Class: RedisRpc::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/redis_rpc/client.rb

Instance Method Summary collapse

Constructor Details

#initialize(url, sub_channel, pub_channel, level: Logger::WARN) ⇒ Client

Returns a new instance of Client.



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# File 'lib/redis_rpc/client.rb', line 11

def initialize(url, sub_channel, pub_channel, level: Logger::WARN)
  @redis = Redis.new(url: url)
  @sub_channel = sub_channel
  @pub_channel = pub_channel
  @res = Response.new(Redis.new(url: url), pub_channel)
  @callback = Callback.new
  init_log(level)
  exec
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(m, *args, &block) ⇒ Object 



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# File 'lib/redis_rpc/client.rb', line 65

def method_missing(m, *args, &block)
  request = {
    method: m,
    params: args,
    uuid: SecureRandom.uuid
  }
  @callback.push(request[:uuid], block)
  @res.publish(request)
end

Instance Method Details

#exec ⇒ Object 



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# File 'lib/redis_rpc/client.rb', line 21

def exec
  @thread = Thread.new do
    begin
      @redis.subscribe(@sub_channel, RedisRpc::EXCEPTION_CHANNEL) do |on|
        on.subscribe do |channel, subscriptions|
          @logger.info("Subscribed to ##{channel} (#{subscriptions} subscriptions)")
        end

        on.message do |channel, args|
          @logger.info("##{channel}: #{args}")
          case channel.to_sym
          when RedisRpc::EXCEPTION_CHANNEL
            @logger.error("exception: #{args}")
          else
            begin
              @callback.exec_callback(args)
            rescue Exception => e
              @logger.error(e.message.to_s)
            end
          end
        end
        on.unsubscribe do |channel, subscriptions|
          @logger.info("Unsubscribed from ##{channel} (#{subscriptions} subscriptions)")
        end
      end
    rescue Redis::BaseConnectionError => error
      @logger.error("#{error}, retrying in 30s")
      sleep 30
      retry
    end
  end
end

#init_log(level) ⇒ Object 



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# File 'lib/redis_rpc/client.rb', line 54

def init_log(level)
  if defined?(Rails)
    @logger = Rails.logger
  else
    require 'logger'
    @logger = ::Logger.new(STDOUT)
    @logger.level = level
  end
  @logger
end