org.apache.tapestry5.internal.services.DefaultRequestExceptionHandler Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of tapestry-core Show documentation
Show all versions of tapestry-core Show documentation
Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2006, 2008, 2010 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5.internal.services;
import java.io.IOException;
import java.net.URLEncoder;
import javax.servlet.http.HttpServletResponse;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.internal.structure.Page;
import org.apache.tapestry5.ioc.annotations.Symbol;
import org.apache.tapestry5.ioc.internal.util.InternalUtils;
import org.apache.tapestry5.services.ExceptionReporter;
import org.apache.tapestry5.services.RequestExceptionHandler;
import org.apache.tapestry5.services.Response;
import org.slf4j.Logger;
/**
* Default implementation of {@link RequestExceptionHandler} that displays the standard ExceptionReport page. The page
* must implement the {@link ExceptionReporter} interface.
*/
public class DefaultRequestExceptionHandler implements RequestExceptionHandler
{
private final RequestPageCache pageCache;
private final PageResponseRenderer renderer;
private final Logger logger;
private final String pageName;
private final Response response;
public DefaultRequestExceptionHandler(RequestPageCache pageCache, PageResponseRenderer renderer, Logger logger,
@Symbol(SymbolConstants.EXCEPTION_REPORT_PAGE)
String pageName,
Response response)
{
this.pageCache = pageCache;
this.renderer = renderer;
this.logger = logger;
this.pageName = pageName;
this.response = response;
}
public void handleRequestException(Throwable exception) throws IOException
{
logger.error(ServicesMessages.requestException(exception), exception);
// TAP5-233: Make sure the client knows that an error occurred.
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
String rawMessage = InternalUtils.toMessage(exception);
// Encode it compatibly with the JavaScript escape() function.
String encoded = URLEncoder.encode(rawMessage, "UTF-8").replace("+", "%20");
response.setHeader("X-Tapestry-ErrorMessage", encoded);
Page page = pageCache.get(pageName);
ExceptionReporter rootComponent = (ExceptionReporter) page.getRootComponent();
// Let the page set up for the new exception.
rootComponent.reportException(exception);
renderer.renderPageResponse(page);
}
}