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MBQ Atomiq

Project description

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Installation

$ pip install mbq.atomiq

Getting started

  1. Add mbq.atomiq to INSTALLED_APPS in your django application’s settings
  2. Add ATOMIQ specific settings to that same settings file. Those are used for metrics.
ATOMIQ = {
    'env': CURRENT_ENV,
    'service': YOUR_SERICE_NAME,
}
  1. Set up consumers for each queue type that your app needs. mbq.atomiq provides a handy management command for that:
python -m manage atomic_run_consumer --queue sns

python -m manage atomic_run_consumer --queue sqs

python -m manage atomic_run_consumer --queue celery

Note that atomiq will use the celery task name attribute to import and call the task. By default, celery sets the task name to be the path.to.task.module.task_function_name. Overriding the name of a task will cause atomiq to break, so plz don’t do this.

To make sure we’re not holding on to successfully executed or deleted tasks we also have a clean up management command, that by default will clean up all processed tasks that are older than 30 days. That default can be overriden.

python -m manage atomic_cleanup_old_tasks

or

python -m manage atomic_cleanup_old_tasks --days N

or

python -m manage atomic_cleanup_old_tasks --minutes N
  1. Use it!
import mbq.atomiq

mbq.atomiq.sns_publish(topic_arn, message)

mbq.atomiq.sqs_publish(queue_url, message)

mbq.atomiq.celery_publish(celery_task, *task_args, **task_kwargs)

Testing

Tests are automatically in Travis CI https://travis-ci.org/managedbyq/mbq.atomiq but you can also run tests locally using docker-compose. We now use tox for local testing across multiple python environments. Before this use pyenv to install the following python interpreters: cpython{2.7, 3.5, 3.6} and pypy3

$ docker-compose up py36-pg|py36-mysql|py37-pg|py37-mysql

Testing in Other Services

When using atomiq in other services, we don’t want to mock out atomiq’s publish functions. This is because atomiq includes functionality to check that all usages are wrapped in a transaction, and can account for transactions added by Django in test cases. To allow you to test that the tasks you expect have been added the queue, we expose a test_utils module.

Shipping a New Release

  1. Bump the version in __version__.py
  2. Go to Releases in GitHub and “Draft a New Release”
  3. After creating a new release, Travis CI will pick up the new release and ship it to PyPi

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