org.duracloud.sync.backup
Class ChangedListBackupManager

java.lang.Object
  org.duracloud.sync.backup.ChangedListBackupManager

All Implemented Interfaces:

java.lang.Runnable

public class ChangedListBackupManager
extends java.lang.Object
implements java.lang.Runnable

Manages the backing up of the changed list on a consistent schedule.

Field Summary

static int

SAVED_BACKUPS

Constructor Summary

ChangedListBackupManager(ChangedList changedList, java.io.File backupDir, long backupFrequency)

Method Summary

void	endBackup()
long	loadBackup() Attempts to reload the changed list from a backup file.
void	run() Runs the backup manager.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

SAVED_BACKUPS

public static final int SAVED_BACKUPS

See Also:

Constant Field Values

Constructor Detail

ChangedListBackupManager

public ChangedListBackupManager(ChangedList changedList,
                                java.io.File backupDir,
                                long backupFrequency)

Method Detail

loadBackup

public long loadBackup()

Attempts to reload the changed list from a backup file. If there are no backup files or the backup file cannot be read, returns -1, otherwise the backup file is loaded and the time the backup file was written is returned.

Returns:

the write time of the backup file, or -1 if no backup is available

run

public void run()

Runs the backup manager. Writes out files which are a backups of the changed list based on the set backup frequency. Retains SAVED_BACKUPS number of backup files, removes the rest.

Specified by:

run in interface java.lang.Runnable

endBackup

public void endBackup()