#!/usr/bin/env python # # Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you 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. # from __future__ import print_function import tornado.ioloop import tornado.web from tornado.gen import coroutine from tornado.concurrent import Future from proton import Message from proton.handlers import MessagingHandler from proton_tornado import Container class Client(MessagingHandler): def __init__(self, host, address): super(Client, self).__init__() self.host = host self.address = address self.sent = [] self.pending = [] self.reply_address = None self.sender = None self.receiver = None def on_start(self, event): conn = event.container.connect(self.host) self.sender = event.container.create_sender(conn, self.address) self.receiver = event.container.create_receiver(conn, None, dynamic=True) def on_link_opened(self, event): if event.receiver == self.receiver: self.reply_address = event.link.remote_source.address self.do_request() def on_sendable(self, event): self.do_request() def on_message(self, event): if self.sent: request, future = self.sent.pop(0) print("%s => %s" % (request, event.message.body)) future.set_result(event.message.body) self.do_request() def do_request(self): if self.pending and self.reply_address and self.sender.credit: request, future = self.pending.pop(0) self.sent.append((request, future)) req = Message(reply_to=self.reply_address, body=request) self.sender.send(req) def request(self, body): future = Future() self.pending.append((body, future)) self.do_request() self.container.touch() return future class ExampleHandler(tornado.web.RequestHandler): def initialize(self, client): self.client = client def get(self): self._write_open() self._write_form() self._write_close() @coroutine def post(self): response = yield self.client.request(self.get_body_argument("message")) self.set_header("Content-Type", "text/html") self._write_open() self._write_form() self.write("Response: " + response) self._write_close() def _write_open(self): self.write('') def _write_close(self): self.write('') def _write_form(self): self.write('') loop = tornado.ioloop.IOLoop.instance() client = Client("localhost:5672", "examples") client.container = Container(client, loop=loop) client.container.initialise() app = tornado.web.Application([tornado.web.url(r"/client", ExampleHandler, dict(client=client))]) app.listen(8888) try: loop.start() except KeyboardInterrupt: loop.stop()