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/**
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* '$RCSfile$'
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* Purpose: A Class that handles scheduling workflow jobs
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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.workflowscheduler;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.StringReader;
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import java.util.Calendar;
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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 javax.xml.xpath.XPath;
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import javax.xml.xpath.XPathFactory;
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import org.apache.log4j.Logger;
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import org.xml.sax.InputSource;
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import org.ecoinformatics.ecogrid.client.AuthenticationServiceClient;
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import org.ecoinformatics.ecogrid.client.AuthorizationServiceClient;
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import edu.ucsb.nceas.metacat.scheduler.BaseScheduler;
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import edu.ucsb.nceas.metacat.scheduler.ScheduledJobAccess;
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import edu.ucsb.nceas.metacat.scheduler.ScheduledJobDAO;
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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.accesscontrol.AccessControlInterface;
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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import edu.ucsb.nceas.metacat.shared.AccessException;
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import edu.ucsb.nceas.metacat.shared.ServiceException;
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import edu.ucsb.nceas.metacat.util.ErrorSendingErrorException;
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import edu.ucsb.nceas.metacat.util.ResponseUtil;
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import edu.ucsb.nceas.utilities.DateUtil;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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import edu.ucsb.nceas.utilities.UtilException;
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/**
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* @author daigle
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*
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*/
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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 WORKFLOW_JOB_GROUP = "workflow";
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private static String WORKFLOW_JOB_CLASS = "edu.ucsb.nceas.workflowscheduler.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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/**
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* Scheduling a workflow
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*
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* @param request
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* the servlet request object
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* @param response
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* the servlet response object
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* @param params
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* the request parameters
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* @param username
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* the user
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* @param groups
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* the user's group
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*/
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public void scheduleJob(HttpServletRequest request, HttpServletResponse response,
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Hashtable<String, String[]> params) throws MetacatSchedulerException {
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String sessionIds[] = params.get("sessionid");
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String delays[] = params.get("delay");
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String startTimes[] = params.get("starttime");
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String endTimes[] = params.get("endtime");
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HashMap<String, String> jobParams = new HashMap<String, String>();
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Calendar startCal = null;
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Calendar endCal = null;
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if (sessionIds == null) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - sessionid field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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String sessionStatus = validateRemoteSession(sessionIds[0]);
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logMetacat.debug("WorkflowScheduler.scheduleJob - session status: " + sessionStatus);
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if (!sessionStatus.equals("valid")) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - session "
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+ request.getSession().getId() + " is not valid.");
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}
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try {
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SchedulerService schedulerService = SchedulerService.getInstance();
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// get start time or delay. Start time takes precedence if both exist.
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if (startTimes != null && startTimes.length > 0) {
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startCal = DateUtil.humanReadableToCalendar(startTimes[0], "MM/dd/yyyy HH:mm:ss");
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} else if (delays != null && delays.length > 0) {
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startCal = schedulerService.getStartDateFromDelay(delays[0]);
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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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// get end time. null is fine.
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if (endTimes != null && endTimes.length > 0) {
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endCal = DateUtil.humanReadableToCalendar(endTimes[0], "MM/dd/yyyy HH:mm:ss");
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}
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// interval value must exist
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String intervalValues[] = params.get("intervalvalue");
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if (intervalValues == null || intervalValues.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - intervalvalue field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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String intervalStrValue = intervalValues[0];
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int intervalValue = Integer.parseInt(intervalStrValue);
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// interval unit must exist
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String intervalUnits[] = params.get("intervalunit");
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if (intervalUnits == null || intervalUnits.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - intervalunit field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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String intervalUnit = intervalUnits[0];
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// workflow id must exist. Add to job params
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String workflowids[] = params.get("workflowid");
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if (workflowids == null || workflowids.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - workflowid field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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jobParams.put("workflowid", workflowids[0]);
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String workflowAuthorizeStatus = authorizeRemoteSession(sessionIds[0], workflowids[0], AccessControlInterface.WRITESTRING);
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if (!workflowAuthorizeStatus.equals("true")) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - session "
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+ request.getSession().getId() + " is not authorized to write workflow " + workflowids[0] + ".");
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}
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// kar id must exist. Add to job params
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String karids[] = params.get("karid");
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if (karids == null || karids.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - karid field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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jobParams.put("karid", karids[0]);
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String karAuthorizeStatus = authorizeRemoteSession(sessionIds[0], karids[0], AccessControlInterface.READSTRING);
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if (!karAuthorizeStatus.equals("true")) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - session "
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+ request.getSession().getId() + " is not authorized to read kar " + karids[0] + ".");
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}
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// workflow name unit must exist. Add to job params
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String workflownames[] = params.get("workflowname");
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if (workflownames == null || workflownames.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - workflowname field must be populated "
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+ "in scheduler parameters when scheduling job.");
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}
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jobParams.put("workflowname", workflownames[0]);
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String jobName = WORKFLOW_JOB_GROUP
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+ Calendar.getInstance().getTimeInMillis();
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// Schedule the job
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String xmlResult = schedulerService.scheduleJob(jobName, startCal, endCal, intervalValue, intervalUnit,
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WORKFLOW_JOB_CLASS, WORKFLOW_JOB_GROUP, jobParams);
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ResponseUtil.sendSuccessXML(response, xmlResult);
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} catch (UtilException ue) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - "
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+ "Utility issue when scheduling job: " + ue.getMessage());
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} catch (ServiceException se) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - "
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+ "Service issue when scheduling job", se);
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} catch (ErrorSendingErrorException esee) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - "
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+ "Issue sending error when scheduling job: " + esee.getMessage());
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}
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}
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/**
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* Unschedule a job
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*
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* @param request
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* the servlet request object
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* @param response
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* the servlet response object
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* @param params
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* the request parameters
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* @param username
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* the user
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* @param groups
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* the user's group
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*/
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public void unscheduleJob(HttpServletRequest request, HttpServletResponse response,
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Hashtable<String, String[]> params, String username, String[] groups)
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throws MetacatSchedulerException {
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try {
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String sessionIds[] = params.get("sessionid");
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// interval value must exist
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if (sessionIds == null || sessionIds.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.unscheduleJob - sessionid field must be populated "
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+ "in scheduler parameters when unscheduling job.");
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}
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String sessionStatus = validateRemoteSession(sessionIds[0]);
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logMetacat.debug("WorkflowScheduler.unscheduleJob - session status: " + sessionStatus);
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if (!sessionStatus.equals("valid")) {
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throw new MetacatSchedulerException("WorkflowScheduler.unscheduleJob - session "
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+ sessionIds[0] + " is not valid.");
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}
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// workflow job id must exist
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String jobNames[] = params.get("workflowjobname");
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if (jobNames == null || jobNames.length == 0) {
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throw new MetacatSchedulerException("SchedulerService.unScheduleJob - workflowjobname "
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+ "field must be populated in scheduler parameters when unscheduling job.");
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}
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String jobName = jobNames[0];
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// unschedule the job
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SchedulerService schedulerService = SchedulerService.getInstance();
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String xmlResult = schedulerService.unscheduleJob(jobName, username, groups);
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ResponseUtil.sendSuccessXML(response, xmlResult);
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} catch (ServiceException se) {
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throw new MetacatSchedulerException("WorkflowScheduler.unScheduleJob - "
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+ "Service issue unscheduling job", se);
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} catch (Exception e) {
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throw new MetacatSchedulerException("WorkflowScheduler.unScheduleJob - "
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+ "Generic issue unscheduling job: " + e.getMessage());
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}
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}
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/**
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* reschedule job
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*
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* @param request
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* the servlet request object
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* @param response
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* the servlet response object
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* @param params
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* the request parameters
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* @param username
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* the user
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* @param groups
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* the user's group
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*/
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public void rescheduleJob(HttpServletRequest request, HttpServletResponse response,
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Hashtable<String, String[]> params, String username,
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String[] groups) throws MetacatSchedulerException {
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try {
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String sessionIds[] = params.get("sessionid");
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// interval value must exist
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if (sessionIds == null || sessionIds.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.rescheduleJob - sessionid field must be populated "
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+ "in scheduler parameters when rescheduling job.");
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}
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String sessionStatus = validateRemoteSession(sessionIds[0]);
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logMetacat.debug("WorkflowScheduler.rescheduleJob - session status: " + sessionStatus);
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if (!sessionStatus.equals("valid")) {
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throw new MetacatSchedulerException("WorkflowScheduler.scheduleJob - session "
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+ sessionIds[0] + " is not valid.");
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}
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// workflow job id must exist
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String jobNames[] = params.get("workflowjobname");
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if (jobNames == null || jobNames.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.rescheduleJob - workflowjobname field must be populated "
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+ "in scheduler parameters when rescheduling job.");
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}
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String jobName = jobNames[0];
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ScheduledJobAccess jobAccess = new ScheduledJobAccess();
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ScheduledJobDAO jobDAO = jobAccess.getJobByName(jobName);
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// reschedule the job
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SchedulerService schedulerService = SchedulerService.getInstance();
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String result = schedulerService.rescheduleJob(jobDAO, username, groups);
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ResponseUtil.sendSuccessXML(response, result);
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} catch (AccessException ae) {
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throw new MetacatSchedulerException("WorkflowScheduler.rescheduleJob - "
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+ "DB access issue when rescheduling job : ", ae);
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} catch (ServiceException se) {
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throw new MetacatSchedulerException("WorkflowScheduler.rescheduleJob - "
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+ "Service issue rescheduling job", se);
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} catch (ErrorSendingErrorException esee) {
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throw new MetacatSchedulerException("WorkflowScheduler.rescheduleJob - "
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+ "Issue sending erro when rescheduling job: " + esee.getMessage());
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}
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}
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/**
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* delete job - to be implemented
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*/
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public void deleteJob(HttpServletRequest request, HttpServletResponse response,
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Hashtable<String, String[]> params, String username, String[] groups) throws MetacatSchedulerException {
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try {
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String sessionIds[] = params.get("sessionid");
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// interval value must exist
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if (sessionIds == null || sessionIds.length == 0) {
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throw new MetacatSchedulerException("WorkflowScheduler.deleteJob - sessionid field must be populated "
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+ "in scheduler parameters when deleting job.");
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}
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String sessionStatus = validateRemoteSession(sessionIds[0]);
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logMetacat.debug("WorkflowScheduler.rescheduleJob - session status: " + sessionStatus);
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if (!sessionStatus.equals("valid")) {
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throw new MetacatSchedulerException("WorkflowScheduler.deleteJob - session "
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+ sessionIds[0] + " is not valid.");
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}
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// workflow job id must exist
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String jobNames[] = params.get("workflowjobname");
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if (jobNames == null || jobNames.length == 0) {
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throw new MetacatSchedulerException(
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"WorkflowScheduler.deleteJob - workflowname field must be populated "
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+ "in scheduler parameters when deleting job.");
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}
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String jobName = jobNames[0];
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ScheduledJobAccess jobAccess = new ScheduledJobAccess();
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ScheduledJobDAO jobDAO = jobAccess.getJobByName(jobName);
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// delete the job
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SchedulerService schedulerService = SchedulerService.getInstance();
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String result = schedulerService.deleteJob(jobDAO);
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ResponseUtil.sendSuccessXML(response, result);
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} catch (AccessException ae) {
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throw new MetacatSchedulerException("WorkflowScheduler.deleteJob - "
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+ "DB access issue when deleting job : ", ae);
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} catch (ServiceException se) {
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throw new MetacatSchedulerException("WorkflowScheduler.deleteJob - "
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+ "Service issue deleting job", se);
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} catch (ErrorSendingErrorException esee) {
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throw new MetacatSchedulerException("WorkflowScheduler.deleteJob - "
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+ "Issue sending erro when deleting job: " + esee.getMessage());
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}
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}
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/**
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* get job information for a given workflow in xml format
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*
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* @param request
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* the servlet request object
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* @param response
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* the servlet response object
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* @param params
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* the request parameters
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* @param username
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* the user
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* @param groups
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* the user's group
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*/
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public void getJobs(HttpServletRequest request, HttpServletResponse response,
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Hashtable<String, String[]> params, String username, String[] groups) throws MetacatSchedulerException {
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413
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|
String workflowId = null;
|
415
|
|
416
|
String workflowIds[] = params.get("workflowid");
|
417
|
if (workflowIds != null && workflowIds.length != 0) {
|
418
|
workflowId = workflowIds[0];
|
419
|
}
|
420
|
|
421
|
logMetacat.debug("WorkflowScheduler.getJobs - getting jobs for workflow:" + workflowId);
|
422
|
|
423
|
PrintWriter out = null;
|
424
|
try {
|
425
|
// get the job info in xml format
|
426
|
out = response.getWriter();
|
427
|
SchedulerService.getInstance().getJobsInfoXML(WORKFLOW_JOB_GROUP,
|
428
|
"workflowid", workflowId, out);
|
429
|
} catch (ServiceException se) {
|
430
|
throw new MetacatSchedulerException("WorkflowScheduler.getJobs - "
|
431
|
+ "Service error when transforming XML for workflow id: "
|
432
|
+ workflowId + " : " + se.getMessage());
|
433
|
} catch (IOException ioe) {
|
434
|
throw new MetacatSchedulerException("WorkflowScheduler.getJobs - "
|
435
|
+ "I/O error when transforming XML for workflow id: "
|
436
|
+ workflowId + " : " + ioe.getMessage());
|
437
|
} finally {
|
438
|
if (out != null) {
|
439
|
out.close();
|
440
|
}
|
441
|
}
|
442
|
}
|
443
|
|
444
|
private String validateRemoteSession(String sessionId) throws MetacatSchedulerException {
|
445
|
String sessionStatus = "unknown";
|
446
|
XPath xpath = XPathFactory.newInstance().newXPath();
|
447
|
|
448
|
try {
|
449
|
String ecogridUrl = PropertyService.getProperty("workflowScheduler.authServiceUrl");
|
450
|
|
451
|
AuthenticationServiceClient authServiceClient =
|
452
|
new AuthenticationServiceClient(ecogridUrl);
|
453
|
|
454
|
String sessionStatusXML = authServiceClient.validate_session_action(sessionId);
|
455
|
|
456
|
sessionStatus =
|
457
|
xpath.evaluate("/validateSession/status", new InputSource(new StringReader(sessionStatusXML)));
|
458
|
|
459
|
|
460
|
} catch (PropertyNotFoundException pnfe) {
|
461
|
throw new MetacatSchedulerException("WorkflowScheduler.validateSession - Could not "
|
462
|
+ "find property: " + pnfe.getMessage());
|
463
|
} catch (Exception e) {
|
464
|
throw new MetacatSchedulerException("WorkflowScheduler.validateSession - "
|
465
|
+ "general error when validating Session: " + e.getMessage());
|
466
|
}
|
467
|
|
468
|
|
469
|
return sessionStatus;
|
470
|
}
|
471
|
|
472
|
private String authorizeRemoteSession(String sessionId, String resourceLsid, String permission)
|
473
|
throws MetacatSchedulerException {
|
474
|
|
475
|
String authStatus = "unknown";
|
476
|
XPath xpath = XPathFactory.newInstance().newXPath();
|
477
|
|
478
|
try {
|
479
|
String ecogridUrl = PropertyService.getProperty("workflowScheduler.authorizationServiceUrl");
|
480
|
|
481
|
AuthorizationServiceClient authorizationServiceClient =
|
482
|
new AuthorizationServiceClient(ecogridUrl);
|
483
|
|
484
|
String authStatusXML = authorizationServiceClient.is_authorized_action(sessionId, resourceLsid, permission);
|
485
|
|
486
|
authStatus =
|
487
|
xpath.evaluate("/resourceAuthorization/isAuthorized", new InputSource(new StringReader(authStatusXML)));
|
488
|
|
489
|
} catch (PropertyNotFoundException pnfe) {
|
490
|
throw new MetacatSchedulerException("WorkflowScheduler.authorizeRemoteSession - Could not "
|
491
|
+ "find property: " + pnfe.getMessage());
|
492
|
} catch (Exception e) {
|
493
|
throw new MetacatSchedulerException("WorkflowScheduler.authorizeRemoteSession - "
|
494
|
+ "general error when authorizing Session: " + e.getMessage());
|
495
|
}
|
496
|
|
497
|
|
498
|
return authStatus;
|
499
|
}
|
500
|
}
|