View Javadoc

1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  package org.eclipse.jetty.osgi.httpservice;
20  
21  import java.io.IOException;
22  
23  import javax.servlet.ServletException;
24  import javax.servlet.http.HttpServletRequest;
25  import javax.servlet.http.HttpServletResponse;
26  
27  import org.eclipse.jetty.server.Request;
28  import org.eclipse.jetty.servlet.ErrorPageErrorHandler;
29  
30  /**
31   * Extended error page handler.
32   * Makes it easy to plug a servlet to handle errors thrown by the HttpService or
33   * to use Jetty's ErrorPageErrorHandler API to plug custom error pages.
34   */
35  public class HttpServiceErrorPageErrorHandler extends ErrorPageErrorHandler
36  {
37  
38  	private static HttpServiceErrorPageErrorHandler INSTANCE;
39  	
40  	public static HttpServiceErrorPageErrorHandler getInstance()
41  	{
42  		return INSTANCE;
43  	}
44  	
45  	public HttpServiceErrorPageErrorHandler()
46  	{
47  		INSTANCE = this;
48  	}
49  
50  	@Override
51  	public void handle(String target, Request baseRequest,
52  			HttpServletRequest request, HttpServletResponse response)
53  			throws IOException {
54  		if (HttpServiceErrorHandlerHelper.getCustomErrorHandler() != null)
55  		{
56  			try
57  			{
58  				HttpServiceErrorHandlerHelper.getCustomErrorHandler().service(request, response);
59  			}
60  			catch (ServletException e)
61  			{
62  				//well
63  			}
64  		}
65  		if (!response.isCommitted())
66  		{
67  			super.handle(target, baseRequest, request, response);
68  		}
69  	}
70  
71  	@Override
72  	protected void doStop() throws Exception
73  	{
74  		INSTANCE = null;
75  		super.doStop();
76  	}
77  	
78  	
79  	
80  }