alarmmanager.java

The Funambol J2ME Mail Client aims to be a light, easy to use, free email client for J2ME devices.

/*
 * Copyright (C) 2006-2007 Funambol
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.funambol.mailclient.ui.controller;

import com.funambol.util.DateUtil;
import com.funambol.util.Log;
import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import javax.microedition.io.ConnectionNotFoundException;
import javax.microedition.io.PushRegistry;


/**
 * Singleton class to register/unregister alarms for polling
 */
public class AlarmManager {
    private static AlarmManager alarmManager;
    private static SyncTimerTask syncTimerTask;
    
    private static long alarmMillisecs;
    
    private static Timer aTimer;
    
    private static long alTime;
    
    
    /** Creates a new instance of OTAMessagesManager */
    private AlarmManager() {
    }
    
    /**
     * Unique instance for this class
     */
    public static AlarmManager getInstance() {
        if (alarmManager==null) {
            alarmManager = new AlarmManager();
        }
        return alarmManager;
    }
    
    /**
     * Set method for alarm milliseconds in case of registering alarm
     */
    public void setAlarm(long millisecs) {
        alarmMillisecs = millisecs;
    }
    
    /**
     * Schedule a new Alarm on PushRegistry for polling
     */
    public void scheduleMIDletAlarm() throws ClassNotFoundException, 
            ConnectionNotFoundException,
            SecurityException {
        cancelTimerTask();
        Date alarmDate = new Date(alarmMillisecs);
        Date newDate = updateConfig(alarmDate);
        long t = PushRegistry.registerAlarm(UIController.midlet.getClass().getName(),
                newDate.getTime());
        Log.info("New Alarm registered for " + newDate);
    }
    
    /**
     * Method to start a TimerTask when the midlet is running.
     * To be used in case of alarm within next 24 hours
     */
    public void startSyncTimerTask(int minutes) {
        syncTimerTask = new SyncTimerTask();
        Log.info("Scheduled SyncTimerTask in " + minutes + " minutes");
        aTimer = new Timer();
        long time = minutes*60000;
        setTimeOfAlarmSetting();
        aTimer.schedule(syncTimerTask, time, time);
    }
    
    /**
     * Method to start a TimerTask when the midlet is running.
     * To be used in case of periodic alarm in next 24 hours
     */
    public Date startSyncTimerTask(Date startDate, int days) {
        Date newDate = updateConfig(startDate);
        syncTimerTask = new SyncTimerTask();
        aTimer = new Timer();
        long time = days*24*60*60000;
        setTimeOfAlarmSetting();
        aTimer.schedule(syncTimerTask, newDate, time);
        Log.info("Scheduled SyncTimerTask in days: " + days + " starting since " + newDate);
        return newDate;
    }
    
    /**
     * Method to cancel a scheduled timertask
     */
    public void cancelTimerTask() {
        Log.info("Previous SyncTimerTask cancelling...");
        if (syncTimerTask!=null) {
            syncTimerTask.cancel();
        }
    }
    
    private Date updateConfig(final Date alarmDate) {
        Date now = new Date();
        DateUtil dateUtil = new DateUtil(alarmDate);
        boolean isAfter = dateUtil.isAfter(now);
        if (!isAfter) {
            Log.info("Alarm is before now");
            Date newDate = calcNewAlarmDate(alarmDate);
            UIController.mailClientConfig.setNextTimeAlarm(newDate.getTime());
            return newDate;
        } else {
            Log.info("Alarm is after now");
            UIController.mailClientConfig.setNextTimeAlarm(alarmDate.getTime());
            return alarmDate;
        }
    }
    
    private Date calcNewAlarmDate(final Date alarmDate) {
        long newMillisecs = 1440*60000 + alarmDate.getTime();
        Date newDate = new Date(newMillisecs);
        return newDate;
    }
    
    
    public void setTimeOfAlarmSetting() {
        Date date = new Date();
        long time = date.getTime();
        Log.info("New Alarm configured");
        alTime = time;
    }
    
    public long getTimeOfAlarmSetting() {
        return alTime;
    }
    
    public Date getAlarmStartDate(Date date) {
        Calendar calendarNow = Calendar.getInstance();
        Calendar calendarAlarm = Calendar.getInstance();
        calendarAlarm.setTime(date);
        calendarAlarm.set(
                Calendar.DAY_OF_MONTH, calendarNow.get(Calendar.DAY_OF_MONTH));
        calendarAlarm.set(Calendar.MONTH, calendarNow.get(Calendar.MONTH));
        calendarAlarm.set(Calendar.YEAR, calendarNow.get(Calendar.YEAR));
        return calendarAlarm.getTime();
    }
    
    public Date getDateFromMinutes(int minutes) {
        DateUtil dateUtil = new DateUtil();
        return dateUtil.addMinutes(minutes).getTime();
    }
}