def check_bigger_replication_degree(self, message, addr):
data = Data(self.db_path)
file_id = message.split(" ")[2]
chunk_number = message.split(" ")[3]
replication_degree = data.get_chunk_replication_degree(file_id, chunk_number)
minimum_replication_degree = data.get_chunk_minimum_replication_degree(file_id, chunk_number)
if (data.chunk_owner(file_id) and replication_degree >= minimum_replication_degree and not data.chunk_have_replication_host(file_id, chunk_number, addr[0])):
print_message("Sending a chunk delete to "+str(addr[0])+" because the replication degree was already enough")
message="deletechunk " + file_id + " "+ chunk_number
self.shell.sendto(message, (addr[0], SHELL_PORT))
return True
return False
def handle_request(self, message,addr):
operation=message.split(" ")[0].strip(' \t\n\r')
message=message.strip(' \t\n\r')
if (operation == "PUTCHUNK"):
data = Data(self.db_path)
file_id=message.split(" ")[2]
chunk_number=message.split(" ")[3]
now=datetime.now()
try:
body = message.split(CRLF+CRLF)[1]
except:
print_message("Invalid message from "+str(addr))
if(len(body)<2):
print_message("The PUTCHUNK split failed")
return False
can_store=True
if(data.chunk_owner(file_id)):
can_store=False
if((file_id+chunk_number) in self.reject_putchunks and now<self.reject_putchunks[file_id+chunk_number]):
can_store=False
if ((self.backup_size - self.check_directory_size(self.backup_dir)) <= len(body)):
can_store=False
if(can_store):
self.backup_chunk(message)
else:
print_message("PUTCHUNK rejected")
elif(operation == "GETCHUNK"):
self.create_restore_subscription(message)
self.get_and_send_chunk(message)
elif(operation == "CHUNK"):
print message.split(CRLF+CRLF)[0]
self.save_chunk_to_restore(message)
elif(operation=="DELETE"):
self.can_send_removed=False
self.delete_chunks(message)
time.sleep(1)
self.can_send_removed=True
elif(operation=="DELETE2"):
self.can_send_removed=False
self.delete_chunks(message)
file_id=message.split(" ")[1].strip(CRLF+CRLF)
self.mc.sendto("deleted "+str(file_id),(addr[0],SHELL_PORT))
time.sleep(1)
self.can_send_removed=True
elif(operation=="STORED"):
if (not self.check_bigger_replication_degree(message, addr)):
self.increment_chunk_replication_degree(message,addr)
elif(operation=="REMOVED"):
self.update_chunk_replication_degree(message,addr)
