Question

I ve a stateful and a singelton EJBBean.

The stateful bean uses the entity manager (injected) and calls the singelton bean. The singelton bean uses the entity manager (injected).

If i try to call the singelton bean from the stateful bean, the singelton bean doesn t get an entity manager injected.

Is it not possible to get an entity manager in both beans at the same time?

EJB Bean

@Singleton
@LocalBean
public class AllocationPlanController implements AllocationPlanControllerRemote {

@PersistenceContext
private EntityManager em;

EJB Bean 2

@Stateful
@LocalBean
public class AllocationController implements AllocationControllerRemote {

@PersistenceContext
private EntityManager em;

private Allocation allocation;
private AllocationPlan allocationPlan;

AllocationPlanController allocationPlanController = new AllocationPlanController();

Answer 1

。由于你是创建<代码>的“manually”的代号:AlpositionPlanController的例。您应将<代码>AlpositionPlanController注入 bean,让该集装箱管理其生命周期。

Answer 2

不要通过其建筑商创建新的分配方案管理员,而是试图将其理解为:

@EJB
AllocationPlanController allocationPlanController;

然后,该集装箱将把该信标注入,而且由于该集装箱将注入其制造的灯塔,该集装箱本已注入其灭pen剂,因此你将发现em的非核值。

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