/usr/lib/python2.7/dist-packages/stompy/stomp.py is in python-stompy 0.2.9-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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from stompy.frame import Frame
from functools import wraps
class NotConnectedError(Exception):
"""No longer connected to the STOMP server."""
class ConnectionError(socket.error):
"""Couldn't connect to the STOMP server."""
class ConnectionTimeoutError(socket.timeout):
"""Timed-out while establishing connection to the STOMP server."""
class Stomp(object):
"""STOMP Client.
:param hostname: Hostname of the STOMP server to connect to.
:param port: The port to use. (default ``61613``)
"""
ConnectionError = ConnectionError
ConnectionTimeoutError = ConnectionTimeoutError
NotConnectedError = NotConnectedError
def __init__(self, hostname, port=61613):
self.host = hostname
self.port = port
self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self._subscribed_to = {}
self._subscribed = None
self._callback = None
self.connected = None
self.frame = Frame()
def connect(self, username=None, password=None, clientid=None):
"""Connect to STOMP server.
:keyword username: Username for connection
:keyword password: Password for connection
:keyword clientid: Client identification for persistent connections
"""
try:
self.sock.connect((self.host, self.port))
self.frame.connect(self.sock, username=username, password=password, clientid=clientid)
except socket.timeout, exc:
raise self.ConnectionTimeoutError(*exc.args)
except socket.error, exc:
raise self.ConnectionError(*exc.args)
self.connected = True
def disconnect(self, conf=None):
"""Disconnect from the server."""
try:
for destination in self._subscribed_to.keys():
self.unsubscribe({"destination": destination})
self._send_command("DISCONNECT", conf)
except self.NotConnectedError:
pass
try:
self.sock.shutdown(0)
self.sock.close()
except socket.error, exc:
# likely wasn't connected
pass
self.connected = False
def send(self, conf=None):
"""Send message to STOMP server
You'll need to pass the body and any other headers your
STOMP server likes.
destination is **required**
In the case of ActiveMQ with persistence, you could do this:
>>> for i in xrange(1,1000):
... stomp.send({'destination': '/queue/foo',
... 'body': 'Testing',
... 'persistent': 'true'})
"""
headers = dict(conf)
body = headers.pop("body", "")
return self._send_command("SEND", headers, extra={"body": body},
want_receipt=True)
def _build_frame(self, *args, **kwargs):
self._connected_or_raise()
return self.frame.build_frame(*args, **kwargs)
def subscribe(self, conf=None):
"""Subscribe to a given destination
You will need to pass any headers your STOMP server likes.
destination is *required*
In the case of ActiveMQ, you could do this:
>>> stomp.subscribe({'destination':'/queue/foo',
... 'ack':'client'})
"""
destination = conf["destination"]
self._send_command("SUBSCRIBE", conf)
self._subscribed_to[destination] = True
def begin(self, conf=None):
"""Begin transaction.
You will need to pass any headers your STOMP server likes.
destination is *required*
In the case of ActiveMQ, you could do this:
>>> stomp.begin({'transaction':'<randomish_hash_like_thing>'})
"""
self._send_command("BEGIN", conf)
def commit(self, conf=None):
"""Commit transaction.
You will need to pass any headers your STOMP server likes.
destination is **required**
In the case of ActiveMQ, you could do this:
>>> stomp.commit({'transaction':'<randomish_hash_like_thing>'})
"""
self._send_command("COMMIT", conf)
def abort(self, conf=None):
"""Abort transaction.
In the case of ActiveMQ, you could do this:
>>> stomp.abort({'transaction':'<randomish_hash_like_thing>'})
"""
self._send_command("ABORT", conf)
def unsubscribe(self, conf=None):
"""Unsubscribe from a given destination
You will need to pass any headers your STOMP server likes.
destination is *required*
>>> stomp.unsubscribe({'destination':'/queue/foo'})
"""
destination = conf["destination"]
self._send_command("UNSUBSCRIBE", conf)
self._subscribed_to.pop(destination, None)
def ack(self, frame):
"""Acknowledge receipt of a message
:param: A :class:`stompy.frame.Frame` instance.
Example
>>> while True:
... frame = stomp.receive_frame()
... stomp.ack(frame)
"""
message_id = frame.headers.get('message-id')
self._send_command("ACK", {"message-id": message_id})
def receive_frame(self, callback=None, nonblocking=False):
"""Get a frame from the STOMP server
:keyword nonblocking: By default this function waits forever
until there is a message to be received, however, in non-blocking
mode it returns ``None`` if there is currently no message
available.
:keyword callback: Optional function to execute when message recieved.
Note that you must be subscribed to one or more destinations.
Use :meth:`subscribe` to subscribe to a topic/queue.
Example: Blocking
>>> while True:
... frame = stomp.receive_frame()
... print(frame.headers['message-id'])
... stomp.ack(frame)
Example: Non-blocking
>>> frame = stomp.recieve_frame(nonblocking=True)
>>> if frame:
... process_message(frame)
... else:
... # no messages yet.
"""
self._connected_or_raise()
self._callback = callback
message = None
if self._callback:
message = self.frame.get_message(nb=nonblocking)
self._callback(message)
return
else:
return self.frame.get_message(nb=nonblocking)
def poll(self, callback=None):
"""Alias to :meth:`receive_frame` with ``nonblocking=True``."""
return self.receive_frame(nonblocking=True, callback=callback)
def send_frame(self, frame):
"""Send a custom frame to the STOMP server
:param frame: A :class:`stompy.frame.Frame` instance.
Example
>>> from stompy import Frame
>>> frame = Frame().build_frame({
... "command": "DISCONNECT",
... "headers": {},
... })
>>> stomp.send_frame(frame)
"""
self._connected_or_raise()
frame = self.frame.send_frame(frame.as_string())
return frame
def _send_command(self, command, conf=None, extra=None, **kwargs):
conf = conf or {}
extra = extra or {}
frame_conf = {"command": command, "headers": conf}
frame_conf.update(extra)
frame = self._build_frame(frame_conf, **kwargs)
reply = self.send_frame(frame)
if kwargs.get("want_receipt", False):
return reply
return frame
def _connected_or_raise(self):
if not self.connected:
raise self.NotConnectedError("Not connected to STOMP broker.")
@property
def subscribed(self):
"""**DEPRECATED** The queue or topic currently subscribed to."""
as_list = self._subscribed_to.keys()
if not as_list:
return
return as_list[0]
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