def periodic_backup(self):
time.sleep(60)
if not self.own_start is None:
backup = {}
self.write_lock.acquire()
records = shelve.open(self.db)
for k in records.keys():
k_key = hash_util.Key(k)
if hash_util.hash_between_right_inclusive(k_key,self.own_start, self.own_end):
backup[k] = records[k]
size = len(backup.keys())
if size > 0:
newmsg = Database_Backup_Message(self.owner, backup)
self.send_message(newmsg,node.predecessor)
records.close()
self.write_lock.release()
def change_in_responsibility(self,new_pred_key, my_key):
self.own_start = new_pred_key
self.own_end = my_key
backup = {}
self.write_lock.acquire()
records = shelve.open(self.db)
for k in records.keys():
k_key = hash_util.Key(k)
if not hash_util.hash_between_right_inclusive(k_key,self.own_start, self.own_end):
backup[k] = records[k]
size = len(backup.keys())
if size > 0:
newmsg = Database_Backup_Message(self.owner, backup)
self.send_message(newmsg,node.predecessor)
records.close()
self.write_lock.release()