Class: Hustle::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/hustle/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(uri, context: {}) ⇒ Runner

methods to be run on the local instance



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# File 'lib/hustle/runner.rb', line 10

def initialize(uri, context: {})
  @uri = uri
  @context = context
end

Instance Attribute Details

#callback_thread ⇒ Object

Returns the value of attribute callback_thread.



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# File 'lib/hustle/runner.rb', line 6

def callback_thread
  @callback_thread
end

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/hustle/runner.rb', line 5

def context
  @context
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/hustle/runner.rb', line 5

def pid
  @pid
end

#uri ⇒ Object (readonly)

Returns the value of attribute uri.



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# File 'lib/hustle/runner.rb', line 5

def uri
  @uri
end

Instance Method Details

#proc_to_string(proc) ⇒ Object 



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# File 'lib/hustle/runner.rb', line 51

def proc_to_string(proc)
  code = proc.source
  start = code.index(/(?<=\{| do)/)
  finish = code.rindex(/\}|end/) - 1
  code[start..finish].strip
end

#remote_instance ⇒ Object 



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# File 'lib/hustle/runner.rb', line 15

def remote_instance
  DRbObject.new_with_uri(uri)
end

#remote_instance_ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hustle/runner.rb', line 23

def remote_instance_ready?
  begin
    !remote_instance.uri.nil?
  rescue DRb::DRbConnError
    false
  end
end

#remote_instance_started? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hustle/runner.rb', line 19

def remote_instance_started?
  !pid.nil?
end

#run(code_string) ⇒ Object 



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# File 'lib/hustle/runner.rb', line 64

def run(code_string)
  begin
    eval code_string, binding
  rescue Exception => e
    e
  end
end

#run_remote(context: {}, &block) ⇒ Object 



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# File 'lib/hustle/runner.rb', line 45

def run_remote(context: {}, &block)
  sleep 0 while !remote_instance_ready?
  code_string = proc_to_string(block)
  remote_instance.run code_string
end

#start_remote_instance ⇒ Object 



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# File 'lib/hustle/runner.rb', line 31

def start_remote_instance
  return if remote_instance_started?
  @pid = fork do
    DRb.start_service uri, self
    DRb.thread.join
  end
  Process.detach pid
  pid
end

#stop ⇒ Object

methods to be run on the remote instance



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# File 'lib/hustle/runner.rb', line 60

def stop
  DRb.stop_service
end

#stop_remote_instance ⇒ Object 



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# File 'lib/hustle/runner.rb', line 41

def stop_remote_instance
  remote_instance.stop
end