ObjectDB Database Search

field parent. In the following as the code stands I do NOT maintain the derived fields in ... ("cannot find ECompoundKeyMapItem 1"); } However it does not fail on Eclipselink. If I alter the code ... // Code without manual maintenance of derived fields in @EmbeddedId classes... import javax

In error, we deployed code to production that was compiled on a machine without a valid license key.   We have since rolled the code back, however our other production servers that access the same database files (that were touched by the unsigned code ) are still encountering

with reference to the coding example in the posting instructions and many of your other examples posted in the forums. While I appreciate the recommended coding style as shown makes for convenient minimal examples ... and examples, it is not a compliant coding style. Webel webel Dr Darren Kelly Your observation is correct

Running multi-threaded access to an embedded database using JDO, I'm getting a deadlock in objectdb code .  Thread dump attached. sjzlondon Steve Zara Thank you for this report. The thread dump ... in the code .   Is there a convenient way to introduce classes to objectdb at the start of a run

to have a thread where people could post and find Gradle-Kotlin code potentially useful to ObjectDB

. The ability to store ordinary objects in the database directly can simplify the code significantly. Less (and more simple) code to write, debug and test, as well as a much easier learning curve leads

with an EntityManager (represented by em in the following code snippets), which serves as a factory ... . createQuery ("SELECT c FROM Country c", Country.class); In the above code , the same JPQL query

transaction when a transaction is active at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer ... when a transaction is active Again, this used not to happen with much older versions of ObjectDB ... commit (if active ). if (em == null) { log_warn($i, "AFTER: Extended entity manager NOT created

Hello, we have found that the enhancer returned an non-zero exit code on errors. You can change this so that the error of the enhancers can be detected. btc_es BTC EmbeddedSystems Thank you for this report. Starting build 2.6.1_04 the Enhancer exits with non zero code on errors. Note

-file programatically (from within my code ) without any errors 4) the db doctor ends without error

the @Transient annotation). Storing an entity object in the database does not store methods or code

, JDOQL and ObjectDB extensions. Setting "JPQL" is useful to enforce portable JPA code by ObjectDB

The configuration element supports renaming packages, classes and fields in ObjectDB databases as a complementary operation to renaming or moving these elements in the IDE during source code refactoring. Only these schema changes are specified in the configuration file. As explained in chapter 2

, supporting community, forums, IDEs support, tools, books, tutorials and sample code . ObjectDB

, cb. isTrue (isInUN), cb. isTrue (isInEU)); In the above  code non Predicate boolean expressions

of the entity class (e.g. Country). That is equivalent to Country.class in Java code . Notice

- start writing more effective database code using Java classes and objects! Try an ObjectDB / JPA

Entity Classes Storing an entity object in the database does not store methods and code

databases when necessary - with exactly the same code .

Copyright (c) 2007, Eclipse Foundation, Inc. and its licensors. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice

Given an EntityManager , em , that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects The following code fragment stores 1,000 Point  objects in the database: em. getTransaction (). begin

. get ("capital"); Path captialName = capital. get ("name"); The path expressions in the above code

of the new source file with the following code : package guest; import javax.persistence.*; import javax ... = (EntityManagerFactory)e.getServletContext().getAttribute("emf"); emf.close(); } } The code above: Invokes

code : package guest; import javax.persistence.*; import javax.servlet.*; @WebListener public class ... ().getAttribute("emf"); emf.close(); } } The code above: Invokes the Enhancer to enhance the entity class

and paste to replace the new source file content with the following code : package guest; import java.io

might look slightly different but the code would be the same). The tutorial is based on using a Maven

the new Spring Controller class. Now replace the content of the new source file with the following code

the new class. Copy and paste the following code into the newly created Point class: package tutorial

well (dialog boxes and menus might look slightly different but the code would be the same). This tutorial consists of the following steps:

but the code would be the same). The Tutorial Steps This tutorial consists of the following steps:

to replace the new source file content with the following code : package guest; import java.io

) class. Now replace the content of the new source file with the following code : package guest; import

replace the content of the new source file with the following code : package guest; import java.util.List

and menus might look slightly different but the code would be the same). The tutorial is based on using

and paste to replace the new source file content with the following code : package guest; import

to create the class. Copy and paste the following code to the newly created class file: package

In this step we will add code to the Main class (that was generated with the project) in order to store Point objects in the database and then retrieve them from the database. Use copy and paste to replace the content of the Main class with the following content: package tutorial; import javax

replace the content of the new source file with the following code : package guest; import javax.servlet

with other Eclipse versions as well (dialog boxes and menus might look slightly different but the code

but the code would be the same). The Tutorial Steps This tutorial consists of the following steps:

to replace the new source file content with the following code : package guest; import java.io

and paste to replace the new source file content with the following code : package guest; import java.io

This tutorial demonstrates how to create and run a simple JPA application. The demonstrated application uses JPA to store and retrieve simple  Point entity objects, where each  Point has two persistent fields -  x and  y . If you already know JPA - the source code will be straightforward

replace the content of the new source file with the following code : package guest; import java.util

well (dialog boxes and menus might look slightly different but the code would be the same). Note

of the new source file with the following code : package guest; import java.io.IOException; import javax

code : package guest; import java.io.Serializable; import java.sql.Date; import javax.persistence.Entity

with the following code : package guest; import java.util.List; import javax.ejb.Stateless; import javax.persistence

the new servlet class. Now replace the content of the new source file with the following code : package

, tutorials and sample code . When to prefer JDO JDO might be preferred when portability to other object