Add statsd component.

.coveragerc

@@ -72,6 +72,7 @@ omit =
     homeassistant/components/discovery.py
     homeassistant/components/downloader.py
     homeassistant/components/ifttt.py
+    homeassistant/components/statsd.py
     homeassistant/components/influxdb.py
     homeassistant/components/keyboard.py
     homeassistant/components/light/blinksticklight.py

homeassistant/components/statsd.py

@@ -0,0 +1,89 @@
+"""
+homeassistant.components.statsd
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+StatsD component which allows you to send data to many backends.
+
+For list supported backends visit this link:
+https://github.com/etsy/statsd/blob/master/docs/backend.md
+
+For more details about this component, please refer to the documentation at
+https://home-assistant.io/components/statsd/
+"""
+import logging
+import homeassistant.util as util
+from homeassistant.const import (EVENT_STATE_CHANGED, STATE_ON, STATE_OFF,
+                                 STATE_UNLOCKED, STATE_LOCKED, STATE_UNKNOWN)
+from homeassistant.components.sun import (STATE_ABOVE_HORIZON,
+                                          STATE_BELOW_HORIZON)
+
+_LOGGER = logging.getLogger(__name__)
+
+DOMAIN = "statsd"
+DEPENDENCIES = []
+
+DEFAULT_HOST = 'localhost'
+DEFAULT_PORT = 8125
+DEFAULT_PREFIX = 'hass'
+DEFAULT_RATE = 1
+
+REQUIREMENTS = ['python-statsd==1.7.2']
+
+CONF_HOST = 'host'
+CONF_PORT = 'port'
+CONF_PREFIX = 'prefix'
+CONF_RATE = 'rate'
+
+
+def setup(hass, config):
+    """ Setup the StatsD component. """
+
+    from statsd.compat import NUM_TYPES
+    import statsd
+
+    conf = config[DOMAIN]
+
+    host = conf[CONF_HOST]
+    port = util.convert(conf.get(CONF_PORT), int, DEFAULT_PORT)
+    sample_rate = util.convert(conf.get(CONF_RATE), int, DEFAULT_RATE)
+    prefix = util.convert(conf.get(CONF_PREFIX), str, DEFAULT_PREFIX)
+
+    statsd_connection = statsd.Connection(
+        host=host,
+        port=port,
+        sample_rate=sample_rate,
+        disabled=False
+    )
+
+    meter = statsd.Gauge(prefix, statsd_connection)
+
+    def statsd_event_listener(event):
+        """ Listen for new messages on the bus and sends them to StatsD. """
+
+        state = event.data.get('new_state')
+
+        if state is None:
+            return
+
+        if state.state in (STATE_ON, STATE_LOCKED, STATE_ABOVE_HORIZON):
+            _state = 1
+        elif state.state in (STATE_OFF, STATE_UNLOCKED, STATE_UNKNOWN,
+                             STATE_BELOW_HORIZON):
+            _state = 0
+        else:
+            _state = state.state
+            if _state == '':
+                return
+            try:
+                _state = float(_state)
+            except ValueError:
+                pass
+
+        if not isinstance(_state, NUM_TYPES):
+            return
+
+        _LOGGER.debug('Sending %s.%s', state.entity_id, _state)
+        meter.send(state.entity_id, _state)
+
+    hass.bus.listen(EVENT_STATE_CHANGED, statsd_event_listener)
+
+    return True

requirements_all.txt

@@ -177,6 +177,9 @@ python-twitch==1.2.0
 # homeassistant.components.sensor.yr
 xmltodict
 
+# homeassistant.components.statsd
+python-statsd==1.7.2
+
 # homeassistant.components.sun
 astral==0.8.1