The fundamental unit of Kafka is a Message. A Message contains a few
bytes of metadata (a magic number, a crc32 checksum, some attributes)
and a payload of bytes. For the most part these details are obscured
from the end-user, so all you have to concern yourself with sending the
actual data (payload). In Java the payload is simply a byte array, in
Python it's just a string.
I'd suggest reading through the Quick Start
(http://kafka.apache.org/quickstart.html), and Design
(http://kafka.apache.org/design.html) if you're really interested in how
things work.
As for sending data with my Python producer, just check out the README
on the project page:
https://github.com/mumrah/kafka-python#send-a-message-to-a-topic
Cheers
On 12/19/12 10:21 AM, Joseph Crotty wrote:
What exactly does a "payload" mean? Sorry, fairly new to Kafka. Is
there a payload method that needs to be called by the python producer?
Thanks for any insights. Attached some sample code if you have time to
lead us to the water! Probably something simple we are missing.
Joe
On Wed, Dec 19, 2012 at 7:46 AM, David Arthur <mum...@gmail.com
<mailto:mum...@gmail.com>> wrote:
Do you mean a Python producer that sends Avro payloads?
There are a couple of Python clients floating around, including
mine: https://github.com/mumrah/kafka-python
The Avro package is in pypi
(http://pypi.python.org/pypi/avro/1.7.3), with official docs and
getting started with Python on the Avro project page
(http://avro.apache.org/docs/1.7.3/gettingstartedpython.html)
Good luck!
On 12/18/12 10:38 PM, Joseph Crotty wrote:
Anyone have a python/avro producer that slurps up records from
a flat file
(i.e., mix of string and binary data) and publishes to Kafka
they would be
willing to share?
Starting to think this might be a whole lot faster to do in
Java, but maybe
someone has a Python solution already in hand.
Joe
