141 lines
4.6 KiB
Python
141 lines
4.6 KiB
Python
#
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# Copyright (C) 2017 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import logging
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import socket
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import time
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import uuid
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import httplib2
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from googleapiclient import errors
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from host_controller import invocation_thread
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from host_controller.tradefed import remote_operation
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from host_controller.tfc import command_attempt
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class HostController(object):
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"""The class that relays commands between a TradeFed host and clusters.
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Attributes:
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_remote_client: The RemoteClient which runs commands.
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_tfc_client: The TfcClient from which the command tasks are leased.
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_hostname: A string, the name of the TradeFed host.
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_cluster_ids: A list of strings, the cluster IDs for leasing tasks.
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_invocation_threads: The list of running InvocationThread.
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"""
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def __init__(self, remote_client, tfc_client, hostname, cluster_ids):
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"""Initializes the attributes."""
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self._remote_client = remote_client
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self._tfc_client = tfc_client
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self._hostname = hostname
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self._cluster_ids = cluster_ids
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self._invocation_threads = []
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@property
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def hostname(self):
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"""Returns the name of the host."""
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return self._hostname
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def _JoinInvocationThreads(self):
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"""Removes terminated threads from _invocation_threads."""
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alive_threads = []
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for inv_thread in self._invocation_threads:
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inv_thread.join(0)
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if inv_thread.is_alive():
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alive_threads.append(inv_thread)
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self._invocation_threads = alive_threads
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def _CreateInvocationThread(self, task):
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"""Creates an invocation thread from a command task.
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Args:
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task: The CommandTask object.
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Returns:
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An InvocationThread.
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"""
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attempt_id = uuid.uuid4()
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attempt = command_attempt.CommandAttempt(
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task.task_id, attempt_id,
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self._hostname, task.device_serials[0])
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inv_thread = invocation_thread.InvocationThread(
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self._remote_client, self._tfc_client, attempt,
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task.command_line.split(), task.device_serials)
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return inv_thread
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def ListDevices(self):
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"""Lists present devices on the host.
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Returns:
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A list of DeviceInfo.
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"""
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devices = self._remote_client.ListDevices()
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return [dev for dev in devices if not dev.IsStub()]
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def ListAvailableDevices(self):
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"""Lists available devices for command tasks.
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Returns:
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A list of DeviceInfo.
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"""
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self._JoinInvocationThreads()
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allocated_serials = set()
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for inv_thread in self._invocation_threads:
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allocated_serials.update(inv_thread.device_serials)
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present_devices = self.ListDevices()
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return [dev for dev in present_devices if
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dev.IsAvailable() and
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dev.device_serial not in allocated_serials]
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def LeaseCommandTasks(self):
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"""Leases command tasks and creates threads to execute them.
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Returns:
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A list of CommandTask. The leased command tasks.
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"""
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available_devices = self.ListAvailableDevices()
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if not available_devices:
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return []
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tasks = self._tfc_client.LeaseHostTasks(
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self._cluster_ids[0], self._cluster_ids[1:],
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self._hostname, available_devices)
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for task in tasks:
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inv_thread = self._CreateInvocationThread(task)
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inv_thread.daemon = True
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inv_thread.start()
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self._invocation_threads.append(inv_thread)
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return tasks
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def Run(self, poll_interval):
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"""Starts polling TFC for tasks.
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Args:
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poll_interval: The poll interval in seconds.
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"""
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while True:
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try:
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self.LeaseCommandTasks()
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except (socket.error,
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remote_operation.RemoteOperationException,
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httplib2.HttpLib2Error,
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errors.HttpError) as e:
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logging.exception(e)
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time.sleep(poll_interval)
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