teichmann@5861: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5861:  * Software engineering by Intevation GmbH
teichmann@5861:  *
teichmann@5861:  * This file is Free Software under the GNU AGPL (>=v3) 
teichmann@5861:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5861:  * documentation coming with Dive4Elements River for details. 
teichmann@5861:  */
teichmann@5861: 
teichmann@5835: package org.dive4elements.river.client.server;
ingo@99: 
ingo@99: import org.w3c.dom.Document;
ingo@99: 
ingo@1367: import org.apache.log4j.Logger;
ingo@1367: 
ingo@99: import com.google.gwt.user.server.rpc.RemoteServiceServlet;
ingo@99: 
teichmann@5835: import org.dive4elements.artifacts.common.utils.ClientProtocolUtils;
ingo@99: 
teichmann@5835: import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
teichmann@5835: import org.dive4elements.artifacts.httpclient.http.HttpClient;
teichmann@5835: import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
teichmann@5835: import org.dive4elements.artifacts.httpclient.http.response.DocumentResponseHandler;
ingo@99: 
teichmann@5835: import org.dive4elements.river.client.shared.exceptions.ServerException;
teichmann@5835: import org.dive4elements.river.client.shared.model.Collection;
ingo@905: 
teichmann@5835: import org.dive4elements.river.client.client.services.DescribeCollectionService;
ingo@99: 
ingo@99: 
ingo@99: /**
ingo@99:  * This service implements a method that queries the DESCRIBE document of a
ingo@99:  * specific collection and returns a Collection object with the information of
ingo@99:  * the document.
ingo@99:  *
ingo@99:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@99:  */
ingo@99: public class DescribeCollectionServiceImpl
ingo@99: extends      RemoteServiceServlet
ingo@99: implements   DescribeCollectionService
ingo@99: {
ingo@1367:     private static final Logger logger =
ingo@1367:         Logger.getLogger(DescribeCollectionServiceImpl.class);
ingo@1367: 
ingo@1367: 
ingo@215:     /** The error message key that is thrown if an error occured while
ingo@215:      * describe() a Collection.*/
ingo@215:     public static final String ERROR_DESCRIBE_COLLECTION =
ingo@215:         "error_describe_collection";
ingo@215: 
ingo@215: 
raimund@1425:     public Collection describe(String uuid, String locale)
ingo@215:     throws ServerException
ingo@215:     {
ingo@1367:         logger.info("DescribeCollectionServiceImpl.describe");
ingo@99: 
raimund@1425:         String url  = getServletContext().getInitParameter("server-url");
raimund@1425: 
ingo@99:         Document describe = ClientProtocolUtils.newDescribeCollectionDocument(
ingo@99:             uuid);
ingo@99: 
raimund@1425:         HttpClient client = new HttpClientImpl(url, locale);
ingo@99: 
ingo@99:         try {
ingo@99:             Document response = (Document) client.doCollectionAction(
ingo@99:                 describe, uuid, new DocumentResponseHandler());
ingo@99: 
ingo@905:             Collection c = CollectionHelper.parseCollection(response);
ingo@99: 
ingo@99:             if (c == null) {
ingo@215:                 throw new ServerException(ERROR_DESCRIBE_COLLECTION);
ingo@99:             }
ingo@99: 
ingo@1367:             logger.debug("Collection successfully parsed.");
ingo@524: 
ingo@99:             return c;
ingo@99:         }
ingo@99:         catch (ConnectionException ce) {
ingo@1367:             logger.error(ce, ce);
ingo@99:         }
ingo@99: 
ingo@215:         throw new ServerException(ERROR_DESCRIBE_COLLECTION);
ingo@99:     }
ingo@99: }
ingo@99: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :