eclipselink

[msp]

Hallo,

ich versuche "frickele" gerade zum ersten mal mit jpa. leider komm ich einfach nicht weiter.

ich poste euch einfach mal was ich schon hab und die entsprechende fehlermeldung dazu.

com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract com.extjs.gxt.ui.client.data.PagingLoadResult com.mycompany.project.client.DeviceService.getDevices(com.extjs.gxt.ui.client.data.PagingLoadConfig)' threw an unexpected exception: javax.persistence.PersistenceException: No Persistence provider for EntityManager named devices
	at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:378)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:581)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:207)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:243)
	at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: javax.persistence.PersistenceException: No Persistence provider for EntityManager named devices
	at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
	at javax.persistence.Persistence.createEntityManagerFactory(Unknown Source)
	at com.mycompany.project.server.PersitenceTest.<init>(PersitenceTest.java:16)
	at com.mycompany.project.server.DeviceServiceImpl.getDevices(DeviceServiceImpl.java:25)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:562)
	... 22 more

persistence.xml
[XML]
<?xml version="1.0" encoding="UTF-8" ?>
<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"
version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="devices">
<class>com.mycompany.project.client.server.Device</class>
<properties>
<property name="javax.persistence.jdbc.driver" value="org.postgresql.Driver" />
<property name="javax.persistence.jdbc.url"
value="jdbcostgres://192.168.2.183:5432/xxx" />
<property name="javax.persistence.jdbc.user" value="xxx" />
<property name="javax.persistence.jdbc.password" value="xx" />

</properties>

</persistence-unit>
</persistence>
[/XML]

Device.java

package com.mycompany.project.server;

import javax.persistence.*;

@Entity
public class Device {
	@Id
	String mac;
	String firmware;
	String comment;
	
	public String getFirmware() {
		return firmware;
	}
	public void setFirmware(String firmware) {
		this.firmware = firmware;
	}
	public String getComment() {
		return comment;
	}
	public void setComment(String comment) {
		this.comment = comment;
	}

	@Override
	public String toString() {
		return "device [mac=" + mac + ", firmware=" + firmware + ", comment="+ comment +"]";
	}	
	
}

hier entsteht die Exception:

public class PersitenceTest {
	EntityManagerFactory factory;
	public PersitenceTest() {
	
	factory=Persistence.createEntityManagerFactory("devices");
		
	}
	
}

wie ihr seht bin ich noch nicht allzuweit gekommen


Ich hoffe euch reichen die Informationen um mir weiterzuhelfen. Danke schon mal im vorraus!


Mfg
MSP

 

[MySelV]

Hi,

in deiner Konfiguration fehlt in dem Tag <persistence-unit> etwas wie

[XML]<provider>org.hibernate.ejb.HibernatePersistence</provider>[/XML]

Musst du mal schauen, welchen du nutzen willst. Eclipselink hat glaube ich einen eigenen => Google

Grüße

 

[Deros]

<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>