Class: Manceps::Transport::Stdio

Inherits:
Base
  • Object
show all
Defined in:
lib/manceps/transport/stdio.rb

Overview

Stdio transport: communicates with a local subprocess via stdin/stdout.

Instance Method Summary collapse

Methods inherited from Base

#on_notification, #request_streaming

Constructor Details

#initialize(command, args: [], env: {}) ⇒ Stdio

Returns a new instance of Stdio.



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# File 'lib/manceps/transport/stdio.rb', line 10

def initialize(command, args: [], env: {})
  super()
  @command = command
  @args = args
  @env = env
  @stdin = nil
  @stdout = nil
  @stderr = nil
  @wait_thread = nil
  @mutex = Mutex.new
  @notification_callback = nil
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/manceps/transport/stdio.rb', line 66

def close
  return unless @wait_thread

  begin
    @stdin&.close
  rescue StandardError
    nil
  end

  if @wait_thread.alive?
    begin
      Process.kill('TERM', @wait_thread.pid)
    rescue StandardError
      nil
    end

    unless @wait_thread.join(5)
      begin
        Process.kill('KILL', @wait_thread.pid)
      rescue StandardError
        nil
      end
      begin
        @wait_thread.join(1)
      rescue StandardError
        nil
      end
    end
  end

  begin
    @stdout&.close
  rescue StandardError
    nil
  end
  begin
    @stderr&.close
  rescue StandardError
    nil
  end
  @stdin = nil
  @stdout = nil
  @stderr = nil
  @wait_thread = nil
end

#listen(&block) ⇒ Object

Raises:



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# File 'lib/manceps/transport/stdio.rb', line 50

def listen(&block)
  raise ConnectionError, 'Stdio transport not open' unless @stdout

  loop do
    line = @stdout.gets
    break if line.nil?

    parsed = begin
      JSON.parse(line)
    rescue StandardError
      next
    end
    block.call(parsed) if parsed['method']
  end
end

#notify(body) ⇒ Object 



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# File 'lib/manceps/transport/stdio.rb', line 40

def notify(body)
  @mutex.synchronize do
    write_message(body)
  end
end

#open ⇒ Object 



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# File 'lib/manceps/transport/stdio.rb', line 23

def open
  close if @wait_thread # Clean up any existing process

  @stdin, @stdout, @stderr, @wait_thread = Open3.popen3(@env, @command, *@args)

  at_exit { close }

  self
end

#request(body) ⇒ Object 



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# File 'lib/manceps/transport/stdio.rb', line 33

def request(body)
  @mutex.synchronize do
    write_message(body)
    read_response
  end
end

#terminate_session(_session_id) ⇒ Object 



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# File 'lib/manceps/transport/stdio.rb', line 46

def terminate_session(_session_id)
  # No-op for stdio -- session ends when the process exits
end