Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/GetArtifactServiceImpl.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 |
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package de.intevation.flys.client.server; import org.w3c.dom.Document; import org.apache.log4j.Logger; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.ClientProtocolUtils; 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.artifacts.httpclient.http.response.DocumentResponseHandler; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.shared.model.Artifact; import de.intevation.flys.client.client.services.GetArtifactService; /** * This service provides a method that returns an artifact based on its * identifier. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class GetArtifactServiceImpl extends RemoteServiceServlet implements GetArtifactService { private static final Logger logger = Logger.getLogger(GetArtifactServiceImpl.class); public static final String ERROR_DESCRIBE_ARTIFACT = "error_describe_artifact"; public static final String XPATH_RESULT = "/art:result/text()"; public static final String OPERATION_FAILURE = "FAILED"; public Artifact getArtifact( String locale, String uuid, String hash) throws ServerException { logger.info("GetArtifactServiceImpl.getArtifact"); String url = getServletContext().getInitParameter("server-url"); Document describe = ClientProtocolUtils.newDescribeDocument( uuid, hash, true); HttpClient client = new HttpClientImpl(url, locale); try { Document description = (Document) client.describe( new de.intevation.artifacts.httpclient.objects.Artifact( uuid, hash), describe, new DocumentResponseHandler()); if (description == null) { throw new ServerException(ERROR_DESCRIBE_ARTIFACT); } String result = XMLUtils.xpathString( description, XPATH_RESULT, ArtifactNamespaceContext.INSTANCE); if (result == null || !result.equals(OPERATION_FAILURE)) { return (Artifact) new FLYSArtifactCreator().create(description); } } catch (ConnectionException ce) { logger.error(ce, ce); } throw new ServerException(ERROR_DESCRIBE_ARTIFACT); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :