Class: Roma::Romad

Inherits:
Object
  • Object
show all
Includes:
AsyncProcess, WriteBehindProcess
Defined in:
lib/roma/romad.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from WriteBehindProcess

push, #start_wb_process, #stop_wb_process, #wb_get_current_file_path, #wb_get_path, #wb_get_stat, #wb_rotate

Methods included from AsyncProcess

queue, queue_latency, #start_async_process

Constructor Details

#initialize(argv = nil) ⇒ Romad

Returns a new instance of Romad.



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# File 'lib/roma/romad.rb', line 29

def initialize(argv = nil)
  @stats = Roma::Stats.instance
  @startup = true
  options(argv)
  initialize_stats
  initialize_connection
  initialize_logger
  initialize_rttable
  initialize_storages
  initialize_handler
  initialize_plugin
  initialize_wb_writer
end

Instance Attribute Details

#eventloop ⇒ Object

Returns the value of attribute eventloop.



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# File 'lib/roma/romad.rb', line 26

def eventloop
  @eventloop
end

#rttable ⇒ Object (readonly)

Returns the value of attribute rttable.



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# File 'lib/roma/romad.rb', line 22

def rttable
  @rttable
end

#startup ⇒ Object

Returns the value of attribute startup.



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# File 'lib/roma/romad.rb', line 27

def startup
  @startup
end

#stats ⇒ Object (readonly)

Returns the value of attribute stats.



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# File 'lib/roma/romad.rb', line 23

def stats
  @stats
end

#storages ⇒ Object (readonly)

Returns the value of attribute storages.



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# File 'lib/roma/romad.rb', line 21

def storages
  @storages
end

#wb_writer ⇒ Object (readonly)

Returns the value of attribute wb_writer.



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# File 'lib/roma/romad.rb', line 24

def wb_writer
  @wb_writer
end

Instance Method Details

#daemon? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/roma/romad.rb', line 159

def daemon?; @stats.daemon; end

#start ⇒ Object 



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# File 'lib/roma/romad.rb', line 43

def start
  # config version check
  if !Config.const_defined?(:VERSION)
    @log.error("ROMA FAIL TO BOOT! : config.rb's version is too old.")
    exit
  elsif Config::VERSION != Roma::VERSION
    if /(\d+)\.(\d+)\.(\d+)/ =~ Config::VERSION
      version_config = ($1.to_i << 16) + ($2.to_i << 8) + $3.to_i
    end
    if /(\d+)\.(\d+)\.(\d+)/ =~ Roma::VERSION
      version_roma = ($1.to_i << 16) + ($2.to_i << 8) + $3.to_i
    end

    if version_config == version_roma
      @log.info("This version is development version.")
    else 
      @log.error("ROMA FAIL TO BOOT! : config.rb's version is differ from current ROMA version.")
      exit
    end
  end

  if node_check(@stats.ap_str)
    @log.error("#{@stats.ap_str} is already running.")
    return
  end

  @storages.each{|hashname,st|
    st.opendb
  }

  start_async_process
  start_wb_process
  timer

  if @stats.join_ap
    AsyncProcess::queue.push(AsyncMessage.new('start_join_process'))
  end

  # select a kind of system call
  if Config.const_defined?(:CONNECTION_USE_EPOLL) && Config::CONNECTION_USE_EPOLL
    @log.info("use an epoll")
    EM.epoll
    if Config.const_defined?(:CONNECTION_DESCRIPTOR_TABLE_SIZE)
      EM.set_descriptor_table_size(Config::CONNECTION_DESCRIPTOR_TABLE_SIZE)
    end
  else
    @log.info("use a select")
  end

  @eventloop = true
  while(@eventloop)
    @eventloop = false
    begin
      # initialize an instance of connections as restarting of an evantmachine
      Event::Handler::connections.each_key{|k|
        begin
          k.close_connection
        rescue Exception => e
          @log.error("#{e}\n#{$@}")
        end
      }
      Event::Handler::connections.clear

      EventMachine::run do
        EventMachine.start_server('0.0.0.0', @stats.port,
                                  Roma::Command::Receiver,
                                  @storages, @rttable)
        # a management of connections lives
        EventMachine::add_periodic_timer( 10 ) {
          if Event::Handler::connection_expire_time > 0
            dellist = []
            Event::Handler::connections.each{|k,v|
              if k.connected == false || k.last_access == nil
                dellist << k
              elsif k.last_access < Time.now - Event::Handler::connection_expire_time
                begin
                  k.close_connection
                  if k.addr
                    @log.info("connection expired from #{k.addr}:#{k.port},lastcmd = #{k.lastcmd}")
                  else
                    @log.info("connection expired in irregular connection")
                    dellist << k
                  end
                rescue Exception => e
                  @log.error("#{e}\n#{$@}")
                  dellist << k
                end
              end
            }
            dellist.each{|k|
              @log.info("delete connection lastcmd = #{k.lastcmd}")
              Event::Handler::connections.delete(k)
            }
          end
        }

        @log.info("Now accepting connections on address #{@stats.address}, port #{@stats.port}")
      end
    rescue Interrupt => e
      if daemon?
        @log.error("#{e.inspect}\n#{$@}")
        retry
      else
        $stderr.puts "#{e.inspect}"
      end
    rescue Exception => e
      @log.error("#{e}\n#{$@}")
      @log.error("restart an eventmachine")
      retry
    end
  end
  stop_async_process
  stop_wb_process
  stop
end

#stop_clean_up ⇒ Object 



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# File 'lib/roma/romad.rb', line 161

def stop_clean_up
  @stats.last_clean_up = Time.now
  while(@stats.run_storage_clean_up)
    @log.info("Storage clean up process will be stop.")
    @storages.each_value{|st| st.stop_clean_up}
    sleep 0.005
  end
end