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New Tutorial: Using BIRT with ObjectDB/JPA

Version 2.2.7 of ObjectDB added support of report generation using the popular open source Business Intelligence and Reporting Tools (BIRT). The new Report Generation with BIRT and JPA tutorial provides step by step instructions on how to use BIRT to produce reports based on data in an ObjectDB database.    
Issue
2

Persist & remove in same transaction

the number of simple entity objects in the database Retrieve the simple entity object using find by id ... the number of simple entity objects in the database Commit the transaction The count operations in step 3 & 6 both return 1 but I would've expected step 6 to return 0. Could you let me know if this is a bug
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2

Report Generation with BIRT and JPA

hi In Report Generation with BIRT and JPA tutorial. step:1 completed but in step:2  "business Intelligence and Reporting tools"   is not  available. attach in image1.jpg Thank you Bimal kumar Dalei ... that BIRT was installed by Help > About Eclipse > Installation Details. hi After Installation Details
Manual
2

Comparison in JPQL and Criteria API

operators. JPQL follows the SQL notation, where Java uses its own notation (which is also in use by JDOQL ... , there is also a difference in the way that NULL values are handled by these operators. Comparing NULL values The following table shows how NULL values are handled by each comparison operator. One column presents
Manual
2

Database Connection using JPA

A connection to a database is represented by an EntityManager instance, which also provides ... . An EntityManagerFactory is constructed for a specific database, and by managing resources efficiently (e.g ... the content of a database require active transactions. Transactions are managed by an EntityTransaction
Manual
2

Index Definition

Querying without indexes requires iteration over entity objects in the database one by ... index is an index on more than one persistent field. It is defined by specifying multiple fields in ... ; : } Notice that the paths include a collection, so multiple values will be maintained by the index
Manual
2

Working with JPA Entity Objects

are provided in the Storing Entities section. Entity objects retrieved from the database by ... is detected by the owning EntityManager and the update is propagated to the database on transaction ... . A managed entity object can also be retrieved from the database and marked for deletion, by using
Issue
2

Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)

showing the query result in indexTest.xhtml. The problems is illustrated by running the attached JavaEE ... either empty or populated are served as null (!). The query is performed by an @EJB: @Stateless public class ... working on my problem, as I am greatly encouraged by experiments last night that lead
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2

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

setup: - The diagnostics here have been recorded carefully at every step, including Git tracking ... .java:274) Caused by: javax.persistence.PersistenceException: com.objectdb.o.UserException: Failed ... .objectdb.o.JPE.g(JPE.java:145) at com.objectdb.o.JPE.g(JPE.java:78) ... 6 more Caused by: com
Issue
2

Server out of memory exceptions

] Database 'F:\calculationservice\objectdb\db-files\WorkflowHistory.odb' is closed by 14140@SE101924 [2011-07-30 19:54:36 #23 server] [ObjectDB 2.2.8] Unexpected exception (Error 990) Generated by ... exception (Error 990) Generated by Java HotSpot(TM) 64-Bit Server VM 1.5.0_21 (on Windows 2003 5