com.wlami.mibox.server.services.MetadataNotifier.java Source code

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Here is the source code for com.wlami.mibox.server.services.MetadataNotifier.java

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/**
 *     MiBox Server - folder synchronization backend
 *  Copyright (C) 2012 wladislaw
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as
 *  published by the Free Software Foundation, either version 3 of the
 *  License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.wlami.mibox.server.services;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import org.codehaus.jettison.json.JSONArray;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.wlami.mibox.server.data.User;
import com.wlami.mibox.server.util.HttpHeaderUtil;

/**
 * @author wladislaw
 * 
 */
@Path("/metadatanotifier/{datetime}")
public class MetadataNotifier {

    private EntityManager em;

    @PersistenceContext
    public void setEm(EntityManager em) {
        this.em = em;
    }

    /** internal logger */
    public static final Logger log = LoggerFactory.getLogger(MetadataNotifier.class);

    /**
     * Get an array of all metadata filenames which have been updated since the
     * specified datetime. Used for synchronization of metadata.
     * 
     * @param datetimeAsString
     *            Only names of metadata files which have been updated since
     *            this datetime will be returned.
     * @return An array of new updated metadata filenames.
     */
    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public JSONArray listUpdatedMetadataSince(@PathParam("datetime") String datetimeAsString,
            @Context HttpHeaders headers) {
        // Check whether user is properly logged in
        User user = HttpHeaderUtil.getUserFromHttpHeaders(headers, em);
        if (user == null) {
            throw new WebApplicationException(Response.status(Status.UNAUTHORIZED).build());
        }

        DateTimeFormatter dateTimeFormatter = ISODateTimeFormat.basicDateTime();
        DateTime datetime = null;
        try {
            datetime = dateTimeFormatter.parseDateTime(datetimeAsString);
        } catch (IllegalArgumentException e) {
            log.warn("listUpdatedMetadataSince: Date time format not recognized!", e.getMessage());
            throw new WebApplicationException(
                    Response.status(Status.BAD_REQUEST).entity("Could not parse date").build());
        }
        List<String> names = user.getByLastUpdatedSince(datetime, em);
        return new JSONArray(names);
    }
}