ruby - 建议在 Goliath 中使用的 Redis 驱动程序？

Question

在 EventMachine 中建立 Redis 连接似乎有多种选择，我很难理解它们之间的核心区别。

我的目标是在 Goliath 内实现 Redis

我现在建立连接的方式是通过em-synchrony:

require 'em-synchrony'
require 'em-synchrony/em-redis'

config['redis'] = EventMachine::Synchrony::ConnectionPool.new(:size => 20) do 
  EventMachine::Protocols::Redis.connect(:host => 'localhost', :port => 6379)
end 

上述方法与使用 em-hiredis 之类的方法有什么区别？

如果我将 Redis 用于集合和基本键:值存储，em-redis 是适合我的场景的最佳解决方案吗？

Answer 1

我们在 Goliath 内部非常成功地使用了 em-hiredis。以下是我们如何对发布进行编码的示例:

配置/example_api.rb

# These give us direct access to the redis connection from within the API
config['redisUri'] = 'redis://localhost:6379/0'
config['redisPub'] ||= EM::Hiredis.connect('')

example_api.rb

class ExampleApi < Goliath::API

  use Goliath::Rack::Params             # parse & merge query and body parameters
  use Goliath::Rack::Formatters::JSON   # JSON output formatter
  use Goliath::Rack::Render             # auto-negotiate response format

  def response(env)
    env.logger.debug "\n\n\nENV: #{env['PATH_INFO']}"
    env.logger.debug "REQUEST: Received"
    env.logger.debug "POST Action received: #{env.params} "

    #processing of requests from browser goes here

    resp =
      case env.params["action"]
      when 'SOME_ACTION'        then process_action(env)
      when 'ANOTHER_ACTION'     then process_another_action(env)
      else
        # skip
      end

    env.logger.debug "REQUEST: About to respond with: #{resp}"

    [200, {'Content-Type' => 'application/json', 'Access-Control-Allow-Origin' => "*"}, resp]
  end

  # process an action
  def process_action(env)
    # extract message data
    data = Hash.new
    data["user_id"], data["object_id"] = env.params['user_id'], env.params['object_id']

        publishData = { "action"   => 'SOME_ACTION_RECEIVED',
                        "data" => data }

        redisPub.publish("Channel_1", Yajl::Encoder.encode(publishData))

      end 
    end 
    return data
  end

  # process anothr action
  def process_another_action(env)
    # extract message data
    data = Hash.new
    data["user_id"], data["widget_id"] = env.params['user_id'], env.params['widget_id']

        publishData = { "action"   => 'SOME_OTHER_ACTION_RECEIVED',
                        "data" => data }
        redisPub.publish("Channel_1", Yajl::Encoder.encode(publishData))

      end 
    end 
    return data
  end
end

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