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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 3.5+ 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 documentation at Read the Docs website.


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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