java - GWT 远程日志记录无法记录 Throwable Stacktrace？

Question

我想使用 GWT Remote Logging .这就是我所做的:

在我的 web.xml 文件中我做了:

<servlet>
        <servlet-name>remoteLogging</servlet-name>
        <servlet-class>com.google.gwt.logging.server.RemoteLoggingServiceImpl</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>remoteLogging</servlet-name>
        <url-pattern>/web/remote_logging</url-pattern>
    </servlet-mapping> 

在我的 gwt.xml 文件中我做了:

 <module rename-to='web'>

 ...    

 <inherits name="com.google.gwt.logging.Logging" />
    <set-property name="gwt.logging.logLevel" value="INFO" />
    <set-property name="gwt.logging.enabled" value="TRUE" />
    <set-property name="gwt.logging.popupHandler" value="DISABLED" />
    <set-property name="gwt.logging.developmentModeHandler" value="ENABLED" />  
    <set-property name="gwt.logging.simpleRemoteHandler" value="ENABLED" />

在我的 GWT Java 代码的某处，我做了:

Logger logger = Logger.getLogger("NameOfYourLogger");
logger.log(Level.SEVERE, "this message should get logged");

但是，当我尝试像这样记录堆栈跟踪(Throwable)时:

// Throwable throwable

LogRecord lr = new LogRecord(Level.SEVERE, "test");
lr.setThrown(throwable);
logger.log(lr);

我得到一个错误:

16:24:26.887 [ERROR] [web] Sun Feb 09 16:24:26 CET 2014 WireActivityLogger
SEVERE: Remote logging failed: 
com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException: java.lang.ClassCastException: com.google.gwt.core.client.impl.SerializableThrowable cannot be cast to com.google.gwt.core.shared.SerializableThrowable
    at com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException_FieldSerializer.instantiate(IncompatibleRemoteServiceException_FieldSerializer.java:16)
    at com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException_FieldSerializer.create(IncompatibleRemoteServiceException_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.GeneratedMethodAccessor103.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    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.GeneratedMethodAccessor101.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    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(Thread.java:722)

如何远程记录堆栈跟踪？

编辑:我也试过了

// Throwable throwable
LogRecord lr = new LogRecord(Level.SEVERE, throwable.toString());
logger.log(lr);

和

// Throwable throwable
LogRecord lr = new LogRecord(Level.SEVERE, throwable.getMessage());
logger.log(lr);

但是我得到了以下错误:

| Error 2014-02-19 02:21:04,017 [http-nio-8080-exec-7] ERROR [localhost].[/test]  - Exception while dispatching incoming RPC call
Message: Service method 'public abstract java.lang.String com.google.gwt.logging.shared.RemoteLoggingService.logOnServer(java.util.logging.LogRecord)' threw an unexpected exception: java.lang.NullPointerException
    Line | Method
->>  389 | encodeResponseForFailure in com.google.gwt.user.server.rpc.RPC
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    579 | invokeAndEncodeResponse  in     ''
|    265 | processCall . . . . . .  in com.google.gwt.user.server.rpc.RemoteServiceServlet
|    305 | processPost              in     ''
|     62 | doPost . . . . . . . . . in com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet
|     46 | doFilterInternal         in org.grails.jaxrs.web.JaxrsFilter
|     70 | doFilter . . . . . . . . in com.github.greengerong.PreRenderSEOFilter
|   1145 | runWorker                in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . . . . . . . .  in java.util.concurrent.ThreadPoolExecutor$Worker
^    722 | run                      in java.lang.Thread
Caused by NullPointerException: null
->>  262 | hash                     in java.util.Hashtable
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|    459 | get                      in     ''
|    489 | findLogger . . . . . . . in java.util.logging.LogManager$LoggerContext
|    910 | getLogger                in java.util.logging.LogManager
|    400 | demandLogger . . . . . . in     ''
|    317 | demandLogger             in java.util.logging.Logger
|    361 | getLogger . . . . . . .  in     ''
|     62 | logOnServer              in com.google.gwt.logging.server.RemoteLoggingServiceUtil
|     46 | logOnServer . . . . . .  in com.google.gwt.logging.server.RemoteLoggingServiceImpl
|    561 | invokeAndEncodeResponse  in com.google.gwt.user.server.rpc.RPC
|    265 | processCall . . . . . .  in com.google.gwt.user.server.rpc.RemoteServiceServlet
|    305 | processPost              in     ''
|     62 | doPost . . . . . . . . . in com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet
|     46 | doFilterInternal         in org.grails.jaxrs.web.JaxrsFilter
|     70 | doFilter . . . . . . . . in com.github.greengerong.PreRenderSEOFilter
|   1145 | runWorker                in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . . . . . . . .  in java.util.concurrent.ThreadPoolExecutor$Worker
^    722 | run                      in java.lang.Thread

编辑:

这是我使用的代码:

import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

new AsyncCallback<GetResults<ItemDto>>() {


            @Override
            public void onFailure(Throwable e) {
                Logger logger = Logger.getLogger("test");
                logger.log(Level.SEVERE, "this message should get logged");

                LogRecord lr = new LogRecord(Level.SEVERE, e.toString());
                logger.log(lr);

            }

            ...

}

Answer 1

考虑记录异常堆栈跟踪:

<set-property name="compiler.stackMode"   
     value="emulated" />  
<set-configuration-property name="compiler.emulatedStack.recordLineNumbers"   
     value="true"/>   
<set-configuration-property name="compiler.emulatedStack.recordFileNames"   
     value="true"/>   

堆栈跟踪和异常处理如下:

1. http://www.summa-tech.com/blog/2012/06/11/7-tips-for-exception-handling-in-gwt/

2. https://code.google.com/p/google-web-toolkit/wiki/WebModeExceptions