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2732
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sgarg
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/**
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* '$RCSfile$'
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* Purpose: A Class that tracks sessions for MetaCatServlet users.
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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: Matt Jones
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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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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;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.TimerTask;
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2758
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sgarg
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import java.util.Vector;
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import java.util.Iterator;
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2732
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sgarg
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import edu.ucsb.nceas.metacat.MetaCatUtil;
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import org.apache.log4j.Logger;
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public class IndexingTimerTask extends TimerTask{
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private Logger logMetacat = Logger.getLogger(IndexingTimerTask.class);
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int count = 0;
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/*
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* Run a separate thread to build the XML index for this document. This
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* thread is run asynchronously in order to more quickly return control to
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* the submitting user. The run method checks to see if the document has
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* been fully inserted before trying to update the xml_index table.
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*/
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public void run()
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{
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DBConnection dbConn = null;
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int serialNumber = 0;
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try{
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logMetacat.warn("Running indexing timer task");
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2759
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sgarg
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dbConn = DBConnectionPool.getDBConnection("IndexingThread");
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2732
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sgarg
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serialNumber = dbConn.getCheckOutSerialNumber();
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2758
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sgarg
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Vector indexNamespaces = MetaCatUtil.getOptionList(MetaCatUtil.getOption("indexNamespaces"));
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String nonJoinCriteria = "b.docid is NULL";
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boolean first = true;
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if(indexNamespaces != null && !indexNamespaces.isEmpty()){
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Iterator it = indexNamespaces.iterator();
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while(it.hasNext()){
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if(first){
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nonJoinCriteria = nonJoinCriteria + " AND (";
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nonJoinCriteria = nonJoinCriteria
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+ " a.doctype like '"
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+ it.next()
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+ "'";
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first = false;
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} else {
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nonJoinCriteria = nonJoinCriteria + " OR ";
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nonJoinCriteria = nonJoinCriteria
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+ " a.doctype like '"
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+ it.next()
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+ "'";
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}
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}
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nonJoinCriteria = nonJoinCriteria + ")";
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} else {
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// if no namespaces are defined in metacat.properties then return
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return;
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}
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2732
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sgarg
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String xmlDocumentsCheck =
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MetaCatUtil.dbAdapter.getLeftJoinQuery("a.docid, a.rev", "xml_documents",
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2780
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sgarg
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"xml_index", "a.docid = b.docid", nonJoinCriteria);
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2758
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sgarg
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PreparedStatement xmlDocCheck = dbConn.prepareStatement(xmlDocumentsCheck);
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2732
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sgarg
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// Increase usage count
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dbConn.increaseUsageCount(1);
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xmlDocCheck.execute();
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ResultSet rs = xmlDocCheck.getResultSet();
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boolean tableHasRows = rs.next();
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while (tableHasRows) {
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String docid = rs.getString(1);
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String rev = rs.getString(2);
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sgarg
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IndexingQueue.getInstance().add(docid, rev);
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2732
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sgarg
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tableHasRows = rs.next();
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}
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rs.close();
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xmlDocCheck.close();
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} catch (SQLException se){
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se.printStackTrace();
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} catch (Exception e){
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e.printStackTrace();
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}finally {
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DBConnectionPool.returnDBConnection(dbConn, serialNumber);
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}
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logMetacat.warn("Indexing timer task returning");
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count++;
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}
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}
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