openbmp-python-api-message/examples/log_consumer.py at df30ccc2dacec21a390a0287c75324300a27de0a · SNAS/openbmp-python-api-message · GitHub

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#!/usr/bin/env python

import yaml
import datetime
import time
import kafka

from openbmp.api.parsed.message import Message
from openbmp.api.parsed.message import BmpStat
from openbmp.api.parsed.message import Collector
from openbmp.api.parsed.message import LsLink
from openbmp.api.parsed.message import LsNode
from openbmp.api.parsed.message import LsPrefix
from openbmp.api.parsed.message import Peer
from openbmp.api.parsed.message import Router
from openbmp.api.parsed.message import UnicastPrefix
from openbmp.api.parsed.message import L3VpnPrefix


def process_message(msg):
    """ Process the message

    :param msg:     Message consumed

    :return:
    """

    m = Message(msg.value)  # Gets body of kafka message.
    t = msg.topic  # Gets topic of kafka message.
    m_tag = t.split('.')[2].upper()
    t_stamp = str(datetime.datetime.now())

    if t == "openbmp.parsed.router":
        router = Router(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print router.to_json_pretty()

    elif t == "openbmp.parsed.peer":
        peer = Peer(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print peer.to_json_pretty()

    elif t == "openbmp.parsed.collector":
        collector = Collector(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print collector.to_json_pretty()

    elif t == "openbmp.parsed.bmp_stat":
        bmp_stat = BmpStat(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print bmp_stat.to_json_pretty()

    elif t == "openbmp.parsed.unicast_prefix":
        unicast_prefix = UnicastPrefix(m)

        # Optional fixture writer
        # with open('unicast_prefixes_message', "w+") as file:
        #     file.write(msg.value + '\n')

        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print unicast_prefix.to_json_pretty()

    elif t == "openbmp.parsed.l3vpn":
        l3vpn_prefix = L3VpnPrefix(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print l3vpn_prefix.to_json_pretty()

    elif t == "openbmp.parsed.ls_node":
        ls_node = LsNode(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print ls_node.to_json_pretty()

    elif t == "openbmp.parsed.ls_link":
        ls_link = LsLink(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print ls_link.to_json_pretty()

    elif t == "openbmp.parsed.ls_prefix":
        ls_prefix = LsPrefix(m)
        print '\n' + 'Received Message (' + t_stamp + ') : ' + m_tag + '(V: ' + str(m.version) + ')'
        print ls_prefix.to_json_pretty()


def main():
    # Enable to topics/feeds
    topics = [
        'openbmp.parsed.router', 'openbmp.parsed.peer', 'openbmp.parsed.collector',
        'openbmp.parsed.bmp_stat', 'openbmp.parsed.unicast_prefix', 'openbmp.parsed.ls_node',
        'openbmp.parsed.ls_link', 'openbmp.parsed.ls_prefix', 'openbmp.parsed.l3vpn'
    ]

    # Read config file
    with open('config.yaml', 'r') as f:
        config_content = yaml.load(f)

    bootstrap_server = config_content['bootstrap_servers']

    try:
        # connect and bind to topics
        print "Connecting to kafka... takes a minute to load offsets and topics, please wait"
        consumer = kafka.KafkaConsumer(
            *topics,
            bootstrap_servers=bootstrap_server,
            client_id="dev-testing" + str(time.time()),
            group_id="dev-testing" + str(time.time()),
            enable_auto_commit=True,
            auto_commit_interval_ms=1000,
            auto_offset_reset="largest"
        )

        print "Now consuming/waiting for messages..."
        for m in consumer:
            process_message(m)

    except kafka.common.KafkaUnavailableError as err:
        print "Kafka Error: %s" % str(err)

    except KeyboardInterrupt:
        print "User stop requested"


if __name__ == '__main__':
    main()