While I was working on this blog, I encountered this error:

[INFO ] DSRA8203I: Database product name : MySQL
[INFO ] DSRA8204I: Database product version : 8.0.11
[INFO ] DSRA8205I: JDBC driver name : MySQL Connector/J
[INFO ] DSRA8206I: JDBC driver version : mysql-connector-java-8.0.11 (Revision: 6d4eaa273bc181b4cf1c8ad0821a2227f116fedf)
[INFO ] CWWJP9990I: test/wsjpa:wsjar:file:/home/dwuysan/dev/appservers/wlp/usr/servers/test/apps/expanded/test.war/WEB-INF/lib/d9f2b261-b3c6-4001-8a61-0aaebe46aa99.jar!/_testPU login successful
[INFO ] WELD-000900: 2.4.5 (Final)
[INFO ] FFDC1015I: An FFDC Incident has been created: "org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type EntityManager with qualifiers @Default
 at injection point [BackedAnnotatedField] @Inject private id.co.lucyana.test.services.LogService.em
 at id.co.lucyana.test.services.LogService.em(LogService.java:0)
 com.ibm.ws.container.service.state.internal.ApplicationStateManager 31" at ffdc_18.06.21_14.11.27.0.log
[INFO ] FFDC1015I: An FFDC Incident has been created: "com.ibm.ws.container.service.state.StateChangeException: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type EntityManager with qualifiers @Default
 at injection point [BackedAnnotatedField] @Inject private id.co.lucyana.test.services.LogService.em
 at id.co.lucyana.test.services.LogService.em(LogService.java:0)
 com.ibm.ws.app.manager.module.internal.DeployedAppInfoBase 384" at ffdc_18.06.21_14.11.27.1.log
[INFO ] CWWJP9990I: test/wsjpa:wsjar:file:/home/dwuysan/dev/appservers/wlp/usr/servers/test/apps/expanded/test.war/WEB-INF/lib/d9f2b261-b3c6-4001-8a61-0aaebe46aa99.jar!/_testPU logout successful
[ERROR ] CWWKZ0002E: An exception occurred while starting the application test. The exception message was: com.ibm.ws.container.service.state.StateChangeException: org.jboss.weld.exceptions.DeploymentException: WELD-001408: Unsatisfied dependencies for type EntityManager with qualifiers @Default
 at injection point [BackedAnnotatedField] @Inject private id.co.lucyana.test.services.LogService.em
 at id.co.lucyana.test.services.LogService.em(LogService.java:0)

The two classes we need to focus on are:

package id.co.lucyana.test.util;

import javax.enterprise.inject.Produces;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

public class EntityManagerProducer {
 
 @PersistenceContext(unitName = "testPU")
 @Produces
 private EntityManager em;
}

AND

package id.co.lucyana.test.services;

import id.co.lucyana.test.entity.Log;
import java.util.Collection;
import javax.ejb.LocalBean;
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.persistence.EntityManager;

@Stateless
@LocalBean
public class LogService {

 @Inject
 private EntityManager em;
 
 public Collection<Log> getLogs() {
 return this.em.createNamedQuery(Log.FIND_ALL, Log.class).getResultList();
 }
}

The thing is, this approach is working on both TomEE and Wildfly.

Any thought?

P.S. I was following someone’s recommendation on the net, of using this approach previously, with the argument that if one should ever change the name of ‘unitName’, it can be done on one single spot. I couldn’t find the reference anymore. I am not sure if this is still a ‘good’ approach. I welcome any comment.