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#
# Copyright (c) 2006 The Apache Software Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""
An AQMP client implementation that uses a custom delegate for
interacting with the server.
"""
import threading
from peer import Peer, Closed
from delegate import Delegate
from connection import Connection, Frame
from spec import load
from queue import Queue
class Client:
def __init__(self, host, port, spec, vhost = None):
self.host = host
self.port = port
self.spec = spec
self.mechanism = None
self.response = None
self.locale = None
self.vhost = vhost
if self.vhost == None:
self.vhost = self.host
self.queues = {}
self.lock = threading.Lock()
self.closed = False
self.started = threading.Event()
self.conn = Connection(self.host, self.port, self.spec)
self.peer = Peer(self.conn, ClientDelegate(self))
def wait(self):
self.started.wait()
if self.closed:
raise EOFError()
def queue(self, key):
self.lock.acquire()
try:
try:
q = self.queues[key]
except KeyError:
q = Queue(0)
self.queues[key] = q
finally:
self.lock.release()
return q
def start(self, response, mechanism="AMQPLAIN", locale="en_US"):
self.mechanism = mechanism
self.response = response
self.locale = locale
self.conn.connect()
self.conn.init()
self.peer.start()
self.wait()
self.channel(0).connection_open(self.vhost)
def channel(self, id):
return self.peer.channel(id)
class ClientDelegate(Delegate):
def __init__(self, client):
Delegate.__init__(self)
self.client = client
def connection_start(self, ch, msg):
ch.connection_start_ok(mechanism=self.client.mechanism,
response=self.client.response,
locale=self.client.locale)
def connection_tune(self, ch, msg):
ch.connection_tune_ok(*msg.fields)
self.client.started.set()
def basic_deliver(self, ch, msg):
self.client.queue(msg.consumer_tag).put(msg)
def channel_close(self, ch, msg):
ch.close(msg)
def connection_close(self, ch, msg):
self.client.peer.close(msg)
def close(self, reason):
self.client.closed = True
self.client.started.set()
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