001
014
015 package com.liferay.portal.kernel.servlet;
016
017 import com.liferay.portal.kernel.util.StringPool;
018
019 import java.io.IOException;
020
021 import java.util.HashMap;
022 import java.util.Map;
023
024 import javax.servlet.ServletException;
025 import javax.servlet.http.HttpServlet;
026 import javax.servlet.http.HttpServletRequest;
027 import javax.servlet.http.HttpServletResponse;
028
029
037 public class PortalDelegatorServlet extends HttpServlet {
038
039 public static void addDelegate(String subContext, HttpServlet delegate) {
040 if (subContext == null) {
041 throw new IllegalArgumentException();
042 }
043
044 if (delegate == null) {
045 throw new IllegalArgumentException();
046 }
047
048 _delegates.put(subContext, delegate);
049 }
050
051 public static void removeDelegate(String subContext) {
052 if (subContext == null) {
053 throw new IllegalArgumentException();
054 }
055
056 _delegates.remove(subContext);
057 }
058
059 public void service(
060 HttpServletRequest request, HttpServletResponse response)
061 throws IOException, ServletException {
062
063 String uri = request.getPathInfo();
064
065 if ((uri == null) || (uri.length() == 0)) {
066 throw new ServletException("Path information is not specified");
067 }
068
069 String[] paths = uri.split(StringPool.SLASH);
070
071 if (paths.length < 2) {
072 throw new ServletException("Path " + uri + " is invalid");
073 }
074
075 HttpServlet delegate = _delegates.get(paths[1]);
076
077 if (delegate == null) {
078 throw new ServletException(
079 "No servlet registred for context " + paths[1]);
080 }
081
082 Thread currentThread = Thread.currentThread();
083
084 ClassLoader contextClassLoader = currentThread.getContextClassLoader();
085
086 try {
087 ClassLoader delegateClassLoader =
088 delegate.getClass().getClassLoader();
089
090 currentThread.setContextClassLoader(delegateClassLoader);
091
092 delegate.service(request, response);
093 }
094 finally {
095 currentThread.setContextClassLoader(contextClassLoader);
096 }
097 }
098
099 private static Map<String, HttpServlet> _delegates =
100 new HashMap<String, HttpServlet>();
101
102 }