Source code for camcops_server.camcops_windows_service

#!/usr/bin/env python

"""
camcops_server/camcops_windows_service.py

===============================================================================

    Copyright (C) 2012-2019 Rudolf Cardinal (rudolf@pobox.com).

    This file is part of CamCOPS.

    CamCOPS is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    CamCOPS is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with CamCOPS. If not, see <http://www.gnu.org/licenses/>.

===============================================================================

**Run CamCOPS and its associated back-end tools as a Windows service.**

"""

import os
import logging
import sys

from cardinal_pythonlib.winservice import (
    ProcessDetails,
    generic_service_main,
    WindowsService,
)

from camcops_server.cc_modules.cc_baseconstants import ENVVAR_CONFIG_FILE

log = logging.getLogger(__name__)

CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
WINSERVICE_LOGDIR_ENVVAR = "CAMCOPS_WINSERVICE_LOGDIR"


# =============================================================================
# Windows service framework
# =============================================================================

[docs]class CamcopsWinService(WindowsService): """ Windows service class for CamCOPS. """ # you can NET START/STOP the service by the following name _svc_name_ = "CamCOPS" # this text shows up as the service name in the Service # Control Manager (SCM) _svc_display_name_ = "CamCOPS service" # this text shows up as the description in the SCM _svc_description_ = ( "Runs web server, scheduler, and worker processes for CamCOPS" ) # how to launch? _exe_name_ = sys.executable # python.exe in the virtualenv _exe_args_ = f'"{os.path.realpath(__file__)}"' # this script # ------------------------------------------------------------------------- # The service # -------------------------------------------------------------------------
[docs] def service(self) -> None: """ Run the Windows service. - Reads the log directory from the environment variable ``CAMCOPS_WINSERVICE_LOGDIR``. - Checks that the environment variable ``CAMCOPS_CONFIG_FILE`` is set. - Launches the CherryPy web server. - Launches the Celery scheduler. - Launches the Celery workers. """ # Read from environment try: logdir = os.environ[WINSERVICE_LOGDIR_ENVVAR] except KeyError: raise ValueError( f"Must specify {WINSERVICE_LOGDIR_ENVVAR} " f"system environment variable") if ENVVAR_CONFIG_FILE not in os.environ: raise ValueError( f"Must specify {ENVVAR_CONFIG_FILE} " f"system environment variable") # Define processes camcops_server = os.path.join(CURRENT_DIR, "camcops_server.py") weblog = os.path.join(logdir, "camcops_webserver.log") schedulerlog = os.path.join(logdir, "camcops_scheduler.log") workerlog = os.path.join(logdir, "camcops_workers.log") procdetails = [ ProcessDetails( name="CherryPy web server", procargs=[ sys.executable, camcops_server, "serve_cherrypy", ], logfile_out=weblog, logfile_err=weblog, ), ProcessDetails( name="Celery scheduler", procargs=[ sys.executable, camcops_server, "launch_scheduler", ], logfile_out=schedulerlog, logfile_err=schedulerlog, ), ProcessDetails( name="Celery workers", procargs=[ sys.executable, camcops_server, "launch_workers", ], logfile_out=workerlog, logfile_err=workerlog, ), ] # Run processes self.run_processes(procdetails)
# ============================================================================= # Main # =============================================================================
[docs]def main(): """ Command-line entry point. """ # Called as an entry point (see setup.py). logging.basicConfig(level=logging.DEBUG) generic_service_main(CamcopsWinService, 'CamcopsWinService')
if __name__ == '__main__': main()