Obs
An observer.
Goals
- Plugged in via a WSGI middleware or a basic command (which would just look for the middleware).
- Local instrumentation for various network calls.
- Ability to capture data from instrumented code when an AJAX call (or in theory, a remote RPC) happens.
- Pluggable remote storage for instrumented data (in-memory, memcache, redis).
Future
- Deeper introspection with things such as memory and other machine data.
Instrument Spec
# Create a basic Hook which is responsible for
# recording the description of calls
class RedisHook(Hook):
def on_call(self, instrument, *args, **kwargs):
with instrument.record('description'):
self.execute(*args, **kwargs)
# Create an instrument which is responsible for
# describing hooks
class RedisInstrument(Instrument):
name = 'redis'
def get_hooks(self):
return [
RedisHook('redis.Client.execute'),
]
# Wrap your application
obs = Obs(application)
# register the Instrument with the Obs instance
obs.register(RedisInstrument)
