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#!/usr/bin/env python3
#
# Copyright (C) 2016 The Android Open Source Project
#
# 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.
import logging
import mobly.controllers.android_device_lib.sl4a_client as sl4a_client
from mobly.controllers.android_device import AndroidDevice
from mobly.controllers.android_device_lib.adb import AdbError
from mobly.controllers.android_device_lib.jsonrpc_client_base import AppRestoreConnectionError
from mobly.controllers.android_device_lib.services.sl4a_service import Sl4aService
class FakeFuture:
"""
A fake Future object to override default mobly behavior
"""
def set_result(self, result):
logging.debug("Setting fake result {}".format(result))
def setup_sl4a(device: AndroidDevice, server_port: int, forwarded_port: int):
"""
A method that setups up SL4A instance on mobly
:param device: an AndroidDevice instance
:param server_port: Preferred server port used by SL4A on Android device
:param forwarded_port: Preferred server port number forwarded from Android to
the host PC via adb for SL4A connections
:return: None
"""
sl4a_client._DEVICE_SIDE_PORT = server_port
sl4a_client._APP_START_WAIT_TIME = 0.5
if device.sl4a is not None:
device.log.error("SL4A is not none when registering")
device.services.register('sl4a', Sl4aService, start_service=False)
# Start the SL4A service and event dispatcher
try:
device.sl4a.start()
except AppRestoreConnectionError as exp:
device.log.debug("AppRestoreConnectionError {}".format(exp))
# Pause the dispatcher, but do not stop the service
try:
device.sl4a.pause()
except AdbError as exp:
device.log.debug("Failed to pause() {}".format(exp))
sl4a_client._APP_START_WAIT_TIME = 2 * 60
# Restart the service with a new host port
device.sl4a.restore_app_connection(port=forwarded_port)
def teardown_sl4a(device: AndroidDevice):
"""
A method to tear down SL4A interface on mobly
:param device: an AndroidDevice instance that already contains SL4a
:return: None
"""
if device.sl4a.is_alive:
# Both self.dut.sl4a and self.dut.sl4a.ed._sl4a are Sl4aClient instances
# If we do not set host_port to None here, host_poart will be removed twice from Android
# The 2nd removal will trigger and exception that spam the test result
# TODO: Resolve this issue in mobly
device.log.info("Clearing host_port to prevent mobly crash {}".format(device.sl4a._sl4a_client.host_port))
device.sl4a._sl4a_client.host_port = None
# Moreover concurrent.Future.set_result() should never be called from thread that is
# waiting for the future. However, mobly calls it and cause InvalidStateError when it
# tries to do that after the thread pool has stopped, overriding it here
# TODO: Resolve this issue in mobly
device.sl4a.ed.poller = FakeFuture()
try:
# Guarded by is_alive internally
device.sl4a.stop()
except AdbError as exp:
device.log.warning("Failed top stop()".format(exp))
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