I'm working with jboss wildfly 9. I have a provider deployed as module into the :

    wildfly > modules > com > mycompany > myprovider

folder. Then i have a jpa project with DAO pattern writing and reading inside my database. I want to handle the DAO transaction using JTA but in order to make the DAO class visibile to myprovider i need to put the DAO JPA project inside the modules directory too.

Now face the real problem: it seems i cannot use the @PersistenceContext annotation to inject the entity managare into my EntityManager varible:

    @PersistenceContext(unitName = "KAS-Mapping")  private EntityManager entityManager;

this is my persistence.xml

    

    <persistence version="2.1" ...>

        <persistence-unit name="KAS-Mapping">

            <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> 

                <class>my.class.persistence.model.MapGroup</class>

                <clas>my.class.persistence.model.MapUser</class>

                <properties>

                    <property name="javax.persistence.provider" value="org.hibernate.ejb.HibernatePersistence" />

                    <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect"/>

                    <property name="javax.persistence.provider" value="org.hibernate.jpa.HibernatePersistenceProvider"/>

                    <property name="javax.persistence.transactionType" value="JTA"/>

                    <property name="javax.persistence.jtaDataSource" value="java:jboss/datasources/MyDS"/>

            </properties>

        </persistence-unit>

    </persistence> 

Why i cannot inject the a context into a jar modules? What am i wrong?