there is no link to datasource(s) at all with this feature the need to force is mainly to keep backward compatibility
*Romain Manni-Bucau* *Twitter: @rmannibucau <https://twitter.com/rmannibucau>* *Blog: **http://rmannibucau.wordpress.com/*<http://rmannibucau.wordpress.com/> *LinkedIn: **http://fr.linkedin.com/in/rmannibucau* *Github: https://github.com/rmannibucau* 2013/2/22 Howard W. Smith, Jr. <smithh032...@gmail.com> > I agree, 'good need'. Hmmm, but why implement as follows? what is default > value? why the need to 'force'? > > configurable through > -Dopenejb.jpa.force.javax.persistence.provider=true|false > > I am specifying my datasource(s) in tomee.xml, it references the > jta-data-source name as defined in persistence.xml. I would assume this is > sufficient to specify as many persistence providers in persistence.xml and > as many resources in tomee.xml which reference jta-data-source name's > defined in persistence.xml. > > So, my tomee.xml contains the following: > > <Resource id="jdbc/mcmsJta" type="javax.sql.DataSource"> > JdbcDriver org.apache.derby.jdbc.EmbeddedDriver > JdbcUrl jdbc:derby:C:/javadb/databases/mcmsdev;create=true > UserName ... > Password ... > JtaManaged true > jmxEnabled true > LogSql false > InitialSize 10 > MaxActive 100 > MaxIdle 30 > MaxWait 10000 > minIdle 10 > suspectTimeout 60 > removeAbandoned true > removeAbandonedTimeout 180 > timeBetweenEvictionRunsMillis 30000 > jdbcInterceptors=StatementCache(max=128) > </Resource> > > > and persistence.xml contains the following: > > > <?xml version="1.0" encoding="UTF-8"?> > <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="mcmsPU" transaction-type="JTA"> > > <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> > <jta-data-source>jdbc/mcmsJta</jta-data-source> > <non-jta-data-source>jdbc/mcmsNonJta</non-jta-data-source> > <exclude-unlisted-classes>false</exclude-unlisted-classes> > <properties> > <property name="eclipselink.target-database" > > value="org.eclipse.persistence.platform.database.DerbyPlatform"/> > <property name="eclipselink.jdbc.cache-statements" value="true" /> > <property name="eclipselink.jdbc.cache-statements.size" value="100" > /> > <property name="eclipselink.logging.parameters" value="false" /> > </properties> > </persistence-unit> > </persistence> > > > > On Fri, Feb 22, 2013 at 8:47 AM, Romain Manni-Bucau > <rmannibu...@gmail.com>wrote: > > > Hi, > > > > good need: https://issues.apache.org/jira/browse/TOMEE-779 > > > > > > 2013/2/22 Lazar Kirchev <lazar.kirc...@gmail.com> > > > > > Hello, > > > > > > I would like to set eclipselink as the default persistence provider in > > > TomEE (which is done through system properties as I read in the > > > documentation), but still want to allow the applications to use other > > > providers (e.g. hibernate). > > > Is this possible? I see in the code that if the application specifies a > > > persistence provider in its persistence.xml, this is overriden by the > > value > > > of the system property, if one is set. > > > > > > Regars, > > > Lazar > > > > > >
