def reader_test(topics, cons, messages, on_message, wait_on_messages):
reader = AsyncMessageReader(
SERVICE, config_topics, value_type=TEXT, consistency=consistency)
reader.on_message = on_message
reader.open()
write_messages(messages, topics)
wait_on_messages()
reader.close()
def consumer(service):
reader = AsyncMessageReader(service)
reader.on_message = show_message
reader.open()
wait_for_keyboard_interrupt()
reader.close()