GWT RequestFactory：如何在一个方法中使用不同的请求类型

我在派生的RequestFactory中定义了两个实体和相应的两种请求类型。 当我在单元测试中持久化单个实体时，它可以正常工作。当我试图在同一个单元测试中一个接一个地持久化这两个实体时，第一个实体被存储，第二个火也以onSuccess结束，但数据库中没有存储任何数据。 我使用一个RequestFacory、一个EventBus和两个请求类型

当我将第二个persist.fire放入第一个onSuccess方法时，相应的onSuccess方法不会被命中，测试将在没有任何消息的情况下终止

如何在一个代码位置持久化两个不相关的实体

//Company
@Entity
public class Company {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(name = "version")
    private Integer version;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Integer getVersion() {
        return version;
    }

    public void setVersion(Integer version) {
        this.version = version;
    }

    private String instance;

    public static Company findCompany(Long id) {
        EntityManager em = emf.createEntityManager();
        try {
            Company company = em.find(Company.class, id);
            return company;
        } finally {
            em.close();
        }
    }

    public void persist() throws PersistenceException {
        EntityManager em = emf.createEntityManager();
        EntityTransaction tx = null;
        try {
            tx = em.getTransaction();
            tx.begin();
            em.persist(this);
            tx.commit();
        } catch (RuntimeException e) {
            tx.rollback();
            throw e;
        } finally {
            em.close();
        }
    }
}

//CompanyRequest
@Service(Company.class)
public interface CompanyRequest extends RequestContext {
    Request<CompanyProxy> findCompany(Long id);

    InstanceRequest<CompanyProxy, Void> persist();

    InstanceRequest<CompanyProxy, Void> remove();
}

//ServiceProvider
similar to Company with ServiceProviderRequest

//RequestFactory
public interface AftdRequestFactory extends RequestFactory {
    CompanyRequest companyRequest();
    ServiceProviderRequest serviceProviderRequest();
}

//UnitTest
public void testSetupDatabase() {
    final EventBus eventBus = new SimpleEventBus();
    final AftdRequestFactory requestFactory = GWT.create(AftdRequestFactory.class);
    requestFactory.initialize(eventBus);

    CompanyRequest request = requestFactory.companyRequest();
    CompanyProxy newCompany = request.create(CompanyProxy.class);
    newCompany.setInstance("1");
    request.persist().using(newCompany);
    request.fire(new Receiver<Void>() {
        @Override
        public void onSuccess(Void arg0) {
            ServiceProviderRequest spRequest = requestFactory.serviceProviderRequest();
            ServiceProviderProxy newServiceProvider = spRequest.create(ServiceProviderProxy.class);
            newServiceProvider.setInstance("12345");
            spRequest.persist().using(newServiceProvider);
            spRequest.fire(new Receiver<Void>() {
                @Override
                public void onSuccess(Void arg0) {
                    System.out.println("service provider instance created");
                }

                @Override
                public void onFailure(ServerFailure error) {
                }
           });

        }

        @Override
        public void onFailure(ServerFailure error) {
            System.out.println("could not create company instances");
        }
    });
}

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根本问题似乎是时间问题。当我在gwt单元测试的开头添加'delayTestFinish30000'时，主线程会等待足够长的时间，直到两个onSuccess方法都被调用并且异步线程完成