X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.maintenance%2Fsrc%2Forg%2Fargeo%2Fmaintenance%2Fbackup%2Fvfs%2FSimpleBackupPurge.java;fp=org.argeo.maintenance%2Fsrc%2Forg%2Fargeo%2Fmaintenance%2Fbackup%2Fvfs%2FSimpleBackupPurge.java;h=042070f5c46feecdb145dc527e9aa0747ee76d0e;hb=2980adcfb0c8778426cd0f2176b86ba00e9697ab;hp=0000000000000000000000000000000000000000;hpb=40af4cc6795ab669ec9432d1444f0779f9594952;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.maintenance/src/org/argeo/maintenance/backup/vfs/SimpleBackupPurge.java b/org.argeo.maintenance/src/org/argeo/maintenance/backup/vfs/SimpleBackupPurge.java
new file mode 100644
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+++ b/org.argeo.maintenance/src/org/argeo/maintenance/backup/vfs/SimpleBackupPurge.java
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+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.maintenance.backup.vfs;
+
+import java.text.DateFormat;
+import java.time.Period;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.Date;
+import java.util.SortedMap;
+import java.util.TreeMap;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.commons.vfs2.FileObject;
+import org.apache.commons.vfs2.FileSystemManager;
+import org.apache.commons.vfs2.FileSystemOptions;
+import org.apache.commons.vfs2.Selectors;
+import org.argeo.maintenance.MaintenanceException;
+
+/** Simple backup purge which keeps backups only for a given number of days */
+public class SimpleBackupPurge implements BackupPurge {
+	private final static Log log = LogFactory.getLog(SimpleBackupPurge.class);
+
+	private Integer daysKept = 30;
+
+	@Override
+	public void purge(FileSystemManager fileSystemManager, String base, String name, DateFormat dateFormat,
+			FileSystemOptions opts) {
+		try {
+			ZonedDateTime nowDt = ZonedDateTime.now();
+			FileObject baseFo = fileSystemManager.resolveFile(base + '/' + name, opts);
+
+			SortedMap<ZonedDateTime, FileObject> toDelete = new TreeMap<ZonedDateTime, FileObject>();
+			int backupCount = 0;
+
+			// make sure base dir exists
+			baseFo.createFolder();
+
+			// scan backups and list those which should be deleted
+			for (FileObject backupFo : baseFo.getChildren()) {
+				String backupName = backupFo.getName().getBaseName();
+				Date backupDate = dateFormat.parse(backupName);
+				backupCount++;
+				ZonedDateTime backupDt = ZonedDateTime.ofInstant(backupDate.toInstant(), ZoneId.systemDefault());
+				Period sinceThen = Period.between(backupDt.toLocalDate(), nowDt.toLocalDate());
+				// new Period(backupDt, nowDt);
+				int days = sinceThen.getDays();
+				// int days = sinceThen.getMinutes();
+				if (days > daysKept) {
+					toDelete.put(backupDt, backupFo);
+				}
+			}
+
+			if (toDelete.size() != 0 && toDelete.size() == backupCount) {
+				// all backups would be deleted
+				// but we want to keep at least one
+				ZonedDateTime lastBackupDt = toDelete.firstKey();
+				FileObject keptFo = toDelete.remove(lastBackupDt);
+				log.warn("Backup " + keptFo + " kept although it is older than " + daysKept + " days.");
+			}
+
+			// delete old backups
+			for (FileObject backupFo : toDelete.values()) {
+				backupFo.delete(Selectors.SELECT_ALL);
+				if (log.isDebugEnabled())
+					log.debug("Deleted backup " + backupFo);
+			}
+		} catch (Exception e) {
+			throw new MaintenanceException("Could not purge previous backups", e);
+		}
+
+	}
+
+}