Class: Raptor::Http2::Writer

Inherits:
Object
  • Object
show all
Defined in:
lib/raptor/http2.rb,
sig/generated/raptor/http2.rbs

Overview

Serialises concurrent frame writes on a single HTTP/2 connection so exactly one thread is writing at any moment.

Constant Summary collapse

IDLE =

Returns:

  • (::Symbol) 
:idle

Instance Method Summary collapse

Constructor Details

#initialize(write_timeout:) ⇒ Writer

Creates a new Writer.

Parameters:



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# File 'lib/raptor/http2.rb', line 31

def initialize(write_timeout:)
  @state = Atom.new(IDLE)
  @write_timeout = write_timeout
end

Instance Method Details

#write_frames(socket, frames) ⇒ void

This method returns an undefined value.

Writes frames to the socket, coordinating with concurrent writers so that exactly one thread is actively writing at any time.

Parameters:

  • socket (OpenSSL::SSL::SSLSocket) —

    the connection socket

  • frames (Array<String>) —

    frame bytes to write in order



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# File 'lib/raptor/http2.rb', line 44

def write_frames(socket, frames)
  return if !frames || frames.empty?

  claimed = false
  @state.swap do |current|
    if current.equal?(IDLE)
      claimed = true
      frames
    else
      claimed = false
      current + frames
    end
  end

  return unless claimed

  loop do
    pending = nil
    @state.swap do |current|
      pending = current
      current.empty? ? IDLE : []
    end

    break if pending.empty?

    pending.each do |frame|
      Http.socket_write(socket, frame, timeout: @write_timeout) rescue nil
    end
  end
end