stopwatch core

middleware.py

from time import time
from django.conf import settings
from statsd import Connection, Timer


class StatsDStopWatchMiddleware(object):
    def __init__(self):
        connection = Connection(
            host=getattr(settings, 'STATSD_HOST', None),
            port=getattr(settings, 'STATSD_PORT', None)
        )
        self.timer = Timer(
            name=getattr(settings, 'STATSD_PREFIX', 'stopwatch'),
            connection=connection,
        )

    def process_request(self, request):
        request._stopwatch_start = time()

    def process_response(self, request, response):
        key = '.'.join(map(unicode, [
            request.resolver_match.namespace,
            request.resolver_match.url_name,
            request.method,
            response.status_code,
            ]))
        timing = time() - request._stopwatch_start
        self.timer.send(key, timing)
        return response