view flys-client/src/main/java/de/intevation/flys/client/server/LoadArtifactServiceImpl.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 51ed89b754ae
children
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package de.intevation.flys.client.server;

import java.util.ArrayList;
import java.util.HashMap;

import org.apache.log4j.Logger;

import de.intevation.flys.client.shared.exceptions.ServerException;
import de.intevation.flys.client.shared.model.Artifact;
import de.intevation.flys.client.shared.model.Collection;
import de.intevation.flys.client.shared.model.Recommendation;

import de.intevation.flys.client.client.services.LoadArtifactService;

/**
 * This service creates a new Artifact based on a given Recommendation and puts
 * this new artifact into a specified Collection.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class LoadArtifactServiceImpl
extends      ArtifactServiceImpl
implements   LoadArtifactService
{
    private static final Logger logger =
        Logger.getLogger(LoadArtifactServiceImpl.class);

    /** Error. */
    public static final String ERROR_LOAD_ARTIFACT = "error_load_artifact";


    /**
     * Clones or creates a single artifact and adds it to a collection.
     *
     * Note that in contrast to loadMany, always the given factory is used
     * to clone the artifact.
     *
     * @param parent  collection to add recommendation to.
     * @param recom   recommendation to create clone for.
     * @param factory factory to use.
     * @param locale  the locale to translate messages.
     */
    public Artifact load(
        Collection     parent,
        Recommendation recom,
        String         factory,
        String         locale
    )
    throws ServerException {
        logger.info(
            "LoadArtifactServiceImpl.load: " + recom.getMasterArtifact());

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

        // 1) Clone the Artifact specified in >>recom<<
        Artifact clone = ArtifactHelper.createArtifact(
            url, locale, factory, recom);

        if (clone != null) {
            logger.debug("Successfully create Artifact Clone. Add now!");
            Collection c = CollectionHelper.addArtifact(
                parent, clone, url, locale);

            if (c != null) {
                logger.debug("Successfully added Clone to Collection.");

                return clone;
            }
        }

        throw new ServerException(ERROR_LOAD_ARTIFACT);
    }


    /**
     * Clone/create one or more artifacts and add it to a collection, avoiding
     * duplicates.
     *
     * @param parent  Collection where clones will be added to.
     * @param recoms  definitions of source of clone.
     * @param factory name of factory to use when cloning artifacts (can be
     *                null in which case the recommendations getFactory() will
     *                be used.
     * @param locale  the locale to translate messages.
     *
     * @return cloned artifacts (same artifact might be contained multiple
     *         times).
     */
    public Artifact[] loadMany(
        Collection       parent,
        Recommendation[] recoms,
        String           factory,
        String           locale
    )
    throws ServerException {
        logger.debug("LoadArtifactServiceImpl.loadMany");

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

        ArrayList<Artifact> artifacts = new ArrayList<Artifact>();
        HashMap<Recommendation, Artifact> cloneMap =
            new HashMap<Recommendation, Artifact>();

        // TODO Respect the index of what to clone.

        // 1) Clone the Artifacts specified in >>recoms<<
        for (Recommendation recom : recoms) {
            // Do not do two clones of two identical recommendations.
            Artifact prevClone = cloneMap.get(recom);
            if (prevClone != null) {
                // Already cloned a recommendation like this.
                logger.debug("LoadArtifactServiceImpl: Avoid reclones, "
                    + "clone already exists.");
                artifacts.add(prevClone);
            }
            else {
                // Not already cloned.
                String realFactory = factory != null
                    ? factory
                    : recom.getFactory();

                logger.debug("One will be cloned with : " + realFactory);

                Artifact clone = ArtifactHelper.createArtifact(
                    url, locale, realFactory, recom);

                if (clone != null) {
                    logger.debug("LoadArtifactServiceImple: Successfully "
                        + "loaded Artifact Clone.");
                    Collection c = CollectionHelper.addArtifact(
                        parent, clone, url, locale);

                    if (c != null) {
                        artifacts.add(clone);
                        // Remember we cloned a recommendation like this.
                        cloneMap.put(recom, clone);
                    }
                    else {
                        throw new ServerException(ERROR_LOAD_ARTIFACT);
                    }
                }
            }
        }
        return artifacts.toArray(new Artifact[artifacts.size()]);
    }
}
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