def onDeviceDeleted(object, event):
# Clean up any AMQP queues we may have created for this device.
if not IObjectWillBeAddedEvent.providedBy(event):
connectionInfo = getUtility(IAMQPConnectionInfo)
queueSchema = getUtility(IQueueSchema)
# For some reason, if an error gets thrown by queue_delete, it seems
# to break the connection, so we'll just use a separate connection
# for each call to it.
for queue in ('$OpenStackInboundEvent', '$OpenStackInboundPerf'):
queueName = substitute_replacements(queueSchema._queue_nodes[queue].name,
{'device': object.id})
amqpClient = BlockingPublisher(connectionInfo, queueSchema)
channel = amqpClient.getChannel()
try:
LOG.debug("Removing AMQP queue %s" % queueName)
channel.queue_delete(queueName)
LOG.info("Removed AMQP queue %s successfully." % queueName)
except AMQPChannelException, e:
# if the queue doesn't exist, don't worry about it.
if e.amqp_reply_code == 404:
LOG.debug('Queue %s did not exist', queueName)
else:
LOG.exception(e)
amqpClient.close()
class BlockingQueuePublisher(object):
"""
Class that is responsible for sending messages to the amqp exchange.
"""
implements(IQueuePublisher)
def __init__(self):
self.reconnect()
def reconnect(self):
connectionInfo = getUtility(IAMQPConnectionInfo)
queueSchema = getUtility(IQueueSchema)
self._client = BlockingPublisher(connectionInfo, queueSchema)
def publish(self, exchange, routing_key, message, createQueues=None,
mandatory=False, immediate=False, headers=None,
declareExchange=True):
if createQueues:
for queue in createQueues:
self._client.createQueue(queue)
self._client.publish(exchange, routing_key, message,
mandatory=mandatory, immediate=immediate,
headers=headers, declareExchange=declareExchange)
@property
def channel(self):
return self._client.getChannel()
def close(self):
"""
Closes the channel and connection
"""
self._client.close()
class BlockingQueuePublisher(object):
"""
Class that is responsible for sending messages to the amqp exchange.
"""
implements(IQueuePublisher)
def __init__(self):
self.reconnect()
def reconnect(self):
connectionInfo = getUtility(IAMQPConnectionInfo)
queueSchema = getUtility(IQueueSchema)
self._client = BlockingPublisher(connectionInfo, queueSchema)
def publish(self, exchange, routing_key, message, createQueues=None,
mandatory=False, headers=None,
declareExchange=True):
if createQueues:
for queue in createQueues:
if not self._client.queueExists(queue):
self.reconnect()
self._client.createQueue(queue)
self._client.publish(exchange, routing_key, message,
mandatory=mandatory, headers=headers,
declareExchange=declareExchange)
@property
def channel(self):
return self._client.getChannel()
def close(self):
"""
Closes the channel and connection
"""
self._client.close()
def removeZenPackQueuesExchanges(path):
"""
Attempts to remove all the queues that the zenpack registered
@type Path: string
@param Path: Absolute path to the zenpack (from zenpack.path())
"""
schema = _loadQjs(path)
if not schema:
# no queues to remove
return
connectionInfo = getUtility(IAMQPConnectionInfo)
queueSchema = getUtility(IQueueSchema)
amqpClient = BlockingPublisher(connectionInfo, queueSchema)
channel = amqpClient.getChannel()
queues = schema[0].get('queues', [])
exchanges = schema[0].get('exchanges', [])
log = logging.getLogger('zen.ZenMessaging')
# queues
for identifier, queue in queues.iteritems():
name = queue['name']
try:
substitute_replacements(name, None)
except MissingReplacementException:
# Ignore these - they can't be automatically deleted
continue
try:
log.info("Removing queue %s", name)
channel.queue_delete(name)
except Exception as e:
# the queue might already be deleted etc, do not fail if we can't
# remove it
log.debug(e)
log.info("Unable to remove queue %s", name)
# exchanges
for identifier, exchange in exchanges.iteritems():
name = exchange['name']
try:
log.info("Removing exchange %s", name)
channel.exchange_delete(name)
except Exception as e:
# the queue might already be deleted etc, do not fail if we can't
# remove it
log.debug(e)
log.info("Unable to remove exchange %s", name)
amqpClient.close()
def create_exchanges():
print "Verifying exchanges"
# Create all the AMQP exchanges we require. This should be run before we try
# to have ceilometer send zenoss any events.
zcml.load_config('meta.zcml', zope.component)
zcml.load_config('configure.zcml', zope.component)
zcml.load_config('configure.zcml', Products.ZenMessaging.queuemessaging)
connectionInfo = getUtility(IAMQPConnectionInfo)
queueSchema = getUtility(IQueueSchema)
amqpClient = BlockingPublisher(connectionInfo, queueSchema)
channel = amqpClient.getChannel()
for exchange in ('$OpenStackInbound', ):
exchangeConfig = queueSchema.getExchange(exchange)
print "Verifying configuration of exchange '%s' (%s)" % (exchange, exchangeConfig.name)
# Declare the exchange to which the message is being sent
getAdapter(channel, IAMQPChannelAdapter).declareExchange(exchangeConfig)
amqpClient.close()
import zope.component
from zope.component import getUtility, getAdapter
from Products.Five import zcml
import Products.ZenMessaging.queuemessaging
from zenoss.protocols.interfaces import IAMQPConnectionInfo, IQueueSchema, IAMQPChannelAdapter
from zenoss.protocols.amqp import Publisher as BlockingPublisher
# Create all the AMQP exchanges we require. This should be run before we try
# to have ceilometer send zenoss any events.
if __name__ == '__main__':
zcml.load_config('meta.zcml', zope.component)
zcml.load_config('configure.zcml', zope.component)
zcml.load_config('configure.zcml', Products.ZenMessaging.queuemessaging)
connectionInfo = getUtility(IAMQPConnectionInfo)
queueSchema = getUtility(IQueueSchema)
amqpClient = BlockingPublisher(connectionInfo, queueSchema)
channel = amqpClient.getChannel()
for exchange in ('$OpenStackInbound', '$OpenStackInboundHeartbeats',):
exchangeConfig = queueSchema.getExchange(exchange)
print "Verifying configuration of exchange '%s' (%s)" % (exchange, exchangeConfig.name)
# Declare the exchange to which the message is being sent
getAdapter(channel, IAMQPChannelAdapter).declareExchange(exchangeConfig)
amqpClient.close()
