001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/portal/standard/sos/control/SOSClientRequestDispatcher.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042
043 ---------------------------------------------------------------------------*/
044 package org.deegree.portal.standard.sos.control;
045
046
047 import java.io.IOException;
048 import java.net.URL;
049
050 import javax.servlet.ServletConfig;
051 import javax.servlet.ServletException;
052 import javax.servlet.http.HttpServletRequest;
053 import javax.servlet.http.HttpServletResponse;
054
055 import org.deegree.enterprise.control.FormEvent;
056 import org.deegree.framework.log.ILogger;
057 import org.deegree.framework.log.LoggerFactory;
058 import org.deegree.framework.util.StringTools;
059 import org.deegree.framework.util.WebappResourceResolver;
060 import org.deegree.portal.standard.sos.configuration.SOSClientConfiguration;
061
062
063 /**
064 * Client request dispatcher based on CSW's one.
065 *
066 * @version $Revision: 9346 $
067 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
068 * @author <a href="mailto:taddei@lat-lon.de">Ugo Taddei</a>
069 */
070 public class SOSClientRequestDispatcher extends org.deegree.enterprise.control.RequestDispatcher {
071
072 private static final ILogger LOG = LoggerFactory.getLogger( SOSClientRequestDispatcher.class );
073
074
075 /**
076 * Comment for <code>ERROR_PAGE</code>
077 */
078 static String ERROR_PAGE = "error.jsp";
079
080 /**
081 * This method initializes the servlet.
082 *
083 * @param cfg the servlet configuration
084 *
085 * @throws ServletException an exception
086 */
087 public void init( ServletConfig cfg ) throws ServletException {
088 super.init( cfg );
089
090 try {
091 // initialize configuration of client and data servers
092 URL url = WebappResourceResolver.resolveFileLocation( getInitParameter( "Client.configFile" ),
093 this.getServletContext(), LOG);
094 SOSClientConfiguration.getInstance( url );
095
096 } catch ( Exception e ) {
097 e.printStackTrace();
098 throw new ServletException( StringTools.stackTraceToString( e.getStackTrace() ) );
099 }
100
101 if ( getInitParameter( "Client.errorPage" ) != null ) {
102 ERROR_PAGE = getInitParameter( "Client.errorPage" );
103 }
104 }
105
106 protected void service(HttpServletRequest request, HttpServletResponse response)
107 throws ServletException, IOException {
108
109 // create event out of request
110 FormEvent _event = createEvent( request );
111
112 // deliver event to application handler
113 deliverEvent( _event );
114
115 // get next page from request attribute
116 String nextPage = (String) request.getAttribute( "next" );
117
118 // show error page if next page is null
119 if ( nextPage == null ) nextPage = ERROR_PAGE;
120 nextPage = "/" + nextPage;
121
122 if ( request.getAttribute("javax.servlet.jsp.jspException") != null ) {
123 nextPage = "/" + ERROR_PAGE;
124 }
125
126 try {
127 request.setAttribute( "CONFIGURATION", SOSClientConfiguration.getInstance() );
128 } catch(Exception e) {
129 e.printStackTrace();
130 throw new ServletException( "could not create SOS client configuration" );
131 }
132 //FIXME throwing nasty exception when plaform doesn't exist -> handle this
133 // this exception is not showing up on error.jsp
134 // call request dispatcher
135 getServletConfig().getServletContext().getRequestDispatcher( nextPage ).forward( request, response );
136 _event = null;
137 }
138 }