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package org.openslx.bwlp.sat.maintenance;
import java.sql.SQLException;
import java.util.List;
import java.util.concurrent.TimeUnit;
import org.apache.log4j.Logger;
import org.joda.time.DateTime;
import org.openslx.bwlp.sat.database.mappers.DbImage;
import org.openslx.bwlp.sat.database.mappers.DbLecture;
import org.openslx.bwlp.sat.database.models.LocalImageVersion;
import org.openslx.bwlp.sat.mail.MailGenerator;
import org.openslx.bwlp.sat.util.FileSystem;
import org.openslx.bwlp.thrift.iface.LectureSummary;
import org.openslx.util.QuickTimer;
import org.openslx.util.QuickTimer.Task;
import org.openslx.util.Util;
public class SendExpireWarning implements Runnable {
private static final Logger LOGGER = Logger.getLogger(SendExpireWarning.class);
private static final SendExpireWarning instance = new SendExpireWarning();
private static long blockedUntil = 0;
/**
* Initialize the task. This schedules a timer that runs
* every 5 minutes. If the hour of day reaches 3, it will fire
* the task, and block it from running for the next 12 hours.
*/
public synchronized static void init() {
if (blockedUntil != 0)
return;
blockedUntil = 1;
QuickTimer.scheduleAtFixedRate(new Task() {
@Override
public void fire() {
if (blockedUntil > System.currentTimeMillis())
return;
DateTime now = DateTime.now();
if (now.getHourOfDay() != 3 || now.getMinuteOfHour() > 15)
return;
start();
}
}, TimeUnit.MINUTES.toMillis(4), TimeUnit.MINUTES.toMillis(5));
}
public synchronized static void start() {
if (blockedUntil > System.currentTimeMillis())
return;
if (Maintenance.trySubmit(instance)) {
blockedUntil = System.currentTimeMillis() + TimeUnit.HOURS.toMillis(12);
}
}
@Override
public void run() {
checkImages();
checkLectures();
}
private void checkLectures() {
List<LectureSummary> lectures;
try {
lectures = DbLecture.getExpiringLectures(15);
} catch (SQLException e) {
LOGGER.warn("Could not get list of expiring lectures; skipping warning mails");
return;
}
LOGGER.info("Scanning expiring lectures to send mails to users");
final long now = Util.unixTime();
for (LectureSummary lecture : lectures) {
final int days = (int) ((lecture.endTime - now) / 86400);
if ((lecture.isEnabled && (days == 14 || days == 1)) || (days == 7)) {
LOGGER.debug(lecture.lectureName + " expires in " + days);
MailGenerator.sendLectureExpiringReminder(lecture, days);
}
}
}
private void checkImages() {
if (!FileSystem.isStorageMounted()) {
LOGGER.warn("Skipping sending warning mails about expiring images - storage seems unmounted");
return;
}
// Get all images that expire in 15 days or less
List<LocalImageVersion> versions;
try {
versions = DbImage.getExpiringLocalImageVersions(15);
} catch (SQLException e) {
LOGGER.warn("Could not determine expiring versions; skipping warning mails");
return;
}
LOGGER.info("Scanning for expiring images to send mails to users");
// Send reminder on certain days
final long now = Util.unixTime();
for (LocalImageVersion version : versions) {
final int days = (int) ((version.expireTime - now) / 86400);
boolean mailNormal = (version.isValid && (days == 14 || days == 7 || days == 1))
|| (!version.isValid && days == 3);
boolean mailForced = version.isValid && days == 1;
if (mailNormal || mailForced) {
LOGGER.debug(version.imageVersionId + " expires in " + days);
MailGenerator.sendImageDeletionReminder(version, days, mailForced);
}
}
}
}
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