heron/shell/src/python/handlers/pidhandler.py

#!/usr/bin/env python
# -*- encoding: utf-8 -*-

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#  to you under the Apache License, Version 2.0 (the
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#
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''' pidhandler.py '''
import json
import tornado.web

from heron.shell.src.python import utils

class PidHandler(tornado.web.RequestHandler):
  """
  Responsible for getting the process ID for an instance.
  """

  # pylint: disable=attribute-defined-outside-init
  @tornado.web.asynchronous
  def get(self, instance_id):
    ''' get method '''
    self.content_type = 'application/json'
    self.write(json.dumps(utils.chain([
        ['ps', 'auxwwww'],
        ['grep', instance_id],
        ['grep', 'java'],
        ['awk', '\'{print $2}\'']])).strip())
    self.finish()