#!/usr/bin/env python
import os
from datetime import datetime
from fluvio import Fluvio, Offset

TOPIC_NAME = "hello-python"
PARTITION = 0

# This is an example of a basic Fluvio workflow in Python
# 
# 1. Create a topic to store data in via CLI
# 2. Establish a connection to the Fluvio cluster
# 3. Create a producer and send some bytes
# 4. Create a consumer, and stream the data back
if __name__ == "__main__":
   # Currently the Python client does not support creating topics
   # Using the fluvio CLI
   os.popen("fluvio topic create {}".format(TOPIC_NAME))

   # Connect to cluster
   fluvio = Fluvio.connect()

   # Produce to topic
   producer = fluvio.topic_producer(TOPIC_NAME)
   producer.send_string("Hello World! - Time is: {}".format(datetime.now()))

   # Consume from topic
   # We're just going to get the last record
   consumer = fluvio.partition_consumer(TOPIC_NAME, PARTITION)
   for record in consumer.stream(Offset.from_end(0)):
       print("{}".format(record.value_string()))
       break

$ python hello-python.py