make version of ts_mon compatible with appengine

infra_libs/ts_mon/targets.py

-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Classes representing the monitoring interface for tasks or devices."""
-
-
-class Target(object):
-  """Abstract base class for a monitoring target.
-
-  A Target is a "thing" that should be monitored, for example, a device or a
-  process. The majority of the time, a single process will have only a single
-  Target.
-
-  Do not directly instantiate an object of this class.
-  Use the concrete child classes instead:
-  * TaskTarget to monitor a job or tasks running in (potentially) many places;
-  * DeviceTarget to monitor a host machine that may be running a task.
-  """
-  def _populate_target_pb(self, metric):
-    """Populate the 'target' embedded message field of a metric protobuf."""
-    raise NotImplementedError()
-
-
-class DeviceTarget(Target):
-  """Monitoring interface class for monitoring specific hosts or devices."""
-
-  def __init__(self, region, network, hostname):
-    """Create a Target object exporting info about a specific device.
-
-    Args:
-      region (str): physical region in which the device is located.
-      network (str): virtual network on which the device is located.
-      hostname (str): name by which the device self-identifies.
-    """
-    super(DeviceTarget, self).__init__()
-    self._region = region
-    self._network = network
-    self._hostname = hostname
-    self._realm = 'ACQ_CHROME'
-    self._alertable = True
-
-  def _populate_target_pb(self, metric):
-    """Populate the 'network_device' embedded message of a metric protobuf.
-
-    Args:
-      metric (metrics_pb2.MetricsData): the metric proto to be populated.
-    """
-    # Note that this disregards the pop, asn, role, and vendor fields.
-    metric.network_device.metro = self._region
-    metric.network_device.hostgroup = self._network
-    metric.network_device.hostname = self._hostname
-    metric.network_device.realm = self._realm
-    metric.network_device.alertable = self._alertable
-
-
-class TaskTarget(Target):
-  """Monitoring interface class for monitoring active jobs or processes."""
-
-  def __init__(self, service_name, job_name,
-               region, hostname, task_num=0):
-    """Create a Target object exporting info about a specific task.
-
-    Args:
-      service_name (str): service of which this task is a part.
-      job_name (str): specific name of this task.
-      region (str): general region in which this task is running.
-      hostname (str): specific machine on which this task is running.
-      task_num (int): replication id of this task.
-    """
-    super(TaskTarget, self).__init__()
-    self._service_name = service_name
-    self._job_name = job_name
-    self._region = region
-    self._hostname = hostname
-    self._task_num = task_num
-
-  def _populate_target_pb(self, metric):
-    """Populate the 'task' embedded message field of a metric protobuf.
-
-    Args:
-      metric (metrics_pb2.MetricsData): the metric proto to be populated.
-    """
-    metric.task.service_name = self._service_name
-    metric.task.job_name = self._job_name
-    metric.task.data_center = self._region
-    metric.task.host_name = self._hostname
-    metric.task.task_num = self._task_num