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当我尝试使用 RPC 在服务器上向客户端抛出异常时，我遇到了一些错误。我所拥有的是：一个自己的异常类：

package catan.user.session.shared;
public class SessionInvalidException extends Exception {
    private static final long serialVersionUID = 1L;
}

和 RPC 实现。

@SuppressWarnings("serial")
public class ProfileServiceImpl extends RemoteServiceServlet implements ProfileService{

    @Override
    public UserLight getUser() throws SessionInvalidException {
        SessionManager.getInstance().isSessionStillValid(this.getThreadLocalRequest());
        return ((UserLight)     this.getThreadLocalRequest().getSession(false).getAttribute("User")).clone();
    }
}

异常是在 SessionManager.getInstance().isSessionStillValid() 中引发的，当我运行我的程序时，我的日志中出现以下错误

Wed Aug 14 17:13:45 CEST 2013 catan.client.Catan
WARNING: Exception caught 

catan.user.session.shared.SessionInvalidException: null
at catan.user.session.shared.SessionInvalidException_FieldSerializer.instantiate(SessionInvalidException_FieldSerializer.java:16)
at catan.user.session.shared.SessionInvalidException_FieldSerializer.create(SessionInvalidException_FieldSerializer.java:25)
at com.google.gwt.user.client.rpc.impl.SerializerBase.instantiate(SerializerBase.java:115)
at com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader.deserialize(ClientSerializationStreamReader.java:396)
at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:119)
at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:216)
at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:258)
at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:412)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Unknown Source)
Aug 14, 2013 5:13:45 PM com.google.gwt.logging.server.RemoteLoggingServiceUtil     logOnServer

WARNING: Exception caught 

com.google.gwt.core.client.impl.SerializableThrowable$ThrowableWithClassName
at catan.user.session.shared.SessionInvalidException_FieldSerializer.instantiate(SessionInvalidException_FieldSerializer.java:16)
at catan.user.session.shared.SessionInvalidException_FieldSerializer.create(SessionInvalidException_FieldSerializer.java:25)
at com.google.gwt.user.client.rpc.impl.SerializerBase.instantiate(SerializerBase.java:115)
at com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader.deserialize(ClientSerializationStreamReader.java:396)
at com.google.gwt.user.client.rpc.impl.AbstractSerializationStreamReader.readObject(AbstractSerializationStreamReader.java:119)
at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:216)
at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:258)
at com.google.gwt.http.client.RequestBuilder$1.onReadyStateChange(RequestBuilder.java:412)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor34.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Unknown Source)

有趣的是，我在完全相同的包中以几乎完全相同的方式抛出了另一个异常，只是另一个名称，它起作用了......我只是不明白我做错了什么......

4

2 回答 2

0

确保异常类位于 *.gwt.xml 模块定义文件中的元素指定的路径上。例如：

<!-- Specify the paths for translatable code                    -->
<source path='client' />
<source path='shared' />
于 2013-08-14T18:54:47.007 回答
0

好的，我解决了我的问题。所以异常被RPC正确地传递给了客户端。然后在 onFailure 方法中，我将捕获的对象传递给我的 Logger 类，然后尝试将其发送回服务器或其他东西。我不确定这里，因为 Logger 类是由我的 Projekt 的另一个成员编写的。所以只是不使用这个类解决了这个问题，但我仍然不确定这些错误试图告诉我什么......如果有人在这里感兴趣是我将捕获的对象传递给的方法。Catan.class 是我们的 EntryPoint 类。

public class Logger {

/**
 * Logs a Throwable
 * @param caught
 */
public static void log(Throwable caught) {
    final java.util.logging.Logger log = java.util.logging.Logger.getLogger(Catan.class.getName());
    log.log(Level.WARNING, "Exception caught \n", caught);
}
于 2013-08-15T14:03:30.937 回答