gmond_python.py

import pprint
import httplib
try:
    import json
except ImportError:
    json = None

import sys

descriptors = list()
metrics = {}

def poll_metrics():
    '''Poll @metrics and return them'''
    con = httplib.HTTPConnection('localhost', 80)
    con.connect()
    con.request('GET', '/@metrics/metrics')
    resp = con.getresponse()
    data = json.loads(resp.read())
    for metric,value in data['meters'].items():
        metrics[metric] = [value['count'], 'meters']
    for metric,value in data['histograms'].items():
        metrics[metric] = [value['count'], 'histograms']
    return metrics

def get_value(name):
    # will when this crap works implement a last check timer so it doesn't re-poll for every single metric
    metrics = poll_metrics()
    return metrics[name][0]

def metric_init(params):
    global descriptors

    data = poll_metrics()
    #print data
    #print '[at_metrics] Received the following parameters'
    #print params

    for metric, value in data.items():
        descriptors.append({'name': str(metric),
            'call_back': get_value,
            'time_max': 90,
            'value_type': 'double',
            'units': '',
            'slope': 'both',
            'format': '%u',
            'description': '%s metric' %str(metric),
            'groups': 'at_metrics,%s' %value[1]})

    #pprint.pprint(descriptors)
    return descriptors

def metric_cleanup():
    '''Clean up the metric module.'''
    pass

if __name__ == '__main__':
    metric_init(0)
    for d in descriptors:
        v = d['call_back'](d['name'])
        print 'value for %s is %u' % (d['name'], v)