基于ruby-protobuf的rpc示例

1, 安装ruby-protobuf

gem install ruby_protobuf

2, 定义rpc service的rpc.proto文件

package demo;

message SearchRequest {
  required string keyword = 1;
}

message SearchResponse {
  required string result = 1;
}

service RpcService {
  rpc Search (SearchRequest) returns (SearchResponse);
}

3, 编译

rprotoc rpc.proto

4, 完成service和client代码
rpc_service.rb

require 'protobuf/rpc/server'
require 'protobuf/rpc/handler'
require 'rpc.pb'

class Demo::SearchHandler < Protobuf::Rpc::Handler
  request Demo::SearchRequest
  response Demo::SearchResponse
  
  def self.process_request(request, response)
    if request.keyword == 'google'
      response.result = 'www.google.com'
    elsif request.keyword == 'freewheel'
      response.result = 'www.freewheel.tv'
    else
      response.result = ''
    end
  end
end

class Demo::RpcService < Protobuf::Rpc::Server
  def setup_handlers
    @handlers = {
      :search => Demo::SearchHandler,
    } 
  end
end

client_search.rb

#!/usr/bin/env ruby
require 'protobuf/rpc/client'
require 'rpc.pb'

# build request
request1 = Demo::SearchRequest.new
request1.keyword = 'google'
request2 = Demo::SearchRequest.new
request2.keyword = 'freewheel'

# create blunk response
response1 = Demo::SearchResponse.new
response2 = Demo::SearchResponse.new

# execute rpc
Protobuf::Rpc::Client.new('localhost', 9999).call :search, request1, response1
Protobuf::Rpc::Client.new('localhost', 9999).call :search, request2, response2

p response1.result
p response2.result

5, 运行
启动Service

ruby start_rpc_service
// :port参数名改为:Port

调用Client

ruby client_search.rb
// result
"www.google.com"
"www.freewheel.tv"