Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java @ 4421:0b0f415203f0
Add new Filter class to change caching
Add new Filter class to avoid caching of GWT nocache files in browsers and http
proxies. The new Filter class NoCacheFilter sets http headers to stop the
proxies and browesers from storing the nocache files.
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Tue, 06 Nov 2012 13:32:06 +0100 |
parents | bc06a671ef60 |
children | 02cf2b1dff84 |
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package de.intevation.flys.client.server; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.apache.log4j.Logger; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; import de.intevation.artifacts.httpclient.exceptions.ConnectionException; import de.intevation.artifacts.httpclient.http.HttpClient; import de.intevation.artifacts.httpclient.http.HttpClientImpl; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.shared.model.BBox; import de.intevation.flys.client.shared.model.MapInfo; import de.intevation.flys.client.client.services.MapInfoService; /** * This service fetches a document that contains meta information for a specific * chart. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class MapInfoServiceImpl extends RemoteServiceServlet implements MapInfoService { private static final Logger logger = Logger.getLogger(MapInfoServiceImpl.class); public static final String XPATH_RIVER = "/mapinfo/river/@name"; public static final String XPATH_SRID = "/mapinfo/river/srid/@value"; public static final String XPATH_BBOX = "/mapinfo/river/bbox/@value"; public static final String XPATH_RIVER_WMS = "/mapinfo/river/river-wms/@url"; public static final String XPATH_WMS_URL = "/mapinfo/river/background-wms/@url"; public static final String XPATH_WMS_LAYERS = "/mapinfo/river/background-wms/@layers"; public static final String ERROR_NO_MAPINFO_FOUND = "mapinfo_service_no_result"; public MapInfo getMapInfo(String locale, String river) throws ServerException { logger.info("MapInfoServiceImpl.getMapInfo"); String url = getServletContext().getInitParameter("server-url"); Document request = getRequestDocument(river);; HttpClient client = new HttpClientImpl(url, locale); try { logger.debug("MapInfoServiceImpl.callService"); Document result = client.callService(url, "mapinfo", request); if (result == null) { logger.warn("MapInfo service returned no result."); throw new ServerException(ERROR_NO_MAPINFO_FOUND); } return getMapInfo(result); } catch (ConnectionException ce) { logger.error(ce, ce); } throw new ServerException(ERROR_NO_MAPINFO_FOUND); } public static Document getRequestDocument(String rivername) { logger.debug("MapInfoServiceImpl.getRequestDocument"); Document request = XMLUtils.newDocument(); ElementCreator cr = new ElementCreator(request, null, null); Element root = cr.create("mapinfo"); Element river = cr.create("river"); river.setTextContent(rivername); request.appendChild(root); root.appendChild(river); return request; } public static MapInfo getMapInfo(Document result) { logger.debug("MapInfoServiceImpl.getMapInfo"); String river = XMLUtils.xpathString(result, XPATH_RIVER, null); String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null); String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null); BBox bbox = BBox.getBBoxFromString(bboxS); String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null); String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null); String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null); int srid = 4326; try { srid = Integer.parseInt(sridStr); } catch (NumberFormatException nfe) { // do nothing } return new MapInfo(river, srid, bbox, riverWMS, wmsURL, wmsLayers); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :