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tutorial

Spring MVC and JPA Tutorial

Step by step tutorial that demonstrates how to build a Spring MVC Java web application (with Servlet, JSP and a DAO Bean) using JPA. This tutorial demonstrates how to create and run a full Java Spring MVC (Model View Controller) web application using Tomcat (or GlassFish), JPA, ObjectDB and Maven. The demo web application manages a basic guestbook page. Every visitor can s ...

 
issue

ArrayIndexOutOfBoundException

Hello, we got this exception when using ObjectDB: ... 16:27:57 #39 store] Database 'C:\SafeQORS\server\cache\MainORSCache.odb' is closed ...

 
forum_thread

JPA 2.1 and AttributeConverter

Hello :-). Are there any plans to support JPA 2.1? I would wish to have a support for @AttributeConverter. #1 2012-07-09 06:38 Hello :-). Are there any plans to support JPA 2.1? I would wish to have a support for @AttributeConverter ...

 
forum_thread

JPA and handling large data sets

This is not a rellay ObjectDB problem, rather a JPA problem. Our web-based DB supports Hibernate or JPA (ElicpseLink/ObjectDB). We implemented a export/import class to export the whole database or single datasets (domains) in a persistence layer/database independent format. This class works fine - DB exports form a Hibernate/MySQL base via the independent formt to ObjectDB is possible. But exporting large binary data sets is very slow. To avoid memory problems the binary data type is read step by step during the export with the  query/setFirstResult() & setMaxResults(). #1 2014-08-06 16:06 This is not a rellay ObjectDB problem, rather a JPA problem. Our web-based DB supports Hibernate or JPA (ElicpseL ...

 
forum_thread

SectionClassifier message in log

I'm trying to track down an issue in an application - the problem occurs around the retrieval of an object from a database the specifics are unclear at the moment. In the objectdb log the following message is written everytime the issue occurs. Could you give more detail about what this message means? [2011-11-24 20:43:10 #114098 store] SectionClassifier: SectionClassifier{'4548f06f-405e-4f3e-9b7b-8e27bf4bd91c'->merger[3477129]-missing:1713} ... this message means? [2011-11-24 20:43:10 #114098 store] SectionClassifier: ...

 
tutorial

NetBeans/JPA Spring MVC Web Tutorial

Step by step tutorial that demonstrates how to build a Spring MVC Java web application (with Servlet, JSP and a DAO Bean) in NetBeans using JPA. This is the NetBeans version of the Spring MVC and JPA tutorial. It demonstrates how to create and run a full Java Spring MVC (Model View Controller) web application in NetBeans - using JPA, ObjectDB, Tomcat (or GlassFish) and Maven. The demo w ...

 
api-jdo

Persistent.types

Types of the member.(Annotation Element of javax.jdo.annotations.Persistent)

 
forum_thread

multiple LEFT JOINs do not work as expected

Hi, We have a hierarchical data set of organisations in the database, where each organisation stores a reference to it parent organisation. I'm trying to find all organisations 2 levels under a root organisation, e.g. where organisation.parentOrg is the root or organisation.parentOrg.parentOrg is the root. The query also contains a number of other predicates and it is built dynamically using Criteria API. It could be looking for other number of levels, 2 is just an example. The test query looks like this: #1 2011-12-16 05:41 Hi, We have a hierarchical data set of organisations in the database, where each organisation stores a re ...

 
api-jdo

isTransactional(pc)

Tests whether this object is transactional.(Method of javax.jdo.spi.StateManager)

 
api-jdo

deletePersistentAll(pcs)

Delete an array of instances from the data store.(Method of javax.jdo.PersistenceManager)