def process(data):
""" Decapsulte data from request and pass them to AgentInvoker. Encapsulate the feedback.
"""
procedure_name, para, uuid = DcaProtocol.decap_input(data) # Decapsulate data into structured data
result = AgentInvoker.invoke(procedure_name, para) # pass these paras to AgentInvoker
feedback = DcaProtocol.encap_output(result, uuid) # Encapsulte the feedback
return feedback
def process(data):
""" Decapsulte data from request and pass them to AgentInvoker. Encapsulate the feedback.
"""
procedure_name, para, uuid = DcaProtocol.decap_input(
data) # Decapsulate data into structured data
result = AgentInvoker.invoke(procedure_name,
para) # pass these paras to AgentInvoker
feedback = DcaProtocol.encap_output(result,
uuid) # Encapsulte the feedback
return feedback
def remote_call(self, procedure_name, para, ip):
""" Encapsulte the data and call the Connector to send the request.
"""
id = uuid.uuid4() # generate a uuid for every request
data = DcaProtocol.encap_input(procedure_name, para, id)
self.request_dict[id] = False # initialized a dict to indicate if a request is answered
self.connector.request(data, ip)
return id
def listen(self, request_dict):
""" Listen to all sockets created by request in one co-routine. Receives data from them and check if all
requests have been answered.
"""
while True:
gevent.sleep(1) # switch to request co-routine
# use select to get readable event
readable, writable, exceptional = select.select(
self.inputs, self.outputs, self.inputs, 0)
if not (readable or writable or exceptional):
print 'No input event'
continue
# polling readable event
for s in readable:
buf = s.recv(9999)
data = buf
while len(buf): # read until there's no data
buf = s.recv(9999)
data += buf
if data:
# print 'recv data:', data, 'from', s.getpeername()
self.message_queue[s].put(
data) # put data into message_queue
self.inputs.remove(
s) # remove socket because only wait for one response
s.close()
else:
# no data received
print 'close the connection', s.getpeername()
if s in self.outputs:
self.outputs.remove(s)
self.inputs.remove(s)
s.close()
del self.message_queue[s]
# exceptional event
for s in exceptional:
print "exceptional connection:", s.getpeername()
self.inputs.remove(s)
if s in self.outputs:
self.outputs.remove(s)
s.close()
del self.message_queue[s]
# check if all requests have been answered
if DcaProtocol.check_termination(self.message_queue, request_dict):
print 'All requests have been answered'
return request_dict
return
def listen(self, request_dict):
""" Listen to all sockets created by request in one co-routine. Receives data from them and check if all
requests have been answered.
"""
while True:
gevent.sleep(1) # switch to request co-routine
# use select to get readable event
readable, writable, exceptional = select.select(self.inputs, self.outputs, self.inputs, 0)
if not (readable or writable or exceptional):
print 'No input event'
continue
# polling readable event
for s in readable:
buf = s.recv(9999)
data = buf
while len(buf): # read until there's no data
buf = s.recv(9999)
data += buf
if data:
# print 'recv data:', data, 'from', s.getpeername()
self.message_queue[s].put(data) # put data into message_queue
self.inputs.remove(s) # remove socket because only wait for one response
s.close()
else:
# no data received
print 'close the connection', s.getpeername()
if s in self.outputs:
self.outputs.remove(s)
self.inputs.remove(s)
s.close()
del self.message_queue[s]
# exceptional event
for s in exceptional:
print "exceptional connection:", s.getpeername()
self.inputs.remove(s)
if s in self.outputs:
self.outputs.remove(s)
s.close()
del self.message_queue[s]
# check if all requests have been answered
if DcaProtocol.check_termination(self.message_queue, request_dict):
print 'All requests have been answered'
return request_dict
return