Class: Async::HTTP::Body::Writable

Inherits:
Readable
  • Object
show all
Defined in:
lib/async/http/body/writable.rb

Overview

A dynamic body which you can write to and read from.

Instance Method Summary collapse

Methods inherited from Readable

#close, #each, #join

Constructor Details

#initialize ⇒ Writable

Returns a new instance of Writable.



30
31
32
33
34
35
36
37
 
# File 'lib/async/http/body/writable.rb', line 30

def initialize
  @queue = Async::Queue.new
  
  @count = 0
  
  @finished = false
  @stopped = nil
end

Instance Method Details

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


39
40
41
 
# File 'lib/async/http/body/writable.rb', line 39

def empty?
  @finished
end

#finish ⇒ Object

Signal that output has finished.



71
72
73
 
# File 'lib/async/http/body/writable.rb', line 71

def finish
  @queue.enqueue(nil)
end

#inspect ⇒ Object 



75
76
77
 
# File 'lib/async/http/body/writable.rb', line 75

def inspect
  "\#<#{self.class} #{@count} chunks written>"
end

#read ⇒ Object

Read the next available chunk.



44
45
46
47
48
49
50
51
52
 
# File 'lib/async/http/body/writable.rb', line 44

def read
  return if @finished
  
  unless chunk = @queue.dequeue
    @finished = true
  end
  
  return chunk
end

#stop(error) ⇒ Object 



54
55
56
 
# File 'lib/async/http/body/writable.rb', line 54

def stop(error)
  @stopped = error
end

#write(chunk) ⇒ Object

Write a single chunk to the body. Signal completion by calling ‘#finish`.



59
60
61
62
63
64
65
66
67
68
 
# File 'lib/async/http/body/writable.rb', line 59

def write(chunk)
  if @stopped
    raise @stopped
  end
  
  # TODO should this yield if the queue is full?
  
  @count += 1
  @queue.enqueue(chunk)
end