Metacat

/**

 *  '$RCSfile$'

 *    Purpose: A class which creates a instance of an IndexEventLog.

 *    Copyright: 2013 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Leinfelder

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.index.event;

import java.io.File;

import java.io.IOException;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import org.apache.commons.io.FileUtils;

import org.dataone.configuration.Settings;

import org.dataone.service.types.v1.Event;

import org.dataone.service.types.v1.Identifier;

import edu.ucsb.nceas.metacat.common.index.event.IndexEvent;

import edu.ucsb.nceas.metacat.index.DistributedMapsFactory;

/**

 * @author leinfelder

 *

 */

public class HazelcastIndexEventLog implements IndexEventLog {

    private static final String LASTPROCESSEDDATEFILENAME = "solr-last-proccessed-date";

    private File lastProcessedDateFile = null;

    private SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ");

    /**

     * Constructor

     * @throws IOException

     */

    public HazelcastIndexEventLog() throws IOException {

        String path = Settings.getConfiguration().getString("solr.homeDir");

        if(path == null || path.trim().equals("")) {

            path = System.getProperty("user.home");

        }

        File pathDir = new File(path);

        lastProcessedDateFile = new File(pathDir, LASTPROCESSEDDATEFILENAME);

        if(!lastProcessedDateFile.exists()) {

            lastProcessedDateFile.createNewFile();

        }

    }

	/* (non-Javadoc)

	 * @see edu.ucsb.nceas.metacat.index.event.IndexEventLog#write(edu.ucsb.nceas.metacat.index.event.IndexEvent)

	 */

	@Override

	public void write(IndexEvent event) throws IndexEventLogException {

		// write to the map

		try {

			DistributedMapsFactory.getIndexEventMap().put(event.getIdentifier(), event);

		} catch (Exception e) {

			throw new IndexEventLogException("Could not write to event map", e);

		}

	}

	/* (non-Javadoc)

	 * @see edu.ucsb.nceas.metacat.index.event.IndexEventLog#remove(java.lang.String)

	 */

	@Override

	public void remove(Identifier identifier) throws IndexEventLogException {

		// remove from the map

		try {

			DistributedMapsFactory.getIndexEventMap().remove(identifier);

		} catch (Exception e) {

			throw new IndexEventLogException("Could not remove from event map", e);

		}

	}

	/* (non-Javadoc)

	 * @see edu.ucsb.nceas.metacat.index.event.IndexEventLog#getEvents(int, org.dataone.service.types.v1.Identifier, java.util.Date, java.util.Date)

	 */

	@Override

	public List<IndexEvent> getEvents(Event action, Identifier pid, Date start, Date end) throws IndexEventLogException {

		try {

			// TODO: query the map using the parameters

			return new ArrayList<IndexEvent>(DistributedMapsFactory.getIndexEventMap().values());

		} catch (Exception e) {

			throw new IndexEventLogException("Could not remove from event map", e);

		}

	}

	/* (non-Javadoc)

	 * @see edu.ucsb.nceas.metacat.index.event.IndexEventLog#getLastProcessDate()

	 */

	@Override

	public Date getLastProcessDate() throws IndexEventLogException {

	    Date date = null;

        try {

            String dateStr = FileUtils.readFileToString(lastProcessedDateFile, "UTF-8");

            if(dateStr != null && !dateStr.trim().equals("")) {

                date = format.parse(dateStr);

            }

        } catch (IOException e) {

            throw new IndexEventLogException("HazelcastIndexEventLog.getLastProcessedDate - couldn't read the last processed date :", e);

        } catch (ParseException e) {

            // TODO Auto-generated catch block

            throw new IndexEventLogException("HazelcastIndexEventLog.getLastProcessedDate - couldn't read the last processed date since the content of file is not date :", e);

        }

        return date;

	}

	/* (non-Javadoc)

	 * @see edu.ucsb.nceas.metacat.index.event.IndexEventLog#setLastProcessDate(java.util.Date)

	 */

	@Override

	public void setLastProcessDate(Date date) throws IndexEventLogException {

	    String dateStr = format.format(date);

        try {

            FileUtils.writeStringToFile(lastProcessedDateFile, dateStr, "UTF-8");

        } catch (IOException e) {

            // TODO Auto-generated catch block

           throw new IndexEventLogException("HazelcastIndexEventLog.setLastProcessedDate - couldn't set the last processed date :", e);

        }

	}

}