def main():
args = aux.parse_args("Echo server with threaded-processing model.")
server_socket = aux.listening_socket(args.port)
while True:
client_socket, client_addr = server_socket.accept()
worker = Worker(client_socket)
worker.start()
def main():
args = aux.parse_args('Echo server with epoll-processing model.')
server_socket = aux.listening_socket(args.port)
server_fileno = server_socket.fileno()
fileno_to_data = {}
fileno_to_socket = {}
read_epoll = select.epoll()
read_epoll.register(server_fileno, select.EPOLLIN)
while True:
for fileno, eventmask in read_epoll.poll(0.05):
if fileno == server_fileno:
client_socket, _ = server_socket.accept()
client_fileno = client_socket.fileno()
fileno_to_data[client_fileno] = ''
fileno_to_socket[client_fileno] = client_socket
read_epoll.register(client_fileno, select.EPOLLIN)
else:
client_socket = fileno_to_socket[fileno]
data = client_socket.recv(1024)
if not data:
read_epoll.unregister(fileno)
del fileno_to_data[fileno]
del fileno_to_socket[fileno]
client_socket.close()
else:
fileno_to_data[fileno] += data
check_writability = [f for f, d in fileno_to_data.iteritems() if d]
if not check_writability:
continue
write_epoll = select.epoll()
for fileno in check_writability:
write_epoll.register(fileno, select.EPOLLOUT)
for fileno, eventmask in write_epoll.poll(0.05):
if eventmask & (select.EPOLLERR | select.EPOLLHUP):
read_epoll.unregister(fileno)
fileno_to_socket[fileno].close()
del fileno_to_data[fileno]
del fileno_to_socket[fileno]
continue
client_socket = fileno_to_socket[fileno]
data = fileno_to_data[fileno]
n = client_socket.send(data)
if n > 0:
fileno_to_data[fileno] = data[n:]
write_epoll.close()
def main():
args = aux.parse_args('Echo server with fork processing model.')
server_socket = aux.listening_socket(args.port)
signal.signal(signal.SIGCHLD, signal.SIG_IGN)
while True:
client_socket, client_addr = server_socket.accept()
if os.fork() == 0:
server_socket.close()
aux.communicate(client_socket)
client_socket.close()
return
else:
client_socket.close()
def main():
args = aux.parse_args('Echo server with select-processing model.')
server_socket = aux.listening_socket(args.port)
socket_to_data = {}
client_sockets = []
all_sockets = [server_socket]
while True:
readable, _, _ = select.select(all_sockets, [], [], 0.05)
if server_socket in readable:
client_socket, _ = server_socket.accept()
socket_to_data[client_socket] = ''
client_sockets.append(client_socket)
all_sockets.append(client_socket)
readable.remove(server_socket)
for client_socket in readable:
data = client_socket.recv(1024)
if not data:
del socket_to_data[client_socket]
client_sockets.remove(client_socket)
all_sockets.remove(client_socket)
client_socket.close()
else:
socket_to_data[client_socket] += data
check_writability = [cs for cs in client_sockets
if socket_to_data[cs]]
_, writable, _ = select.select([], check_writability, [], 0.05)
for client_socket in writable:
data = socket_to_data[client_socket]
n = client_socket.send(data)
if n > 0:
socket_to_data[client_socket] = data[n:]
# Two sided ledger book
book = Market()
# Tracks the value of the last issued sell (income) or buy (expense)
last_price = dict(sell=0, buy=0)
# Tracks whether a price has been issued or has been invalidates
standing_price = dict(sell=False, buy=False)
# Maps a sell or buy action to the correct side of the leger
side = dict(sell='B', buy='S')
# Exit if runtime argument error or help requested
try:
target = aux.parse_args(sys.argv)
except ValueError as e:
print(e.args[0])
sys.exit()
for line in sys.stdin:
# Read message from logfile, skip if there are formatting errors
try:
order = aux.parse_log(line)
except ValueError as e:
sys.stderr.write('{0:s}: {1:s}\n'.format(e.args[0], line))
continue
# Modify the book based on incomming message
if order['order_type'] == 'A':