def listen_and_queue(client: localiteClient, ignore: List[Dict[str, str]],
queue: Queue) -> Union[Dict[str, Any], None]:
"""listen to the localice stream and forward to queue
"""
msg = client.listen()
if msg is None or json.loads(msg) in ignore:
return None
else:
print("LOC:MSG", msg)
pl = Payload("mrk", msg, local_clock())
put_in_queue(pl, queue)
return json.loads(msg)
def run(self):
# initialize clients and message expectations
client = localiteClient(host=self.host, port=self.port)
lastmessage = LastMessage()
response = None
self.is_running.set()
print(f"LOC {self.host}:{self.port} started")
while self.is_running.is_set():
try:
payload = get_from_queue(self.inbox)
if payload is None:
if "status" in lastmessage.msg:
response = listen_and_queue(client,
ignore=[],
queue=self.outbox)
else:
response = listen_and_queue(client,
ignore=self.ignore,
queue=self.outbox)
# sometimes, the get: "target_index" is ignored.
# in these cases, resend
if "target_index" in lastmessage.msg:
flevel = lastmessage.expects(response)
if flevel >= 2:
print("LOC:RESEND", lastmessage.msg)
client.send(lastmessage.msg)
lastmessage.counter = 0
else:
print("LOC:RECV", payload)
if payload.fmt == "cmd":
if payload.msg == "poison-pill":
self.is_running.clear()
break
else: # pragma no cover
print("LOC:INVALID", payload)
elif payload.fmt == "loc":
client.send(payload.msg)
lastmessage.update(payload)
except Exception as e: # pragma no cover
if self.is_running.set():
print("LOC:EXC", e)
pl = Payload("mrk", "LOC:EXC " + str(e), local_clock())
put_in_queue(pl, self.outbox)
self.is_running.clear()
print("Shutting LOC down")
def kill(port: int = 6667, host: str = "127.0.0.1") -> bool:
"""kill the markerserver is already at that port
args
----
host: str
the ip of the markerserver (defaults to localhost)
port: int
the port number of the markerserver (defaults to 6667)
returns
-------
status: bool
True if message was sent, False if server was not available
"""
return push_payload(Payload("cmd", "poison-pill", local_clock()))
def available(port: int = 6667, host: str = "127.0.0.1") -> bool:
"""test whether EXT is available at port
args
----
host: str
the ip of the EXT (defaults to localhost)
port: int
the port number of the EXT (defaults to 6667)
returns
-------
status: bool
True if available, False if not
"""
return push_payload(Payload("cmd", "ping", local_clock()))
def push(
fmt: str,
msg: str,
tstamp: int = None,
host="127.0.0.1",
port: int = 6667,
verbose=True,
):
"a functional interface to pushing a message"
tstamp = tstamp or local_clock()
payload = Payload(fmt, msg, tstamp)
try:
Client(host=host, port=port, verbose=verbose).push(payload)
return True
except (ConnectionRefusedError, ConnectionResetError) as e:
if verbose and msg != "ping": # pragma no cover
print(e)
print(f"Localite EXT at {host}:{port} is not available")
return False
def run(self):
outlet, info = make_outlet()
# print(info.as_xml())
print(f"MRK {info.name()} started")
self.is_running.set()
while self.is_running.is_set():
payload = get_from_queue(self.queue)
if payload is None:
time.sleep(0.001)
continue
if payload.fmt == "cmd" and payload.msg == "poison-pill":
self.is_running.clear()
outlet.push_sample([payload.msg])
break
outlet.push_sample([str(payload.msg)], payload.tstamp)
latency = 1000 * (payload.tstamp - local_clock())
print(
f"MRK:PUSH {payload.msg} from {payload.tstamp:.5f} delayed by {latency:1.2f}ms"
)
print("Shutting MRK down")
def __init__(self, fmt: str = "", msg: str = "", tstamp: TimeStamp = None):
self.fmt = fmt
self.msg = msg
self.tstamp = tstamp or local_clock()
