old_contents: import gevent
  import bottle
  import uuid
  
  class NeutronApiContext(object):
      def __init__(self, request=None, user_token=None):
          self.request = request
          self.user_token = user_token
          self.request_id = str(uuid.uuid4())
      # end __init__
  # end class NeutronApiContext
  
  def get_context():
      return gevent.getcurrent().neutron_api_context
  
  def set_context(api_ctx):
      gevent.getcurrent().neutron_api_context = api_ctx
  
  def clear_context():
      gevent.getcurrent().neutron_api_context = None
  
  def have_context():
      return (hasattr(gevent.getcurrent(), 'neutron_api_context') and
              gevent.getcurrent().neutron_api_context is not None)
  
  def use_context(fn):
      def wrapper(*args, **kwargs):
          if not have_context():
              context_created = True
              user_token = bottle.request.headers.get('X_AUTH_TOKEN',
                  'no user token for %s %s' %(bottle.request.method,
                                              bottle.request.url))
              set_context(NeutronApiContext(
                  request=bottle.request, user_token=user_token))
          else:
              context_created = False
  
          try:
              return fn(*args, **kwargs)
          finally:
              if context_created:
                  clear_context()
      # end wrapper
      return wrapper
  
new_contents: import gevent
  import bottle
  import uuid
  
  class NeutronApiContext(object):
      def __init__(self, request=None, user_token=None):
          self.request = request
          self.user_token = user_token
          self.request_id = request.json['context'].get('request_id', str(uuid.uuid4()))
      # end __init__
  # end class NeutronApiContext
  
  def get_context():
      return gevent.getcurrent().neutron_api_context
  
  def set_context(api_ctx):
      gevent.getcurrent().neutron_api_context = api_ctx
  
  def clear_context():
      gevent.getcurrent().neutron_api_context = None
  
  def have_context():
      return (hasattr(gevent.getcurrent(), 'neutron_api_context') and
              gevent.getcurrent().neutron_api_context is not None)
  
  def use_context(fn):
      def wrapper(*args, **kwargs):
          if not have_context():
              context_created = True
              user_token = bottle.request.headers.get('X_AUTH_TOKEN',
                  'no user token for %s %s' %(bottle.request.method,
                                              bottle.request.url))
              set_context(NeutronApiContext(
                  request=bottle.request, user_token=user_token))
          else:
              context_created = False
  
          try:
              return fn(*args, **kwargs)
          finally:
              if context_created:
                  clear_context()
      # end wrapper
      return wrapper
  
subject: Use request_id forwarded by neutron plugin