001 //$HeadURL: svn+ssh://jwilden@svn.wald.intevation.org/deegree/base/branches/2.5_testing/src/org/deegree/portal/standard/sos/control/SOSClientRequestDispatcher.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.portal.standard.sos.control;
037
038
039 import java.io.IOException;
040 import java.net.URL;
041
042 import javax.servlet.ServletConfig;
043 import javax.servlet.ServletException;
044 import javax.servlet.http.HttpServletRequest;
045 import javax.servlet.http.HttpServletResponse;
046
047 import org.deegree.enterprise.control.FormEvent;
048 import org.deegree.framework.log.ILogger;
049 import org.deegree.framework.log.LoggerFactory;
050 import org.deegree.framework.util.StringTools;
051 import org.deegree.framework.util.WebappResourceResolver;
052 import org.deegree.portal.standard.sos.configuration.SOSClientConfiguration;
053
054
055 /**
056 * Client request dispatcher based on CSW's one.
057 *
058 * @version $Revision: 18195 $
059 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
060 * @author <a href="mailto:taddei@lat-lon.de">Ugo Taddei</a>
061 */
062 public class SOSClientRequestDispatcher extends org.deegree.enterprise.control.RequestDispatcher {
063
064 /**
065 *
066 */
067 private static final long serialVersionUID = 1533730388575870568L;
068
069
070 private static final ILogger LOG = LoggerFactory.getLogger( SOSClientRequestDispatcher.class );
071
072
073 /**
074 * Comment for <code>ERROR_PAGE</code>
075 */
076 static String ERROR_PAGE = "error.jsp";
077
078 /**
079 * This method initializes the servlet.
080 *
081 * @param cfg the servlet configuration
082 *
083 * @throws ServletException an exception
084 */
085 @Override
086 public void init( ServletConfig cfg ) throws ServletException {
087 super.init( cfg );
088
089 try {
090 // initialize configuration of client and data servers
091 URL url = WebappResourceResolver.resolveFileLocation( getInitParameter( "Client.configFile" ),
092 this.getServletContext(), LOG);
093 SOSClientConfiguration.getInstance( url );
094
095 } catch ( Exception e ) {
096 e.printStackTrace();
097 throw new ServletException( StringTools.stackTraceToString( e.getStackTrace() ) );
098 }
099
100 if ( getInitParameter( "Client.errorPage" ) != null ) {
101 ERROR_PAGE = getInitParameter( "Client.errorPage" );
102 }
103 }
104
105 @Override
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 }