/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.isis.core.webapp.diagnostics;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Simply logs the URL of any request that causes an exception to be thrown.
*/
public class IsisLogOnExceptionFilter implements Filter {
private static final Logger LOG = LoggerFactory.getLogger(IsisLogOnExceptionFilter.class);
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
try {
chain.doFilter(request, response);
} catch (IOException ex) {
logRequestUrl(request, ex);
throw ex;
} catch (ServletException ex) {
logRequestUrl(request, ex);
throw ex;
} catch (RuntimeException ex) {
logRequestUrl(request, ex);
throw ex;
}
}
private static void logRequestUrl(ServletRequest request, Exception e) {
if(!(request instanceof HttpServletRequest)) {
return;
}
final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
final StringBuffer buf = httpServletRequest.getRequestURL();
final String queryString = httpServletRequest.getQueryString();
if(queryString != null) {
buf.append('?').append(queryString);
}
LOG.error("Request caused " + e.getClass().getName() + ": " + buf.toString(), e);
}
}