def __init__(self, timeout, missed_ping, simulation):
self.__client_lock = threading.Lock()
self.__timed_out_lock = threading.Lock()
self.__clients = {}
self.__clientids = {}
self.__timed_out = []
self.__ping_pong = {}
self.__t = PeriodicTimer(timeout, self.__timeout_check, [self])
## The number of missed pings allowed
self.missed_ping = missed_ping
self.__sim = simulation
self.__t.daemon = True
class ClientManager():
## Class constructor
# @param self The instance of playernsd::ClientManager.
# @param timeout The number of seconds for a timeout.
# @param missed_ping The number of missed pings allowed before a disconnect.
def __init__(self, timeout, missed_ping, simulation):
self.__client_lock = threading.Lock()
self.__timed_out_lock = threading.Lock()
self.__clients = {}
self.__clientids = {}
self.__timed_out = []
self.__ping_pong = {}
self.__t = PeriodicTimer(timeout, self.__timeout_check, [self])
## The number of missed pings allowed
self.missed_ping = missed_ping
self.__sim = simulation
self.__t.daemon = True
## Start the timeout poller
# @param self The instance of playernsd::ClientManager.
def start(self):
self.__t.start()
## Stop the timeout poller
# @param self The instance of playernsd::ClientManager.
def stop(self):
self.__t.cancel()
## Add a client that should be polled by the timeout poller
# @param self The instance of playernsd::ClientManager.
# @param address The address of the client.
# @param client The associated playernsd:RemoteClient object.
def add_client(self, address, client):
with self.__client_lock:
self.__clients[address] = RemoteClient(None, address, None, client)
self.__ping_pong[address] = 1
## Register a client with name and protocol version.
# @param name The name of the client.
# @param address The addres sof the client.
def register_client(self, address, name, version):
self.__clients[address].name = name
self.__clients[address].version = version
self.__clientids[name] = self.__clients[address]
if self.__sim:
self.__sim.new_client(name)
## Check if the address is handled by the client manager.
# @param identifier The identifier to refer uniquely to a client.
def has_client(self, identifier):
if isinstance(identifier, str):
return identifier in self.__clientids
else:
return identifier in self.__clients
## Check if the address is already registered in the client manager.
# @param identifier The identifier to refer uniquely to a client.
def is_registered(self, identifier):
if isinstance(identifier, str):
return identifier in self.__clientids
else:
return identifier in self.__clients and self.__clients[identifier].name != None
## Get a RemoteClient object when identified by address or id.
# @param identifier The identifier to refer uniquely to a client.
def get_client(self, identifier):
if isinstance(identifier, str):
return self.__clientids[identifier]
else:
return self.__clients[identifier]
## Remove a client that is polled by the timeout poller.
# @param self The instance of playernsd::ClientManager.
# @param address The address of the client.
def remove_client(self, address):
with self.__client_lock:
if self.__clients[address].name in self.__clientids:
if self.__sim:
self.__sim.remove_client(self.__clients[address].name)
del self.__clientids[self.__clients[address].name]
del self.__clients[address]
## Get a list of client ids.
def get_clientid_list(self):
l = []
for v in self.__clients.itervalues():
l.append(v.name)
return l
## Indicate that a particular client has replied to a ping.
# @param self The instance of playernsd::ClientManager.
# @param address The address of the client.
def pong(self, address):
self.__ping_pong[address] = 0
## Check if a particular client has timed out.
# @param self The instance of playernsd::ClientManager.
# @param address The address of the client.
# @return Boolean return indicating whether the client has timed out.
def is_timed_out(self, address):
return address in self.__timed_out or \
self.__ping_pong[address] < -self.missed_ping
## Send a message to a client.
#
# This is a wrapper function to send a message to a client.
# By default, this sends the message to the client that invoked the request,
# but with the parameters @a s (the target socket) and
# @a ca (the target client address), any client can be messaged.
# @param self The playernsd::ClientManager instance.
# @param msg The message to be sent.
# @param s The socket to send the message to.
# @param ca The client address to send the message to.
def send(self, msg, s, ca):
if VERBOSE > 1:
self.log(ca, 'SEND(' + str(len(msg)) + ')', msg)
# read the type of message, and see if the message should be
# simulated
command = msg.split(' ')
if simulation and (command[0] == 'msgtext' or command[0] == 'msgbin'):
self.__sim.send(command[1], self.__clientids(ca),
msg[msg.find('\n')+1:])
else:
s.send(msg)
## Get a property from the simulation
#
# This function requests a value from the simulation.
# @param self The playernsd::ClientManager instance.
# @param ca The client address that this request comes from.
# @param prop The name of the property.
def prop_get_sim(self, prop, ca):
if self.__sim:
cid = self.__clients[ca].name
self.__sim.prop_get(cid, prop)
else:
self.__clients[ca].socket.send('propval ' + prop + ' ' + '\n')
## Set a property in the simulation
#
# This function sets a value from the simulation.
# @param self The playernsd::ClientManager instance.
# @param _from The client address that this request comes from.
# @param prop The name of the property.
# @param val The value of the property.
def prop_set_sim(self, prop, val, ca):
if self.__sim:
cid = self.__clients[ca].name
self.__sim.prop_set(cid, prop, val)
## Broadcast a message to all clients.
#
# This is a wrapper function to broadcast a message to all clients.
# @param self The playernsd::ClientManager instance.
# @param msg The message to be sent to all clients.
def broadcast(self, msg):
if simulation:
command = msg.split(' ')
self.__sim.send(command[1], '__broadcast__',
msg[msg.find('\n')+1:])
else:
for v in self.__clients.itervalues():
if msg.split(' ')[1] != v.name:
self.send(msg, v.socket, v.address)
## Receive a message from a client.
#
# This is a wrapper function to receive a message from a client and
# logs it.
# @param self The playernsd::ClientManager instance.
# @param s The socket to send the message to.
# @param ca The client address to send the message to.
# @return The message received from the client.
def recv(self, s, ca):
data = s.recv(MAX_READ)
if VERBOSE > 1:
self.log(ca, 'RECV(' + str(len(data)) + ')', data)
return data
## Receive a message from the simulation.
def recv_sim(self, _from, to, msg):
self.__clientids[to].socket.send('msgbin ' + _from + ' ' + str(len(msg)) + '\n' + msg)
## Receive a property value from the simulation.
def prop_val_sim(self, _from, prop, val):
#if val == "":
#self.send('error propnotexist\n') # TODO: Handle empty strings separately?
#else:
self.__clientids[_from].socket.send('propval ' + prop + ' ' + str(val) + '\n')
## Create a log message.
#
# This is used internally to log sent and received messages.
# This is typically only called when --verbose is passed to the daemon.
# @param self The playernsd::ClientManager instance.
# @param ca Client address related to log message.
# @param tag Tag indicating the log level.
# @param msg The message to be logged.
def log(self, ca, tag, msg):
if len(msg):
logmsg = tag + ': ' + msg.encode(sys.stdout.encoding,
'backslashreplace').replace('\n', '\\n')
log.debug(self.get_id(ca) + ' ' + logmsg)
## Get id of client or else return '__unregistered'
def get_id(self, ca):
if ca in self.__clients and self.__clients[ca].name != None:
return '[' + str(ca) + ', ' + self.__clients[ca].name + ']'
else:
return '[' + str(ca) + ', __unregistered]'
# Callback function that periodically checks all clients to see whether
# they are still responding.
# @param args Additional arguments.
# @param args Additional keyword arguments.
def __timeout_check(self, args, kwargs):
with self.__client_lock:
for k,v in self.__clients.iteritems():
try:
self.send('ping\n', v.socket, k)
self.__ping_pong[k] -= 1
if self.__ping_pong[k] < -self.missed_ping:
log.warn(str(k) + ' has missed at least ' +
str(-self.__ping_pong[k]+1) + ' pings, closing connection')
self.send('error missedping\n', v.socket, k)
v.socket.shutdown(1)
except socket.error, msg:
if not self.is_timed_out(k):
self.__timed_out.append(k)
log.warn('Lost connection to ' + str(k) + ' ' + str(msg))
