| #!/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, unicode_literals |
| import optparse |
| import time |
| try: |
| import Queue |
| except: |
| import queue as Queue |
| |
| |
| from proton import Message |
| from proton.handlers import MessagingHandler |
| from proton.reactor import ApplicationEvent, Container, EventInjector |
| from db_common import Db |
| |
| class Send(MessagingHandler): |
| def __init__(self, url, count): |
| super(Send, self).__init__() |
| self.url = url |
| self.delay = 0 |
| self.sent = 0 |
| self.confirmed = 0 |
| self.load_count = 0 |
| self.records = Queue.Queue(maxsize=50) |
| self.target = count |
| self.db = Db("src_db", EventInjector()) |
| |
| def keep_sending(self): |
| return self.target == 0 or self.sent < self.target |
| |
| def on_start(self, event): |
| self.container = event.container |
| self.container.selectable(self.db.injector) |
| self.sender = self.container.create_sender(self.url) |
| |
| def on_records_loaded(self, event): |
| if self.records.empty(): |
| if event.subject == self.load_count: |
| print("Exhausted available data, waiting to recheck...") |
| # check for new data after 5 seconds |
| self.container.schedule(5, self) |
| else: |
| self.send() |
| |
| def request_records(self): |
| if not self.records.full(): |
| print("loading records...") |
| self.load_count += 1 |
| self.db.load(self.records, event=ApplicationEvent("records_loaded", link=self.sender, subject=self.load_count)) |
| |
| def on_sendable(self, event): |
| self.send() |
| |
| def send(self): |
| while self.sender.credit and not self.records.empty(): |
| if not self.keep_sending(): return |
| record = self.records.get(False) |
| id = record['id'] |
| self.sender.send(Message(id=id, durable=True, body=record['description']), tag=str(id)) |
| self.sent += 1 |
| print("sent message %s" % id) |
| self.request_records() |
| |
| def on_settled(self, event): |
| id = int(event.delivery.tag) |
| self.db.delete(id) |
| print("settled message %s" % id) |
| self.confirmed += 1 |
| if self.confirmed == self.target: |
| event.connection.close() |
| self.db.close() |
| |
| def on_disconnected(self, event): |
| self.db.reset() |
| self.sent = self.confirmed |
| |
| def on_timer_task(self, event): |
| print("Rechecking for data...") |
| self.request_records() |
| |
| parser = optparse.OptionParser(usage="usage: %prog [options]", |
| description="Send messages to the supplied address.") |
| parser.add_option("-a", "--address", default="localhost:5672/examples", |
| help="address to which messages are sent (default %default)") |
| parser.add_option("-m", "--messages", type="int", default=0, |
| help="number of messages to send; 0 sends indefinitely (default %default)") |
| opts, args = parser.parse_args() |
| |
| try: |
| Container(Send(opts.address, opts.messages)).run() |
| except KeyboardInterrupt: pass |
| |