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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.metacat.workflow;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.SQLException;
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import java.util.Hashtable;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.ServletException;
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import org.apache.log4j.Logger;
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import edu.ucsb.nceas.metacat.DBTransform;
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import edu.ucsb.nceas.metacat.properties.PropertyService;
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import edu.ucsb.nceas.metacat.scheduler.MetacatSchedulerException;
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import edu.ucsb.nceas.metacat.shared.MetacatUtilException;
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import edu.ucsb.nceas.metacat.util.ErrorSendingErrorException;
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import edu.ucsb.nceas.metacat.util.MetacatUtil;
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import edu.ucsb.nceas.metacat.util.ResponseUtil;
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import edu.ucsb.nceas.metacat.util.RequestUtil;
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import edu.ucsb.nceas.utilities.PropertyNotFoundException;
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/**
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* @author daigle
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*
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*/
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public class WorkflowSchedulerClient {
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private static WorkflowSchedulerClient WorkflowSchedulerClient = null;
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private static Logger logMetacat = Logger.getLogger(WorkflowSchedulerClient.class);
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/**
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* private constructor since this is a singleton
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*/
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private WorkflowSchedulerClient() {}
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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 WorkflowSchedulerClient getInstance() {
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if (WorkflowSchedulerClient == null) {
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WorkflowSchedulerClient = new WorkflowSchedulerClient();
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}
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return WorkflowSchedulerClient;
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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, String username,
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String[] groups) throws MetacatSchedulerException {
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try {
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params.put("action", new String[] { "scheduleWorkflow" });
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params.put("sessionid", new String[] { RequestUtil.getSessionData(request).getId() });
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String schedulerUrl = PropertyService.getProperty("workflowScheduler.url");
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String result = RequestUtil.get(schedulerUrl, params);
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String forwardTos[] = params.get("forwardto");
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if (forwardTos == null || forwardTos.length == 0) {
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ResponseUtil.sendSuccessXML(response, result);
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} else {
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String forwardTo = forwardTos[0];
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String qformat = null;
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String qformats[] = params.get("qformat");
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if (qformats == null || qformats.length == 0) {
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qformat = MetacatUtil.XMLFORMAT;
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} else {
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qformat = qformats[0];
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}
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String destination = "/style/skins/" + qformat + "/" + forwardTo;
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RequestUtil.forwardRequest(request, response, destination, params);
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}
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} catch (PropertyNotFoundException pnfe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.scheduleJob - "
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+ "property error when scheduling job: " + pnfe.getMessage());
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} catch (MetacatUtilException mue) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.scheduleJob - "
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+ "Service issue when scheduling job: " + mue.getMessage());
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} catch (IOException ioe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.scheduleJob - "
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+ "I/O issue when scheduling job: " + ioe.getMessage());
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} catch (ServletException se) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.scheduleJob - "
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+ "Servlet issue when scheduling job: " + se.getMessage());
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} catch (ErrorSendingErrorException esee) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.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,
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String[] groups) throws MetacatSchedulerException {
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try {
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params.put("action", new String[] { "unscheduleWorkflow" });
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params.put("sessionid", new String[] { RequestUtil.getSessionData(request).getId() });
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String schedulerUrl = PropertyService.getProperty("workflowScheduler.url");
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String result = RequestUtil.get(schedulerUrl, params);
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String forwardTos[] = params.get("forwardto");
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if (forwardTos == null || forwardTos.length == 0) {
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ResponseUtil.sendSuccessXML(response, result);
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} else {
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String forwardTo = forwardTos[0];
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String qformat = null;
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String qformats[] = params.get("qformat");
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if (qformats == null || qformats.length == 0) {
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qformat = MetacatUtil.XMLFORMAT;
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} else {
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qformat = qformats[0];
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}
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String destination = "/style/skins/" + qformat + "/" + forwardTo;
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RequestUtil.forwardRequest(request, response, destination, params);
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}
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} catch (PropertyNotFoundException pnfe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.unScheduleJob - "
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+ "property error when unscheduling job: " + pnfe.getMessage());
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} catch (MetacatUtilException mue) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.unScheduleJob - "
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+ "Service issue when unscheduling job: " + mue.getMessage());
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} catch (IOException ioe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.unScheduleJob - "
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+ "I/O issue when unscheduling job: " + ioe.getMessage());
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} catch (ServletException se) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.unScheduleJob - "
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+ "Servlet issue when unscheduling job: " + se.getMessage());
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} catch (ErrorSendingErrorException esee) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.unScheduleJob - "
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+ "Issue sending error when unscheduling job: " + esee.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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params.put("action", new String[] { "rescheduleWorkflow" });
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params.put("sessionid", new String[] { RequestUtil.getSessionData(request).getId() });
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String schedulerUrl = PropertyService.getProperty("workflowScheduler.url");
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String result = RequestUtil.get(schedulerUrl, params);
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String forwardTos[] = params.get("forwardto");
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if (forwardTos == null || forwardTos.length == 0) {
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ResponseUtil.sendSuccessXML(response, result);
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} else {
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String forwardTo = forwardTos[0];
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String qformat = null;
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String qformats[] = params.get("qformat");
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if (qformats == null || qformats.length == 0) {
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qformat = MetacatUtil.XMLFORMAT;
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} else {
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qformat = qformats[0];
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}
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String destination = "/style/skins/" + qformat + "/" + forwardTo;
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RequestUtil.forwardRequest(request, response, destination, params);
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}
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} catch (PropertyNotFoundException pnfe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.reScheduleJob - "
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+ "property error when rescheduling job: " + pnfe.getMessage());
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} catch (MetacatUtilException mue) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.reScheduleJob - "
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+ "Service issue when rescheduling job: " + mue.getMessage());
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} catch (IOException ioe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.reScheduleJob - "
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+ "I/O issue when rescheduling job: " + ioe.getMessage());
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} catch (ServletException se) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.reScheduleJob - "
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+ "Servlet issue when rescheduling job: " + se.getMessage());
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} catch (ErrorSendingErrorException esee) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.reScheduleJob - "
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+ "Issue sending error 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,
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String[] groups) throws MetacatSchedulerException {
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try {
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params.put("action", new String[] { "deleteScheduledWorkflow" });
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params.put("sessionid", new String[] { RequestUtil.getSessionData(request).getId() });
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String schedulerUrl = PropertyService.getProperty("workflowScheduler.url");
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String result = RequestUtil.get(schedulerUrl, params);
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String forwardTos[] = params.get("forwardto");
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if (forwardTos == null || forwardTos.length == 0) {
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ResponseUtil.sendSuccessXML(response, result);
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} else {
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String forwardTo = forwardTos[0];
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String qformat = null;
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String qformats[] = params.get("qformat");
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if (qformats == null || qformats.length == 0) {
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qformat = MetacatUtil.XMLFORMAT;
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} else {
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qformat = qformats[0];
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}
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String destination = "/style/skins/" + qformat + "/" + forwardTo;
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RequestUtil.forwardRequest(request, response, destination, params);
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}
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298
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} catch (PropertyNotFoundException pnfe) {
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throw new MetacatSchedulerException("WorkflowSchedulerClient.deleteJob - "
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300
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+ "property error when deleting job: " + pnfe.getMessage());
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301
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} catch (MetacatUtilException mue) {
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302
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throw new MetacatSchedulerException("WorkflowSchedulerClient.deleteJob - "
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303
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+ "Service issue when deleting job: " + mue.getMessage());
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304
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} catch (IOException ioe) {
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305
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throw new MetacatSchedulerException("WorkflowSchedulerClient.deleteJob - "
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306
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+ "I/O issue when deleting job: " + ioe.getMessage());
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307
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} catch (ServletException se) {
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308
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throw new MetacatSchedulerException("WorkflowSchedulerClient.deleteJob - "
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309
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+ "Servlet issue when deleting job: " + se.getMessage());
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310
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} catch (ErrorSendingErrorException esee) {
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311
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throw new MetacatSchedulerException("WorkflowSchedulerClient.deleteJob - "
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312
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+ "Issue sending error when deleting job: " + esee.getMessage());
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313
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}
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314
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}
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315
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316
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/**
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317
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* get job information for a given workflow in xml format
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318
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*
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319
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* @param request
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320
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* the servlet request object
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321
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* @param response
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322
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* the servlet response object
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323
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* @param params
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324
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* the request parameters
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325
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* @param username
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326
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* the user
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327
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* @param groups
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328
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* the user's group
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329
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*/
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330
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public void getJobs(HttpServletRequest request, HttpServletResponse response,
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331
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Hashtable<String, String[]> params, String username,
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332
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String[] groups) throws MetacatSchedulerException {
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|
333
|
|
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334
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try {
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335
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params.put("action", new String[] { "getScheduledWorkflow" });
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336
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337
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String schedulerUrl = PropertyService.getProperty("workflowScheduler.url");
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338
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String result = RequestUtil.get(schedulerUrl, params);
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339
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340
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String qformats[] = params.get("qformat");
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341
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String qformat = null;
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342
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if (qformats == null || qformats.length == 0) {
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343
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qformat = MetacatUtil.XMLFORMAT;
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344
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} else {
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345
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qformat = qformats[0];
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346
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}
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347
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348
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PrintWriter out = response.getWriter();
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349
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350
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DBTransform dbt = new DBTransform();
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351
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dbt.transformXMLDocument(result,"-//NCEAS//scheduledWorkflowResultset//EN", "-//W3C//HTML//EN",
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352
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qformat, out, params, null);
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353
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354
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} catch (PropertyNotFoundException pnfe) {
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355
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throw new MetacatSchedulerException("WorkflowSchedulerClient.getJobs - "
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356
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+ "Property error when getting jobs for workflow: " + pnfe.getMessage());
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|
357
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} catch (IOException ioe) {
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358
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throw new MetacatSchedulerException("WorkflowSchedulerClient.getJobs - "
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359
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+ "I/O error when getting jobs for workflow: " + ioe.getMessage());
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|
360
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} catch (MetacatUtilException mue) {
|
|
361
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throw new MetacatSchedulerException("WorkflowSchedulerClient.getJobs - "
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362
|
+ "Metacat utility error when getting jobs for workflow: " + mue.getMessage());
|
|
363
|
} catch (ClassNotFoundException cnfe) {
|
|
364
|
throw new MetacatSchedulerException("WorkflowSchedulerClient.getJobs - "
|
|
365
|
+ "Error finding class when getting jobs for workflow: " + cnfe.getMessage());
|
|
366
|
} catch (SQLException sqle) {
|
|
367
|
throw new MetacatSchedulerException("WorkflowSchedulerClient.getJobs - "
|
|
368
|
+ "SQL error when getting jobs for workflow: " + sqle.getMessage());
|
|
369
|
}
|
|
370
|
}
|
|
371
|
}
|