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#!/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
#
# 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.
import argparse
import json
import avro.ipc
import avro.protocol
MAIL_PROTOCOL = avro.protocol.parse(
json.dumps(
{
"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"},
},
}
)
)
SERVER_HOST = "localhost"
SERVER_PORT = 9090
def make_requestor(server_host: str, server_port: int, protocol: avro.protocol.Protocol) -> avro.ipc.Requestor:
client = avro.ipc.HTTPTransceiver(server_host, server_port)
return avro.ipc.Requestor(protocol, client)
def _parse_args() -> argparse.Namespace:
"""Parse the command-line arguments"""
parser = argparse.ArgumentParser()
parser.add_argument("to", help="Who the message is to")
parser.add_argument("from_", help="Who the message is from")
parser.add_argument("body", help="The message body")
parser.add_argument("num_messages", type=int, default=1, help="The number of messages")
return parser.parse_args()
def main() -> int:
# client code - attach to the server and send a message fill in the Message record
args = _parse_args()
params = {"message": {"to": args.to, "from": args.from_, "body": args.body}}
# send the requests and print the result
for msg_count in range(args.num_messages):
requestor = make_requestor(SERVER_HOST, SERVER_PORT, MAIL_PROTOCOL)
result = requestor.request("send", params)
print(f"Result: {result}")
# try out a replay message
requestor = make_requestor(SERVER_HOST, SERVER_PORT, MAIL_PROTOCOL)
result = requestor.request("replay", dict())
print(f"Replay Result: {result}")
return 0
if __name__ == "__main__":
raise SystemExit(main())
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