About retrieve

forum_thread

system exception occurred during an invocation on EJB GuestDao

Hi, I am new to ObjectDB I was trying your eclipse/jee6/glassfish tutorial. Eclipse Luna, Glassfish 4. I am getting the following exception (see below) just after deploying the project. Can someone help me ?  Thanks ... by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null at ... by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null at ... Caused by: java.lang.IllegalStateException: Unable to retrieve EntityManagerFactory for unitName null You may have missed one ...

 
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.... statement. Works! testUpdate Retrieve statement from database, retrieve some element from database, create a new component, save new ...

 
api-jpa

setMaxResults(maxResult)

Set the maximum number of results to retrieve.(Method of javax.persistence.Query)

 
api-jdo

javax.jdo.annotations.FetchPlan

Annotation for the fetch plan of a persistence manager, query, or extent.(Annotation of JDO)

 
forum_thread

objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check") vs. generic classes with interfaces: detailed investigation

objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check" system property) The following is a detailed report on investigation of multiple issues that have been mentioned in the following forum postings and issue reports (but please do not visit them from here now, the diagnostics there are now obsolete): - Issue #282 - ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection #1 2016-08-21 09:00 objectdb-2.6.9_02  (with "objectdb.temp.no-enhancement-crc-check" system property) The follow ...

 
release

2.4.3

Release date: 2012-08-26 Download (5.4 MB) Binary:  objectdb-2.4.3.zip You should start by following a  tutorial or reading the manual ...

 
forum_thread

Slow searching with two indexes

I'm running queries on a large database (tens of millions of objects), and I'm running into a performance problem using two indexes.  An entity I'm querying has two indexed fields - one is the primary key (id) and so is different for each object, and the other is an object reference that only has a few tens of different values.   When I query by just the primary key, it's (of course) extremely fast, but when I also query using the other key, queries can take minutes.... ) .   [ Step 2 ] Retrieve fields in NmeaBatch ( this ) instances.   [ ... The second query is slow because of the need to retrieve timeReceived value for a lot of objects. Unfortunately the fact ...

 
release

2.4.1

Release date: 2012-06-16 Download (5.4 MB) Binary:  objectdb-2.4.1.zip You should start by following a  tutorial or reading the manual ...

 
release

2.4.2

Release date: 2012-07-22 Download (5.4 MB) Binary:  objectdb-2.4.2.zip You should start by following a  tutorial or reading the manual ...

 
release

2.3.5

Release date: 2011-12-21 Download (5.38 MB) Binary:  objectdb-2.3.5.zip You should start by following a  tutorial or reading the manual ...