| #!/usr/bin/env python3 |
| # |
| # 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. |
| # |
| |
| import optparse |
| from proton import Disposition, Message, Url |
| from proton.reactor import Container |
| from proton.handlers import MessagingHandler, TransactionHandler |
| |
| |
| class TxSend(MessagingHandler, TransactionHandler): |
| def __init__(self, url, messages, batch_size): |
| super(TxSend, self).__init__() |
| self.url = Url(url) |
| self.msg_id = 0 |
| self.accepted = 0 |
| self.current_batch = 0 |
| self.committed = 0 |
| self.total = messages |
| self.batch_size = batch_size |
| |
| def on_start(self, event): |
| self.container = event.container |
| self.conn = self.container.connect(self.url) |
| self.sender = self.container.create_sender(self.conn, self.url.path) |
| self.container.declare_transaction(self.conn, handler=self) |
| self.transaction = None |
| |
| def on_transaction_declared(self, event): |
| self.transaction = event.transaction |
| self.send() |
| |
| def on_sendable(self, event): |
| self.send() |
| |
| def send(self): |
| while self.transaction and self.sender.credit and self.current_batch < self.batch_size: |
| self.msg_id += 1 |
| msg = Message(id=self.msg_id, body={'sequence': self.msg_id}) |
| self.transaction.send(self.sender, msg) |
| self.current_batch += 1 |
| |
| def on_delivery_updated(self, event): |
| """Transactional deliveries are updated via transactional state updates""" |
| delivery = event.delivery |
| disposition = delivery.remote |
| # Is this a transactioned delivery update? |
| if disposition.type == Disposition.TRANSACTIONAL_STATE: |
| tid = disposition.id |
| outcome = disposition.outcome_type |
| if outcome == Disposition.ACCEPTED: |
| self.accepted += 1 |
| if self.accepted == self.batch_size: |
| self.transaction.commit() |
| self.transaction = None |
| else: |
| print(f"delivery {delivery.tag} not accepted - rollback transaction {tid}") |
| if self.transaction and self.transaction.id == tid: |
| self.transaction.abort() |
| self.transaction = None |
| elif event.sender == self.sender: |
| print(f"delivery {delivery.tag} - Unexpected non-transactional update - aborting transaction") |
| if self.transaction: |
| self.transaction.abort() |
| self.transaction = None |
| |
| def on_transaction_committed(self, event): |
| self.committed += self.current_batch |
| if self.committed == self.total: |
| print(f"{self.committed} messages committed") |
| event.connection.close() |
| else: |
| self.accepted = 0 |
| self.current_batch = 0 |
| self.container.declare_transaction(self.conn, handler=self) |
| |
| def on_transaction_aborted(self, event): |
| print(f"{self.committed} committed, transaction aborted - closing") |
| event.connection.close() |
| |
| def on_disconnected(self, event): |
| self.current_batch = 0 |
| |
| |
| parser = optparse.OptionParser(usage="usage: %prog [options]", |
| description="Send messages transactionally 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=100, |
| help="number of messages to send (default %default)") |
| parser.add_option("-b", "--batch-size", type="int", default=10, |
| help="number of messages in each transaction (default %default)") |
| opts, args = parser.parse_args() |
| |
| try: |
| Container(TxSend(opts.address, opts.messages, opts.batch_size)).run() |
| except KeyboardInterrupt: |
| pass |
