Hello to all ...
I have to write an XML doc with GWT. I discovered that you can not do
client-side but it can be done with server-side.
So I setup the synchronous and asynchronous client-side:
package com.example.foobar.client ;
import com.google.gwt.user.client.rpc.RemoteService;
public interface extends RPCInterface RemoteService {
testRPC public String (String message);
}
--------------------------------------------------
-------------------------------------------------
package com.example.foobar.client ;
import com.google.gwt.user.client.rpc.AsyncCallback;
public interface RPCInterfaceAsync {
testRPC void (String message, AsyncCallback callback <String>);
}
--------------------------------------------------
-----------------------------------------------
while on the server-side I did:
import java.io.BufferedWriter;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.text.DateFormat;
import java.util.Date;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.example.foobar.client.RPCInterface;
public class extends RPCImpl RemoteServiceServlet implements
RPCInterface {
private static final long serialVersionUID = 1L;
testRPC public String (String message)
{
Date now = new Date ();
Dtm DateFormat.getTimeInstance String = (DateFormat.MEDIUM.) Format
(now);
try {
BufferedWriter out = new BufferedWriter (new FileWriter ("test.txt"));
out.write (message);
out.close ();
} Catch (IOException e) {
}
return "This is my message" + message;
}
}
--------------------------------------------------
-------------------------------------------------- ---------
I have not forgotten anything in the matter, because before you use
the class FileWriter and BufferedWriter the program run smoothly.
I have these errors:
ERROR] javax.servlet.ServletContext log: Exception while dispatching
incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method
'public abstract java.lang.String
com.example.foobar.client.RPCInterface.testRPC (java.lang.String)'
Threw an unexpected exception: java. lang.NoClassDefFoundError:
java.io.FileWriter is a restricted class. Please see the Google App
Engine developer's guide for more details.
at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure
(RPC.java: 378)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
(RPC.java: 581)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall
(RemoteServiceServlet.java: 207)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost
(RemoteServiceServlet.java: 243)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost
(AbstractRemoteServiceServlet.java: 62)
at javax.servlet.http.HttpServlet.service (HttpServlet.java: 713)
at javax.servlet.http.HttpServlet.service (HttpServlet.java: 806)
at org.mortbay.jetty.servlet.ServletHolder.handle (ServletHolder.java:
511)
at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter
(ServletHandler.java: 1166)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter
(ServeBlobFilter.java: 58)
at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter
(ServletHandler.java: 1157)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
(TransactionCleanupFilter.java: 43)
at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter
(ServletHandler.java: 1157)
at com.google.appengine.tools.development.StaticFileFilter.doFilter
(StaticFileFilter.java: 122)
at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter
(ServletHandler.java: 1157)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java: 388)
at org.mortbay.jetty.security.SecurityHandler.handle
(SecurityHandler.java: 216)
at org.mortbay.jetty.servlet.SessionHandler.handle
(SessionHandler.java: 182)
at org.mortbay.jetty.handler.ContextHandler.handle
(ContextHandler.java: 765)
at org.mortbay.jetty.webapp.WebAppContext.handle (WebAppContext.java:
418)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle
(DevAppEngineWebAppContext.java: 70)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java: 152)
com.google.appengine.tools.development.JettyContainerService at $
ApiProxyHandler.handle (JettyContainerService.java: 349)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java: 152)
at org.mortbay.jetty.Server.handle (server.jar: 326)
at org.mortbay.jetty.HttpConnection.handleRequest
(HttpConnection.java: 542)
org.mortbay.jetty.HttpConnection at $ RequestHandler.content
(HttpConnection.java: 938)
at org.mortbay.jetty.HttpParser.parseNext (HttpParser.java: 755)
at org.mortbay.jetty.HttpParser.parseAvailable (HttpParser.java: 218)
at org.mortbay.jetty.HttpConnection.handle (HttpConnection.java: 404)
at org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java: 409)
org.mortbay.thread.QueuedThreadPool at $ PoolThread.run
(QueuedThreadPool.java: 582)
Caused by: java.lang.NoClassDefFoundError: java.io.FileWriter is a
restricted class. Please see the Google App Engine developer's guide
for more details.
at com.google.appengine.tools.development.agent.runtime.Runtime.reject
(Runtime.java: 51)
at com.example.foobar.server.RPCImpl.testRPC (RPCImpl.java: 41)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java: 39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java: 25)
at java.lang.reflect.Method.invoke (Method.java: 597)
at com.google.appengine.tools.development.agent.runtime.Runtime.invoke
(Runtime.java: 100)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse
(RPC.java: 562)
... 30 more
Someone can give me a hand? Please, do not know how to do ...:(
Thanks to all
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