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Asynchronous message dispatcher for concurrent tasks processing

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Loafer is an asynchronous message dispatcher for concurrent tasks processing.

Currently, only AWS SQS is supported


  • Encourages decoupling from message providers and consumers

  • Easy to extend and customize

  • Easy error handling, including integration with sentry

  • Easy to create one or multiple services

  • Generic Handlers

  • Amazon SQS integration

It requires Python 3.6+ and is very experimental at the moment, expect a lot of changes until the first major version.


A simple message forwader, from source-queue to destination-queue:

from import SQSHandler
from import SQSRoute
from loafer.managers import LoaferManager

routes = [
    SQSRoute('source-queue', handler=SQSHandler('destination-queue')),

if __name__ == '__main__':
    manager = LoaferManager(routes)


Check out the latest Loafer full documentation at Read the Docs website.


2.0.1 (2020-07-28)

  • Fix setry integration (# by @hartungstenio)

  • Minor improvements

2.0.0 (2020-05-16)

  • Dropped support for Python 3.5

  • Added support for Python 3.8

  • Update aiobotocore dependency version (#61 by @GuilhermeVBeira)

  • Improvements due to changes in asyncio (#48, #52 by @lamenezes)

  • Sentry wrapper/helper updated to support new sdk (wip)

  • Minor documentation improvements

1.3.2 (2019-04-27)

  • Improve message processing (#48 by @lamenezes)

  • Improve error logging (#39 by @wiliamsouza)

  • Refactor in message dispatcher and event-loop shutdown

  • Minor fixes and improvements

1.3.1 (2017-10-22)

  • Improve performance (#35 by @allisson)

  • Fix requirement versions resolution

  • Minor fixes and improvements

1.3.0 (2017-09-26)

  • Refactor tasks dispatching, it should improve performance

  • Refactor SQSProvider to ignore HTTP 404 errors when deleting messages

  • Minor fixes and improvements

1.2.1 (2017-09-11)

  • Bump boto3 version (by @daneoshiga)

1.2.0 (2017-08-15)

  • Enable provider parameters (boto client options)

1.1.1 (2017-06-14)

  • Bugfix: fix SNS prefix value in use for topic name wildcard (by @lamenezes)

1.1.0 (2017-05-01)

  • Added initial contracsts for class-based handlers

  • Added generic handlers: SQSHandler/SNSHander

  • Improve internal error handling

  • Improve docs

1.0.2 (2017-04-13)

  • Fix sentry error handler integration

1.0.1 (2017-04-09)

  • Add tox and execute tests for py36

  • Update aiohttp/aiobotocore versions

  • Minor fixes and enhancements

1.0.0 (2017-03-27)

  • Major code rewrite

  • Remove CLI

  • Add better support for error handlers, including sentry/raven

  • Refactor exceptions

  • Add message metadata information

  • Update message lifecycle with handler/error handler return value

  • Enable execution of one service iteration (by default, it still runs “forever”)

0.0.3 (2016-04-24)

  • Improve documentation

  • Improve package metadata and dependencies

  • Add class

  • Fix ImportError exceptions for configuration that uses loafer.utils.import_callable

0.0.2 (2016-04-18)

  • Fix build hardcoding tests dependencies

0.0.1 (2016-04-18)

  • Initial release

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