| # 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. |
| require 'avro' |
| require 'webrick' |
| |
| MAIL_PROTOCOL_JSON = <<-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" |
| } |
| } |
| } |
| JSON |
| |
| MAIL_PROTOCOL = Avro::Protocol.parse(MAIL_PROTOCOL_JSON) |
| |
| class MailResponder < Avro::IPC::Responder |
| def initialize |
| super(MAIL_PROTOCOL) |
| end |
| |
| def call(message, request) |
| if message.name == 'send' |
| request_content = request['message'] |
| "Sent message to #{request_content['to']} from #{request_content['from']} with body #{request_content['body']}" |
| elsif message.name == 'replay' |
| 'replay' |
| end |
| end |
| end |
| |
| class MailHandler < WEBrick::HTTPServlet::AbstractServlet |
| def do_POST(req, resp) |
| responder = MailResponder.new |
| call_request = Avro::IPC::FramedReader.new(StringIO.new(req.body)).read_framed_message |
| unframed_resp = responder.respond(call_request) |
| writer = Avro::IPC::FramedWriter.new(StringIO.new) |
| writer.write_framed_message(unframed_resp) |
| resp.body = writer.to_s |
| end |
| end |
| |
| if $0 == __FILE__ |
| server = WEBrick::HTTPServer.new(:Host => 'localhost', :Port => 9090) |
| server.mount '/', MailHandler |
| trap("INT") { server.shutdown } |
| server.start |
| end |