def test_pub_sub(nats_client, protocol_factory, port):
global response_received
pub_transport_factory = FNatsPublisherTransportFactory(nats_client)
sub_transport_factory = FNatsSubscriberTransportFactory(nats_client)
provider = FScopeProvider(pub_transport_factory, sub_transport_factory,
protocol_factory)
publisher = EventsPublisher(provider)
yield publisher.open()
def subscribe_handler(context, event):
print("Response received {}".format(event))
global response_received
if context:
response_received = True
# Subscribe to response
preamble = "foo"
ramble = "bar"
subscriber = EventsSubscriber(provider)
yield subscriber.subscribe_EventCreated(preamble, ramble, "response",
"{}".format(port),
subscribe_handler)
event = Event(Message="Sending Call")
context = FContext("Call")
context.set_request_header(PREAMBLE_HEADER, preamble)
context.set_request_header(RAMBLE_HEADER, ramble)
print("Publishing...")
publisher.publish_EventCreated(context, preamble, ramble, "call",
"{}".format(port), event)
# Loop with sleep interval. Fail if not received within 3 seconds
total_time = 0
interval = .1
while total_time < 3:
if response_received:
break
else:
yield gen.sleep(interval)
total_time += interval
if not response_received:
print("Pub/Sub response timed out!")
exit(1)
yield publisher.close()
exit(0)
def main():
parser = argparse.ArgumentParser(description="Run a tornado python server")
parser.add_argument('--port', dest='port', default='9090')
parser.add_argument('--protocol',
dest='protocol_type',
default="binary",
choices="binary, compact, json")
parser.add_argument('--transport',
dest="transport_type",
default="stateless",
choices="stateless, http")
args = parser.parse_args()
if args.protocol_type == "binary":
protocol_factory = FProtocolFactory(TBinaryProtocolFactory())
elif args.protocol_type == "compact":
protocol_factory = FProtocolFactory(TCompactProtocolFactory())
elif args.protocol_type == "json":
protocol_factory = FProtocolFactory(TJSONProtocolFactory())
else:
logging.error("Unknown protocol type: %s", args.protocol_type)
sys.exit(1)
nats_client = NATS()
options = {"verbose": True, "servers": ["nats://127.0.0.1:4222"]}
yield nats_client.connect(**options)
global port
port = args.port
handler = FrugalTestHandler()
subject = "frugal.*.*.rpc.{}".format(args.port)
processor = Processor(handler)
if args.transport_type == "stateless":
server = FNatsServer(nats_client, [subject], processor,
protocol_factory)
# start healthcheck so the test runner knows the server is running
thread.start_new_thread(healthcheck, (port, ))
print("Starting {} server...".format(args.transport_type))
yield server.serve()
elif args.transport_type == "http":
factories = {
'processor': processor,
'protocol_factory': protocol_factory
}
server = Application([(r'/', FHttpHandler, factories)])
print("Starting {} server...".format(args.transport_type))
server.listen(port)
else:
logging.error("Unknown transport type: %s", args.transport_type)
sys.exit(1)
# Setup subscriber, send response upon receipt
pub_transport_factory = FNatsPublisherTransportFactory(nats_client)
sub_transport_factory = FNatsSubscriberTransportFactory(nats_client)
provider = FScopeProvider(pub_transport_factory, sub_transport_factory,
protocol_factory)
global publisher
publisher = EventsPublisher(provider)
yield publisher.open()
@gen.coroutine
def response_handler(context, event):
print("received {} : {}".format(context, event))
preamble = context.get_request_header(PREAMBLE_HEADER)
if preamble is None or preamble == "":
logging.error("Client did not provide preamble header")
return
ramble = context.get_request_header(RAMBLE_HEADER)
if ramble is None or ramble == "":
logging.error("Client did not provide ramble header")
return
response_event = Event(Message="Sending Response")
response_context = FContext("Call")
global publisher
global port
yield publisher.publish_EventCreated(response_context, preamble,
ramble, "response",
"{}".format(port), response_event)
print("Published event={}".format(response_event))
subscriber = EventsSubscriber(provider)
yield subscriber.subscribe_EventCreated("*", "*", "call",
"{}".format(args.port),
response_handler)