Eventmachine talk - Dec 2007 - connection_completed never called afterpopen

From: Michael S. Fischer
>
> class Executor < EventMachine::Connection
>   attr_accessor :command, :param
>
>   def self.popen(command, param)
>     conn = EventMachine::popen(command, self) do |conn|
>       conn.command = command
>       conn.param = param
>     end
>   end
>
>   def post_init
>     puts "#{@param}" # Race condition: @param not defined yet
-> exception thrown
>   end
> end
For what it''s worth, in cases like this I typically add a custom
init method, #owner_init:

class Executor < EventMachine::Connection
  attr_accessor :command, :param

  def self.popen(command, param)
    conn = EventMachine::popen(command, self) do |conn|
      conn.owner_init(command, param)
    end
  end

  def owner_init(command, param)
    @command = command
    @param = param
    # ... do whatever other init...
  end
end


Regards,

Bill

On Dec 2, 2007 11:32 AM, Bill Kelly <billk at cts.com> wrote:
> For what it''s worth, in cases like this I typically add a custom
> init method, #owner_init:
>
> class Executor < EventMachine::Connection
>  attr_accessor :command, :param
>
>  def self.popen(command, param)
>    conn = EventMachine::popen(command, self) do |conn|
>      conn.owner_init(command, param)
>    end
>  end
>
>  def owner_init(command, param)
>    @command = command
>    @param = param
>    # ... do whatever other init...
>  end

In my particular application, I want to use the parameters passed in the
block to popen only after the connection to the pipe was successfully
established (i.e., to output a message to a log at an appropriate time) but
before any data is received.

Best regards,

--Michael
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Maybe save them then output them later?

On Dec 2, 2007 5:06 PM, Michael S. Fischer <michael at dynamine.net>
wrote:
> On Dec 2, 2007 11:32 AM, Bill Kelly <billk at cts.com> wrote:
>
> > For what it''s worth, in cases like this I typically add a
custom
> > init method, #owner_init:
> >
> >
> > class Executor < EventMachine::Connection
> >  attr_accessor :command, :param
> >
> >  def self.popen (command, param)
> >    conn = EventMachine::popen(command, self) do |conn|
> >      conn.owner_init(command, param)
> >    end
> >  end
> >
> >  def owner_init(command, param)
> >    @command = command
> >    @param = param
> >    # ... do whatever other init...
> >  end
>
> In my particular application, I want to use the parameters passed in the
> block to popen only after the connection to the pipe was successfully
> established ( i.e., to output a message to a log at an appropriate time)
but
> before any data is received.
>
> Best regards,
>
> --Michael
>
>
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> Eventmachine-talk mailing list
> Eventmachine-talk at rubyforge.org
> http://rubyforge.org/mailman/listinfo/eventmachine-talk
>


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-Roger Pack
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love, and of a sound mind" -- 2 Timothy 1:7