Java tutorial
/******************************************************************************* * ***** BEGIN LICENSE BLOCK Version: MPL 1.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for * the specific language governing rights and limitations under the License. * * The Original Code is the OpenCustomer CRM. * * The Initial Developer of the Original Code is Thomas Bader (Bader & Jene * Software-Ingenieurbro). Portions created by the Initial Developer are * Copyright (C) 2005 the Initial Developer. All Rights Reserved. * * Contributor(s): Thomas Bader <thomas.bader@bader-jene.de> * Felix Breske <felix.breske@bader-jene.de> * * ***** END LICENSE BLOCK ***** */ package org.opencustomer.connector.scheduling; import java.io.File; import java.lang.reflect.Constructor; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Iterator; import java.util.List; import javax.mail.internet.AddressException; import org.apache.log4j.Logger; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import org.dom4j.Node; import org.dom4j.io.SAXReader; import org.opencustomer.connector.mail.exception.NoValidSenderException; import org.opencustomer.connector.mail.messages.JobReminderMail; import org.opencustomer.connector.mail.messages.EventReminderMail; import org.opencustomer.connector.scheduling.jobs.MailJob; import org.opencustomer.db.dao.crm.JobDAO; import org.opencustomer.db.dao.system.UserDAO; import org.opencustomer.db.vo.crm.JobVO; import org.opencustomer.db.vo.system.UserVO; import org.opencustomer.util.configuration.UserConfiguration; import org.opencustomer.webapp.Settings; import org.opencustomer.webapp.module.calendar.util.EventBean; import org.opencustomer.webapp.module.calendar.util.EventBeanCalculator; import com.jtheory.jdring.AlarmEntry; import com.jtheory.jdring.AlarmListener; import com.jtheory.jdring.AlarmManager; import com.jtheory.jdring.PastDateException; /** * This class manages a single instance of AlarmManager, and loads alarm jobs from a xml file, or from the opencustomer databse. * * @author fbreske * @see com.jtheory.jdring.AlarmManager * */ public class SchedulingManager { private static Logger log = Logger.getLogger(SchedulingManager.class); private AlarmManager alarmManager; private static SchedulingManager schedulingManager; public SchedulingManager() { alarmManager = new AlarmManager(); if (log.isDebugEnabled()) log.debug("stating alarm manager"); } public static SchedulingManager getInstance() { if (schedulingManager == null) schedulingManager = new SchedulingManager(); return schedulingManager; } /** * Returns the managed instance of AlarmManager * @return instance of AlarmManager * @see com.jtheory.jdring.AlarmManager */ public AlarmManager getAlarmManager() { return alarmManager; } /** * Reads alarm jobs from a xml configuration file, and adds the jobs to the AlarmManager. * @param file xml configuration file. */ public void readXMLJobs(File file) { SAXReader reader = new SAXReader(); Document document; try { document = reader.read(file); } catch (DocumentException e1) { log.warn("error parsing file " + file.getName()); return; } Element root = document.getRootElement(); Iterator iter = root.elementIterator(); while (iter.hasNext()) { Element element = (Element) iter.next(); String type = element.valueOf("@type"); String name = element.valueOf("@name"); String className = element.valueOf("@class"); AlarmListener alarm = null; try { Class cl = Class.forName(className); Constructor b = cl.getConstructor(new Class[] {}); alarm = (AlarmListener) b.newInstance(new Object[] {}); } catch (Exception e) { log.warn("unable to get class for event: " + name, e); } if (alarm != null && type.equals("DATE")) { Node dateNode = root.selectSingleNode("//events/event/date"); if (dateNode != null && dateNode.getText() != null) { SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy HH:mm"); try { AlarmEntry alarmEntry = new AlarmEntry(name, sdf.parse(dateNode.getText()), alarm); alarmEntry.setRingInNewThead(); if (log.isDebugEnabled()) log.debug("adding event: " + alarmEntry); alarmManager.addAlarm(alarmEntry); } catch (ParseException e) { log.warn("unparseable date format of event: " + name, e); } catch (PastDateException e) { if (log.isInfoEnabled()) log.info("ignoring old event: " + name); } } } else if (alarm != null && type.equals("DELAY")) { Node minuteNode = root.selectSingleNode("//events/event/minute"); if (minuteNode != null && minuteNode.getText() != null) { int minute = Integer.parseInt(minuteNode.getText()); try { AlarmEntry alarmEntry = new AlarmEntry(name, minute, true, alarm); alarmEntry.setRingInNewThead(); if (log.isDebugEnabled()) log.debug("adding event: " + alarmEntry); alarmManager.addAlarm(alarmEntry); } catch (PastDateException e) { if (log.isInfoEnabled()) log.info("ignoring old event: " + name); ; } } } else if (alarm != null && type.equals("CRON")) { //Minuten int minutes[] = getChildEntries(element, "minute"); //Stunden int hours[] = getChildEntries(element, "hour"); //Tag des Monats int dayOfMonth[] = getChildEntries(element, "dayofmonth"); //Monat int months[] = getChildEntries(element, "month"); //Tag der Woche int dayOfWeek[] = getChildEntries(element, "dayofweek"); //Jahr Node yearNode = root.selectSingleNode("//events/event/year"); int year = -1; if (yearNode != null && yearNode.getText() != null) year = Integer.parseInt(yearNode.getText()); try { AlarmEntry alarmEntry = new AlarmEntry(name, minutes, hours, dayOfMonth, months, dayOfWeek, year, alarm); alarmEntry.setRingInNewThead(); if (log.isDebugEnabled()) log.debug("adding event: " + alarmEntry); alarmManager.addAlarm(alarmEntry); } catch (PastDateException e) { if (log.isInfoEnabled()) log.info("ignoring old event: " + name); } } } } /** * This method reads for all users the job and event jobs for the time period. * Creates for every job a ReminderMail and a MailJob. * @param startDate the start date of the time period * @param endDate the end date of the time period */ public void loadReminderJobsfromDB(Date startDate, Date endDate) { if (!Settings.getInstance().isMailReminderEnabled()) { if (log.isDebugEnabled()) log.debug("reminder mail disabled"); return; } if (log.isDebugEnabled()) { SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy HH:mm"); log.debug("loading jobs from: " + sdf.format(startDate.getTime()) + " to " + sdf.format(endDate.getTime())); } SchedulingManager manager = SchedulingManager.getInstance(); List<UserVO> users = new UserDAO().getAll(); for (UserVO user : users) { if (log.isDebugEnabled()) log.debug("loading jobs for: " + user.getUserName()); UserConfiguration userConf = new UserConfiguration(user); EventBeanCalculator calc = new EventBeanCalculator(user.getCalendar(), startDate, endDate); calc.setWithReminderDate(true); List<EventBean> eventBeanList = calc.getEventBeans(); if (log.isDebugEnabled()) log.debug(eventBeanList.size() + " event jobs found"); for (EventBean event : eventBeanList) { if (event.getReminderDate() != null && event.getReminderDate().before(endDate) && event.getReminderDate().after(startDate)) { if (log.isDebugEnabled()) log.debug("generating job for event: " + event); EventReminderMail reminderMail; try { reminderMail = new EventReminderMail(); } catch (AddressException e1) { log.warn("cannot create reminder mail, incorrect sender address", e1); return; } reminderMail.setEvent(event.getEvent()); try { reminderMail.setUser(user); MailJob mailJob = new MailJob(reminderMail); for (Object obj : manager.getAlarmManager().getAllAlarms()) { AlarmEntry alarmEntry = (AlarmEntry) obj; String name; if (event.getRecurrenceNumber() != null) name = "EVENT" + event.getEvent().getId() + "." + event.getRecurrenceNumber(); else name = "EVENT" + event.getEvent().getId(); if (alarmEntry.getName().equals(name)) { if (log.isDebugEnabled()) log.debug("removing mail job for: " + event); manager.getAlarmManager().removeAlarm(alarmEntry); } } try { if (log.isInfoEnabled()) log.info("adding mailJob for: " + event); String name; if (event.getRecurrenceNumber() != null) name = "EVENT" + event.getEvent().getId() + "." + event.getRecurrenceNumber(); else name = "EVENT" + event.getEvent().getId(); AlarmEntry alarmEntry = new AlarmEntry(name, event.getReminderDate(), mailJob); alarmEntry.setRingInNewThead(); manager.getAlarmManager().addAlarm(alarmEntry); } catch (PastDateException e) { if (log.isInfoEnabled()) log.info("ignoring old event alarm: " + event); } } catch (NoValidSenderException e) { log.warn("no person for user: " + user); } } else { if (log.isInfoEnabled()) log.info("no reminder date of old reminder date for: " + event); } } List<JobVO> jobs = new JobDAO().getByUser(user, startDate, endDate); if (log.isDebugEnabled()) log.debug(jobs.size() + " job jobs found"); for (JobVO job : jobs) { if (log.isDebugEnabled()) log.debug("generating jobs for job: " + job); JobReminderMail reminderMail; try { reminderMail = new JobReminderMail(); } catch (AddressException e1) { log.warn("cannot create reminder mail, incorrect sender address", e1); return; } reminderMail.setJob(job); try { reminderMail.setUser(user); MailJob mailJob = new MailJob(reminderMail); for (Object obj : manager.getAlarmManager().getAllAlarms()) { AlarmEntry alarmEntry = (AlarmEntry) obj; if (alarmEntry.getName().equals("EVENT" + job.getId())) { if (log.isDebugEnabled()) log.debug("removing mail job for: " + job); manager.getAlarmManager().removeAlarm(alarmEntry); } } try { if (log.isInfoEnabled()) log.info("adding mailJob for: " + job); Calendar reminderDate = GregorianCalendar.getInstance(); reminderDate.setTime(job.getDueDate()); reminderDate.add(Calendar.MINUTE, -1 * Settings.getInstance().getAlarmBeforeJob()); manager.getAlarmManager().addAlarm("EVENT" + job.getId(), reminderDate.getTime(), mailJob); } catch (PastDateException e) { if (log.isInfoEnabled()) log.info("ignoring old event alarm: " + job); } } catch (NoValidSenderException e1) { log.warn("no person for user: " + job.getAssignedUser()); } } } } private int[] getChildEntries(Element parent, String s) { List entryList = parent.selectNodes(s); int dates[] = new int[entryList.size()]; if (entryList.size() == 0) { dates = new int[1]; dates[0] = -1; } else { int i = 0; for (Object tmp : entryList) { Element element2 = (Element) tmp; dates[i++] = Integer.parseInt(element2.getText()); } } return dates; } }