samples/serialization/json/server.py

#
# 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
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import orjson

import dubbo
from dubbo.configs import ServiceConfig
from dubbo.proxy.handlers import RpcMethodHandler, RpcServiceHandler


def request_deserializer(data: bytes) -> tuple[str, int]:
    json_dict = orjson.loads(data)
    return json_dict["name"], json_dict["age"]


def response_serializer(message: str) -> bytes:
    return orjson.dumps({"message": message})


class GreeterServiceServicer:
    def say_hello(self, request):
        name, age = request
        print(f"Received request: {name}, {age}")
        return f"Hello, {name}, you are {age} years old."


def build_service_handler():
    # build a method handler
    method_handler = RpcMethodHandler.unary(
        GreeterServiceServicer().say_hello,
        method_name="unary",
        request_deserializer=request_deserializer,
        response_serializer=response_serializer,
    )
    # build a service handler
    service_handler = RpcServiceHandler(
        service_name="org.apache.dubbo.samples.serialization.json",
        method_handlers=[method_handler],
    )
    return service_handler


if __name__ == "__main__":
    # build server config
    service_handler = build_service_handler()
    service_config = ServiceConfig(service_handler=service_handler, host="127.0.0.1", port=50051)

    # start the server
    server = dubbo.Server(service_config).start()

    input("Press Enter to stop the server...\n")