persistence.xml

I can not build my entity manager factory and the error I get is "chosen transaction strategy requires access to the JTA Transaction Manager". Can anyone advise what i have to configure to get past this? FYI I'm using Jboss 6, no spring. Here is my persistance.xml <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"> <persistence-unit name="AvengersPU" transaction-type="JTA"> <jta-data-source>java:/jdbc

Looks like jpa is something which makes me ask a lot of questions. Having added this <property name="toplink.ddl-generation" value="create-tables"/> my JPA application always creates tables when running, which results in exceptions in case the tables already exist. I would like JPA to check if the tables already exist and if not create them, however I could not find a value for the property above which does this. So if I just turn it off, is there a way to tell JPA manually at some point to create all the tables? Update here's the exception I get Internal Exception: com.mysql.jdbc.exceptions

In my web applicaton I use OpenJPA on Apache Tomcat (TomEE)/7.0.37 server. I use Netbeans to auto generate class ("Entity Class from database..." and "Session Beans From Entity Class..."). At SessionBean (for example UserFacade) i want to get EntityManager: @Stateless public class UserFacade extends AbstractFacade<User> { @PersistenceContext(unitName = "CollDocPU") private EntityManager em; @Override protected EntityManager getEntityManager() { return em; } } but when i get it by above way I get null. When I make it by: @Override protected EntityManager getEntityManager() {

Edit: not duplicate but almost I would like to have my app persistence.xml to be something like <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> <persistence-unit name="appName" transaction-type="RESOURCE_LOCAL"> <provider>org.hibernate.ejb.HibernatePersistence</provider> <properties> <property name="hibernate.dialect" value="${db.dialect'}"/> <property name=

I'm trying to get started with using Guice Persist and JPA, which recommends using configuration via persistence.xml. Coming from a native Hibernate background where configuration was obtained programmatically, is there a simple way to configure a JpaPersistModule without a persistence.xml file, or will a rump persistence.xml always have to exist? If no such option exists, it might be the case where I might have to play around with PersistenceProvider (assuming the "default" parses persistence.xml somehow). Any tutorials on working with the JPA SPI? Javier Sánchez There is no need for

Error "No persistence.xml file found in project" in Eclipse. Aim: Create a new project GWT+App engine+Maven Steps to create this: Google eclipse plugin: select "New Web Application Project". set the name etc. right-click on the project > Configure > Convert to Maven... Fix jdoconfig.xml file: xsi has the wrong value. see Validating jdoconfig with incorrect url Then I get the above error. The file exists at scr/META-INF/persistence.xml and also war/WEB-INF/classes/META-INF/persistence.xml But is not being found. Notes: I installed plugins m2e, m2e-wtp and google eclipse plugin If you are using

I am very new to glassfish, JPA and so on and I have really problems with setting that up. What I am planning to do is a simple RESTful service with a persistent backend. I am using glassfish3 as application server and already deployed a simple REST service with the jersey-library. Now I want to provide access to a database via JPA. Glassfish is shipped with JavaDB/derby and EclipseLink, is that right? So, I want to use that :-) I created a persistence.xml in META-INF: <?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi=

At work we have an entity library which is used by several clients for the library (several servlets, a desktop application, etc.). The entity library consists of JPA-Annotated classes and most prominently a persistence.xml. All projects are configured using maven. Where should a persistence.xml file be put? It needs to be located inside the jar file of that entity library and I'm not sure how to configure this using maven. (We are just splitting up a project into several smaller projects) '''UPDATE''' To be clear about this, there is one Maven-Project A containing the persistence.xml and