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108 lines
3.9 KiB
ReStructuredText
108 lines
3.9 KiB
ReStructuredText
sprockets.mixins.metrics
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========================
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|Version| |Status| |Coverage| |License|
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Adjust counter and timer metrics in `StatsD`_ using the same API.
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The mix-in is configured through the ``tornado.web.Application`` settings
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property using a key defined by the specific mix-in.
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Documentation
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-------------
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https://sprocketsmixinsmetrics.readthedocs.io
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Statsd Mixin
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------------
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The following snippet configures the StatsD mix-in from common environment
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variables. This simple handler will emit a timer metric that identifies each
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call to the ``get`` method as well as a separate metric for the database query.
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.. code-block:: python
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import os
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from sprockets.mixins import mediatype
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from sprockets.mixins.metrics import statsd
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from tornado import web
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import queries
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def make_application():
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application = web.Application([
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web.url(r'/', MyHandler),
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], **settings)
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statsd.install({'namespace': 'my-application',
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'host': os.environ.get('STATSD_HOST', '127.0.0.1'),
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'port': os.environ.get('STATSD_PORT', '8125')})
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return application
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class MyHandler(statsd.StatsdMixin,
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mediatype.ContentMixin,
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web.RequestHandler):
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def initialize(self):
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super(MyHandler, self).initialize()
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self.db = queries.TornadoSession(os.environ['MY_PGSQL_DSN'])
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async def get(self, obj_id):
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with self.execution_timer('dbquery', 'get'):
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result = await self.db.query('SELECT * FROM foo WHERE id=%s',
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obj_id)
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self.send_response(result)
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Settings
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^^^^^^^^
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:namespace: The namespace for the measurements
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:host: The Statsd host
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:port: The Statsd port
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:prepend_metric_type: Optional flag to prepend bucket path with the StatsD
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metric type
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Development Quickstart
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----------------------
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.. code-block:: bash
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$ python3.4 -mvenv env
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$ . ./env/bin/activate
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(env)$ env/bin/pip install -r requires/development.txt
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(env)$ nosetests
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test_metrics_with_buffer_not_flush (tests.InfluxDbTests) ... ok
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test_that_cached_db_connection_is_used (tests.InfluxDbTests) ... ok
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test_that_counter_is_tracked (tests.InfluxDbTests) ... ok
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test_that_execution_timer_is_tracked (tests.InfluxDbTests) ... ok
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test_that_http_method_call_details_are_recorded (tests.InfluxDbTests) ... ok
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test_that_metric_tag_is_tracked (tests.InfluxDbTests) ... ok
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test_that_add_metric_tag_is_ignored (tests.StatsdMethodTimingTests) ... ok
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test_that_cached_socket_is_used (tests.StatsdMethodTimingTests) ... ok
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test_that_counter_accepts_increment_value (tests.StatsdMethodTimingTests) ... ok
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test_that_counter_increment_defaults_to_one (tests.StatsdMethodTimingTests) ... ok
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test_that_default_prefix_is_stored (tests.StatsdMethodTimingTests) ... ok
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test_that_execution_timer_records_time_spent (tests.StatsdMethodTimingTests) ... ok
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test_that_http_method_call_is_recorded (tests.StatsdMethodTimingTests) ... ok
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----------------------------------------------------------------------
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Ran 13 tests in 3.572s
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OK
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(env)$ ./setup.py build_sphinx -q
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running build_sphinx
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(env)$ open build/sphinx/html/index.html
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.. _StatsD: https://github.com/etsy/statsd
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.. |Version| image:: https://img.shields.io/pypi/v/sprockets_mixins_metrics.svg
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:target: https://pypi.python.org/pypi/sprockets_mixins_metrics
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.. |Status| image:: https://img.shields.io/travis/sprockets/sprockets.mixins.metrics.svg
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:target: https://travis-ci.org/sprockets/sprockets.mixins.metrics
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.. |Coverage| image:: https://img.shields.io/codecov/c/github/sprockets/sprockets.mixins.metrics.svg
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:target: https://codecov.io/github/sprockets/sprockets.mixins.metrics?branch=master
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.. |License| image:: https://img.shields.io/pypi/l/sprockets_mixins_metrics.svg
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:target: https://github.com/sprockets/sprockets.mixins.metrics/blob/master/LICENSE
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