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110 lines
3.7 KiB
Python
Executable File
110 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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#
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import optparse
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import queue
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from proton import Message
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from proton.handlers import MessagingHandler
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from proton.reactor import ApplicationEvent, Container, EventInjector
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from db_common import Db
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class Send(MessagingHandler):
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def __init__(self, url, count):
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super(Send, self).__init__()
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self.url = url
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self.delay = 0
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self.sent = 0
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self.confirmed = 0
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self.load_count = 0
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self.records = queue.Queue(maxsize=50)
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self.target = count
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self.db = Db("src_db", EventInjector())
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def keep_sending(self):
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return self.target == 0 or self.sent < self.target
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def on_start(self, event):
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self.container = event.container
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self.container.selectable(self.db.injector)
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self.sender = self.container.create_sender(self.url)
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def on_records_loaded(self, event):
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if self.records.empty():
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if event.subject == self.load_count:
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print("Exhausted available data, waiting to recheck...")
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# check for new data after 5 seconds
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self.container.schedule(5, self)
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else:
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self.send()
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def request_records(self):
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if not self.records.full():
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print("loading records...")
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self.load_count += 1
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self.db.load(self.records, event=ApplicationEvent(
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"records_loaded", link=self.sender, subject=self.load_count))
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def on_sendable(self, event):
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self.send()
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def send(self):
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while self.sender.credit and not self.records.empty():
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if not self.keep_sending():
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return
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record = self.records.get(False)
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id = record['id']
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self.sender.send(Message(id=id, durable=True, body=record['description']), tag=str(id))
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self.sent += 1
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print("sent message %s" % id)
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self.request_records()
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def on_settled(self, event):
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id = int(event.delivery.tag)
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self.db.delete(id)
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print("settled message %s" % id)
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self.confirmed += 1
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if self.confirmed == self.target:
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event.connection.close()
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self.db.close()
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def on_disconnected(self, event):
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self.db.reset()
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self.sent = self.confirmed
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def on_timer_task(self, event):
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print("Rechecking for data...")
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self.request_records()
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parser = optparse.OptionParser(usage="usage: %prog [options]",
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description="Send messages to the supplied address.")
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parser.add_option("-a", "--address", default="localhost:5672/examples",
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help="address to which messages are sent (default %default)")
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parser.add_option("-m", "--messages", type="int", default=0,
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help="number of messages to send; 0 sends indefinitely (default %default)")
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opts, args = parser.parse_args()
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try:
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Container(Send(opts.address, opts.messages)).run()
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except KeyboardInterrupt:
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pass |