| #!/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 |
| # |
| # https://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 absolute_import, division, print_function |
| |
| import sys |
| |
| from avro import protocol, txipc |
| from twisted.internet import defer, reactor |
| from twisted.python.util import println |
| |
| MAIL_PROTOCOL_JSON = """\ |
| {"namespace": "example.proto", |
| "protocol": "Mail", |
| |
| "types": [ |
| {"name": "Message", "type": "record", |
| "fields": [ |
| {"name": "to", "type": "string"}, |
| {"name": "from", "type": "string"}, |
| {"name": "body", "type": "string"} |
| ] |
| } |
| ], |
| |
| "messages": { |
| "send": { |
| "request": [{"name": "message", "type": "Message"}], |
| "response": "string" |
| }, |
| "replay": { |
| "request": [], |
| "response": "string" |
| } |
| } |
| } |
| """ |
| MAIL_PROTOCOL = protocol.parse(MAIL_PROTOCOL_JSON) |
| SERVER_HOST = 'localhost' |
| SERVER_PORT = 9090 |
| |
| |
| class UsageError(Exception): |
| def __init__(self, value): |
| self.value = value |
| |
| def __str__(self): |
| return repr(self.value) |
| |
| |
| def make_requestor(server_host, server_port, protocol): |
| client = txipc.TwistedHTTPTransceiver(SERVER_HOST, SERVER_PORT) |
| return txipc.TwistedRequestor(protocol, client) |
| |
| |
| if __name__ == '__main__': |
| if len(sys.argv) not in [4, 5]: |
| raise UsageError("Usage: <to> <from> <body> [<count>]") |
| |
| # client code - attach to the server and send a message |
| # fill in the Message record |
| message = dict() |
| message['to'] = sys.argv[1] |
| message['from'] = sys.argv[2] |
| message['body'] = sys.argv[3] |
| |
| try: |
| num_messages = int(sys.argv[4]) |
| except IndexError: |
| num_messages = 1 |
| |
| # build the parameters for the request |
| params = {} |
| params['message'] = message |
| |
| requests = [] |
| # send the requests and print the result |
| for msg_count in range(num_messages): |
| requestor = make_requestor(SERVER_HOST, SERVER_PORT, MAIL_PROTOCOL) |
| d = requestor.request('send', params) |
| d.addCallback(lambda result: println("Result: " + result)) |
| requests.append(d) |
| results = defer.gatherResults(requests) |
| |
| def replay_cb(result): |
| print("Replay Result: " + result) |
| reactor.stop() |
| |
| def replay(_): |
| # try out a replay message |
| requestor = make_requestor(SERVER_HOST, SERVER_PORT, MAIL_PROTOCOL) |
| d = requestor.request('replay', dict()) |
| d.addCallback(replay_cb) |
| |
| results.addCallback(replay) |
| reactor.run() |
