/*
* 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.nutch.webapp.servlet;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.nutch.plugin.Extension;
import org.apache.nutch.plugin.ExtensionPoint;
import org.apache.nutch.webapp.common.WebAppModule;
import org.apache.nutch.webapp.extension.UIExtensionPoint;
/**
* This Servlet is responsible for dispatching requests to jsp resources from
* plugins.
*/
public class JspDispatcherServlet extends NutchHttpServlet {
private static final long serialVersionUID = 1L;
HashMap allMappings = new HashMap();
public void init(ServletConfig conf) throws ServletException {
super.init(conf);
// TODO should perhaps first try handle core definitions
// process extensions
ExtensionPoint point = getServiceLocator().getPluginRepository()
.getExtensionPoint(UIExtensionPoint.X_POINT_ID);
if (point != null) {
Extension[] extensions = point.getExtensions();
for (int i = 0; i < extensions.length; i++) {
Extension extension = extensions[i];
WebAppModule module = new WebAppModule(extension.getDescriptor()
.getClassLoader(), conf);
Iterator iterator = module.getPaths().iterator();
while (iterator.hasNext()) {
String path = (String) iterator.next();
allMappings.put(path, module);
}
}
}
}
/**
* Process request to jsp inside plugin (jsps must be precompiled)
*
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//get jsp include path_info from request object
String relPath=(String)request.getAttribute("javax.servlet.include.path_info");
if (allMappings.containsKey(relPath)) {
WebAppModule module=(WebAppModule)allMappings.get(relPath);
module.dispatch(relPath, request,response);
}
}
}