def display_philosopher_states(self, data):
display_state = []
action = values.unserialize(data[0]) #[philosopher_id, action]
philosopher_id = action[0]
state = action[1]
state_string = ""
if state == values.STATE_THINKING:
state_string = values.STATE_THINKING_STRING
elif state == values.STATE_WAITING:
state_string = values.STATE_WAITING_STRING
elif state == values.STATE_EATING:
state_string = values.STATE_EATING_STRING
current_time = datetime.datetime.now().strftime(
values.DISPLAY_TIME_FORMAT)
display_state.append(current_time)
for i in range(len(values.forks)):
if i == philosopher_id:
display_state.append(state_string)
else:
display_state.append("-" * len(values.forks))
string1 = ""
for i in display_state:
string1 += " " * values.DISPLAY_COLUMN_OFFSET + str(i)
print(string1)
def receive_data(self, connection):
while self.is_running:
try:
data = connection.recv(values.DATA_SIZE)
if data:
print("data from philosopher : " +
str(values.unserialize(data)))
philosopher_request = values.unserialize(data)
if philosopher_request[1] == values.ACTION_PICK_FORK:
is_successful = self.pickfork(philosopher_request,
connection)
if not is_successful:
break
elif philosopher_request[1] == values.ACTION_DROP_FORK:
self.dropfork(philosopher_request, connection)
break
except socket.error as e:
print("error getting data : " + str(e))
#connection.close()
connection.close()
def pickfork(self, philosopher_request, connection):
if self.is_dirty:
sent_data = values.serialize([
self.id, philosopher_request[0], values.ACTION_PICK_FORK,
values.ACTION_FAIL
])
connection.send(sent_data)
print("data received at philosopher : ",
str(values.unserialize(sent_data)))
return False
else: # If fork is clean/not being used
self.is_dirty = True
self.current_philosopher = philosopher_request[0]
sent_data = self.serialize([
self.id, self.current_philosopher, values.ACTION_PICK_FORK,
values.ACTION_SUCCESS
])
connection.send(sent_data)
print("data received at philosopher : ",
str(values.unserialize(sent_data)))
return True
def get_fork1(self,forkl):
while self.is_running:
try:
time.sleep(1)
try:
lfork = TCPClient(forkl[0],forkl[1])
lfork.connect()
except socket.error as e:
print("socekt error lf =",e)
lfork.send(values.serialize([self.philosopher_id, values.ACTION_PICK_FORK]))
data = lfork.receive(1024)
print(str(values.unserialize(data)))
if data:
data_from_fork = values.unserialize(data)
if \
data_from_fork[1] == self.philosopher_id \
and data_from_fork[2] == values.ACTION_PICK_FORK \
and data_from_fork[3] == values.ACTION_SUCCESS:
return lfork
lfork.close()
except Exception as e:
pass
def get_all_forks():
global forks
port = 4001
try:
msocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
msocket.sendto(values.serialize(["philosopher",port]),(values.MONITOR_IP,values.MONITOR_PORT2))
except socket.error as e:
print("Connection error 0: "+str(e))
try:
#this is test
data, server = msocket.recvfrom(2048)
forks = values.unserialize(data)
values.forks = forks
print(forks)
except socket.error as e:
print("Connection error 1: "+str(e))
def register_forks():
host = "localhost"
port = 4446
try:
msocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
msocket.sendto(values.serialize(["fork", port]),
(values.MONITOR_IP, values.MONITOR_PORT2))
except socket.error as e:
print("Connection error 0: " + str(e))
try:
#this is test
data, server = msocket.recvfrom(values.DATA_SIZE)
data_array = values.unserialize(data)
print(str(data_array))
return data_array
except socket.error as e:
print("Connection error 1: " + str(e))
finally:
msocket.close()
def timeout(background_forks):
running = True
host = "localhost"
port = 4446
try:
msocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
msocket.sendto(values.serialize(["timeout", port]),
(values.MONITOR_IP, values.MONITOR_PORT2))
except socket.error as e:
print("Connection error 0: " + str(e))
while running:
try:
data, server = msocket.recvfrom(values.DATA_SIZE)
data_array = values.unserialize(data)
for p in background_forks:
print("background forks terminated", p)
p.terminate()
running = False
except socket.error as e:
print("Connection error 1: " + str(e))
running = False
pass