it possible to commit only specific elements?

Hello, As stated above, I would like to know if it is possible to commit only specific elements, or at least update a single table, disregarding the other entities loaded in the persistency context? I have a complex hierarchy of intertwined objects. Currently I am clearing my persistency context, retrieving only the needed ones, creating new ones (which I want to commit), detaching the ones I've previously retrieved and finally committing. My context is big data and performance is an issue.      #1 2015-07-24 11:13 Hello, As stated above, I would like to know if it is possible to commit only specific elements, or at le ...

 
forum_thread

Connection is closed (error 526)

Serval times I found the c/s method will close by unknown reason, when I read only the db. #1 2011-07-01 11:32 Serval times I found the c/s method will close by unknown reason, when I read only the db. Exception in th ...

 
forum_thread

SelfTest and com.objectdb.Doctor

Dear Objectdb-Team We're really pleased with objectdb. Nevertheless we would like to ask for an 'extra' feature. The class 'com.objectdb.Doctor' enables a self-test for a given Database. We would like to make a self-test before every start of the database (i.e. the server). In case of fails or errors we would like to repair the database and/or inform the customer. #1 2015-10-29 10:27 Dear Objectdb-Team We're really pleased with objectdb. Nevertheless we would like to ask for an ' ...

 
forum_thread

Create simple index for a Id field

Hello, I just wanted to write another anotation to my key field so I can have a really simple index. This is the original code: @Entity public class ObjectDbEntity<Key,Value> implements DataItemProvider<Value> {         @Id     private Key key = null;     private Value value = null; and I just want my key to be indexed on my db, just like this: #1 2014-10-09 00:06 Hello, I just wanted to write another anotation to my key field so I can have a really simple index. This is the ...

 
forum_thread

ObjectDB shuts down

Hi, we have a problem with OBjectDB shuts down every few days, sometimes every day. It always happens in the morning ie. after several hours of inactivity although we are not sure if this is the reason. Last night we maintained constant activity during the whole night (user were frequently using the application) and DB was OK. #1 2014-02-17 13:34 Hi, we have a problem with OBjectDB shuts down every few days, sometimes every day. It always happens in the morn ...

 
forum_thread

Spring MVC Errors

I try to import the project from the tutorial but when doing so I get errors: 1. http://i.imgur.com/tbIsj.png and then when I try to start it anyways I get things like thaat: 2. http://i.imgur.com/G7UVu.png any ideas ? I installed m2eclipse plugin and Maven Integration for WTP and then I import Maven project from disk and this is what I get ... ;( #1 2012-08-04 16:54 I try to import the project from the tutorial but when doing so I get errors: 1. http://i.imgur.com/tbI ...

 
forum_thread

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: #1 2012-01-30 07:39 Hi there, Our app is highly scalable and can be distributed among multiple processes on multiple machines ...

 
api-jpa

javax.persistence.criteria.Path

Represents a simple or compound attribute path from a bound type or collection, and is a "primitive" expression.(Interface of JPA)