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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.models.LocalImageVersion;
import org.openslx.bwlp.sat.util.FileSystem;
import org.openslx.util.QuickTimer;
import org.openslx.util.QuickTimer.Task;
/**
* Delete old image versions (images that reached their expire time).
*/
public class DeleteOldImages implements Runnable {
private static final Logger LOGGER = Logger.getLogger(DeleteOldImages.class);
private static final DeleteOldImages instance = new DeleteOldImages();
private static long blockedUntil = 0;
/**
* Initialize the delete 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;
if (Maintenance.trySubmit(instance)) {
blockedUntil = System.currentTimeMillis() + TimeUnit.HOURS.toMillis(12);
}
}
}, TimeUnit.MINUTES.toMillis(5), TimeUnit.MINUTES.toMillis(5));
}
private DeleteOldImages() {
}
@Override
public void run() {
LOGGER.info("Looking for old image versions to delete");
List<LocalImageVersion> versions;
try {
versions = DbImage.getExpiringLocalImageVersions(0);
} catch (SQLException e) {
LOGGER.error("Will not be able to clean up old image versions");
return;
}
// Mark all as invalid. This will also trigger emails.
try {
DbImage.markValid(false, false, versions.toArray(new LocalImageVersion[versions.size()]));
} catch (SQLException e) {
LOGGER.error("Could not mark images to be deleted as invalid. Cleanup of old images failed.");
return;
}
// Delete them permanently only if they expired (at least) one day ago
int hardDeleteCount = 0;
final long hardDelete = (System.currentTimeMillis() / 1000) - 86400;
for (LocalImageVersion version : versions) {
if (version.expireTime < hardDelete) {
hardDeleteCount++;
FileSystem.deleteImageRelatedFiles(version);
try {
DbImage.deletePermanently(version);
} catch (SQLException e) {
// Logging done in method
}
}
}
LOGGER.info("Deletion done. Soft: " + versions.size() + ", hard: " + hardDeleteCount);
}
}
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