birthday.java

Java的wap push

package push;

import java.util.Vector;
import java.util.Calendar;
import java.text.SimpleDateFormat;

/**
 * Birthday checker class.
 * 
 * @version 1.0
 * @since 1.0
 * @see Runnable
 */
public final class Birthday implements Runnable {

	private final PushInitiator pusher;
	private final String url;
	private static final String messageContent = "We hear you're having a birthday soon! We would like to invite you to celebrate it in our zoo. "
			+ "A refreshment is  on the house at the Safari restaurant.";
	private final String addressType;

	/**
	 * Creates a new <code>Birthday</code> instance.
	 * 
	 * @param pusher
	 *            a <code>PushInitiator</code> value
	 * @param url
	 *            a <code>String</code> value
	 * @param addressType
	 *            a <code>String</code> value
	 */
	public Birthday(PushInitiator pusher, String url, String addressType) {
		this.pusher = pusher;
		this.url = url;
		this.addressType = addressType;
	}

	/**
	 * A birthday checker thread sends push messages to users about approaching
	 * birthday. The message is sent 1 to 14 days before the birthday.
	 */
	public void run() {
		String message = PushInitiator.createSiMessage(url, null, null, null,
				null, messageContent);
		while (true) {
			try {
				Vector users = User.getUsersOnline();
				for (int i = 0; i < users.size(); i++) {
					User user = (User) users.get(i);
					String name = user.getName();
					String dob = user.getDob();
					Object notified = user.getProperty("birthdayNotified");
					int days = numberOfDaysToBirthday(dob);
					if (notified == null && days >= 1 && days <= 14) {
						String address = user.getAddress(addressType);
						if (address != null && !address.trim().equals("")) {

							try {
								pusher.sendPushMessage(address, addressType,
										message, PushService.SI_CONTENT_TYPE);
							} catch (Exception ee) {
							}
							user.setProperty("birthdayNotified", new Long(
									System.currentTimeMillis()));
						}
					}
				}

			} catch (Exception e) {
				System.err.println(e);
			}
			try {
				Thread.sleep(60000); // 1 min
			} catch (InterruptedException e) {
			}
		}
	}

	/**
	 * Calculates the number of days to birthday on the basis of date of birth
	 * given in format "yyyy.mm.dd"
	 * 
	 * @param dob
	 *            a <code>String</code> value
	 * @return an <code>int</code> value
	 */
	private static int numberOfDaysToBirthday(String dob) {
		SimpleDateFormat s = new SimpleDateFormat("yyyy.MM.dd");
		final long numberOfMillisecondsPerDay = 1000 * 60 * 60 * 24;
		try {
			java.util.Date d = s.parse(dob);
			Calendar c1 = Calendar.getInstance();
			c1.setTime(d);
			Calendar c2 = Calendar.getInstance();
			c1.set(Calendar.YEAR, c2.get(Calendar.YEAR));
			int d1 = c1.get(Calendar.DAY_OF_YEAR);
			int d2 = c2.get(Calendar.DAY_OF_YEAR); // current day
			if (d2 > d1) { // birthday next year
				c1.roll(Calendar.YEAR, true); // set next birthday
				d1 = c1.get(Calendar.DAY_OF_YEAR);
			}
			return (int) ((c1.getTime().getTime() - c2.getTime().getTime()) / numberOfMillisecondsPerDay);
		} catch (Exception e) {
			System.err.println(e);
		}
		return -1;
	}

}