About attribute

forum_thread

Problem witch CriteriaBuilder isMember(..)

Dear Objectdb-Team I have some Problems running a criteria query against a set. But maybe I misunderstood some essentials I have defined an entity class and an embeddable class like this ... (of the criteria builder.in method), you can set the attribute 'programs' to zero. If you do so, query against all lists ...

 
release

2.6.7

Release date: 2016-03-04 Download (5.54 MB) Binary:  objectdb-2.6.7.zip Version 2.6.7 Added an option to write javaagent enhanced c ...

 
forum_thread

On ensuring ID available after persist

This reports on a possible solution to a common problem: I was trialling ObjectDB on an existing, functioning, large JavaEE/JPA web application, which until now had used EclipseLink+MySQL and then Oracle+MySQL. On trying it out on ObjectDB I hit a problem with my very extensive entity wiring code, which relies on an "external" entity object having a non-null id after it has been passed to EntityManager.persist, thus: ... in advance in one round trip (see the allocationSize attribute) is expected to be more efficient than a flush after every ...

 
forum_thread

Occasionally slow requests in load testing

We are running load testing against objectdb version 2.3.7_18. The performance is generally OK, however there are quite a few "spikes" in the performance where we are getting a lot of very slow response times from the DB, around 10 - 15 seconds. Looking at the DB server process with AppDynamics we can see that most of the requests get stuck in one of 2 places: com.objectdb.o.PGC:w: line number 232 com.objectdb.o.LFL:U: line number 1068 Please see the attached callgraph examples for full stack trace examples. ... are currently available. Changing the   resize attribute will affect existing databases, with no expected ill effects and no ...

 
release

2.6.6

Release date: 2016-01-27 Download (5.53 MB) Binary:  objectdb-2.6.6.zip Version 2.6.6 Added support of automatic activation of ...

 
release

2.6.5

Release date: 2015-12-22 Download (5.52 MB) Binary:  objectdb-2.6.5.zip You should start by following a  tutorial or reading the ...

 
forum_thread

Error: Failed to write value of field X using reflection (oneToMany relation)

Hi there! I have been all day trying to solve this. I have read multiple sites and documentation, but I can go through this. I have a clase named Pedido, that have a reference ManyToOne to a clase Cliente. ... You have to change the value of the mappedBy attribute: @ OneToMany ( mappedBy = ...

 
issue

InternalException during producer/consumer scenario

Hi, I'm trying to use objectdb in a producer/consumer scenario. Producer threads put message objects into a table while consumer threads remove the objects based on age, priority, etc. There are 2 main motivations for using objectdb for this purpose rather than a queue or similar data structure: 1) The consumer can select the "next" object based on a range of potentially complex criteria. 2) The number of objects produced can be potentially exceed available memory so can be held on disk within the objectdb file. ... Could you please try setting the  max-threads attribute in your configuration to 0 ? 1000 ? If this doesn't ...

 
forum_thread

Missing Data on Retrieval (0, null values)

I try  to export all Objects in an Flatfile-Hiearchy (.csv). But only the first exported Table contains all necessary Data. Most of the others  contains all  Object-Rows', but most Values of the Columns are missing. With a  em.clear() inside the Loop, all tables are exported correctly but the Enity-Keys do not match. I can't get the point - what am i doing wrong?   emf = Persistence.createEntityManagerFactory(dbFile); em = emf.createEntityManager(); #1 2016-04-13 07:07 I try  to export all Objects in an Flatfile-Hiearchy (.csv). But only the first exported Table contains ...

 
release

2.6.4

Release date: 2015-10-13 Download (5.52 MB) Binary:  objectdb-2.6.4.zip You should start by following a  tutorial or reading the ...