class RemoteBroker:
def __init__(self, hostname, port, request_queue_name, response_queue_name,
request_timeout_millis):
hosts = [(hostname, port)]
connect_timeout = 10
self.conn = Connection(host_and_ports=hosts, timeout=connect_timeout)
self.conn.start()
self.conn.connect(wait=True)
self.request_queue_name = request_queue_name
self.response_queue_name = response_queue_name
self.request_timeout_millis = request_timeout_millis
self._timer = None
def acknowledge(self, headers):
self.conn.ack(headers['message-id'], headers['subscription'])
def publish(self, response):
self.conn.send(body=json.dumps(response, separators=(',', ':')),
destination=self.response_queue_name)
def subscribe(self, handling_strategy, audit):
listener = Listener(self, handling_strategy, self.start_timer,
self.stop_timer, audit)
self.conn.set_listener('listener', listener)
self.conn.subscribe(destination=self.request_queue_name,
id=1,
ack='client-individual')
self.start_timer()
def respond_to(self, headers, response):
self.acknowledge(headers)
self.publish(
OrderedDict([('result', response.result), ('error', None),
('id', response.id)]))
def stop(self):
self.conn.unsubscribe(1)
self.conn.remove_listener('listener')
def close(self):
self.conn.disconnect()
def is_connected(self):
return self.conn.is_connected()
def stop_timer(self):
if self._timer is not None:
self._timer.cancel()
def start_timer(self):
self._timer = Timer(self.request_timeout_millis / 1000.00, self.close)
self._timer.start()
class StompCLI(ConnectionListener):
def __init__(self, host='localhost', port=61613, user='', passcode=''):
self.c = Connection([(host, port)], user, passcode)
self.c.set_listener('', self)
self.c.start()
def __print_async(self, frame_type, headers, body):
print "\r \r",
print frame_type
for header_key in headers.keys():
print '%s: %s' % (header_key, headers[header_key])
print
print body
print '> ',
sys.stdout.flush()
def on_connecting(self, host_and_port):
self.c.connect(wait=True)
def on_disconnected(self):
print "lost connection"
def on_message(self, headers, body):
self.__print_async("MESSAGE", headers, body)
def on_error(self, headers, body):
self.__print_async("ERROR", headers, body)
def on_receipt(self, headers, body):
self.__print_async("RECEIPT", headers, body)
def on_connected(self, headers, body):
print 'connected'
self.__print_async("CONNECTED", headers, body)
def ack(self, args):
'''
Usage:
ack <message-id> [transaction-id]
Required Parameters:
message-id - the id of the message being acknowledged
Optional Parameters:
transaction-id - the acknowledgement should be a part of the named transaction
Description:
The command 'ack' is used to acknowledge consumption of a message from a subscription using client
acknowledgment. When a client has issued a 'subscribe' with the ack flag set to client, any messages
received from that destination will not be considered to have been consumed (by the server) until
the message has been acknowledged.
'''
if len(args) < 3:
self.c.ack(message_id=args[1])
else:
self.c.ack(message_id=args[1], transaction=args[2])
def abort(self, args):
'''
Usage:
abort <transaction-id>
Required Parameters:
transaction-id - the transaction to abort
Description:
Roll back a transaction in progress.
'''
self.c.abort(transaction=args[1])
def begin(self, args):
'''
Usage:
begin
Description:
Start a transaction. Transactions in this case apply to sending and acknowledging -
any messages sent or acknowledged during a transaction will be handled atomically based on the
transaction.
'''
print 'transaction id: %s' % self.c.begin()
def commit(self, args):
'''
Usage:
commit <transaction-id>
Required Parameters:
transaction-id - the transaction to commit
Description:
Commit a transaction in progress.
'''
if len(args) < 2:
print 'expecting: commit <transid>'
else:
print 'committing %s' % args[1]
self.c.commit(transaction=args[1])
def disconnect(self, args):
'''
Usage:
disconnect
Description:
Gracefully disconnect from the server.
'''
try:
self.c.disconnect()
except NotConnectedException:
pass # ignore if no longer connected
def send(self, args):
'''
Usage:
send <destination> <message>
Required Parameters:
destination - where to send the message
message - the content to send
Description:
Sends a message to a destination in the messaging system.
'''
if len(args) < 3:
print 'expecting: send <destination> <message>'
else:
self.c.send(destination=args[1], message=' '.join(args[2:]))
def sendtrans(self, args):
'''
Usage:
sendtrans <destination> <transaction-id> <message>
Required Parameters:
destination - where to send the message
transaction-id - the id of the transaction in which to enlist this message
message - the content to send
Description:
Sends a message to a destination in the message system, using a specified transaction.
'''
if len(args) < 3:
print 'expecting: sendtrans <destination> <transaction-id> <message>'
else:
self.c.send(destination=args[1],
message="%s\n" % ' '.join(args[3:]),
transaction=args[2])
def subscribe(self, args):
'''
Usage:
subscribe <destination> [ack]
Required Parameters:
destination - the name to subscribe to
Optional Parameters:
ack - how to handle acknowledgements for a message; either automatically (auto) or manually (client)
Description:
Register to listen to a given destination. Like send, the subscribe command requires a destination
header indicating which destination to subscribe to. The ack parameter is optional, and defaults to
auto.
'''
if len(args) < 2:
print 'expecting: subscribe <destination> [ack]'
elif len(args) > 2:
print 'subscribing to "%s" with acknowledge set to "%s"' % (
args[1], args[2])
self.c.subscribe(destination=args[1], ack=args[2])
else:
print 'subscribing to "%s" with auto acknowledge' % args[1]
self.c.subscribe(destination=args[1], ack='auto')
def unsubscribe(self, args):
'''
Usage:
unsubscribe <destination>
Required Parameters:
destination - the name to unsubscribe from
Description:
Remove an existing subscription - so that the client no longer receive messages from that destination.
'''
if len(args) < 2:
print 'expecting: unsubscribe <destination>'
else:
print 'unsubscribing from "%s"' % args[1]
self.c.unsubscribe(destination=args[1])
def stats(self, args):
'''
Usage:
stats [on|off]
Description:
Record statistics on messages sent, received, errors, etc. If no argument (on|off) is specified,
dump the current statistics.
'''
if len(args) < 2:
stats = self.c.get_listener('stats')
if stats:
print stats
else:
print 'No stats available'
elif args[1] == 'on':
self.c.set_listener('stats', StatsListener())
elif args[1] == 'off':
self.c.remove_listener('stats')
else:
print 'expecting: stats [on|off]'
def help(self, args):
'''
Usage:
help [command]
Description:
Display info on a specified command, or a list of available commands
'''
if len(args) == 1:
print 'Usage: help <command>, where command is one of the following:'
print ' '
for f in dir(self):
if f.startswith('_') or f.startswith('on_') or f == 'c':
continue
else:
print '%s ' % f,
print ''
return
elif not hasattr(self, args[1]):
print 'There is no command "%s"' % args[1]
return
func = getattr(self, args[1])
if hasattr(func, '__doc__') and getattr(func, '__doc__') is not None:
print func.__doc__
else:
print 'There is no help for command "%s"' % args[1]
class StompCLI(ConnectionListener):
def __init__(self, host='localhost', port=61613, user='', passcode=''):
self.c = Connection([(host, port)], user, passcode)
self.c.set_listener('', self)
self.c.start()
def __print_async(self, frame_type, headers, body):
print "\r \r",
print frame_type
for header_key in headers.keys():
print '%s: %s' % (header_key, headers[header_key])
print
print body
print '> ',
sys.stdout.flush()
def on_connecting(self, host_and_port):
self.c.connect(wait=True)
def on_disconnected(self):
print "lost connection"
def on_message(self, headers, body):
self.__print_async("MESSAGE", headers, body)
def on_error(self, headers, body):
self.__print_async("ERROR", headers, body)
def on_receipt(self, headers, body):
self.__print_async("RECEIPT", headers, body)
def on_connected(self, headers, body):
print 'connected'
self.__print_async("CONNECTED", headers, body)
def ack(self, args):
'''
Usage:
ack <message-id> [transaction-id]
Required Parameters:
message-id - the id of the message being acknowledged
Optional Parameters:
transaction-id - the acknowledgement should be a part of the named transaction
Description:
The command 'ack' is used to acknowledge consumption of a message from a subscription using client
acknowledgment. When a client has issued a 'subscribe' with the ack flag set to client, any messages
received from that destination will not be considered to have been consumed (by the server) until
the message has been acknowledged.
'''
if len(args) < 3:
self.c.ack(message_id=args[1])
else:
self.c.ack(message_id=args[1], transaction=args[2])
def abort(self, args):
'''
Usage:
abort <transaction-id>
Required Parameters:
transaction-id - the transaction to abort
Description:
Roll back a transaction in progress.
'''
self.c.abort(transaction=args[1])
def begin(self, args):
'''
Usage:
begin
Description:
Start a transaction. Transactions in this case apply to sending and acknowledging -
any messages sent or acknowledged during a transaction will be handled atomically based on the
transaction.
'''
print 'transaction id: %s' % self.c.begin()
def commit(self, args):
'''
Usage:
commit <transaction-id>
Required Parameters:
transaction-id - the transaction to commit
Description:
Commit a transaction in progress.
'''
if len(args) < 2:
print 'expecting: commit <transid>'
else:
print 'committing %s' % args[1]
self.c.commit(transaction=args[1])
def disconnect(self, args):
'''
Usage:
disconnect
Description:
Gracefully disconnect from the server.
'''
try:
self.c.disconnect()
except NotConnectedException:
pass # ignore if no longer connected
def send(self, args):
'''
Usage:
send <destination> <message>
Required Parameters:
destination - where to send the message
message - the content to send
Description:
Sends a message to a destination in the messaging system.
'''
if len(args) < 3:
print 'expecting: send <destination> <message>'
else:
self.c.send(destination=args[1], message=' '.join(args[2:]))
def sendreply(self, args):
'''
Usage:
sendreply <destination> <correlation-id> <message>
Required Parameters:
destination - where to send the message
correlation-id - the correlating identifier to send with the response
message - the content to send
Description:
Sends a reply message to a destination in the messaging system.
'''
if len(args) < 4:
print 'expecting: sendreply <destination> <correlation-id> <message>'
else:
self.c.send(destination=args[1], message="%s\n" % ' '.join(args[3:]), headers={'correlation-id': args[2]})
def sendtrans(self, args):
'''
Usage:
sendtrans <destination> <transaction-id> <message>
Required Parameters:
destination - where to send the message
transaction-id - the id of the transaction in which to enlist this message
message - the content to send
Description:
Sends a message to a destination in the message system, using a specified transaction.
'''
if len(args) < 3:
print 'expecting: sendtrans <destination> <transaction-id> <message>'
else:
self.c.send(destination=args[1], message="%s\n" % ' '.join(args[3:]), transaction=args[2])
def subscribe(self, args):
'''
Usage:
subscribe <destination> [ack]
Required Parameters:
destination - the name to subscribe to
Optional Parameters:
ack - how to handle acknowledgements for a message; either automatically (auto) or manually (client)
Description:
Register to listen to a given destination. Like send, the subscribe command requires a destination
header indicating which destination to subscribe to. The ack parameter is optional, and defaults to
auto.
'''
if len(args) < 2:
print 'expecting: subscribe <destination> [ack]'
elif len(args) > 2:
print 'subscribing to "%s" with acknowledge set to "%s"' % (args[1], args[2])
self.c.subscribe(destination=args[1], ack=args[2])
else:
print 'subscribing to "%s" with auto acknowledge' % args[1]
self.c.subscribe(destination=args[1], ack='auto')
def unsubscribe(self, args):
'''
Usage:
unsubscribe <destination>
Required Parameters:
destination - the name to unsubscribe from
Description:
Remove an existing subscription - so that the client no longer receive messages from that destination.
'''
if len(args) < 2:
print 'expecting: unsubscribe <destination>'
else:
print 'unsubscribing from "%s"' % args[1]
self.c.unsubscribe(destination=args[1])
def stats(self, args):
'''
Usage:
stats [on|off]
Description:
Record statistics on messages sent, received, errors, etc. If no argument (on|off) is specified,
dump the current statistics.
'''
if len(args) < 2:
stats = self.c.get_listener('stats')
if stats:
print stats
else:
print 'No stats available'
elif args[1] == 'on':
self.c.set_listener('stats', StatsListener())
elif args[1] == 'off':
self.c.remove_listener('stats')
else:
print 'expecting: stats [on|off]'
def help(self, args):
'''
Usage:
help [command]
Description:
Display info on a specified command, or a list of available commands
'''
if len(args) == 1:
print 'Usage: help <command>, where command is one of the following:'
print ' '
for f in dir(self):
if f.startswith('_') or f.startswith('on_') or f == 'c':
continue
else:
print '%s ' % f,
print ''
return
elif not hasattr(self, args[1]):
print 'There is no command "%s"' % args[1]
return
func = getattr(self, args[1])
if hasattr(func, '__doc__') and getattr(func, '__doc__') is not None:
print func.__doc__
else:
print 'There is no help for command "%s"' % args[1]
