From cb84995967e523443b2590f169af0694e3107c90 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Sat, 22 Aug 2015 23:04:10 +0200
Subject: [server] Work on version deletion/change/validity logic

---
 .../bwlp/sat/maintenance/DeleteOldImages.java      | 49 ++++++++++++++++++++--
 1 file changed, 45 insertions(+), 4 deletions(-)

(limited to 'dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/maintenance/DeleteOldImages.java')

diff --git a/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/maintenance/DeleteOldImages.java b/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/maintenance/DeleteOldImages.java
index 90e7e80d..9a308dcd 100644
--- a/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/maintenance/DeleteOldImages.java
+++ b/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/maintenance/DeleteOldImages.java
@@ -1,14 +1,16 @@
 package org.openslx.bwlp.sat.maintenance;
 
 import java.sql.SQLException;
-import java.util.HashSet;
 import java.util.List;
-import java.util.Set;
+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.fileserv.FileServer;
+import org.openslx.util.QuickTimer;
+import org.openslx.util.QuickTimer.Task;
 
 /**
  * Delete old image versions (images that reached their expire time).
@@ -16,9 +18,41 @@ import org.openslx.bwlp.sat.fileserv.FileServer;
 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);
@@ -31,16 +65,23 @@ public class DeleteOldImages implements Runnable {
 			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
-		Set<String> deleteVersionIds = new HashSet<>();
+		int hardDeleteCount = 0;
 		final long hardDelete = (System.currentTimeMillis() / 1000) - 86400;
 		for (LocalImageVersion version : versions) {
 			if (version.expireTime < hardDelete) {
-				deleteVersionIds.add(version.imageVersionId);
+				hardDeleteCount++;
 				FileServer.composeAbsolutePath(version).delete();
+				try {
+					DbImage.deletePermanently(version);
+				} catch (SQLException e) {
+					// Logging done in method
+				}
 			}
 		}
+		LOGGER.info("Deletion done. Soft: " + versions.size() + ", hard: " + hardDeleteCount);
 	}
 
 }
-- 
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