Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | # |
| 3 | # Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 4 | # Use of this source code is governed by a BSD-style license that can be |
| 5 | # found in the LICENSE file. |
| 6 | |
| 7 | """Sends a heart beat pulse to the currently online Android devices. |
| 8 | This heart beat lets the devices know that they are connected to a host. |
| 9 | """ |
| 10 | # pylint: disable=W0702 |
| 11 | |
| 12 | import sys |
| 13 | import time |
| 14 | |
| 15 | import devil_chromium |
| 16 | from devil.android import device_utils |
| 17 | |
| 18 | PULSE_PERIOD = 20 |
| 19 | |
| 20 | def main(): |
| 21 | devil_chromium.Initialize() |
| 22 | |
| 23 | while True: |
| 24 | try: |
| 25 | devices = device_utils.DeviceUtils.HealthyDevices(blacklist=None) |
| 26 | for d in devices: |
| 27 | d.RunShellCommand(['touch', '/sdcard/host_heartbeat'], |
| 28 | check_return=True) |
| 29 | except: |
| 30 | # Keep the heatbeat running bypassing all errors. |
| 31 | pass |
| 32 | time.sleep(PULSE_PERIOD) |
| 33 | |
| 34 | |
| 35 | if __name__ == '__main__': |
| 36 | sys.exit(main()) |