Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/ThemeListingServiceImpl.java @ 3497:88feb3347aa5
Implement a ProxyServlet
Implement a ProxyServlet to be able to restrict the access to the
mapserver too. All queries to the provided map services should go throught
this new ProxyServlet. Currently the ProxyServlet can only handle HTTP GET
requests.
flys-client/trunk@5221 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Bjoern Ricks <bjoern.ricks@intevation.de> |
---|---|
date | Thu, 16 Aug 2012 14:42:36 +0000 |
parents | 37dce0f2f63b |
children |
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package de.intevation.flys.client.server; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import de.intevation.artifacts.common.utils.XMLUtils; 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.client.services.ThemeListingService; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.shared.model.Style; import java.util.HashMap; import java.util.Map; import javax.xml.xpath.XPathConstants; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; /** * This interface provides a method to list themes filtered by name. * * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> */ public class ThemeListingServiceImpl extends RemoteServiceServlet implements ThemeListingService { private static final Logger logger = Logger.getLogger(ThemeListingServiceImpl.class); private static final String XPATH_THEME_GROUPS = "/themes/themegroup"; /** The error message key that is thrown if an error occured while reading * the supported rivers from server.*/ public static final String ERROR_NO_GROUPS_FOUND = "error_no_groups_found"; public Map<String, Style> list(String locale, String name) throws ServerException { String url = getServletContext().getInitParameter("server-url"); Document doc = XMLUtils.newDocument(); XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( doc, null, null); Element e = ec.create("theme"); ec.addAttr(e, "name", name); doc.appendChild(e); HttpClient client = new HttpClientImpl(url, locale); try { Document res = client.callService(url, "themelisting", doc); NodeList themeGroups = (NodeList) XMLUtils.xpath( res, XPATH_THEME_GROUPS, XPathConstants.NODESET, null); if (themeGroups == null || themeGroups.getLength() == 0) { throw new ServerException(ERROR_NO_GROUPS_FOUND); } int count = themeGroups.getLength(); Map<String, Style> theStyles = new HashMap<String, Style>(count); for (int i = 0; i < count; i++) { Element tmp = (Element)themeGroups.item(i); String groupName = tmp.getAttribute("name"); NodeList theTheme = (NodeList) XMLUtils.xpath( tmp, "theme", XPathConstants.NODESET, null); for (int j = 0; j < theTheme.getLength(); j++) { Element elem = (Element) theTheme.item(j); theStyles.put(groupName, StyleHelper.getStyle(elem)); } } return theStyles; } catch (ConnectionException ce) { logger.error(ce, ce); } throw new ServerException(ERROR_NO_GROUPS_FOUND); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :