def test_reader_takeiter():
dp = DomainParticipant(0)
tp = Topic(dp, "Message", Message)
sub = Subscriber(dp)
pub = Publisher(dp)
dr = DataReader(sub, tp)
dw = DataWriter(pub, tp)
msg = Message("Hello")
dw.write(msg)
read = False
for msgr in dr.take_iter(timeout=duration(milliseconds=10)):
assert not read
assert msg == msgr
read = True
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
"""
from cyclonedds.core import Listener, WaitSet, ReadCondition, ViewState, SampleState, InstanceState, Qos, Policy
from cyclonedds.domain import DomainParticipant
from cyclonedds.topic import Topic
from cyclonedds.sub import Subscriber, DataReader
from cyclonedds.util import duration
from vehicles import Vehicle
class MyListener(Listener):
def on_liveliness_changed(self, reader, status):
print(">> Liveliness event")
listener = MyListener()
qos = Qos(Policy.Reliability.BestEffort(duration(seconds=1)),
Policy.Deadline(duration(microseconds=10)),
Policy.Durability.Transient, Policy.History.KeepLast(10))
domain_participant = DomainParticipant(0)
topic = Topic(domain_participant, 'Vehicle', Vehicle, qos=qos)
subscriber = Subscriber(domain_participant)
reader = DataReader(domain_participant, topic, listener=listener)
for sample in reader.take_iter(timeout=duration(seconds=2)):
print(sample)
