GWT服务器端验证和RPC序列化

Question

然后我尝试了ConstraintViolationException，但它也不起作用，原因还有一个（请参见下面的跟踪）。

我一定要捕获异常（ConstraintViolationException）而不是使用返回值吗？

com.google.gwt.user.client.rpc.SerializationException: Type 'org.hibernate.validator.engine.ConstraintViolationImpl' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.: instance = ConstraintViolationImpl{interpolatedMessage='{contact.validcompanyorperson}', propertyPath=, rootBeanClass=class com.mycompany.shared.foo.bar.MyBean, messageTemplate='{contact.validcompanyorperson}'}
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:667)
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
    at com.google.gwt.user.client.rpc.core.java.util.Collection_CustomFieldSerializerBase.serialize(Collection_CustomFieldSerializerBase.java:44)
    at com.google.gwt.user.client.rpc.core.java.util.HashSet_CustomFieldSerializer.serialize(HashSet_CustomFieldSerializer.java:39)
    at com.google.gwt.user.client.rpc.core.java.util.HashSet_CustomFieldSerializer.serializeInstance(HashSet_CustomFieldSerializer.java:51)
    at com.google.gwt.user.client.rpc.core.java.util.HashSet_CustomFieldSerializer.serializeInstance(HashSet_CustomFieldSerializer.java:28)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:788)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:669)
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
    at javax.validation.ConstraintViolationException_CustomFieldSerializer.serialize(ConstraintViolationException_CustomFieldSerializer.java:49)
    at javax.validation.ConstraintViolationException_CustomFieldSerializer.serializeInstance(ConstraintViolationException_CustomFieldSerializer.java:72)
    at javax.validation.ConstraintViolationException_CustomFieldSerializer.serializeInstance(ConstraintViolationException_CustomFieldSerializer.java:28)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeImpl(ServerSerializationStreamWriter.java:788)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:669)
    at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamWriter.writeObject(AbstractSerializationStreamWriter.java:126)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter$ValueWriter$8.write(ServerSerializationStreamWriter.java:153)
    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serializeValue(ServerSerializationStreamWriter.java:587)
    at com.google.gwt.user.server.rpc.RPC.encodeResponse(RPC.java:605)
    at com.google.gwt.user.server.rpc.RPC.encodeResponseForSuccess(RPC.java:471)
    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:563)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208)
    at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248)
    at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:442)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1083)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:640)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

20161114更新：我没主意了。我尝试在自己的源文件中复制ConstraintViolationImpl（hibernate-validator-4.1.0)并通过网络发送。由于“com.google.gwt.user.client.rpc.SerializationException：类型'com.mycompany.common.gwt.ui.shared.GWTConstraintViolution'未包含在可由此SerializationPolicy序列化的类型集中，或者无法加载其类对象”，因此无法工作。更多信息如下（Eclipse开发模式控制台）。

[DEBUG] [foo_bar] - Rebinding com.mycompany.IHM.client.gwt.foo.client.service.FooService
    [DEBUG] [foo_bar] - Invoking generator com.google.gwt.user.rebind.rpc.ServiceInterfaceProxyGenerator
        [DEBUG] [foo_bar] - Generating client proxy for remote service interface 'com.mycompany.IHM.client.gwt.foo.client.service.FooService'
            [DEBUG] [foo_bar] - Analyzing 'com.mycompany.IHM.client.gwt.foo.client.service.FooService' for serializable types
                [DEBUG] [foo_bar] - Analyzing methods:
                    [DEBUG] [foo_bar] - public abstract java.util.Set<com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>> getConstraintViolations2(com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean saisie)
                        [DEBUG] [foo_bar] - Return type: java.util.Set<com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>>
                            [DEBUG] [foo_bar] - java.util.Set<com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>>
                                [DEBUG] [foo_bar] - Verifying instantiability
                                    [DEBUG] [foo_bar] - java.util.TreeSet<com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>>
                                        [DEBUG] [foo_bar] - Checking parameters of 'java.util.TreeSet<com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>>'
                                            [DEBUG] [foo_bar] - Checking type argument 0 of type 'java.util.TreeSet<E>' because it is directly exposed in this type or in one of its subtypes
                                                [DEBUG] [foo_bar] - com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>
                                                    [DEBUG] [foo_bar] - Verifying instantiability
                                                        [DEBUG] [foo_bar] - com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>
                                                            [DEBUG] [foo_bar] - Analyzing the fields of type 'com.mycompany.commun.gwt.ui.shared.GwtConstraintViolation<com.mycompany.IHM.client.gwt.foo.shared.pack.MyBean>' that qualify for serialization
                                                                [DEBUG] [foo_bar] - private javax.validation.Path propertyPath
                                                                    [DEBUG] [foo_bar] - javax.validation.Path
                                                                        [DEBUG] [foo_bar] - Verifying instantiability
                                                                            [DEBUG] [foo_bar] - com.google.gwt.validation.client.impl.PathImpl
                                                                                [DEBUG] [foo_bar] - Analyzing the fields of type 'com.google.gwt.validation.client.impl.PathImpl' that qualify for serialization
                                                                                    [WARN] [foo_bar] - Field 'private final java.util.List<javax.validation.Path.Node> nodes' will not be serialized because it is final

GWTConstraintVielloy定义为“公共类GWTConstraintVielloy Isserializable实现ConstraintViellow,IsSerializable”（内容从Hibernate验证器复制粘贴）。我注释掉了Object字段，因为我知道GWT不喜欢这样。

Answer 1

不，根据GWT文档，您可以从RPC方法引发异常。

确切的处理取决于异常的类型：

• 对于检查的异常，在方法签名中将它们列为抛出就足够了
• 未经检查的异常被包装成invocationexception。原始异常记录在服务器端。