Hi, Since you are using an XA DataSource you need a some transaction support. I'll assume you have a JTA service implementation, but if you grab the transaction/transaction-wrappers project it will adapt your XADataSource into a DataSource.
You'll need to change the lookup back to DataSource. Alasdair Nottingham On 18 Sep 2010, at 08:41, Bengt Rodehav <[email protected]> wrote: > Thanks a lot Valentin! > > You were right about those 2 issues. I now got further but not all the way. > The first time I use an entity manager: > > mEntityManager.persist(theAccount) > > I get the following exception: > > Caused by: java.lang.ClassCastException: > $javax.sql.XADataSource$$EnhancerByCGLIB$$755fe697 cannot be cast to > javax.sql.DataSource > at > org.apache.aries.jpa.container.unit.impl.DelayedLookupDataSource.getDs(DelayedLookupDataSource.java:43) > at > org.apache.aries.jpa.container.unit.impl.DelayedLookupDataSource.getConnection(DelayedLookupDataSource.java:60) > at > org.apache.openjpa.lib.jdbc.DelegatingDataSource.getConnection(DelegatingDataSource.java:137) > at > org.apache.openjpa.lib.jdbc.DecoratingDataSource.getConnection(DecoratingDataSource.java:112) > at > org.apache.openjpa.jdbc.schema.DataSourceFactory.installDBDictionary(DataSourceFactory.java:239) > ... 51 more > > Seems like OpenJPA wants a javax.sql.DataSource but is given something else. > The entity manager is injected using Blueprint as follows: > > <?xml version="1.0" encoding="UTF-8"?> > <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"; > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0"; > xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.0.0"; > xmlns:jpa="http://aries.apache.org/xmlns/jpa/v1.0.0";> > > <bean id="accountServiceImpl" > class="se.digia.sts.refdata.impl.AccountServiceImpl"> > <tx:transaction method="*" value="Required" /> > <jpa:context property="entityManager" unitname="refdataPU" /> > </bean> > > <service ref="accountServiceImpl" > interface="se.digia.sts.refdata.api.IAccountService"> > </service> > </blueprint> > > Any thoughts? > > /Bengt > > > 2010/9/18 Valentin Mahrwald <[email protected]> > Hi Bengt, > > the error you see in my experience is almost always due to the > jta-data-source not being found, OpenJPA then goes on to try creating a data > source from the properties (in the persistence.xml not the ones in blueprint) > where you have nothing specified. > > In your persistence xml I think where you have: >> <jta-data-source>osgi:services/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/refdatajta)</jta-data-source> > it should be >> <jta-data-source>osgi:service/javax.sql.XADataSource/(osgi.jndi.service.name=jdbc/refdatajta)</jta-data-source> > > Two things there: > - the url namespace is org:service, not osgi:services > - the interface needs to match what you export in blueprint below where you > have javax.sql.XADataSource rather than just javax.sql.DataSource > > Hope this helps :) > > Valentin > > On 18 Sep 2010, at 11:11, Bengt Rodehav wrote: > >> I cannot seem to get OpenJPA and MySQL to work in Aries. I use Aries >> 0.2-incubating, OpenJPA 2.0.1 and the 5.1.13 version of MySQL's JDBC driver. >> >> I have no problems connecting to MySQL outside of OSGi but cannot get it to >> work in OSGi. BTW I mostly use PaxExam for the Aries tests and I run on >> Felix 2.0.0. >> >> My persistence.xml looks as follows: >> >> <?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_2_0.xsd"; >> version="2.0"> >> <persistence-unit name="refdataPU" transaction-type="JTA"> >> >> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider> >> >> <jta-data-source>osgi:services/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/refdatajta)</jta-data-source> >> <class>se.digia.sts.refdata.domain.Account</class> >> <class>se.digia.sts.refdata.domain.BusinessUnit</class> >> <class>se.digia.sts.persistence.EntityBase</class> >> <exclude-unlisted-classes>true</exclude-unlisted-classes> >> <properties> >> <property name="openjpa.Connection2URL" >> value="jdbc:mysql://localhost:3306/refdata" /> >> <property name="openjpa.Connection2DriverName" >> value="com.mysql.jdbc.Driver" /> >> <property name="openjpa.Connection2UserName" value="someuser" /> >> <property name="openjpa.Connection2Password" value="somepassword" /> >> <property name="openjpa.ConnectionFactoryMode" value="managed" /> >> <property name="openjpa.jdbc.SynchronizeMappings" >> value="buildSchema(ForeignKeys=true)" /> >> <property name="openjpa.jdbc.DBDictionary" >> value="org.apache.openjpa.jdbc.sql.MySQLDictionary" /> >> <property name="openjpa.jdbc.UpdateManager" value="operation-order" /> >> <property name="openjpa.Log" value="DefaultLevel=TRACE, Tool=INFO" /> >> </properties> >> </persistence-unit> >> </persistence> >> >> and the blueprint for my datasource looks as follows: >> >> <?xml version="1.0" encoding="UTF-8"?> >> <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"; >> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; >> xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0"; >> default-activation="lazy"> >> >> <bean id="refdataXADataSource" >> class="com.mysql.jdbc.jdbc2.optional.MysqlXADataSource"> >> <property name="user" value="someuser" /> >> <property name="password" value="somepassword" /> >> <property name="URL" value="jdbc:mysql://localhost:3306/refdata" /> >> <!-- <property name="driverClassName" value="com.mysql.jdbc.Driver" >> />--> >> <!-- <property name="url" value="jdbc:mysql://localhost:3306/refdata" >> />--> >> </bean> >> >> <service ref="refdataXADataSource" interface="javax.sql.XADataSource"> >> <service-properties> >> <entry key="osgi.jndi.service.name" value="jdbc/refdatajta" /> >> </service-properties> >> </service> >> >> </blueprint> >> >> I get the following exception: >> >> <openjpa-2.0.1-r422266:989424 nonfatal general error> >> org.apache.openjpa.persistence.PersistenceException: There were errors >> initializing your configuration: <openjpa-2.0.1-r422266:989424 fatal user >> error> org.apache.openjpa.util.UserException: A connection could not be >> obtained for driver class "null" and URL "null". You may have specified an >> invalid URL. >> at >> org.apache.openjpa.jdbc.schema.DataSourceFactory.newConnectException(DataSourceFactory.java:261) >> at >> org.apache.openjpa.jdbc.schema.DataSourceFactory.installDBDictionary(DataSourceFactory.java:247) >> at >> org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getConnectionFactory(JDBCConfigurationImpl.java:728) >> >> >> I've tried numerous ways to configure the MysqlXADataSource to no avail. >> Seems like this must be a very common combination which leads me to hope >> that someone can help me out. The only samples I've seen in combination with >> Aries uses a Derby database that doesn't seem to need any configuration. >> >> I don't think there is anything wrong with the actual settings (user, >> password, URL) since they work perfectly outside of OSGi. However, the >> settings don't seem to get to the data source. I've probably not fully >> understood how this works. My next step would be to somehow configure a >> connection pool but it seems like just getting things to work occupies most >> of time right now. >> >> Any clues? >> >> /Bengt >> > >
