001 // $HeadURL: /cvsroot/deegree/src/org/deegree/ogcwebservices/wms/WMPService.java,v
002 // 1.3 2004/07/12 06:12:11 ap Exp $
003 /*---------------- FILE HEADER ------------------------------------------
004
005 This file is part of deegree.
006 Copyright (C) 2001-2008 by:
007 EXSE, Department of Geography, University of Bonn
008 http://www.giub.uni-bonn.de/deegree/
009 lat/lon GmbH
010 http://www.lat-lon.de
011
012 This library is free software; you can redistribute it and/or
013 modify it under the terms of the GNU Lesser General Public
014 License as published by the Free Software Foundation; either
015 version 2.1 of the License, or (at your option) any later version.
016
017 This library is distributed in the hope that it will be useful,
018 but WITHOUT ANY WARRANTY; without even the implied warranty of
019 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
020 Lesser General Public License for more details.
021
022 You should have received a copy of the GNU Lesser General Public
023 License along with this library; if not, write to the Free Software
024 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
025
026 Contact:
027
028 Andreas Poth
029 lat/lon GmbH
030 Aennchenstr. 19
031 53115 Bonn
032 Germany
033 E-Mail: poth@lat-lon.de
034
035 Prof. Dr. Klaus Greve
036 Department of Geography
037 University of Bonn
038 Meckenheimer Allee 166
039 53115 Bonn
040 Germany
041 E-Mail: greve@giub.uni-bonn.de
042
043
044 ---------------------------------------------------------------------------*/
045 package org.deegree.ogcwebservices.wmps;
046
047 import java.lang.reflect.Constructor;
048
049 import org.deegree.enterprise.Proxy;
050 import org.deegree.framework.log.ILogger;
051 import org.deegree.framework.log.LoggerFactory;
052 import org.deegree.framework.trigger.TriggerProvider;
053 import org.deegree.i18n.Messages;
054 import org.deegree.ogcwebservices.CurrentUpdateSequenceException;
055 import org.deegree.ogcwebservices.InvalidUpdateSequenceException;
056 import org.deegree.ogcwebservices.OGCWebService;
057 import org.deegree.ogcwebservices.OGCWebServiceException;
058 import org.deegree.ogcwebservices.OGCWebServiceRequest;
059 import org.deegree.ogcwebservices.getcapabilities.OGCCapabilities;
060 import org.deegree.ogcwebservices.wmps.configuration.WMPSConfiguration;
061 import org.deegree.ogcwebservices.wmps.configuration.WMPSDeegreeParams;
062 import org.deegree.ogcwebservices.wmps.operation.PrintMap;
063 import org.deegree.ogcwebservices.wmps.operation.WMPSGetCapabilities;
064 import org.deegree.ogcwebservices.wmps.operation.WMPSGetCapabilitiesResult;
065 import org.deegree.ogcwebservices.wmps.operation.WMPSProtocolFactory;
066
067 /**
068 * Handles saving the PrintMap request to the databank and generating the initial response to be
069 * sent to the user.
070 *
071 * @author <a href="mailto:deshmukh@lat-lon.de">Anup Deshmukh</a>
072 * @version 2.0
073 */
074 public class WMPService implements OGCWebService {
075
076 private static final ILogger LOG = LoggerFactory.getLogger( WMPService.class );
077
078 private static final TriggerProvider TP = TriggerProvider.create( WMPService.class );
079
080 private PrintMapHandler printMapHandler;
081
082 private WMPSConfiguration configuration;
083
084 /**
085 * Creates a new WMPService object.
086 *
087 * @param configuration
088 */
089 public WMPService( WMPSConfiguration configuration ) {
090 this.configuration = configuration;
091 this.printMapHandler = new PrintMapHandler( configuration );
092 Proxy proxy = this.configuration.getDeegreeParams().getProxy();
093 if ( proxy != null ) {
094 proxy.setProxy( true );
095 }
096 }
097
098 /**
099 * Return the OGCCapabilities.
100 *
101 * @return OGCCapabilities
102 */
103 public OGCCapabilities getCapabilities() {
104 return this.configuration;
105 }
106
107 /**
108 * the method performs the handling of the passed OGCWebServiceEvent directly and returns the
109 * result to the calling class/method
110 *
111 * @param request
112 * request to perform
113 * @return Object
114 * @throws OGCWebServiceException
115 */
116 public Object doService( OGCWebServiceRequest request )
117 throws OGCWebServiceException {
118
119 request = (OGCWebServiceRequest) TP.doPreTrigger( this, request )[0];
120
121 Object result = null;
122 if ( request instanceof PrintMap ) {
123
124 String template = ( (PrintMap) request ).getTemplate();
125 WMPSDeegreeParams params = this.configuration.getDeegreeParams();
126 boolean isSynchronous = params.getSynchronousTemplates().contains( template );
127
128 String handler = HandlerMapping.getString( "WMPService.PRINTMAP" );
129 RequestManager rqManager = (RequestManager) createHandler( request, PrintMap.class, handler );
130
131 try {
132 rqManager.saveRequestToDB();
133
134 result = rqManager.createInitialResponse( Messages.getMessage( "WMPS_INIT_RESPONSE" ) );
135 } catch ( OGCWebServiceException e ) {
136
137 throw new OGCWebServiceException( "Error saving the PrintMap request " + "to the DB. " + e.getMessage() );
138 }
139
140 try {
141 if ( isSynchronous ) {
142 result = this.printMapHandler.runSynchronous( (PrintMap) request );
143 } else {
144 Thread printMap = new Thread( this.printMapHandler );
145 printMap.start();
146 }
147 } catch ( Exception e ) {
148 LOG.logError( e.getMessage(), e );
149 throw new OGCWebServiceException( "Error performing the PrintMap request. " + e.getMessage() );
150 }
151 } else if ( request instanceof WMPSGetCapabilities ) {
152 result = handleGetCapabilities( (WMPSGetCapabilities) request );
153 }
154
155 return TP.doPostTrigger( this, result )[0];
156 }
157
158 /**
159 * creates a handler class for performing the incomming request. The instance that will be
160 * created depends on the responsible class the for the submitted request in the WMPS
161 * capabilities/configuration.
162 *
163 * @param request
164 * request to be performed
165 * @param requestClass
166 * of the request (GetStyles, WMSFeatureInfoRequest etc.)
167 * @param className
168 * type of the operation to perform by the handler
169 * @return Object
170 * @throws OGCWebServiceException
171 */
172 private Object createHandler( OGCWebServiceRequest request, Class requestClass, String className )
173 throws OGCWebServiceException {
174
175 // describes the signature of the required constructor
176 Class[] cl = new Class[2];
177 cl[0] = WMPSConfiguration.class;
178 cl[1] = requestClass;
179
180 // set parameter to submitt to the constructor
181 Object[] o = new Object[2];
182 o[0] = this.configuration;
183 o[1] = request;
184
185 Object handler = null;
186
187 try {
188 // get constructor
189 Class creator = Class.forName( className );
190 Constructor con = creator.getConstructor( cl );
191 // call constructor and instantiate a new DataStore
192 handler = con.newInstance( o );
193 } catch ( Exception e ) {
194 LOG.logError( e.getMessage(), e );
195 throw new OGCWebServiceException( "Couldn't instantiate " + className + '!' );
196 }
197
198 return handler;
199 }
200
201 /**
202 * reads/creates the capabilities of the WMPS.
203 *
204 * @param request
205 * capabilities request
206 * @return WMPSGetCapabilitiesResult
207 * @throws CurrentUpdateSequenceException
208 * @throws InvalidUpdateSequenceException
209 */
210 private WMPSGetCapabilitiesResult handleGetCapabilities( WMPSGetCapabilities request )
211 throws CurrentUpdateSequenceException, InvalidUpdateSequenceException {
212
213 String rUp = request.getUpdateSequence();
214 String cUp = this.configuration.getUpdateSequence();
215
216 if ( ( rUp != null ) && ( cUp != null ) && ( rUp.compareTo( cUp ) == 0 ) ) {
217 throw new CurrentUpdateSequenceException( "request update sequence: " + rUp + "is equal to capabilities"
218 + " update sequence " + cUp );
219 }
220
221 if ( ( rUp != null ) && ( cUp != null ) && ( rUp.compareTo( cUp ) > 0 ) ) {
222 throw new InvalidUpdateSequenceException( "request update sequence: " + rUp + " is higher then the "
223 + "capabilities update sequence " + cUp );
224 }
225 return WMPSProtocolFactory.createGetCapabilitiesResult( request, null, this.configuration );
226 }
227
228 }