Sprockets DynamoDB
==================
An asynchronous DynamoDB client and mixin for Tornado applications
|Version| |Status| |Coverage| |License|
Installation
------------
``sprockets-dynamodb`` is available on the Python package index and is installable via pip:
.. code:: bash
pip install sprockets-dynamodb
Documentation
-------------
Documentation is available at `sprockets-dynamodb.readthedocs.io <https://sprockets-dynamodb.readthedocs.io>`_.
Configuration
-------------
The following table details the environment variable configuration options.
+----------------------------------+--------------------------------------------------------------------------+---------+
| Variable | Definition | Default |
+==================================+==========================================================================+=========+
| ``DYNAMODB_ENDPOINT`` | Override the default DynamoDB HTTP endpoint | |
+----------------------------------+--------------------------------------------------------------------------+---------+
| ``DYNAMODB_MAX_CLIENTS`` | Maximum number of concurrent DynamoDB clients/requests per process | ``100`` |
+----------------------------------+--------------------------------------------------------------------------+---------+
| ``DYNAMODB_MAX_RETRIES`` | Maximum number retries for transient errors | ``3`` |
+----------------------------------+--------------------------------------------------------------------------+---------+
| ``DYANMODB_NO_CREDS_RATE_LIMIT`` | If set to ``true``, a ``sprockets_dynamodb.NoCredentialsException`` will | |
| | return a 429 response when using ``sprockets_dynamodb.DynamoDBMixin`` | |
+----------------------------------+--------------------------------------------------------------------------+---------+
Mixin Configuration
^^^^^^^^^^^^^^^^^^^
The ``sprockets_dynamodb.DynamoDBMixin`` class will automatically raise ``HTTPError``
responses for different classes of errors coming from DynamoDB. In addition it will attempt to
work with the `Sprockets InfluxDB <https://github.com/sprockets/sprockets-influxdb>`_ client
to instrument all DynamoDB requests, submitting per request measurements to InfluxDB. It will
attempt to automatically tag measurements with the application/service name if the ``SERVICE``
environment variable is set. It will also tag the measurement if the ``ENVIRONMENT`` environment
variable is set with the environment that the application is running in. Finally, if you are
using the `Sprockets Correlation Mixin <https://github.com/sprockets/sprockets.mixins.correlation>`_,
measurements will automatically be tagged with the correlation ID for a request.
Requirements
------------
- `Tornado <https://tornadoweb.org>`_
- `tornado-aws <https://pypi.python.org/pypi/tornado-aws>`_
Version History
---------------
Available at https://sprockets-dynamodb.readthedocs.org/en/latest/history.html
.. |Version| image:: https://img.shields.io/pypi/v/sprockets-dynamodb.svg?
:target: https://pypi.python.org/pypi/sprockets-dynamodb
.. |Status| image:: https://img.shields.io/travis/sprockets/sprockets-dynamodb.svg?
:target: https://travis-ci.org/sprockets/sprockets-dynamodb
.. |Coverage| image:: https://img.shields.io/codecov/c/github/sprockets/sprockets-dynamodb.svg?
:target: https://codecov.io/github/sprockets/sprockets-dynamodb?branch=master
.. |License| image:: https://img.shields.io/pypi/l/sprockets-dynamodb.svg?
:target: https://sprockets-dynamodb.readthedocs.org
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