Class: Distributor::Multiplexer

Inherits:
Object
  • Object
show all
Defined in:
lib/distributor/multiplexer.rb

Instance Method Summary collapse

Constructor Details

#initialize(output) ⇒ Multiplexer

Returns a new instance of Multiplexer.



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# File 'lib/distributor/multiplexer.rb', line 7

def initialize(output)
  @output  = output
  @readers = Hash.new { |hash,key| hash[key] = StringIO.new }
  @writers = Hash.new { |hash,key| hash[key] = StringIO.new }

  @output.sync = true
end

Instance Method Details

#close(ch) ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 43

def close(ch)
  output 0, Distributor::OkJson.encode({ "command" => "close", "ch" => ch })
rescue IOError
end

#generate_id ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 48

def generate_id
  id = "#{Time.now.to_f}-#{rand(10000)}"
end

#input(io) ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 30

def input(io)
  ch, data = Distributor::Packet.parse(io)
  return if ch.nil?
  writer(ch).write data
rescue IOError
  output 0, Distributor::OkJson.encode({ "command" => "close", "ch" => ch })
end

#output(ch, data) ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 38

def output(ch, data)
  Distributor::Packet.write(@output, ch, data)
rescue Errno::EPIPE
end

#reader(ch) ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 22

def reader(ch)
  @readers[ch]
end

#reserve(ch = nil) ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 15

def reserve(ch=nil)
  ch ||= @readers.keys.length
  raise "channel already taken: #{ch}" if @readers.has_key?(ch)
  @readers[ch], @writers[ch] = IO.pipe
  ch
end

#writer(ch) ⇒ Object 



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# File 'lib/distributor/multiplexer.rb', line 26

def writer(ch)
  @writers[ch]
end