/*
* ApplicationUncaughtExceptionHandler.java
*
* Copyright (C) 2009-12 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
package org.rstudio.studio.client.application;
import org.rstudio.studio.client.server.ClientException;
import org.rstudio.studio.client.server.Server;
import org.rstudio.studio.client.server.VoidServerRequestCallback;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;
import com.google.gwt.event.shared.UmbrellaException;
import com.google.inject.Inject;
import com.google.inject.Singleton;
@Singleton
public class ApplicationUncaughtExceptionHandler
implements UncaughtExceptionHandler
{
@Inject
public ApplicationUncaughtExceptionHandler(Server server)
{
server_ = server;
}
public void register()
{
// set uncaught exception handler (first save default so we can call it)
defaultUncaughtExceptionHandler_ = GWT.getUncaughtExceptionHandler();
GWT.setUncaughtExceptionHandler(this);
}
public void onUncaughtException(Throwable e)
{
logException(e);
}
private void logException(Throwable e)
{
try
{
// call the default handler if there is one
if (defaultUncaughtExceptionHandler_ != null)
defaultUncaughtExceptionHandler_.onUncaughtException(e);
// log uncaught exception
server_.logException(ClientException.create(unwrap(e)),
new VoidServerRequestCallback());
}
catch(Throwable throwable)
{
// make sure exceptions never escape the uncaught handler
}
}
private Throwable unwrap(Throwable e)
{
if (e instanceof UmbrellaException)
{
UmbrellaException ue = (UmbrellaException) e;
if(ue.getCauses().size() == 1)
return unwrap(ue.getCauses().iterator().next());
}
return e;
}
private final Server server_;
private UncaughtExceptionHandler defaultUncaughtExceptionHandler_ = null;
}