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system exception occurred during an invocation on EJB GuestDao

() 2014-09-01T19:09:01.324+0200|Avertissement: javax.ejb.EJBException at com.sun.ejb.containers ... .ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:698) at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager

Deleting JPA Entity Objects

objects that are contained in the entity object are also deleted. If the transaction is rolled ... entity class contains an address field that references an instance of Address, which is another entity

General Settings and Logging

The <general> configuration element specifies ObjectDB settings that are relevant to both the server side and the client side. The default configuration file contains the following <general> element ... data, such as query results that contain millions of objects. The <temp> element specifies temporary

JPA Persistable Types

. It can contain constructors, methods, fields and nested types with any access modifiers (public, protected ... class can only be stored in the database as embedded objects, i.e. as part of a containing entity

objectdb-2.6.9_06: Extended Persistence Context fails: 'Attempt to begin a new transaction when a transaction is active'

.containers.BaseContainer.preInvoke(BaseContainer.java:2004) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:210) at com.sun.ejb.containers ... .ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:723

JPA Tutorials

, so you should be able to run it on any servlet container (e.g. Apache Tomcat, Jetty, etc.), as well as ... that should be deployed in a Java EE 6 container: Java EE 6 (J2EE) Web Tutorial Since this web

Step 3: Define an EJB Session Bean

containers, such as Tomcat and Jetty. By using EJB classes we can move some work from the application to the EJB container (i.e. to the application server). For instance, in this application the server

Step 1: Create a Maven Web Project

to create the project. The configuration of the new created project is contained in a pom.xml file

[ODB1] Chapter 3 - Persistent Classes

a collection that contains objects of non persistent types, at storage time. As an extension to JDO ... , but usually the term 'persistence aware' refers to classes that are not persistent but contain

ObjectDB 1.0 Manual

basic database programming using ObjectDB. Subsequent chapters contain detailed instructions

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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