Question

Context

I have a JBoss where I have sucessfully deployed a datasource mydatasource-ds.xml.
It’s JNDI name is java:mydatasourceDS. JBoss claims that the datasource is succesfully deployed. The JMX console agress too.

Problem

I want to use this datasource from a client java app launched on a separate JVM.
But I get an exception saying the java:mydatasourceDS cannot be found.

java.lang.ClassCastException: javax.naming.Reference cannot be cast to javax.sql.DataSource

Details

Here is the persistence.xml file :

<?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="mydatasource-db" transaction-type="JTA">
    <jta-data-source>java:mydatasourceDS</jta-data-source>
    <properties>
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />

        <property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
        <property name="hibernate.hbm2ddl.auto" value="update" />
        <property name="hibernate.default_schema" value="rec" />

        <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
    </properties>
</persistence-unit>

Here is the jndi.properties file :

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.provider.url=jnp://localhost:1099
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces

Here is the application classpath :

jndi.properties
log4j.properties
META-INF\persistence.xml
hibernate-jpa-2.0-api-1.0.0.Final.jar
jnp-client-5.0.3.GA.jar
jboss-common-core-2.2.14.GA.jar
jboss-logging-spi-2.1.0.GA.jar
hibernate-entitymanager-3.6.4.Final.jar
hibernate-core-3.6.4.Final.jar
antlr-2.7.6.jar
commons-collections-3.1.jar
dom4j-1.6.1.jar
hibernate-commons-annotations-3.2.0.Final.jar
jta-1.1.jar
javassist-3.12.0.GA.jar
slf4j-api-1.6.1.jar
slf4j-log4j12-1.6.1.jar
log4j-1.2.16.jar
xstream-1.4.1.jar
xmlpull-1.1.3.1.jar
xpp3_min-1.1.4c.jar

EDIT
I have found the source of the problem. The javax.sql.DataSource that was available to my client application was NOT the one received from JNDI. The one I receive from JNDI is the JBoss javax.sql.DataSource. Same name BUT slightly different classes hence the ClassCastException…

As of this writing, the JBoss javax.sql.DataSource can be found in this package : jboss-j2ee-4.2.3.GA.jar

Answer 1

This guide says that you have to set

<use-java-context>false</use-java-context>

in mydatasource-ds.xml. Not sure if you did.