| #!/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. |
| # |
| |
| |
| import pulsar |
| |
| |
| DEFAULT_CLIENT_TOPIC = 'rpc-client-topic' |
| DEFAULT_SERVER_TOPIC = 'rpc-server-topic' |
| |
| |
| class RPCServer(object): |
| def __init__(self, |
| client_topic=DEFAULT_CLIENT_TOPIC, |
| server_topic=DEFAULT_SERVER_TOPIC): |
| self.client_topic = client_topic |
| self.server_topic = server_topic |
| |
| self.client = pulsar.Client('pulsar://localhost:6650') |
| self.producer = self.client.create_producer(client_topic) |
| self.consumer = \ |
| self.client.subscribe(server_topic, |
| 'rpc-server', |
| pulsar.ConsumerType.Shared, |
| message_listener=self.on_response) |
| |
| def on_response(self, consumer, message): |
| print('Received from {0}: {1}'.format(message.partition_key(), |
| message.data().decode('utf-8'))) |
| |
| self.producer.send('{} bar'.format(message.data().decode('utf-8')), |
| partition_key=message.partition_key()) |
| consumer.acknowledge(message) |
| |
| def start(self): |
| self.consumer.resume_message_listener() |
| |
| |
| rpc_server = RPCServer() |
| rpc_server.start() |
| |
| try: |
| while True: |
| pass |
| except KeyboardInterrupt: |
| print('Interrupted.') |