Class: Puma::Reactor

Inherits:
Object
  • Object
show all
Defined in:
lib/puma/reactor.rb

Constant Summary collapse

DefaultSleepFor = 
5

Instance Method Summary collapse

Constructor Details

#initialize(server, app_pool) ⇒ Reactor

Returns a new instance of Reactor.



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# File 'lib/puma/reactor.rb', line 7

def initialize(server, app_pool)
  @server = server
  @events = server.events
  @app_pool = app_pool

  @mutex = Mutex.new
  @ready, @trigger = Puma::Util.pipe
  @input = []
  @sleep_for = DefaultSleepFor
  @timeouts = []

  @sockets = [@ready]
end

Instance Method Details

#add(c) ⇒ Object 



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# File 'lib/puma/reactor.rb', line 131

def add(c)
  @mutex.synchronize do
    @input << c
    @trigger << "*"

    if c.timeout_at
      @timeouts << c
      @timeouts.sort! { |a,b| a.timeout_at <=> b.timeout_at }

      calculate_sleep
    end
  end
end

#calculate_sleep ⇒ Object 



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# File 'lib/puma/reactor.rb', line 117

def calculate_sleep
  if @timeouts.empty?
    @sleep_for = DefaultSleepFor
  else
    diff = @timeouts.first.timeout_at.to_f - Time.now.to_f

    if diff < 0.0
      @sleep_for = 0
    else
      @sleep_for = diff
    end
  end
end

#clear! ⇒ Object

Close all watched sockets and clear them from being watched



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# File 'lib/puma/reactor.rb', line 146

def clear!
  begin
    @trigger << "c"
  rescue IOError
  end
end

#run ⇒ Object 



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# File 'lib/puma/reactor.rb', line 21

def run
  sockets = @sockets

  while true
    ready = IO.select sockets, nil, nil, @sleep_for

    if ready and reads = ready[0]
      reads.each do |c|
        if c == @ready
          @mutex.synchronize do
            case @ready.read(1)
            when "*"
              sockets += @input
              @input.clear
            when "c"
              sockets.delete_if do |s|
                if s == @ready
                  false
                else
                  s.close
                  true
                end
              end
            when "!"
              return
            end
          end
        else
          # We have to be sure to remove it from the timeout
          # list or we'll accidentally close the socket when
          # it's in use!
          if c.timeout_at
            @mutex.synchronize do
              @timeouts.delete c
            end
          end

          begin
            if c.try_to_finish
              @app_pool << c
              sockets.delete c
            end

          # The client doesn't know HTTP well
          rescue HttpParserError => e
            c.write_400
            c.close

            sockets.delete c

            @events.parse_error @server, c.env, e
          rescue StandardError => e
            c.write_500
            c.close

            sockets.delete c
          end
        end
      end
    end

    unless @timeouts.empty?
      @mutex.synchronize do
        now = Time.now

        while @timeouts.first.timeout_at < now
          c = @timeouts.shift
          sockets.delete c
          c.close

          break if @timeouts.empty?
        end

        calculate_sleep
      end
    end
  end
ensure
  @trigger.close
  @ready.close
end

#run_in_thread ⇒ Object 



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# File 'lib/puma/reactor.rb', line 103

def run_in_thread
  @thread = Thread.new {
    while true
      begin
        run
        break
      rescue StandardError => e
        STDERR.puts "Error in reactor loop escaped: #{e.message} (#{e.class})"
        puts e.backtrace
      end
    end
  }
end

#shutdown ⇒ Object 



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# File 'lib/puma/reactor.rb', line 153

def shutdown
  begin
    @trigger << "!"
  rescue IOError
  end

  @thread.join
end