# permanently failed delivery (after retries).
def acked(err, msg):
"""Delivery report handler called on
successful or failed delivery of message
"""
if err is not None:
print("Failed to deliver message: {}".format(err))
else:
print("Produced record to topic {} partition [{}] @ offset {}".
format(msg.topic(), msg.partition(), msg.offset()))
for n in range(10):
name_object = ccloud_lib.Name()
name_object.name = "alice"
record_key = name_object.to_dict()
count_object = ccloud_lib.Count()
count_object.count = n
record_value = count_object.to_dict()
print("Producing Avro record: {}\t{}".format(name_object.name,
count_object.count))
p.produce(topic=topic,
key=record_key,
value=record_value,
on_delivery=acked)
# p.poll() serves delivery reports (on_delivery)
# from previous produce() calls.
p.poll(0)
p.flush(10)
print("10 messages were produced to topic {}!".format(topic))
msg = c.poll(1.0)
if msg is None:
# No message available within timeout.
# Initial message consumption may take up to
# `session.timeout.ms` for the consumer group to
# rebalance and start consuming
print("Waiting for message or event/error in poll()")
continue
elif msg.error():
print('error: {}'.format(msg.error()))
else:
# Check for Kafka message
record_key = ccloud_lib.Name(msg.key())
name_object = record_key.name
name = name_object['name']
record_value = ccloud_lib.Count(msg.value())
count_object = record_value.count
count = count_object['count']
total_count += count
print("Consumed record with key {} and value {}, \
and updated total count to {}".format(
name, count, total_count))
except SerializerError as e:
# Report malformed record, discard results, continue polling
print("Message deserialization failed {}".format(e))
pass
except KeyboardInterrupt:
pass
finally:
# Leave group and commit final offsets
c.close()