def __init__(self, instance_id, inputs, outputs, exec_params, update_params_host, *args, **kwargs):
self.__update_params_lock = RLock()
self.__parameters_lock = RLock()
self.__stopped = False
self.instance_id = instance_id
self.inputs = inputs
self.outputs = outputs
self.__sockets = {}
self.__parameters = self.format_params(exec_params)
self.__in_encoder = DevEncoding()
self.__out_encoder = DevEncoding()
self.update_params_host = update_params_host
self.__service_communication_watcher = ServiceCommunicationWatcherThread(self)
class SyncService(object):
FILES_DIR = '/tmp/comss'
LOGS_DIR = '/tmp/comss/log'
SEND_TRY_INTERVAL = 3
MAX_SEND_RETRIES = 10
SEND_TIMEOUT = 10
READ_TRY_INTERVAL = 3
MAX_READ_RETRIES = 10
SOCKET_TIMEOUT = 20
in_encoding = 'json'
out_encoding = 'json'
buffer = 4096
watch_input = True
def __init__(self, instance_id, inputs, outputs, exec_params, update_params_host, *args, **kwargs):
self.__update_params_lock = RLock()
self.__parameters_lock = RLock()
self.__stopped = False
self.instance_id = instance_id
self.inputs = inputs
self.outputs = outputs
self.__sockets = {}
self.__parameters = self.format_params(exec_params)
self.__in_encoder = DevEncoding()
self.__out_encoder = DevEncoding()
self.update_params_host = update_params_host
self.__service_communication_watcher = ServiceCommunicationWatcherThread(self)
def format_params(self, params):
return params
def __prepare_read(self, input_id):
input_format, socket, conn, file_like = self.inputs[input_id]
if not conn:
socket.listen(1)
c = socket.accept()
new_conn, addr = c
conn = new_conn
self.inputs[input_id] = (input_format, socket, conn, conn.makefile())
def __get_conn(self, input_id):
self.__prepare_read(input_id)
input_format, socket, conn, as_file = self.inputs[input_id]
return conn
def __get_file_like_conn(self, input_id):
self.__prepare_read(input_id)
input_format, socket, conn, as_file = self.inputs[input_id]
return as_file
def __read(self, input_id, buff=None):
if buff is None:
buff = SyncService.buffer
conn = self.__get_conn(input_id)
msg = conn.recv(buff)
return msg
def __clear_sockets(self, input_id):
input_format, socket, _, _ = self.inputs[input_id]
self.inputs[input_id] = (input_format, socket, None, None)
time.sleep(self.READ_TRY_INTERVAL)
def read(self, input_id, buff=None):
counter = self.MAX_READ_RETRIES
while True:
try:
read_buffer = self.__read(input_id, buff)
except Exception as e:
if not e.errno in SOCKET_ERRORS_TO_RETRY or counter <= 0:
raise e
counter -= 1
self.__clear_sockets(input_id)
else:
if not read_buffer:
counter -= 1
self.__clear_sockets(input_id)
else:
return read_buffer
def __read_raw_msg(self, input_id):
file_like = self.__get_file_like_conn(input_id)
msg = file_like.readline()
return msg
def read_raw_msg(self, input_id):
counter = self.MAX_READ_RETRIES
while True:
try:
read_buffer = self.__read_raw_msg(input_id)
except Exception as e:
__errno = getattr(e, 'errno', None)
if __errno is None:
raise
elif __errno in SOCKET_ERRORS_TO_PASS:
continue
elif not e.errno in SOCKET_ERRORS_TO_RETRY or counter <= 0:
raise e
counter -= 1
self.__clear_sockets(input_id)
else:
if not read_buffer:
counter -= 1
self.__clear_sockets(input_id)
else:
return read_buffer
def read_object(self, input_id):
raw_msg = self.read_raw_msg(input_id)
return self.__in_encoder.decode(raw_msg)
def __send(self, output_id, msg):
if not output_id in self.__sockets:
output_format, output_addr = self.outputs[output_id]
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
output_ip, output_port = output_addr.split(':')
s.connect((output_ip, int(output_port)))
self.__sockets[output_id] = s
self.__sockets[output_id].send(msg)
def send(self, output_id, msg):
counter = self.MAX_SEND_RETRIES
while True:
try:
self.__send(output_id, msg)
except Exception as e:
if getattr(e, 'errno', None) is None:
raise e
if not e.errno in SOCKET_ERRORS_TO_RETRY or counter <= 0:
raise e
counter -= 1
if output_id in self.__sockets:
del(self.__sockets[output_id])
time.sleep(self.SEND_TRY_INTERVAL)
else:
break
def send_raw_msg(self, output_id, msg):
msg += '\n'
self.send(output_id, msg)
def send_object(self, output_id, msg):
self.send_raw_msg(output_id, self.__out_encoder.encode(msg))
def _notify_started(self, started_ok=True):
if started_ok:
self.__service_communication_watcher.start()
def __update(self, new_parameters):
with self.__parameters_lock:
self.__parameters.update(self.format_params(new_parameters))
def update(self, new_parameters):
self.__update(new_parameters)
def get_parameters(self):
with self.__parameters_lock:
return self.__parameters
def run(self):
raise NotImplementedError
def stop(self):
pass
def _stop(self):
if not self.__stopped:
self.__stopped = True
self.stop()
def prepare(self):
pass
