validation - 使用 JBoss Errai 进行 Bean 验证

Question

我想使用 Errai 框架制作一个 GWT 应用程序，但在数据绑定(bind)和验证方面遇到了一些问题。

我的pom.xml

<dependency>

  <groupId>org.jboss.errai</groupId>

  <artifactId>errai-validation</artifactId>

  <version>${errai.version}</version>

</dependency>

<dependency>

  <groupId>javax.validation</groupId>

  <artifactId>validation-api</artifactId>

  <scope>provided</scope>

</dependency>

<dependency>

  <groupId>javax.validation</groupId>

  <artifactId>validation-api</artifactId>

  <classifier>sources</classifier>

  <scope>provided</scope>

</dependency>

<dependency>

  <groupId>org.hibernate</groupId>

  <artifactId>hibernate-validator</artifactId>

  <version>4.2.0.Final</version>

  <scope>provided</scope>

</dependency>

<dependency>

  <groupId>org.hibernate</groupId>

  <artifactId>hibernate-validator</artifactId>

  <version>4.2.0.Final</version>

  <scope>provided</scope>

  <classifier>sources</classifier>

</dependency>

我的 app.gwt.xml 包含 Errai-Validation 和 HibernateValidator 模块:

<inherits name="org.jboss.errai.validation.Validation" />
<inherits name="org.hibernate.validator.HibernateValidator" />

不存在 Unresolved 依赖关系，我已经对此进行了仔细检查。

当我尝试使用 mvn gwt:run 运行应用程序时，出现以下错误:

 java.util.concurrent.ExecutionException: org.jboss.errai.ioc.rebind.ioc.exception.UnsatisfiedDependenciesException:  @> org.jboss.errai.ui.nav.client.local.Navigation
- field org.jboss.errai.codegen.meta.MetaField:org.jboss.errai.ui.nav.client.local.Navigation.stateChangeEvent could not be satisfied for type: org.jboss.errai.ioc.client.lifecycle.api.StateChange
Message: can't resolve bean: org.jboss.errai.ioc.client.lifecycle.api.StateChange<java.lang.Object> ( @Default )
    at java.util.concurrent.FutureTask.report(FutureTask.java:122)
    at java.util.concurrent.FutureTask.get(FutureTask.java:188)
    at org.jboss.errai.config.rebind.AsyncGenerators$FutureWrapper.get(AsyncGenerators.java:112)
    at org.jboss.errai.config.rebind.AsyncGenerators$FutureWrapper.get(AsyncGenerators.java:86)
    at org.jboss.errai.config.rebind.AbstractAsyncGenerator.startAsyncGeneratorsAndWaitFor(AbstractAsyncGenerator.java:100)
    at org.jboss.errai.ioc.rebind.ioc.bootstrapper.IOCGenerator.generate(IOCGenerator.java:58)
    at com.google.gwt.core.ext.IncrementalGenerator.generateNonIncrementally(IncrementalGenerator.java:40)
    at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:657)
    at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:41)
    at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:79)
    at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:276)
    at com.google.gwt.dev.shell.ShellModuleSpaceHost.rebind(ShellModuleSpaceHost.java:141)
    at com.google.gwt.dev.shell.ModuleSpace.rebind(ModuleSpace.java:595)
    at com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate(ModuleSpace.java:465)
    at com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:49)
    at com.google.gwt.core.shared.GWT.create(GWT.java:57)
    at com.google.gwt.core.client.GWT.create(GWT.java:85)
    at org.jboss.errai.ioc.client.Container.bootstrapContainer(Container.java:64)
    at org.jboss.errai.ioc.client.Container.onModuleLoad(Container.java:41)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:406)
    at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
    at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:526)
    at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
    at java.lang.Thread.run(Thread.java:744)

这就是 Bootstrap 失败并且应用程序抛出 onModuleLoad 异常并且无法启动的原因。

如果我删除 2 个验证模块，我就可以启动应用程序而不会出现任何错误。

我正在使用 Errai 教程 3.0.1 FINAL 版。

感谢您的帮助:)

---

编辑:

我通过添加解决了错误

<inherits name="org.jboss.errai.ui.nav.Navigation" />

到我的app.gwt.xml，但现在我遇到了这个异常的下一个问题:

java.lang.RuntimeException: Deferred binding failed for 'org.jboss.errai.validation.client.ValidatorFactoryImpl$GwtValidator' (did you forget to inherit a required module?)    
at com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:53)     
at com.google.gwt.core.shared.GWT.create(GWT.java:57)   
at com.google.gwt.core.client.GWT.create(GWT.java:85)   
at org.jboss.errai.validation.client.ValidatorFactoryImpl.createValidator(ValidatorFactoryImpl.java:11)     
at com.google.gwt.validation.client.AbstractGwtValidatorFactory.getValidator(AbstractGwtValidatorFactory.java:90)   
at org.jboss.errai.validation.client.ValidatorProvider.get(ValidatorProvider.java:37)   
at org.jboss.errai.ioc.client.BootstrapperImpl$28.getInstance(BootstrapperImpl.java:432)    
at org.jboss.errai.ioc.client.BootstrapperImpl$28.getInstance(BootstrapperImpl.java:1)  
at org.jboss.errai.ioc.client.container.IOCDependentBean.getInstance(IOCDependentBean.java:96)  
at org.jboss.errai.ioc.client.container.IOCDependentBean.getInstance(IOCDependentBean.java:87)  
at org.jboss.errai.ioc.client.container.SyncToAsyncBeanManagerAdapter$1.getInstance(SyncToAsyncBeanManagerAdapter.java:148)     
at org.jboss.errai.ui.nav.client.local.spi.GeneratedNavigationGraph$2.produceContent(GeneratedNavigationGraph.java:69)  
at org.jboss.errai.ui.nav.client.local.Navigation.maybeShowPage(Navigation.java:304)    
at org.jboss.errai.ui.nav.client.local.Navigation.navigate(Navigation.java:249)     
at org.jboss.errai.ui.nav.client.local.Navigation.navigate(Navigation.java:230)     
at org.jboss.errai.ui.nav.client.local.Navigation.navigate(Navigation.java:225)     
at org.jboss.errai.ui.nav.client.local.Navigation.goTo(Navigation.java:191)     
at org.jboss.errai.ui.nav.client.local.DefaultNavigationErrorHandler.handleError(DefaultNavigationErrorHandler.java:27)     
at org.jboss.errai.ui.nav.client.local.Navigation.goTo(Navigation.java:193)

是否还缺少其他模块？

我认为 Errai 正在创建 ValidationFactory 并注入(inject)正确的实例，这是正确的吗？所以我不必像这里一样创建自己的 ValidationFactory:

GWT Validation Tutorial

Answer 1

是的，没错。您不必创建自己的 ValidationFactory。 Errai 将为您做到这一点。您可以简单地@Inject 验证器。

我已经使用 3.0.1.Final 准备了一个版本的 Errai 教程，它准确地显示了这一点(遵循 reference guide 的说明)。我已将项目放在 GitHub .

您粘贴的最后一个错误不包含足够的信息来调查为什么此操作失败。但是，您应该在开发模式控制台中看到更多错误信息。