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1
/**
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 *  Copyright: 2013 Regents of the University of California and the
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 *             National Center for Ecological Analysis and Synthesis
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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package edu.ucsb.nceas.metacat.index;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.text.SimpleDateFormat;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Collections;
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import java.util.Date;
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import java.util.List;
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import java.util.TimerTask;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.xpath.XPathExpressionException;
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import org.apache.commons.io.FileUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.solr.client.solrj.SolrServerException;
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import org.dataone.configuration.Settings;
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import org.dataone.service.exceptions.InvalidRequest;
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import org.dataone.service.exceptions.InvalidToken;
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import org.dataone.service.exceptions.NotAuthorized;
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import org.dataone.service.exceptions.NotFound;
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import org.dataone.service.exceptions.NotImplemented;
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import org.dataone.service.exceptions.ServiceFailure;
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import org.dataone.service.exceptions.UnsupportedType;
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import org.dataone.service.types.v1.Event;
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import org.dataone.service.types.v1.Identifier;
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import org.dataone.service.types.v1.ObjectFormatIdentifier;
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import org.dataone.service.types.v1.SystemMetadata;
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import org.dspace.foresite.OREParserException;
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import org.xml.sax.SAXException;
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import com.hazelcast.core.IMap;
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import com.hazelcast.core.ISet;
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import edu.ucsb.nceas.metacat.common.SolrServerFactory;
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import edu.ucsb.nceas.metacat.common.index.event.IndexEvent;
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import edu.ucsb.nceas.metacat.index.event.EventlogFactory;
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import edu.ucsb.nceas.metacat.index.event.IndexEventLogException;
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/**
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 * A class represents the object to generate massive solr indexes.
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 * This can happen during an update of Metacat (generating index for all existing documents)
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 * or regenerate index for those documents
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 * failing to build index during the insert or update.
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 * 
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 * @author tao
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 *
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 */
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public class IndexGenerator extends TimerTask {
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    private static final int FIRST =0;
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    private static final int SECOND =1;
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    private static final int THIRD = 2;
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    private static final int FOURTH = 3;
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    public static final int WAITTIME = 10000;
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    public static final int MAXWAITNUMBER = 180;
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    private static final String HTTP = "http://";
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    private static final String MNAPPENDIX = "/d1/mn";
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    private static final String RESOURCEMAPPROPERYNAME = "index.resourcemap.namespace";
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    public static final String WAITIMEPOPERTYNAME = "index.regenerate.start.waitingtime";
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    public static final String MAXATTEMPTSPROPERTYNAME = "index.regenerate.start.maxattempts";
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    private SolrIndex solrIndex = null;
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    //private SystemMetadataEventListener systemMetadataListener = null;
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    private IMap<Identifier, SystemMetadata> systemMetadataMap;
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    private IMap<Identifier, String> objectPathMap;
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    private ISet<SystemMetadata> indexQueue;
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    private Log log = LogFactory.getLog(IndexGenerator.class);
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    //private MNode mNode = null;
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    private static List<String> resourceMapNamespaces = null;
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    /**
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     * Constructor
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     * @param solrIndex
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     * @param systemMetadataListener
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     */
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    public IndexGenerator(SolrIndex solrIndex) {
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        this.solrIndex = solrIndex;
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        resourceMapNamespaces = Settings.getConfiguration().getList(RESOURCEMAPPROPERYNAME);
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        //this.systemMetadataListener = systemMetadataListener;
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        //this.mNode = new MNode(buildMNBaseURL());
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    }
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    /**
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     * Build the index for all documents.
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     * @throws SolrServerException 
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     * @throws ServiceFailure 
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     * @throws NotImplemented 
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     * @throws NotAuthorized 
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     * @throws InvalidToken 
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     * @throws InvalidRequest 
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     * @throws IndexEventLogException 
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     * @throws IllegalAccessException 
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     * @throws InstantiationException 
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     * @throws ClassNotFoundException 
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     * @throws ParserConfigurationException 
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     * @throws SAXException 
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     * @throws IOException 
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     * @throws UnsupportedType 
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     * @throws NotFound 
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     * @throws XPathExpressionException 
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     * @throws OREParserException 
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     */
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    public void indexAll() throws InvalidRequest, InvalidToken,
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                NotAuthorized, NotImplemented, ServiceFailure, SolrServerException, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException, XPathExpressionException, NotFound, UnsupportedType, IOException, SAXException, ParserConfigurationException, OREParserException {
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        Date since = null;
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        Date until = null;
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        index(since, until);
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    }
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    /**
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     * Build the index for the docs which have been modified since the specified date.
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     * @param since
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     * @throws SolrServerException 
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     * @throws ServiceFailure 
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     * @throws NotImplemented 
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     * @throws NotAuthorized 
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     * @throws InvalidToken 
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     * @throws InvalidRequest 
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     * @throws IndexEventLogException 
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     * @throws IllegalAccessException 
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     * @throws InstantiationException 
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     * @throws ClassNotFoundException 
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     * @throws ParserConfigurationException 
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     * @throws SAXException 
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     * @throws IOException 
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     * @throws UnsupportedType 
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     * @throws NotFound 
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     * @throws XPathExpressionException 
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     * @throws OREParserException 
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     */
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    public void index(Date since) throws InvalidRequest, InvalidToken, 
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                    NotAuthorized, NotImplemented, ServiceFailure, SolrServerException, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException, XPathExpressionException, NotFound, UnsupportedType, IOException, SAXException, ParserConfigurationException, OREParserException {
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        Date until = null;
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        index(since, until);
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    }
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    /**
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     *  Build the index for the docs which have been modified between the specified date.s
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     * @param since
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     * @param until
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     * @throws SolrServerException 
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     * @throws ServiceFailure 
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     * @throws NotImplemented 
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     * @throws NotAuthorized 
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     * @throws InvalidToken 
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     * @throws InvalidRequest 
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     * @throws IndexEventLogException 
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     * @throws IllegalAccessException 
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     * @throws InstantiationException 
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     * @throws ClassNotFoundException 
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     * @throws ParserConfigurationException 
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     * @throws SAXException 
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     * @throws IOException 
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     * @throws UnsupportedType 
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     * @throws NotFound 
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     * @throws XPathExpressionException 
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     * @throws OREParserException 
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     */
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    public void index(Date since, Date until) throws SolrServerException, InvalidRequest, 
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                                                InvalidToken, NotAuthorized, NotImplemented, ServiceFailure, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException, XPathExpressionException, NotFound, UnsupportedType, IOException, SAXException, ParserConfigurationException, OREParserException {
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        Date processedDate = null;
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        List<String> solrIds = null;
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        initSystemMetadataMap();
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        initObjectPathMap();
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        initIndexQueue();
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        List[] metacatIds = getMetacatIds(since, until);
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        List<String> otherMetacatIds = metacatIds[FIRST];
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        List<String> resourceMapIds =  metacatIds[SECOND];
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        //List<String> otherDeletedMetacatIds = metacatIds[THIRD];
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        //List<String> resourceMapDeletedIds = metacatIds[FOURTH];
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        //figure out the procesedDate by comparing the last element of otherMetacatIds and resourceMapIds.
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        List<Long> maxCollection = new ArrayList<Long>();
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        Date latestOtherId = null;
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        if (otherMetacatIds != null && !otherMetacatIds.isEmpty()) {
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            int size = otherMetacatIds.size();
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            String id = otherMetacatIds.get(size-1);
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            SystemMetadata sysmeta = getSystemMetadata(id);
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            latestOtherId = sysmeta.getDateSysMetadataModified();
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            maxCollection.add(new Long(latestOtherId.getTime()));
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        }
212
        
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        /*Date latestDeletedOtherIds = null;
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        if (otherDeletedMetacatIds != null && !otherDeletedMetacatIds.isEmpty()) {
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            int size = otherDeletedMetacatIds.size();
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            String id = otherDeletedMetacatIds.get(size-1);
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            SystemMetadata sysmeta = getSystemMetadata(id);
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            latestDeletedOtherIds = sysmeta.getDateSysMetadataModified();
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            maxCollection.add(new Long(latestDeletedOtherIds.getTime()));
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        }*/
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        Date latestResourceId = null;
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        if (resourceMapIds != null && !resourceMapIds.isEmpty()) {
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            int size = resourceMapIds.size();
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            String id = resourceMapIds.get(size-1);
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            SystemMetadata sysmeta = getSystemMetadata(id);
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            latestResourceId = sysmeta.getDateSysMetadataModified();
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            maxCollection.add(new Long(latestResourceId.getTime()));
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        }
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        /*Date latestDeletedResourceId = null;
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        if(resourceMapDeletedIds != null && !resourceMapDeletedIds.isEmpty()) {
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            int size = resourceMapDeletedIds.size();
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            String id = resourceMapDeletedIds.get(size-1);
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            SystemMetadata sysmeta = getSystemMetadata(id);
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            latestDeletedResourceId = sysmeta.getDateSysMetadataModified();
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            maxCollection.add(new Long(latestDeletedResourceId.getTime()));
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        }*/
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        if(!maxCollection.isEmpty()) {
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            Long max = Collections.max(maxCollection);
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            processedDate = new Date(max.longValue());
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        }
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        /*if(latestOtherId != null && latestResourceId != null && latestOtherId.getTime() > latestResourceId.getTime()) {
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            processedDate = latestOtherId;
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        } else if (latestOtherId != null && latestResourceId != null && latestOtherId.getTime()  <= latestResourceId.getTime()) {
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            processedDate = latestResourceId;
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        } else if (latestOtherId == null && latestResourceId != null) {
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            processedDate = latestResourceId;
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        } else if (latestOtherId != null && latestResourceId == null) {
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            processedDate = latestOtherId;
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        }*/
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        //add the failedPids 
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        List<IndexEvent> failedEvents = EventlogFactory.createIndexEventLog().getEvents(null, null, null, null);
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        List<String> failedOtherIds = new ArrayList<String>();
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        List<String> failedResourceMapIds = new ArrayList<String>();
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        if(failedEvents != null) {
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            for(IndexEvent event : failedEvents) {
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            	String id = event.getIdentifier().getValue();
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                SystemMetadata sysmeta = getSystemMetadata(id);
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                if(sysmeta != null) {
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                    ObjectFormatIdentifier formatId =sysmeta.getFormatId();
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                    if(formatId != null && formatId.getValue() != null && resourceMapNamespaces != null && isResourceMap(formatId)) {
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                        failedResourceMapIds.add(id);
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                    } else {
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                        failedOtherIds.add(id);
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                    }
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                }
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            }
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        }
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        //indexFailedIds(failedOtherIds);
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        //indexFailedIds(failedResourceMapIds);
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        index(failedOtherIds);
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        index(failedResourceMapIds);
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        /*if(!failedOtherIds.isEmpty()) {
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            failedOtherIds.addAll(otherMetacatIds);
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        } else {
282
            failedOtherIds = otherMetacatIds;
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        }
284
        
285
        if(!failedResourceMapIds.isEmpty()) {
286
            failedResourceMapIds.addAll(resourceMapIds);
287
        } else {
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            failedResourceMapIds = resourceMapIds;
289
        }*/
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        //log.info("the ids in index_event for reindex ( except the resourcemap)=====================================\n "+failedOtherIds);
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        //log.info("the resourcemap ids in index_event for reindex =====================================\n "+failedResourceMapIds);
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        log.info("the metacat ids (except the resource map ids)-----------------------------"+otherMetacatIds);
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        //logFile(otherMetacatIds, "ids-for-timed-indexing-log");
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        //log.info("the deleted metacat ids (except the resource map ids)-----------------------------"+otherDeletedMetacatIds);
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        log.info("the metacat resroucemap ids -----------------------------"+resourceMapIds);
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        //logFile(resourceMapIds, "ids-for-timed-indexing-log");
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        //log.info("the deleted metacat resroucemap ids -----------------------------"+resourceMapDeletedIds);
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        index(otherMetacatIds);
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        //removeIndex(otherDeletedMetacatIds);
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        index(resourceMapIds);
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        //removeIndex(resourceMapDeletedIds);
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        //record the timed index.
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        if(processedDate != null) {
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            EventlogFactory.createIndexEventLog().setLastProcessDate(processedDate);
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        }
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    }
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    /*
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     * Write the docids which will be indexed into a file. 
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     */
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    /*private void logFile(List<String> ids, String fileName)  {
314
        if(ids != null) {
315
            try {
316
                String tempDir = System.getProperty("java.io.tmpdir");
317
                log.info("the temp dir is ===================== "+tempDir);
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                File idsForIndex = new File(tempDir, fileName);
319
                if(!idsForIndex.exists()) {
320
                    idsForIndex.createNewFile();
321
                } 
322
                
323
                Date date = Calendar.getInstance().getTime();
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                SimpleDateFormat format = new SimpleDateFormat("yyyy.MM.dd G 'at' HH:mm:ss z");
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                String dateStr = format.format(date);
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                List<String> dateList = new ArrayList<String>();
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                dateList.add(dateStr);
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                Boolean append = true;
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                FileUtils.writeLines(idsForIndex, dateList, append);//write time string
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                FileUtils.writeLines(idsForIndex, ids, append);
331
            } catch (Exception e) {
332
                log.warn("IndexGenerator.logFile - Couldn't log the ids which will be indexed since - "+e.getMessage());
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            }
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335
        }
336
    }*/
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    /*
338
     * Doing index
339
     */
340
    private void index(List<String> metacatIds) {
341
        if(metacatIds != null) {
342
            for(String metacatId : metacatIds) {
343
                if(metacatId != null) {
344
                     generateIndex(metacatId);
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                }
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            }
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        }
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    }
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    /*
351
     * Index those ids which failed in the process (We got them from the EventLog)
352
     */
353
    /*private void indexFailedIds(List<IndexEvent> events) {
354
        if(events != null) {
355
            for(IndexEvent event : events) {
356
                if(event != null) {
357
                    Identifier identifier = event.getIdentifier();
358
                    if(identifier != null) {
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                        String id = identifier.getValue();
360
                        if(id != null) {
361
                            Event action = event.getAction();
362
                            //if (action != null && action.equals(Event.CREATE)) {
363
                                try {
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                                    generateIndex(id);
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                                    EventlogFactory.createIndexEventLog().remove(identifier);
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                                } catch (Exception e) {
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                                    log.error("IndexGenerator.indexFailedIds - Metacat Index couldn't generate the index for the id - "+id+" because "+e.getMessage());
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                                }
369
                            
370
                        }
371
                    }
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                }
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            }
374
        }
375
    }*/
376
    
377
    public void run() {
378
    
379
        try {
380
            Date since = EventlogFactory.createIndexEventLog().getLastProcessDate();
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            index(since);
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        } catch (InvalidRequest e) {
383
            // TODO Auto-generated catch block
384
            //e.printStackTrace();
385
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
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        } catch (InvalidToken e) {
387
            // TODO Auto-generated catch block
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            //e.printStackTrace();
389
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
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        } catch (NotAuthorized e) {
391
            // TODO Auto-generated catch block
392
            //e.printStackTrace();
393
        } catch (NotImplemented e) {
394
            // TODO Auto-generated catch block
395
            //e.printStackTrace();
396
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
397
        } catch (ServiceFailure e) {
398
            // TODO Auto-generated catch block
399
            //e.printStackTrace();
400
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
401
        } catch (SolrServerException e) {
402
            // TODO Auto-generated catch block
403
            //e.printStackTrace();
404
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
405
        } catch (FileNotFoundException e) {
406
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
407
        } catch (ClassNotFoundException e) {
408
            // TODO Auto-generated catch block
409
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
410
        } catch (InstantiationException e) {
411
            // TODO Auto-generated catch block
412
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
413
        } catch (IllegalAccessException e) {
414
            // TODO Auto-generated catch block
415
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
416
        } catch (IndexEventLogException e) {
417
            // TODO Auto-generated catch block
418
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
419
        } catch (XPathExpressionException e) {
420
            // TODO Auto-generated catch block
421
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
422
        } catch (NotFound e) {
423
            // TODO Auto-generated catch block
424
            e.printStackTrace();
425
        } catch (UnsupportedType e) {
426
            // TODO Auto-generated catch block
427
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
428
        } catch (IOException e) {
429
            // TODO Auto-generated catch block
430
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
431
        } catch (SAXException e) {
432
            // TODO Auto-generated catch block
433
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
434
        } catch (ParserConfigurationException e) {
435
            // TODO Auto-generated catch block
436
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
437
        } catch (OREParserException e) {
438
            // TODO Auto-generated catch block
439
            log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
440
        }
441
    }
442
    
443
   
444
    
445
    /*
446
     * Get an array of the list of ids of the metacat which has the systemmetadata modification in the range.
447
     * 
448
     * If since and util are null, it will return all of them.
449
     * The first element of the list is the ids except the resource map. The second elements of the list is the ids of the resource map.
450
     * The reason to split them is when we index the resource map, we need the index of the documents in the resource map ready.
451
     * The last element in the each list has the latest SystemMetadata modification date. But they are not sorted.
452
     */
453
    private List[] getMetacatIds(Date since, Date until) throws InvalidRequest, 
454
                        InvalidToken, NotAuthorized, NotImplemented, ServiceFailure, FileNotFoundException {
455
        String fileName = "ids-from-hazelcast";
456
        List<String> resourceMapIds = new ArrayList();
457
        //List<String> resourceMapDeletedIds = new ArrayList();
458
        List<String> otherIds = new ArrayList();
459
        //List<String> otherDeletedIds = new ArrayList();
460
        List[] ids = new List[2];
461
        ids[FIRST]= otherIds;
462
        ids[SECOND] = resourceMapIds;
463
        //ids[THIRD]  = otherDeletedIds;
464
        //ids[FOURTH] = resourceMapDeletedIds;
465
        ISet<Identifier> metacatIds = DistributedMapsFactory.getIdentifiersSet();
466
        Date otherPreviousDate = null;
467
        Date otherDeletedPreviousDate = null;
468
        Date resourceMapPreviousDate = null;
469
        Date resourceMapDeletedPreviousDate = null;
470
        if(metacatIds != null) {
471
            for(Identifier identifier : metacatIds) {
472
                if(identifier != null && identifier.getValue() != null && !identifier.getValue().equals("")) {
473
                    List<String> idLog = new ArrayList<String>();
474
                    idLog.add(identifier.getValue());
475
                    //logFile(idLog, fileName);
476
                    SystemMetadata sysmeta = getSystemMetadata(identifier.getValue());
477
                    if(sysmeta != null) {
478
                        ObjectFormatIdentifier formatId =sysmeta.getFormatId();
479
                        //System.out.println("the object format id is "+formatId.getValue());
480
                        //System.out.println("the ============ resourcMapNamespaces"+resourceMapNamespaces);
481
                        boolean correctTimeRange = false;
482
                        Date sysDate = sysmeta.getDateSysMetadataModified();
483
                        if(since == null && until == null) {
484
                            correctTimeRange = true;
485
                        } else if (since != null && until == null) {
486
                            if(sysDate.getTime() > since.getTime()) {
487
                                correctTimeRange = true;
488
                            }
489
                        } else if (since == null && until != null) {
490
                            if(sysDate.getTime() < until.getTime()) {
491
                                correctTimeRange = true;
492
                            }
493
                        } else if (since != null && until != null) {
494
                            if(sysDate.getTime() > since.getTime() && sysDate.getTime() < until.getTime()) {
495
                                correctTimeRange = true;
496
                            }
497
                        }
498
                        if(correctTimeRange && formatId != null && formatId.getValue() != null && resourceMapNamespaces != null && isResourceMap(formatId)) {
499
                            //for the resource map
500
                            /*if(sysmeta.getArchived() || sysmeta.getObsoletedBy() != null) {
501
                                //archived ids
502
                                if(!resourceMapDeletedIds.isEmpty()) {
503
                                    if(sysDate.getTime() > resourceMapDeletedPreviousDate.getTime()) {
504
                                        resourceMapDeletedIds.add(identifier.getValue());//append to the end of the list if current is later than the previous one
505
                                        resourceMapDeletedPreviousDate = sysDate;//reset resourceMapPreviousDate to the bigger one
506
                                    } else {
507
                                        int size = resourceMapDeletedIds.size();//
508
                                        resourceMapDeletedIds.add(size -1, identifier.getValue());//keep the previous one at the end of the list.
509
                                    }
510
                                } else {
511
                                    resourceMapDeletedIds.add(identifier.getValue());
512
                                    resourceMapDeletedPreviousDate = sysDate;//init resourcemapPreviousDate
513
                                }
514
                            } else {*/
515
                                // for all ids
516
                                if(!resourceMapIds.isEmpty()) {
517
                                    if(sysDate.getTime() > resourceMapPreviousDate.getTime()) {
518
                                        resourceMapIds.add(identifier.getValue());//append to the end of the list if current is later than the previous one
519
                                        resourceMapPreviousDate = sysDate;//reset resourceMapPreviousDate to the bigger one
520
                                    } else {
521
                                        int size = resourceMapIds.size();//
522
                                        resourceMapIds.add(size -1, identifier.getValue());//keep the previous one at the end of the list.
523
                                    }
524
                                } else {
525
                                    resourceMapIds.add(identifier.getValue());
526
                                    resourceMapPreviousDate = sysDate;//init resourcemapPreviousDate
527
                                }
528
                            //}
529
                        } else if (correctTimeRange) {
530
                            /*if(sysmeta.getArchived() || sysmeta.getObsoletedBy() != null) {
531
                                //for the archived ids
532
                                if(!otherDeletedIds.isEmpty()) {
533
                                    if(sysDate.getTime() > otherDeletedPreviousDate.getTime()) {
534
                                        otherDeletedIds.add(identifier.getValue());
535
                                        otherDeletedPreviousDate = sysDate;//reset otherDeletedPreviousDate to the bigger one
536
                                    } else {
537
                                        int size = otherDeletedIds.size();
538
                                        otherDeletedIds.add(size-1, identifier.getValue());
539
                                    }
540
                                } else {
541
                                    otherDeletedIds.add(identifier.getValue());
542
                                    otherDeletedPreviousDate = sysDate;//init otherDeletedPreviousDate
543
                                }
544
                            } else {*/
545
                                //for all ids
546
                                if(!otherIds.isEmpty()) {
547
                                    if(sysDate.getTime() > otherPreviousDate.getTime()) {
548
                                        otherIds.add(identifier.getValue());
549
                                        otherPreviousDate = sysDate;//reset otherPreviousDate to the bigger one
550
                                    } else {
551
                                        int size = otherIds.size();
552
                                        otherIds.add(size-1, identifier.getValue());
553
                                    }
554
                                } else {
555
                                    otherIds.add(identifier.getValue());
556
                                    otherPreviousDate = sysDate;//init otherPreviousDate
557
                                }
558
                            //}
559
                        }
560
                        
561
                    }
562
                }
563
            }
564
        }
565
        return ids;
566
    }
567
    
568
    /*
569
     * If the specified ObjectFormatIdentifier is a resrouce map namespace.
570
     */
571
    public static boolean isResourceMap(ObjectFormatIdentifier formatId) {
572
        boolean isResourceMap = false;
573
        if(formatId != null && resourceMapNamespaces != null) {
574
            for(String namespace : resourceMapNamespaces) {
575
                if(namespace != null && formatId.getValue() != null && !formatId.getValue().trim().equals("") && formatId.getValue().equals(namespace)) {
576
                    isResourceMap = true;
577
                    break;
578
                }
579
            }
580
        }
581
        return isResourceMap;
582
    }
583
    
584
   
585
    
586
    /*
587
     * Generate index for the id.
588
     */
589
    private void generateIndex(String id)  {
590
        //if id is null and sysmeta will be null. If sysmeta is null, it will be caught in solrIndex.update
591
        SystemMetadata sysmeta = getSystemMetadata(id);
592
        Identifier pid = new Identifier();
593
        pid.setValue(id);
594
        solrIndex.update(pid, sysmeta);
595
 
596
    }
597
    
598
    /*
599
     * Remove the solr index for the list of ids
600
     */
601
    /*private void removeIndex(List<String> ids) {
602
        if(ids!= null) {
603
            for(String id :ids) {
604
                try {
605
                    removeIndex(id);
606
                } catch (Exception e) {
607
                    IndexEvent event = new IndexEvent();
608
                    Identifier pid = new Identifier();
609
                    pid.setValue(id);
610
                    event.setIdentifier(pid);
611
                    event.setDate(Calendar.getInstance().getTime());
612
                    event.setAction(Event.DELETE);
613
                    String error = "IndexGenerator.index - Metacat Index couldn't remove the index for the id - "+id+" because "+e.getMessage();
614
                    event.setDescription(error);
615
                    try {
616
                        EventlogFactory.createIndexEventLog().write(event);
617
                    } catch (Exception ee) {
618
                        log.error("SolrIndex.insertToIndex - IndexEventLog can't log the index deleting event :"+ee.getMessage());
619
                    }
620
                    log.error(error);
621
                }
622
                
623
            }
624
        }
625
    }*/
626
    
627
    /*
628
     * Remove the index for the id
629
     */
630
    /*private void removeIndex(String id) throws ServiceFailure, XPathExpressionException, NotImplemented, NotFound, UnsupportedType, IOException, SolrServerException, SAXException, ParserConfigurationException, OREParserException  {
631
        if(id != null) {
632
            //solrIndex.remove(id);
633
        }
634
    }*/
635
    
636
    /*
637
     * Initialize the system metadata map
638
     */
639
    private void initSystemMetadataMap() throws FileNotFoundException, ServiceFailure{
640
        int times = 0;
641
        if(systemMetadataMap == null) {
642
            systemMetadataMap = DistributedMapsFactory.getSystemMetadataMap();
643
        }
644
    }
645
    
646
    /*
647
     * We should call this method after calling initSystemMetadataMap since this method doesn't have the mechanism to wait the readiness of the hazelcast service
648
     */
649
    private void initObjectPathMap() throws FileNotFoundException, ServiceFailure {
650
        if(objectPathMap == null) {
651
            objectPathMap = DistributedMapsFactory.getObjectPathMap();
652
        }
653
    }
654
    
655
    
656
    
657
    /*
658
     * Initialize the index queue
659
     */
660
    private void initIndexQueue() throws FileNotFoundException, ServiceFailure {
661
        if(indexQueue == null) {
662
            indexQueue = DistributedMapsFactory.getIndexQueue();
663
        }
664
    }
665
    /**
666
     * Get an InputStream as the data object for the specific pid.
667
     * @param pid
668
     * @return
669
     * @throws FileNotFoundException
670
     */
671
    private InputStream getDataObject(String pid) throws FileNotFoundException {
672
        Identifier identifier = new Identifier();
673
        identifier.setValue(pid);
674
        String objectPath = objectPathMap.get(identifier);
675
        InputStream data = null;
676
        data = new FileInputStream(objectPath);
677
        return data;
678

    
679
    }
680
    
681
    /**
682
     * Get the SystemMetadata for the specified id from the distributed Map.
683
     * The null maybe is returned if there is no system metadata found.
684
     * @param id  the specified id.
685
     * @return the SystemMetadata associated with the id.
686
     */
687
    private SystemMetadata getSystemMetadata(String id) {
688
        SystemMetadata metadata = null;
689
        if(systemMetadataMap != null && id != null) {
690
            Identifier identifier = new Identifier();
691
            identifier.setValue(id);
692
            metadata = systemMetadataMap.get(identifier);
693
        }
694
        return metadata;
695
    }
696
    
697
    /**
698
     * Get the obsoletes chain of the specified id. The returned list doesn't include
699
     * the specified id itself. The newer version has the lower index number in the list.
700
     * Empty list will be returned if there is no document to be obsoleted by this id.
701
     * @param id
702
     * @return
703
     */
704
    private List<String> getObsoletes(String id) {
705
        List<String> obsoletes = new ArrayList<String>();
706
        while (id != null) {
707
            SystemMetadata metadata = getSystemMetadata(id);
708
            id = null;//set it to be null in order to stop the while loop if the id can't be assinged to a new value in the following code.
709
            if(metadata != null) {
710
                Identifier identifier = metadata.getObsoletes();
711
                if(identifier != null && identifier.getValue() != null && !identifier.getValue().trim().equals("")) {
712
                    obsoletes.add(identifier.getValue());
713
                    id = identifier.getValue();
714
                } 
715
            } 
716
        }
717
        return obsoletes;
718
    }
719
    
720
    /**
721
     * Overwrite and do nothing
722
     */
723
    public boolean cancel() {
724
        return true;
725
    }
726

    
727
}
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