def __init__(self,
mqManager,
mqURI,
consumerId,
callback=generateDefaultCallback()):
self._connectionManager = mqManager
self._mqURI = mqURI
self._destination = getDestinationAddress(self._mqURI)
self._id = consumerId
self._callback = callback
self.log = gLogger.getSubLogger(self.__class__.__name__)
#subscribing to connection
result = self._connectionManager.getConnector(getMQService(
self._mqURI))
if result['OK']:
connector = result['Value']
if connector:
result = connector.subscribe(
parameters={
'messengerId': self._id,
'callback': callback,
'destination': self._destination
})
if not result['OK']:
self.log.error('Failed to subscribe the consumer:' +
self._id)
else:
self.log.error(
'Failed to initialize MQConsumer! No MQConnector!')
else:
self.log.error('Failed to get MQConnector!')
def createConsumer( mqURI, callback = generateDefaultCallback() ):
""" Function creates MQConsumer. All parameters are taken
from the Configuration Service based on the mqURI
value.
Args:
mqURI(str):Pseudo URI identifing MQ service. It has the following format
mqConnection::DestinationType::DestinationName
e.g. blabla.cern.ch::Queue::MyQueue1
callback: callback function that can be used to process the incoming messages
Returns:
S_OK/S_ERROR: with the consumer object in S_OK.
"""
result = _setupConnection( mqURI = mqURI, mType = "consumer" )
if not result['OK']:
gLogger.error( 'Failed to createConsumer:', result['Message'] )
return result
return S_OK( MQConsumer( mqManager = connectionManager, mqURI = mqURI, consumerId = result['Value'], callback = callback ) )
def __init__( self, mqManager, mqURI, consumerId, callback = generateDefaultCallback() ):
self._connectionManager = mqManager
self._mqURI = mqURI
self._destination = getDestinationAddress( self._mqURI )
self._id = consumerId
self._callback = callback
self.log = gLogger.getSubLogger( self.__class__.__name__ )
#subscribing to connection
result = self._connectionManager.getConnector( getMQService( self._mqURI ) )
if result['OK']:
connector = result['Value']
if connector:
result = connector.subscribe( parameters = {'messengerId':self._id, 'callback':callback, 'destination':self._destination} )
if not result['OK']:
self.log.error( 'Failed to subscribe the consumer:' + self._id )
else:
self.log.error( 'Failed to initialize MQConsumer! No MQConnector!' )
else:
self.log.error( 'Failed to get MQConnector!' )
def createConsumer(mqURI, callback=generateDefaultCallback()):
""" Function creates MQConsumer. All parameters are taken
from the Configuration Service based on the mqURI
value.
Args:
mqURI(str):Pseudo URI identifing MQ service. It has the following format
mqConnection::DestinationType::DestinationName
e.g. blabla.cern.ch::Queue::MyQueue1
callback: callback function that can be used to process the incoming messages
Returns:
S_OK/S_ERROR: with the consumer object in S_OK.
"""
result = _setupConnection(mqURI=mqURI, mType="consumer")
if not result['OK']:
gLogger.error('Failed to createConsumer:', result['Message'])
return result
return S_OK(
MQConsumer(mqManager=connectionManager,
mqURI=mqURI,
consumerId=result['Value'],
callback=callback))
