| #!/usr/bin/env python |
| # |
| # Copyright (c) 2013 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. |
| |
| """Sends a heart beat pulse to the currently online Android devices. |
| This heart beat lets the devices know that they are connected to a host. |
| """ |
| # pylint: disable=W0702 |
| |
| import sys |
| import time |
| |
| import devil_chromium |
| from devil.android import device_utils |
| |
| PULSE_PERIOD = 20 |
| |
| def main(): |
| devil_chromium.Initialize() |
| |
| while True: |
| try: |
| devices = device_utils.DeviceUtils.HealthyDevices(blacklist=None) |
| for d in devices: |
| d.RunShellCommand(['touch', '/sdcard/host_heartbeat'], |
| check_return=True) |
| except: |
| # Keep the heatbeat running bypassing all errors. |
| pass |
| time.sleep(PULSE_PERIOD) |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |