view flys-client/src/main/java/de/intevation/flys/client/server/CreateCollectionServiceImpl.java @ 4798:39885bdfc6fc

Added calculation of the "Umhuellende" to calculation of "W fuer ungleichwertige Abfluesse". This is done by figuring out the WST columns that imfold the data and then do simple "gleichwertige" calculations from the start of the interval. This is too much because only the Qs are needed for the "Umhuellende".
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 13 Jan 2013 16:18:28 +0100
parents 9cff19a02743
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.Collection;
import de.intevation.flys.client.shared.model.DefaultCollection;
import de.intevation.flys.client.client.services.CreateCollectionService;


/**
 * This interface provides the createCollection service to create new
 * collections in the artifact server.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class CreateCollectionServiceImpl
extends      RemoteServiceServlet
implements   CreateCollectionService
{
    /** Private logger. */
    private static final Logger logger =
        Logger.getLogger(CreateCollectionServiceImpl.class);

    /** XPath to figure out the uuid of the created collection.*/
    public static final String XPATH_COLLECTION_UUID =
        "/art:result/art:artifact-collection/@art:uuid";

    /** XPath to figure out the ttl of the created collection.*/
    public static final String XPATH_COLLECTION_TTL =
        "/art:result/art:artifact-collection/@art:ttl";

    /** Error message key that is thrown if an error occured while creating
     *  a new collection.*/
    public static final String ERROR_CREATE_COLLECTION =
        "error_create_collection";


    /** Attempt creation of Collection. */
    public Collection create(String locale, String ownerId)
    throws ServerException
    {
        logger.info("Start creating a new collection.");

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

        Document create  =
            ClientProtocolUtils.newCreateCollectionDocument(null);
        HttpClient client = new HttpClientImpl(url, locale);

        try {
            Document doc = (Document) client.createCollection(
                create, ownerId, new DocumentResponseHandler());

            String uuid = XMLUtils.xpathString(
                doc, XPATH_COLLECTION_UUID, ArtifactNamespaceContext.INSTANCE);

            String ttlStr = XMLUtils.xpathString(
                doc, XPATH_COLLECTION_TTL, ArtifactNamespaceContext.INSTANCE);

            if (uuid.trim().length() == 0 || ttlStr.length() == 0) {
                throw new ServerException(ERROR_CREATE_COLLECTION);
            }

            return new DefaultCollection(uuid, Long.valueOf(ttlStr), uuid);
        }
        catch (ConnectionException ce) {
            logger.error(ce, ce);
        }

        throw new ServerException(ERROR_CREATE_COLLECTION);
    }
}
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