I'm writing a project with Eclipse using EclipseLink ,hsqldb and GWT . When
I try a do a RPC I always get stuck on this exception :
SEVERE: javax.servlet.ServletContext log: Exception while dispatching
incoming RPC call com.google.gwt.user.server.rpc.UnexpectedException:
Service method 'public abstract void
it.myProject.client.service.EmployeeService.createEmployee()' threw an
unexpected exception: javax.persistence.PersistenceException: No
persistence providers available for >"myDB" after trying the following
discovered implementations: org.datanucleus.api.jpa.PersistenceProviderImpl
This is my main file *myProject.java* where I execute the RPC:
public class MyProject implements EntryPoint {
private final EmployeeServiceAsync aService = (EmployeeServiceAsync)
GWT.create(EmployeeService.class);
@Override
public void onModuleLoad() {
aService.createEmployee(new AsyncCallback<Void>() {
@Override
public void onFailure(Throwable caught) {
Window.alert("Creation Employees failed!");
}
@Override
public void onSuccess(Void result) {
Window.alert("Creation success!");
}
});
I've specified the name of my Database and the provider in *persistence.xml*
:
<persistence-unit name="myDB" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
In my *build path* I've put: eclipselink.jar ; gwt-servlet.jar ; hsqldb.jar
; javax.persistence_2.0.4.jar ; persistence-api-sources-2.0.jar ;
smartgwt.jar
Please give any advices you think and feel free to ask if you need other
code or anything.
I'm blocked on this since a week and noone in the web seems to have the
same problem .
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