Class: Profit::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/profit/server.rb

Constant Summary collapse

METRIC_LIMIT_PER_KEY = 
100

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Server

Returns a new instance of Server.



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# File 'lib/profit/server.rb', line 9

def initialize(options = {})
  @options = {}
  @options[:redis_address] = options[:redis_address] || "127.0.0.1"
  @options[:redis_port]    = options[:redis_port]    || 6379
  @options[:zmq_address]   = options[:zmq_address]   || "tcp://*:5556"
  @options[:pool_size]     = options[:pool_size]     || 10
  @options[:log_path]      = options[:log_path]      || STDOUT
  @options[:log_level]     = options[:log_level]     || :error

  logger.level = log_level
  @ctx = ZMQ::Context.new
  logger.info "Starting profit_server with options: #{@options}"
end

Instance Attribute Details

#ctx ⇒ Object (readonly)

Returns the value of attribute ctx.



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# File 'lib/profit/server.rb', line 5

def ctx
  @ctx
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/profit/server.rb', line 23

def run
  EM.run do

    # startup the EM::Hiredis connections
    spawn_redis_connections

    # gives us a graceful exit
    setup_interrupt_handling

    # this is the entry to message handling
    EM.add_periodic_timer do

      # blocking ZMQ socket
      message = puller.recv || ""

      # take a worker from the pool to save the metric to Redis
      redis_pool.perform do |conn|

        message_hash     = JSON.parse(message)
        metric_key       = ["profit", "metric", message_hash.delete("metric_key")].join(":")

        add_key_response = conn.sadd("profit:keys", metric_key)
        add_key_response.callback { |resp| logger.debug "adding metric key callback: #{resp}" }
        add_key_response.errback  { |resp| logger.error "adding metric key error: #{resp}"}

        push_metric_response = conn.lpush metric_key, message_hash.to_json
        push_metric_response.callback { |resp| logger.debug "push metric callback: #{resp}" }
        push_metric_response.errback  { |resp| logger.error "push metric error: #{resp}"}

        trim_list_response = conn.ltrim(metric_key, 0, METRIC_LIMIT_PER_KEY - 1)
        trim_list_response.callback { |resp| logger.debug "trim list callback: #{resp}" }
        trim_list_response.errback  { |resp| logger.error "trim list error: #{resp}"}
        trim_list_response
      end
    end
  end
end