Hi,

I tried to work with more than one persistence-units. I use a process-engine (camunda) which uses a h2 database (persistence-unit primary).

I want to save some other data in a mysql database. I tried to configure it with a xa datasource because the non-xa datasource does not work. But I still get the error "Persistence unitName was not specified and there are 2 persistence unit definitions in application deployment".

Here is my code:

<?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="primary">

    <jta-data-source>java:jboss/datasources/ProcessEngine</jta-data-source>

    <properties>

      <!-- Properties for Hibernate -->

      <property name="hibernate.hbm2ddl.auto" value="create-drop" />

      <property name="hibernate.show_sql" value="true" />

    </properties>

  </persistence-unit>

   <persistence-unit name="processEntities">

   <provider>org.hibernate.ejb.HibernatePersistence</provider>

    <jta-data-source>java:/ProcessDBXADS</jta-data-source>

    <properties>

      <!-- Properties for Hibernate -->

            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>

            <property name="hibernate.hbm2ddl.auto" value="update" />

    </properties>

  </persistence-unit>

</persistence>

I have got a student entity which belongs to the persistence context which uses mysql:

@Entity

@Table(name = "student")

@PersistenceContext(name = "processEntities")

public class Student extends Person {

My EJB:

@Stateless

@Named

public class BPPBusinessLogic {

  @PersistenceContext(name = "processEntities")

  private EntityManager entityManager;

Here are the datasource configurations in my standalone.xml. I tested the connection via the wildfly admin console and it works.

<xa-datasource jndi-name="java:/ProcessDBXADS" pool-name="ProcessDBXADS" enabled="true" use-ccm="false">

                    <xa-datasource-property name="ServerName">localhost</xa-datasource-property>

                    <xa-datasource-property name="DatabaseName">

                        testprocessdb2

                    </xa-datasource-property>

                    <xa-datasource-property name="PortNumber">

                        3306

                    </xa-datasource-property>

                    <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class>

                    <driver>mysql-connector-java-5.1.47-bin.jar_com.mysql.jdbc.Driver_5_1</driver>

                    <security>

                        <user-name>xxxx</user-name>

                        <password>xxxx</password>

                    </security>

                    <validation>

                        <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/>

                        <background-validation>true</background-validation>

                        <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/>

                    </validation>

                </xa-datasource>

<datasource jta="true" jndi-name="java:jboss/datasources/ProcessEngine" pool-name="ProcessEngine" enabled="true" use-java-context="true" use-ccm="true">

                    <connection-url>jdbc:h2:./camunda-h2-dbs/process-engine;DB_CLOSE_DELAY=-1;MVCC=TRUE;DB_CLOSE_ON_EXIT=FALSE</connection-url>

                    <driver>h2</driver>

                    <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>

                    <security>

                        <user-name>sa</user-name>

                        <password>sa</password>

                    </security>

               </datasource>

Thanks for your help!

Nicole