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/**
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* '$RCSfile$'
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* Copyright: 2004 University of New Mexico and the
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* Regents of the University of California
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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.harvesterClient;
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import javax.servlet.*;
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import javax.servlet.http.*;
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/**
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* HarvesterServlet class allows Harvester to be run as a background
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* process. This eliminates the need to run Harvester in a terminal window.
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* To activate this servlet, uncomment the HarvesterServlet entry in the
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* appropriate 'lib/web.xml.tomcat*' file.
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*
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* @author costa
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*/
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public class HarvesterServlet extends HttpServlet implements Runnable {
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Thread harvesterThread; // background Harvester thread
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/**
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* Initializes the servlet by starting a separate thread in which to
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* run the Harvester main program.
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*/
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public void init() throws ServletException {
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harvesterThread = new Thread(this);
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harvesterThread.setPriority(Thread.MIN_PRIORITY); // be a good citizen
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harvesterThread.start();
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}
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/**
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* Runs the Harvester main program in a separate thread. First sleeps for
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* 30 seconds to give Metacat a chance to fully initialize.
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*/
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public void run() {
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String[] args = new String[1];
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String schemaLocation = "eml://ecoinformatics.org/harvestList " +
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"http://cvs.ecoinformatics.org/cvs/cvsweb.cgi/~checkout~" +
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"/metacat/lib/harvester/harvestList.xsd?rev=1.1&content-type=text" +
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"/plain&only_with_tag=HEAD";
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args[0] = schemaLocation;
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try {
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Thread.sleep(30000); // Sleep 30 seconds before starting Harvester
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}
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catch (InterruptedException e) {
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System.err.println("InterruptedException: " + e.getMessage());
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}
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Harvester.main(args);
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}
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/**
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* Stops the Harvester thread when the servlet shuts down.
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*/
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public void destroy() {
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harvesterThread.stop();
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}
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}
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Implement a new HarvesterServlet for running Harvester as a servlet. This eliminates the need to run Harvester in a terminal window. By default, the HarvesterServlet is commented out in lib/web.xml.tomcat(3,4,5). The user documentation will be modified to instruct Harvester administrators to uncomment the HarvesterServlet entry.