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/*
* 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.tuscany.sca.host.webapp;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.apache.tuscany.sca.host.http.ServletHost;
/**
* A Servlet filter that forwards service requests to the Servlets registered with
* the Tuscany ServletHost.
*
* @version $Rev$ $Date$
*/
public class TuscanyServletFilter implements Filter {
private static final long serialVersionUID = 1L;
private Logger logger = Logger.getLogger(TuscanyServletFilter.class.getName());
private transient WebContextConfigurator configurator;
private transient ServletHost servletHost;
public TuscanyServletFilter() {
super();
}
public void init(final FilterConfig config) throws ServletException {
try {
configurator = WebAppHelper.getConfigurator(config);
WebAppHelper.init(configurator);
servletHost = WebAppHelper.getServletHost();
} catch (Throwable e) {
logger.log(Level.SEVERE, e.getMessage(), e);
configurator.getServletContext().log(e.getMessage(), e);
throw new ServletException(e);
}
}
public void destroy() {
WebAppHelper.stop(configurator);
servletHost = null;
}
public void doFilter(ServletRequest request, ServletResponse response, javax.servlet.FilterChain chain)
throws IOException, ServletException {
try {
// Get the Servlet path
HttpServletRequest httpRequest = (HttpServletRequest)request;
String path = httpRequest.getPathInfo();
if (path == null) {
path = httpRequest.getServletPath();
}
if (path == null) {
path = "/";
}
// Get a request dispatcher for the Servlet mapped to that path
RequestDispatcher dispatcher = servletHost.getRequestDispatcher(path);
if (dispatcher != null) {
// Let the dispatcher forward the request to the Servlet
dispatcher.forward(request, response);
} else {
// Proceed down the filter chain
chain.doFilter(request, response);
}
} catch (Throwable e) {
logger.log(Level.SEVERE, e.getMessage(), e);
configurator.getServletContext().log(e.getMessage(), e);
throw new ServletException(e);
}
}
}
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