Class: GH::Parallel

Inherits:
Wrapper show all
Defined in:
lib/gh/parallel.rb

Overview

Public: …

Defined Under Namespace

Classes: Dummy

Instance Attribute Summary collapse

Attributes inherited from Wrapper

#backend, #frontend, #options

Instance Method Summary collapse

Methods inherited from Wrapper

#[], [], double_dispatch, #initialize, #inspect, #load, #prefixed, #reset, wraps

Constructor Details

This class inherits a constructor from GH::Wrapper

Instance Attribute Details

#parallelize ⇒ Object

Returns the value of attribute parallelize.



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# File 'lib/gh/parallel.rb', line 9

def parallelize
  @parallelize
end

Instance Method Details

#connection ⇒ Object 



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# File 'lib/gh/parallel.rb', line 60

def connection
  @connection ||= begin
    layer = backend
    layer = layer.backend until layer.respond_to? :connection
    layer.connection
  end
end

#generate_response(key, response) ⇒ Object 



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# File 'lib/gh/parallel.rb', line 32

def generate_response(key, response)
  return super unless in_parallel?

  dummy = Dummy.new
  @mutex.synchronize { @queue << [dummy, key, response] }
  dummy
end

#in_parallel ⇒ Object 



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# File 'lib/gh/parallel.rb', line 40

def in_parallel
  return yield if in_parallel? || !@parallelize

  was = @in_parallel
  @in_parallel = true
  result = nil
  connection.in_parallel { result = yield }
  @mutex.synchronize do
    @queue.each { |dummy, key, response| dummy.__delegate__ = backend.generate_response(key, response) }
    @queue.clear
  end
  result
ensure
  @in_parallel = was unless was.nil?
end

#in_parallel? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gh/parallel.rb', line 56

def in_parallel?
  @in_parallel
end

#setup ⇒ Object 



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# File 'lib/gh/parallel.rb', line 24

def setup(*)
  @parallelize = true if @parallelize.nil?
  @in_parallel = false
  @mutex = Mutex.new
  @queue = []
  super
end