view flys-client/src/main/java/de/intevation/flys/client/server/AdvanceServiceImpl.java @ 4241:49cb65d5932d

Improved the historical discharge calculation. The calculation now creates new HistoricalWQKms (new subclass of WQKms). Those WQKms are used to create new facets from (new) type 'HistoricalDischargeCurveFacet'. The chart generator is improved to support those facets.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 24 Oct 2012 14:34:35 +0200
parents f2039d030b5e
children
line wrap: on
line source
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.AdvanceService;


/**
 * This interface provides artifact specific operation ADVANCE.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class AdvanceServiceImpl
extends      RemoteServiceServlet
implements   AdvanceService
{
    private static final Logger logger = Logger.getLogger(AdvanceService.class);

    public static final String XPATH_RESULT = "/art:result/text()";

    public static final String OPERATION_FAILURE = "FAILED";

    public static final String ERROR_ADVANCE_ARTIFACT = "error_advance_artifact";


    public Artifact advance(
        String   locale,
        Artifact artifact,
        String   target)
    throws ServerException
    {
        logger.info("AdvanceServiceImpl.advance");

        String url = getServletContext().getInitParameter("server-url");

        Document advance = ClientProtocolUtils.newAdvanceDocument(
            artifact.getUuid(),
            artifact.getHash(),
            target);

        HttpClient client = new HttpClientImpl(url, locale);

        try {
            Document description = (Document) client.advance(
                new de.intevation.artifacts.httpclient.objects.Artifact(
                    artifact.getUuid(),
                    artifact.getHash()),
                advance,
                new DocumentResponseHandler());

            if (description == null) {
                throw new ServerException(ERROR_ADVANCE_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_ADVANCE_ARTIFACT);
    }
}
// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

http://dive4elements.wald.intevation.org