ironic-python-agent/ironic_python_agent/api/controllers/v1/status.py

# Copyright 2014 Rackspace, Inc.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

from ironic_lib import metrics_utils
import pecan
from pecan import rest
from wsme import types
from wsmeext import pecan as wsme_pecan

from ironic_python_agent.api.controllers.v1 import base


class AgentStatus(base.APIBase):
    """An object representing an agent instance's status."""

    started_at = base.MultiType(float)
    version = types.text

    @classmethod
    def from_agent_status(cls, status):
        """Convert an object representing agent status to an AgentStatus.

        :param status: An :class:`ironic_python_agent.agent.
                       IronicPythonAgentStatus` object.
        :returns: An :class:`ironic_python_agent.api.controllers.v1.status.
                  AgentStatus` object.
        """
        instance = cls()
        for field in ('started_at', 'version'):
            setattr(instance, field, getattr(status, field))
        return instance


class StatusController(rest.RestController):
    """Controller for getting agent status."""

    @wsme_pecan.wsexpose(AgentStatus)
    def get_all(self):
        """Get current status of the running agent."""
        with metrics_utils.get_metrics_logger(__name__).timer('get_all'):
            agent = pecan.request.agent
            status = agent.get_status()
            return AgentStatus.from_agent_status(status)