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glances_rabbitmq.py
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glances_rabbitmq.py
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# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2019 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""JMS interface class."""
import datetime
import socket
import sys
from numbers import Number
from glances.compat import range
from glances.logger import logger
from glances.exports.glances_export import GlancesExport
# Import pika for RabbitMQ
import pika
class Export(GlancesExport):
"""This class manages the rabbitMQ export module."""
def __init__(self, config=None, args=None):
"""Init the RabbitMQ export IF."""
super(Export, self).__init__(config=config, args=args)
# Mandatories configuration keys (additional to host and port)
self.user = None
self.password = None
self.queue = None
# Optionals configuration keys
# N/A
# Load the rabbitMQ configuration file
self.export_enable = self.load_conf('rabbitmq',
mandatories=['host', 'port',
'user', 'password',
'queue'],
options=[])
if not self.export_enable:
sys.exit(2)
# Get the current hostname
self.hostname = socket.gethostname()
# Init the rabbitmq client
self.client = self.init()
def init(self):
"""Init the connection to the rabbitmq server."""
if not self.export_enable:
return None
try:
parameters = pika.URLParameters(
'amqp://' + self.user +
':' + self.password +
'@' + self.host +
':' + self.port + '/')
connection = pika.BlockingConnection(parameters)
channel = connection.channel()
return channel
except Exception as e:
logger.critical("Connection to rabbitMQ failed : %s " % e)
return None
def export(self, name, columns, points):
"""Write the points in RabbitMQ."""
data = ('hostname=' + self.hostname + ', name=' + name +
', dateinfo=' + datetime.datetime.utcnow().isoformat())
for i in range(len(columns)):
if not isinstance(points[i], Number):
continue
else:
data += ", " + columns[i] + "=" + str(points[i])
logger.debug(data)
try:
self.client.basic_publish(exchange='', routing_key=self.queue, body=data)
except Exception as e:
logger.error("Can not export stats to RabbitMQ (%s)" % e)