statsd/examples/python_example.py

# python_example.py

# Steve Ivy <steveivy@gmail.com>
# http://monkinetic.com

# Sends statistics to the stats daemon over UDP
class StatsdClient(object):
    def __init__(self, host='localhost', port=8125):
        self.addr=(host, port)

    def timing(self, stat, time, sample_rate=1):
        """
        Log timing information
        >>> from python_example import Statsd
        >>> Statsd.timing('some.time', 500)
        """
        stats = {}
        stats[stat] = "%d|ms" % time
        self.send(stats, sample_rate)

    def increment(self, stats, sample_rate=1):
        """
        Increments one or more stats counters
        >>> Statsd.increment('some.int')
        >>> Statsd.increment('some.int',0.5)
        """
        self.update_stats(stats, 1, sample_rate)

    def decrement(self, stats, sample_rate=1):
        """
        Decrements one or more stats counters
        >>> Statsd.decrement('some.int')
        """
        self.update_stats(stats, -1, sample_rate)

    def update_stats(self, stats, delta=1, sampleRate=1):
        """
        Updates one or more stats counters by arbitrary amounts
        >>> Statsd.update_stats('some.int',10)
        """
        if isinstance(stats, list):
            stats = [stats]
        data = {}
        for stat in stats:
            data[stat] = "%s|c" % delta

        self.send(data, sampleRate)

    def send(self, data, sample_rate=1):
        """
        Squirt the metrics over UDP
        """
        sampled_data = {}

        if(sample_rate < 1):
            import random
            if random.random() <= sample_rate:
                for stat, value in data.items():
                    sampled_data[stat] = "%s|@%s" %(value, sample_rate)
        else:
            sampled_data=data

        from socket import socket, AF_INET, SOCK_DGRAM
        udp_sock = socket(AF_INET, SOCK_DGRAM)
        try:
            for stat, value in sampled_data.items():
                send_data = "%s:%s" % (stat, value)
                udp_sock.sendto(send_data, self.addr)
        except Exception:
            import sys
            import traceback
            print >>sys.stderr, "Unexpected error: ", traceback.format_exc()
            return False
        return True


if __name__=="__main__":
    c = StatsdClient()
    c.increment('example.python')