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4959
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daigle
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/**
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* '$RCSfile$'
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* Purpose: A Class that handles scheduling tasks
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* Copyright: 2009 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Michael Daigle
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*
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* '$Author: daigle $'
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* '$Date: 2009-03-25 13:41:15 -0800 (Wed, 25 Mar 2009) $'
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* '$Revision: 4861 $'
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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.workflow;
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.HashMap;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.scheduler.BaseScheduler;
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import edu.ucsb.nceas.metacat.scheduler.SchedulerService;
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import edu.ucsb.nceas.metacat.scheduler.MetacatSchedulerException;
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import edu.ucsb.nceas.metacat.service.ServiceException;
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public class WorkflowScheduler extends BaseScheduler {
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private static WorkflowScheduler workflowScheduler = null;
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private static Logger logMetacat = Logger.getLogger(WorkflowScheduler.class);
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private static String SCHEDULED_JOB_GROUP = "workflow";
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private static String SCHEDULED_JOB_CLASS = "edu.ucsb.nceas.metacat.workflow.WorkflowJob";
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/**
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* private constructor since this is a singleton
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*/
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private WorkflowScheduler() {}
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/**
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* Get the single instance of SchedulerService.
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*
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* @return the single instance of SchedulerService
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*/
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public static WorkflowScheduler getInstance() {
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if (workflowScheduler == null) {
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workflowScheduler = new WorkflowScheduler();
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}
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return workflowScheduler;
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}
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public String scheduleJob(Hashtable<String, String[]> params,
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HttpServletRequest request, HttpServletResponse response, String username,
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String[] groups) throws MetacatSchedulerException {
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String delays[] = params.get("delay");
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String startTimes[] = params.get("starttime");
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HashMap<String, String> jobParams = new HashMap<String, String>();
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Calendar startCal = null;
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try {
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SchedulerService schedulerService = SchedulerService.getInstance();
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if (delays != null && delays.length > 0) {
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startCal = schedulerService.getStartDateFromDelay(delays[0]);
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} else if (startTimes != null && startTimes.length > 0) {
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Date startDate = DateFormat.getInstance().parse(startTimes[0]);
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startCal = Calendar.getInstance();
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startCal.setTime(startDate);
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} else {
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// if delay and starttime were not provided, set date to now.
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startCal = Calendar.getInstance();
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}
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String intervals[] = params.get("interval");
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if (intervals == null || intervals.length == 0) {
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throw new MetacatSchedulerException(
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"SchedulerService.scheduleHandler - Interval field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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String interval = intervals[0];
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Enumeration<String> paramNames = params.keys();
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while (paramNames.hasMoreElements()) {
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String paramName = paramNames.nextElement();
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if (paramName.startsWith("jobparam_")) {
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jobParams.put(paramName.substring(9), params.get(paramName)[0]);
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}
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}
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String jobName = SCHEDULED_JOB_GROUP
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+ Calendar.getInstance().getTimeInMillis();
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return schedulerService.scheduleJob(jobName, startCal, interval,
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SCHEDULED_JOB_CLASS, SCHEDULED_JOB_GROUP, jobParams);
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} catch (ParseException pe) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleHandler - Could not " + "schedule job : "
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+ pe.getMessage());
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} catch (ServiceException se) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleHandler - Service issue scheduling job", se);
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}
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}
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public String unScheduleJob(Hashtable<String, String[]> params,
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HttpServletRequest request, HttpServletResponse response,
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String username, String[] groups) throws MetacatSchedulerException {
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return "";
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}
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public String deleteJob(Hashtable<String, String[]> params,
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HttpServletRequest request, HttpServletResponse response,
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String username, String[] groups) throws MetacatSchedulerException {
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return "";
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}
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public String getJobs(Hashtable<String, String[]> params,
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HttpServletRequest request, HttpServletResponse response,
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String username, String[] groups) throws MetacatSchedulerException {
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String groupName = null;
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String groupNames[] = params.get("groupName");
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if (groupNames != null && groupNames.length != 0) {
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groupName = groupNames[0];
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}
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try {
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return SchedulerService.getInstance().getJobsInfoXML(groupName);
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} catch (ServiceException se) {
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throw new MetacatSchedulerException("WorkflowScheduler.getJobs - Service issue getting jobs", se);
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}
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}
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}
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