Question

我注意到@ApplicationScoped注释仅用于errai文档中的模型/服务类。

我想知道是否可以将它与用户表面片段一起使用，例如@Templated个文件？例如，我有一个小部件在许多@Page上重复出现。我可以在@Inject注释中使用它的相同实例吗？

如果可以，我为什么会收到错误：

Uncaught Error: java.lang.IllegalStateException: This widget's parent does not implement HasWidgets
    at FBf_g$.tC_g$ [as createError_0_g$] (Throwable.java:121)
    at FBf_g$.DC_g$ [as initializeBackingError_0_g$] (Throwable.java:113)
    at FBf_g$.mC_g$ (Throwable.java:67)
    at FBf_g$.SC_g$ (Exception.java:29)
    at FBf_g$.$C_g$ (RuntimeException.java:29)
    at FBf_g$ (IllegalStateException.java:28)
    at xkj_g$.LBe_g$ [as removeFromParent_0_g$] (Widget.java:204)
    at xkj_g$ (TemplateWidget.java:43)
    at Eij_g$ (TemplateUtil.java:251)
    at mki_g$.yki_g$ [as createInstance_64_g$] (Type_factory__p_k_e_c_l_App__quals__j_e_i_Any_j_e_i_Default.java:652)
    at mki_g$.xki_g$ [as createInstance_2_g$] (Type_factory__p_k_e_c_l_App__quals__j_e_i_Any_j_e_i_Default.java:622)
    at rvi_g$.Wui_g$ [as createNewUnproxiedInstance_0_g$] (AbstractContext.java:85)
    at rvi_g$.Yui_g$ [as getActiveNonProxiedInstance_0_g$] (AbstractContext.java:78)
    at wyi_g$.Dyi_g$ [as trySettingInstance_0_g$] (ProxyHelperImpl.java:53)
    at wyi_g$.zyi_g$ [as getInstance_3_g$] (ProxyHelperImpl.java:42)
    at Uki_g$.gmi_g$ [as unwrap_1_g$] (Type_factory__p_k_e_c_l_App__quals__j_e_i_Any_j_e_i_Default.java:75)
    at Nvi_g$.Xvi_g$ [as getEagerInstance_0_g$] (ContextManagerImpl.java:72)
    at Nyi_g$.Wyi_g$ [as init_13_g$] (SyncBeanManagerImpl.java:103)
    at Nyi_g$.fzi_g$ [as setContextManager_0_g$] (SyncBeanManagerImpl.java:90)
    at d7h_g$.e7h_g$ [as bootstrapContainer_1_g$] (Container.java:80)
    at d7h_g$.g7h_g$ [as onModuleLoad_0_g$] (Container.java:40)
    at Array.Y9d_g$ (pl_00046korbeldaniel_00046erpe_00046App__EntryMethodHolder.java:3)
    at initializeModules_0_g$ (ModuleUtils.java:44)
    at Fcc_g$ (Impl.java:239)
    at Icc_g$ (Impl.java:298)
    at Impl.java:77
    at q9d_g$ (ModuleUtils.java:55)
    at MenuEntryWidget.java:43

每次我向@ApplicationScoped小部件类添加@Templated注释？

Answer 1

根据我的经验，您无法将@ApplicationScoped用于@Templated窗口小部件，@EntryPoint也可以是@Templated

嘿，这是一个例子：

@ApplicationScoped
@Templated
@EntryPoint
public class App extends Composite {
}

@ApplicationScoped注释可以与@Templated bean一起使用吗？

1 个答案: