Hi, > I want to use openJPA but it seems like It doesn't want to work, OpenJPA likes the fact that you want to use OpenJPA. OpenJPA will work for you if you help it so that it can work correctly :)
Some of properties in your configuration file such as "openjpa.url" are named wrongly. It should be openjpa.ConnectionURL. See OpenJPA user manual for correct property names. [1] http://openjpa.apache.org/builds/latest/docs/manual/manual.html#openjpa.ConnectionURL alvaroCab wrote: > > Hello to everybody, I am following the book from IBM redbooks "Experience > JEE for Websphere" and I am making a project where I have created two JPA > Entities. Everything is set up correctly in my Eclipse IEE application, > the drivers, server connections and rest of things. I have created a JUnit > tester to test the JPA Entities. The problem is that when I execute the > tester, I get this error message: > > [EL Info]: 2009-12-21 > 09:24:32.462--ServerSession(1655333546)--EclipseLink, version: Eclipse > Persistence Services - 1.1.2.v20090612-r4475 > [EL Severe]: 2009-12-21 09:24:32.478--ServerSession(1655333546)--Local > Exception Stack: > Exception [EclipseLink-4021] (Eclipse Persistence Services - > 1.1.2.v20090612-r4475): > org.eclipse.persistence.exceptions.DatabaseException > Exception Description: Unable to acquire a connection from driver [null], > user [null] and URL [null]. Verify that you have set the expected driver > class and URL. Check your login, persistence.xml or sessions.xml > resource. The jdbc.driver property should be set to a class that is > compatible with your database platform > at > org.eclipse.persistence.exceptions.DatabaseException.unableToAcquireConnectionFromDriverException(DatabaseException.java:375) > > (....) > > My persistence.xml file is as follows: > > <<?xml version="1.0" encoding="UTF-8"?> > <persistence version="1.0" 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_1_0.xsd";> > <persistence-unit name="VacationUnit"> > > <class>vacation.entities.Employee</class> > <properties> > <property name="openjpa.url" > value="jdbc:derby://localhost:1527/Vacation" /> > <property name="openjpa.driver" > value="org.apache.derby.jdbc.ClientDriver" /> > <property name="openjpa.user" value="vacation" /> > property name="openjpa.password" value="vacation" /> > <property name="openjpa.Log" value="SQL=TRACE" /> > </properties> > </persistence-unit> > </persistence> > > If I add the line > <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider> > I get this error instead: > > Exception [EclipseLink-7060] (Eclipse Persistence Services - > 1.1.2.v20090612-r4475): > org.eclipse.persistence.exceptions.ValidationException > Exception Description: Cannot acquire data source [VacationPool]. > > If I change the openjpa provider to > <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> and > I make the calls with this provider, it works fine so it shows that the > drivers and the data pools work correctly. > > I want to use openJPA but it seems like It doesn't want to work, Does > anybody know wich could be the problem? > > Thanks! > ----- Pinaki -- View this message in context: http://n2.nabble.com/OpenJPA-not-connecting-the-database-tp4197138p4199480.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
