Hi all,
at first, CDI + CODI is really cool stuff for building a webapp.
1) Our Environment:
We are using OWB 1.1.3, CODI 1.0.2 on a Tomcat 7 environment with CODI
@Transactional.
Database Producer:
@PersistenceContext(unitName = "myunit")
private EntityManager extendedEntityManager;
@Produces
@ConversationScoped
@MyQualifier
public ExtendedEntityManager createExtendedEntityManager() {
return new ExtendedEntityManager(this.extendedEntityManager);
}
public void dispose(@Disposes @Siemens ExtendedEntityManager
extendedEntityManager) {
if (extendedEntityManager.isOpen()) {
extendedEntityManager.close();
}
}
-DatabaseService which gets above EntityManager injected
-OtherServices which getting the database Service injected
2) The Problem:
Using Quartz, Seam Cron or the following class, which creates a thread, leads
into the same problem.
@ApplicationScoped
public class ApplicationTimer {
@Inject
private Log log;
@Inject
private OtherService otherService; // gets databaseService injected,
databaseService gets EntityManager injected
public void init() {
log.info("initialize timer thread");
try {
otherService.doSomething(); // WORKS in Context of this ApplicationScoped
bean
} catch (Exception e) {
log.error(e);
}
Thread timer = new Thread() {
public void run() {
while (true) {
log.info("That's the thread");
try {
otherService.doSomething(); // EXCEPTION occurs in Child Thread
Thread.sleep(5000);
} catch (Exception e) {
log.error(e);
}
}
}
};
timer.start();
}
}
An exception
javax.enterprise.context.ContextNotActiveException: WebBeans context with scope
type annotation @ConversationScoped does not exist within current thread
occurs
We also tried to start a (javax) Conversation. Leads into the same Excpetion
with ... a @RequestScoped does not exist.
The child thread is not in context of a web request, we guess the EntityManager
have to (as descriped in CODI doc).
But how to solve this problem?
Is there a possibility to create/provide an appropriate context to the child
thread or to start scheduled services in another way?
Best Regards
Erwin
