def collect(self):
        """
        Overrides the Collector.collect method
        """
        performance_indicators = {
            'ns': 'network_send',
            'nr': 'network_receive',
            'dw': 'disk_write',
            'dr': 'disk_read',
            'al': 'activity_log',
            'bm': 'bit_map',
            'lo': 'local_count',
            'pe': 'pending',
            'ua': 'unacknowledged',
            'ap': 'application_pending',
            'ep': 'epochs',
            'wo': 'write_order',
            'oos': 'out_of_sync',
            'cs': 'connection_state',
            'ro': 'roles',
            'ds': 'disk_states'
        }

        results = dict()
        try:
            statusfile = open('/proc/drbd', 'r')
            current_resource = ''
            for line in statusfile:
                if re.search('version', line) is None:
                    if re.search(r' \d: cs', line):
                        matches = re.match(r' (\d): (cs:\w+) (ro:\w+/\w+) '
                                           '(ds:\w+/\w+) (\w{1}) .*', line)
                        current_resource = matches.group(1)
                        results[current_resource] = dict()
                    elif re.search(r'\sns:', line):
                        metrics = line.strip().split(" ")
                        for metric in metrics:
                            item, value = metric.split(":")
                            results[current_resource][
                                performance_indicators[item]] = value

                else:
                    continue
            statusfile.close()
        except IOError as errormsg:
            self.log.error("Can't read DRBD status file: {}".format(errormsg))
            return

        for resource in results.keys():
            for metric_name, metric_value in results[resource].items():
                if metric_value.isdigit():
                    self.publish(resource + "." + metric_name, metric_value)
                else:
                    continue
Overrides the Collector.collect method