view flys-client/src/main/java/de/intevation/flys/client/server/GetArtifactServiceImpl.java @ 4187:21f4e4b79121

Refactor GaugeDischargeCurveFacet to be able to set a facet name For adding another output of the GaugeDischargeCurveArtifact it is necessary to provide to facet instances with different names. Therefore the GaugeDischargeCurveFacet is extended to set the facet name in the constructor.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 19 Oct 2012 13:25:49 +0200
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);
    }
}
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