Is it safe to manually start a new thread in Java EE?

Question

I could not find a definitive answer to whether it is safe to spawn threads within session-scoped JSF managed beans. The thread needs to call methods on the stateless EJB in

Answer 1

I tried this and works great from my JSF managed bean

ExecutorService executor = Executors.newFixedThreadPool(1);

@EJB
private IMaterialSvc materialSvc;

private void updateMaterial(Material material, String status,  Location position) {

    executor.execute(new Runnable() {
        public void run() {
            synchronized (position) {
                // TODO update material in audit? do we need materials in audit?
                int index = position.getMaterials().indexOf(material);
                Material m = materialSvc.getById(material.getId());
                m.setStatus(status);
                m = materialSvc.update(m);
                if (index != -1) {
                    position.getMaterials().set(index, m);
                }

            }
        }
    });

}

@PreDestroy
public void destory() {
    executor.shutdown();
}