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/**
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* '$RCSfile$'
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* Purpose: A class that gets Accession Number, check for uniqueness
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* and register it into db
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Jivka Bojilova, Matt Jones
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*
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* '$Author: leinfelder $'
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* '$Date: 2011-11-02 20:40:12 -0700 (Wed, 02 Nov 2011) $'
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* '$Revision: 6595 $'
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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.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.InputStream;
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import java.util.ArrayList;
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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 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.NotImplemented;
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import org.dataone.service.exceptions.ServiceFailure;
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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 com.hazelcast.core.IMap;
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import com.hazelcast.core.ISet;
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import edu.ucsb.nceas.metacat.index.event.EventlogFactory;
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import edu.ucsb.nceas.metacat.index.event.IndexEvent;
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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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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 static int waitingTime = WAITTIME;
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private static int maxAttempts = MAXWAITNUMBER;
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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 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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try {
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waitingTime = Settings.getConfiguration().getInt(WAITIMEPOPERTYNAME);
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maxAttempts = Settings.getConfiguration().getInt(MAXATTEMPTSPROPERTYNAME);
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} catch (Exception e) {
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log.warn("IndexGenerator.constructor - couldn't read the waiting time or maxattempts from the metacat.properties file since : "+e.getMessage()+". Default values will be used");
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waitingTime = WAITTIME;
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maxAttempts = MAXWAITNUMBER;
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}
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}
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/**
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* Build the index for all documents in Metacat without overwriting.
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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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*/
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/*public void indexAll() throws InvalidRequest, InvalidToken, NotAuthorized,
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NotImplemented, ServiceFailure, SolrServerException, FileNotFoundException, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException {
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boolean force = false;
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indexAll(force);
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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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*/
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public void indexAll() throws InvalidRequest, InvalidToken,
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NotAuthorized, NotImplemented, ServiceFailure, SolrServerException, FileNotFoundException, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException {
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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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*/
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public void index(Date since) throws InvalidRequest, InvalidToken,
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NotAuthorized, NotImplemented, ServiceFailure, SolrServerException, FileNotFoundException, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException {
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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 FileNotFoundException
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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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*/
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public void index(Date since, Date until) throws SolrServerException, InvalidRequest,
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InvalidToken, NotAuthorized, NotImplemented, ServiceFailure, FileNotFoundException, ClassNotFoundException, InstantiationException, IllegalAccessException, IndexEventLogException {
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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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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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//figure out the procesedDate by comparing the last element of otherMetacatIds and resourceMapIds.
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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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}
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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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}
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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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218
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}
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219
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220
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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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222
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List<String> failedOtherIds = new ArrayList<String>();
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223
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List<String> failedResourceMapIds = new ArrayList<String>();
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224
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if(failedEvents != null) {
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225
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for(IndexEvent event : failedEvents) {
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226
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String id = event.getIdentifier().getValue();
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227
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SystemMetadata sysmeta = getSystemMetadata(id);
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228
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if(sysmeta != null && !sysmeta.getArchived()) {
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229
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ObjectFormatIdentifier formatId =sysmeta.getFormatId();
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230
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if(formatId != null && formatId.getValue() != null && resourceMapNamespaces != null && isResourceMap(formatId)) {
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231
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failedResourceMapIds.add(id);
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232
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} else {
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233
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failedOtherIds.add(id);
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234
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}
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235
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}
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236
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}
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237
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}
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238
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239
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if(!failedOtherIds.isEmpty()) {
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240
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failedOtherIds.addAll(otherMetacatIds);
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241
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} else {
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242
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failedOtherIds = otherMetacatIds;
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243
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}
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244
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245
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if(!failedResourceMapIds.isEmpty()) {
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246
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failedResourceMapIds.addAll(resourceMapIds);
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247
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} else {
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248
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failedResourceMapIds = resourceMapIds;
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249
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}
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250
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251
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log.info("the metacat ids (exception resource map -----------------------------"+failedOtherIds);
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252
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log.info("the metacat resroucemap ids -----------------------------"+failedResourceMapIds);
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253
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index(failedOtherIds);
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254
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index(failedResourceMapIds);
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255
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256
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//record the timed index.
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257
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if(processedDate != null) {
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258
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EventlogFactory.createIndexEventLog().setLastProcessDate(processedDate);
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259
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}
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260
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261
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}
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262
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|
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263
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/*
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264
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* Doing index
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265
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*/
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266
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private void index(List<String> metacatIds) {
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267
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if(metacatIds != null) {
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268
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for(String metacatId : metacatIds) {
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269
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if(metacatId != null) {
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270
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try {
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271
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generateIndex(metacatId);
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272
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} catch (Exception e) {
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273
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log.error("IndexGenerator.index - Metacat Index couldn't generate the index for the id - "+metacatId+" because "+e.getMessage());
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274
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}
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275
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276
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277
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}
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278
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}
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279
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}
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280
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}
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281
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282
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public void run() {
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283
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/*IndexEvent event = new IndexEvent();
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284
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event.setDate(Calendar.getInstance().getTime());
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285
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event.setType(IndexEvent.STARTTIMEDINDEX);
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286
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event.setDescription("Start the timed index job");
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287
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try {
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288
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EventlogFactory.createIndexEventLog().write(event);
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289
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} catch (Exception e) {
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290
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log.error("IndexGenerator.run - IndexEventLog can't log the timed indexing start event :"+e.getMessage());
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291
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}*/
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292
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try {
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293
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Date since = EventlogFactory.createIndexEventLog().getLastProcessDate();
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294
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index(since);
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295
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} catch (InvalidRequest e) {
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296
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// TODO Auto-generated catch block
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297
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//e.printStackTrace();
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298
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
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299
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} catch (InvalidToken e) {
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300
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// TODO Auto-generated catch block
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301
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//e.printStackTrace();
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302
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
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303
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} catch (NotAuthorized e) {
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304
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// TODO Auto-generated catch block
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305
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//e.printStackTrace();
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306
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} catch (NotImplemented e) {
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307
|
// TODO Auto-generated catch block
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308
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//e.printStackTrace();
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309
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
310
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} catch (ServiceFailure e) {
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311
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// TODO Auto-generated catch block
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312
|
//e.printStackTrace();
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313
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
314
|
} catch (SolrServerException e) {
|
|
315
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// TODO Auto-generated catch block
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|
316
|
//e.printStackTrace();
|
|
317
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
318
|
} catch (FileNotFoundException e) {
|
|
319
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
320
|
}
|
|
321
|
/*event.setDate(Calendar.getInstance().getTime());
|
|
322
|
event.setType(IndexEvent.FINISHTIMEDINDEX);
|
|
323
|
event.setDescription("Finish the timed index job");
|
|
324
|
try {
|
|
325
|
EventlogFactory.createIndexEventLog().write(event);
|
|
326
|
} catch (Exception e) {
|
|
327
|
log.error("IndexGenerator.run - IndexEventLog can't log the timed indexing finish event :"+e.getMessage());
|
|
328
|
}*/ catch (ClassNotFoundException e) {
|
|
329
|
// TODO Auto-generated catch block
|
|
330
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log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
331
|
} catch (InstantiationException e) {
|
|
332
|
// TODO Auto-generated catch block
|
|
333
|
log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
334
|
} catch (IllegalAccessException e) {
|
|
335
|
// TODO Auto-generated catch block
|
|
336
|
log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
337
|
} catch (IndexEventLogException e) {
|
|
338
|
// TODO Auto-generated catch block
|
|
339
|
log.error("IndexGenerator.run - Metadata-Index couldn't generate indexes for those documents which haven't been indexed : "+e.getMessage());
|
|
340
|
}
|
|
341
|
}
|
|
342
|
|
|
343
|
/*
|
|
344
|
* Get the indexed ids list from the solr server.
|
|
345
|
* An empty list will be returned if there is no ids.
|
|
346
|
*/
|
|
347
|
private List<String> getSolrDocIds() throws SolrServerException {
|
|
348
|
List<String> ids = solrIndex.getSolrIds();
|
|
349
|
return ids;
|
|
350
|
}
|
|
351
|
|
|
352
|
/*
|
|
353
|
* Get an array of the list of ids of the metacat which has the systemmetadata modification in the range.
|
|
354
|
*
|
|
355
|
* If since and util are null, it will return all of them.
|
|
356
|
* 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.
|
|
357
|
* The reason to split them is when we index the resource map, we need the index of the documents in the resource map ready.
|
|
358
|
* The last element in the each list has the latest SystemMetadata modification date. But they are not sorted.
|
|
359
|
*/
|
|
360
|
private List[] getMetacatIds(Date since, Date until) throws InvalidRequest,
|
|
361
|
InvalidToken, NotAuthorized, NotImplemented, ServiceFailure, FileNotFoundException {
|
|
362
|
|
|
363
|
List<String> resourceMapIds = new ArrayList();
|
|
364
|
List<String> otherIds = new ArrayList();
|
|
365
|
List[] ids = new List[2];
|
|
366
|
ids[FIRST]= otherIds;
|
|
367
|
ids[SECOND] = resourceMapIds;
|
|
368
|
ISet<Identifier> metacatIds = DistributedMapsFactory.getIdentifiersSet();
|
|
369
|
Date otherPreviousDate = null;
|
|
370
|
Date resourceMapPreviousDate = null;
|
|
371
|
if(metacatIds != null) {
|
|
372
|
for(Identifier identifier : metacatIds) {
|
|
373
|
if(identifier != null && identifier.getValue() != null && !identifier.getValue().equals("")) {
|
|
374
|
SystemMetadata sysmeta = getSystemMetadata(identifier.getValue());
|
|
375
|
if(sysmeta != null && !sysmeta.getArchived()) {
|
|
376
|
ObjectFormatIdentifier formatId =sysmeta.getFormatId();
|
|
377
|
//System.out.println("the object format id is "+formatId.getValue());
|
|
378
|
//System.out.println("the ============ resourcMapNamespaces"+resourceMapNamespaces);
|
|
379
|
boolean correctTimeRange = false;
|
|
380
|
Date sysDate = sysmeta.getDateSysMetadataModified();
|
|
381
|
if(since == null && until == null) {
|
|
382
|
correctTimeRange = true;
|
|
383
|
} else if (since != null && until == null) {
|
|
384
|
if(sysDate.getTime() >= since.getTime()) {
|
|
385
|
correctTimeRange = true;
|
|
386
|
}
|
|
387
|
} else if (since == null && until != null) {
|
|
388
|
if(sysDate.getTime() <= until.getTime()) {
|
|
389
|
correctTimeRange = true;
|
|
390
|
}
|
|
391
|
} else if (since != null && until != null) {
|
|
392
|
if(sysDate.getTime() >= since.getTime() && sysDate.getTime() <= until.getTime()) {
|
|
393
|
correctTimeRange = true;
|
|
394
|
}
|
|
395
|
}
|
|
396
|
if(correctTimeRange && formatId != null && formatId.getValue() != null && resourceMapNamespaces != null && isResourceMap(formatId)) {
|
|
397
|
//for the resource map
|
|
398
|
if(!resourceMapIds.isEmpty()) {
|
|
399
|
if(sysDate.getTime() > resourceMapPreviousDate.getTime()) {
|
|
400
|
resourceMapIds.add(identifier.getValue());//append to the end of the list if current is later than the previous one
|
|
401
|
} else {
|
|
402
|
int size = resourceMapIds.size();//
|
|
403
|
resourceMapIds.add(size -1, identifier.getValue());//keep the previous one at the end of the list.
|
|
404
|
}
|
|
405
|
} else {
|
|
406
|
resourceMapIds.add(identifier.getValue());
|
|
407
|
}
|
|
408
|
resourceMapPreviousDate = sysDate;
|
|
409
|
} else {
|
|
410
|
if(!otherIds.isEmpty()) {
|
|
411
|
if(sysDate.getTime() > otherPreviousDate.getTime()) {
|
|
412
|
otherIds.add(identifier.getValue());
|
|
413
|
} else {
|
|
414
|
int size = otherIds.size();
|
|
415
|
otherIds.add(size-1, identifier.getValue());
|
|
416
|
}
|
|
417
|
} else {
|
|
418
|
otherIds.add(identifier.getValue());
|
|
419
|
}
|
|
420
|
otherPreviousDate = sysDate;
|
|
421
|
}
|
|
422
|
|
|
423
|
}
|
|
424
|
}
|
|
425
|
}
|
|
426
|
}
|
|
427
|
return ids;
|
|
428
|
}
|
|
429
|
|
|
430
|
/*
|
|
431
|
* If the specified ObjectFormatIdentifier is a resrouce map namespace.
|
|
432
|
*/
|
|
433
|
public static boolean isResourceMap(ObjectFormatIdentifier formatId) {
|
|
434
|
boolean isResourceMap = false;
|
|
435
|
if(formatId != null && resourceMapNamespaces != null) {
|
|
436
|
for(String namespace : resourceMapNamespaces) {
|
|
437
|
if(namespace != null && formatId.getValue() != null && !formatId.getValue().trim().equals("") && formatId.getValue().equals(namespace)) {
|
|
438
|
isResourceMap = true;
|
|
439
|
break;
|
|
440
|
}
|
|
441
|
}
|
|
442
|
}
|
|
443
|
return isResourceMap;
|
|
444
|
}
|
|
445
|
|
|
446
|
|
|
447
|
|
|
448
|
/*
|
|
449
|
* Generate index for the id.
|
|
450
|
*/
|
|
451
|
private void generateIndex(String id) throws Exception {
|
|
452
|
if(id != null) {
|
|
453
|
SystemMetadata sysmeta = getSystemMetadata(id);
|
|
454
|
//only update none-archived id.
|
|
455
|
if(sysmeta != null && !sysmeta.getArchived()) {
|
|
456
|
InputStream data = getDataObject(id);
|
|
457
|
Identifier obsolete = sysmeta.getObsoletes();
|
|
458
|
List<String> obsoleteChain = null;
|
|
459
|
if(obsolete != null) {
|
|
460
|
obsoleteChain = getObsoletes(id);
|
|
461
|
}
|
|
462
|
solrIndex.update(id, obsoleteChain, sysmeta, data);
|
|
463
|
} else {
|
|
464
|
throw new Exception("IndexGenerator.generate - there is no found SystemMetadata associated with the id "+id);
|
|
465
|
}
|
|
466
|
|
|
467
|
}
|
|
468
|
}
|
|
469
|
|
|
470
|
/*
|
|
471
|
* Initialize the system metadata map
|
|
472
|
*/
|
|
473
|
private void initSystemMetadataMap() throws FileNotFoundException, ServiceFailure{
|
|
474
|
int times = 0;
|
|
475
|
if(systemMetadataMap == null) {
|
|
476
|
systemMetadataMap = DistributedMapsFactory.getSystemMetadataMap();
|
|
477
|
/*while(true) {
|
|
478
|
try {
|
|
479
|
systemMetadataMap = DistributedMapsFactory.getSystemMetadataMap();
|
|
480
|
break;
|
|
481
|
} catch (FileNotFoundException e) {
|
|
482
|
throw e;
|
|
483
|
} catch (ServiceFailure e) {
|
|
484
|
if(times <= maxAttempts) {
|
|
485
|
log.warn("IndexGenerator.initSystemMetadataMap - the hazelcast service is not ready : "
|
|
486
|
+e.getMessage()+"\nWe will try to access it "+waitingTime/1000+" seconds later ");
|
|
487
|
try {
|
|
488
|
Thread.sleep(waitingTime);
|
|
489
|
} catch (Exception ee) {
|
|
490
|
log.warn("IndexGenerator.initSystemMetadataMap - the thread can't sleep for "+waitingTime/1000+" seconds to wait the hazelcast service");
|
|
491
|
}
|
|
492
|
|
|
493
|
} else {
|
|
494
|
throw new ServiceFailure("0000", "IndexGenerator.initSystemMetadataMap - the hazelcast service is not ready even though Metacat-index wailted for "+maxAttempts*waitingTime/1000+" seconds. We can't get the system metadata from it and the building index can't happen this time");
|
|
495
|
}
|
|
496
|
}
|
|
497
|
times++;
|
|
498
|
}*/
|
|
499
|
}
|
|
500
|
}
|
|
501
|
|
|
502
|
/*
|
|
503
|
* We should call this method after calling initSystemMetadataMap since this method doesn't have the mechanism to wait the readiness of the hazelcast service
|
|
504
|
*/
|
|
505
|
private void initObjectPathMap() throws FileNotFoundException, ServiceFailure {
|
|
506
|
if(objectPathMap == null) {
|
|
507
|
objectPathMap = DistributedMapsFactory.getObjectPathMap();
|
|
508
|
}
|
|
509
|
}
|
|
510
|
/**
|
|
511
|
* Get an InputStream as the data object for the specific pid.
|
|
512
|
* @param pid
|
|
513
|
* @return
|
|
514
|
* @throws FileNotFoundException
|
|
515
|
*/
|
|
516
|
private InputStream getDataObject(String pid) throws FileNotFoundException {
|
|
517
|
Identifier identifier = new Identifier();
|
|
518
|
identifier.setValue(pid);
|
|
519
|
String objectPath = objectPathMap.get(identifier);
|
|
520
|
InputStream data = null;
|
|
521
|
data = new FileInputStream(objectPath);
|
|
522
|
return data;
|
|
523
|
|
|
524
|
}
|
|
525
|
|
|
526
|
/**
|
|
527
|
* Get the SystemMetadata for the specified id from the distributed Map.
|
|
528
|
* The null maybe is returned if there is no system metadata found.
|
|
529
|
* @param id the specified id.
|
|
530
|
* @return the SystemMetadata associated with the id.
|
|
531
|
*/
|
|
532
|
private SystemMetadata getSystemMetadata(String id) {
|
|
533
|
SystemMetadata metadata = null;
|
|
534
|
if(systemMetadataMap != null && id != null) {
|
|
535
|
Identifier identifier = new Identifier();
|
|
536
|
identifier.setValue(id);
|
|
537
|
metadata = systemMetadataMap.get(identifier);
|
|
538
|
}
|
|
539
|
return metadata;
|
|
540
|
}
|
|
541
|
|
|
542
|
/**
|
|
543
|
* Get the obsoletes chain of the specified id. The returned list doesn't include
|
|
544
|
* the specified id itself. The newer version has the lower index number in the list.
|
|
545
|
* Empty list will be returned if there is no document to be obsoleted by this id.
|
|
546
|
* @param id
|
|
547
|
* @return
|
|
548
|
*/
|
|
549
|
private List<String> getObsoletes(String id) {
|
|
550
|
List<String> obsoletes = new ArrayList<String>();
|
|
551
|
while (id != null) {
|
|
552
|
SystemMetadata metadata = getSystemMetadata(id);
|
|
553
|
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.
|
|
554
|
if(metadata != null) {
|
|
555
|
Identifier identifier = metadata.getObsoletes();
|
|
556
|
if(identifier != null && identifier.getValue() != null && !identifier.getValue().trim().equals("")) {
|
|
557
|
obsoletes.add(identifier.getValue());
|
|
558
|
id = identifier.getValue();
|
|
559
|
}
|
|
560
|
}
|
|
561
|
}
|
|
562
|
return obsoletes;
|
|
563
|
}
|
|
564
|
|
|
565
|
/**
|
|
566
|
* Overwrite and do nothing
|
|
567
|
*/
|
|
568
|
public boolean cancel() {
|
|
569
|
return true;
|
|
570
|
}
|
|
571
|
|
|
572
|
}
|