Having trouble getting JPA to work on Wildfly 19.1 - jpa

Question

I am fairly new to Wildfly and really new to JPA. I get a null exception when I try to call a method from the DAO. I made some changes suggested using the #Stateless and #Inject annotations, but the DAO does not appear to be initializing at all. The object is null when I try to call the findAllClientCompanies method.
Here is the peristence.xml file.
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="miscPU">
<jta-data-source>java:/jdbc/misc</jta-data-source>
<properties>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.transaction.flush_before_completion" value="true"/>
</properties>
</persistence-unit>
<persistence-unit name="autojobsPU">
<jta-data-source>java:/jdbc/autojobs</jta-data-source>
<properties>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.transaction.flush_before_completion" value="true"/>
</properties>
</persistence-unit>
</persistence>
Here is the entity declaration:
#Entity
#Table(name="clientcompany")
public class ClientCompany extends Company implements Serializable {
Here is the dao, the findAllClientCompanies is the specific method that is blowing up with a null exception:
package com.lingosys.jpa;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.EntityTransaction;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import javax.persistence.Query;
import java.io.Serializable;
import java.util.List;
/**
*
* #author mphoenix
*/
#Stateless
public class ClientCompanyDAO implements Serializable {
#PersistenceContext(unitName="miscPU")
private EntityManager em;
public ClientCompanyDAO() {
}
public void create(ClientCompany clientCompany) {
em.persist(clientCompany);
}
public EntityTransaction getTransaction() {
return em.getTransaction();
}
public ClientCompany findClientCompany(int id) {
ClientCompany clientCompany = (ClientCompany) em.find(ClientCompany.class, id);
return clientCompany;
}
public List <ClientCompany> findAllClientCompanies() {
TypedQuery<ClientCompany> query = em.createQuery("select c from ClientCompany c", ClientCompany.class);
return query.getResultList();
}
public void delete(ClientCompany clientCompany) {
em.remove(em.contains(clientCompany) ? clientCompany:em.merge(clientCompany));
}
public int deleteAllClientCompanies() {
Query query = em.createQuery("delete from ClientCompany");
return query.executeUpdate();
}
}
And here is the JSF bean that calls the dao method:
#Inject
private ClientCompanyDAO daoClientCompany;
private boolean noValidEmail = false;
private String fakeEmailUserName = "";
private Connection conn;
private List<ClientCompany> unsortedList;
private String specialInstructions;
private String createdBy;
//XML processing variables
private Document document = null;
private String xmlMsgs = "";
private boolean xmlLoaderDisabled = false;
//prospect handling variables
private boolean prospectDisabled = false;
private static final String YES = "Yes";
//Legal entity based variables
boolean entitySet = false;
boolean lls = false;
boolean clientIDSet = false;
boolean billingInstructionsSet = false;
boolean billingEmailSet = false;
private static final String[] IS_LLS = {"LLS", "Coto/TI", "LLS-UK"};
boolean companyLoggedOn = false;
private boolean processDisabled = true;
private boolean userSpecificEntity = false;
/**
* Constructor initializes Web Service client, Hibernate DAOs, UI lists, and
* client view.
*
*/
public ClientCreatorBean() {
fmrws = new FormerWSOps();
try {
unsortedList = daoClientCompany.findAllClientCompanies();
view = fmrws.getClientCompanyView();
} catch (Exception ex) {
java.util.logging.Logger.getLogger(ClientCreatorBean.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
reset();

Answer 1

OK it looks like this problem had to do with my invoking the DAO in my constructor. I resolved it by putting the code in another method and prefacing that method with the #PostConstructor annotation.