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__main__.py 1.73 KiB
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import logging, signal, sys, threading
from prometheus_client import start_http_server
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from common.Settings import get_setting
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from common.database.Factory import get_database
from device.service.DeviceService import DeviceService
from device.Config import GRPC_SERVICE_PORT, GRPC_MAX_WORKERS, GRPC_GRACE_PERIOD, LOG_LEVEL, METRICS_PORT

terminate = threading.Event()
logger = None

def signal_handler(signal, frame):
    global terminate, logger
    logger.warning('Terminate signal received')
    terminate.set()

def main():
    global terminate, logger

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    service_port = get_setting('DEVICESERVICE_SERVICE_PORT_GRPC', default=GRPC_SERVICE_PORT)
    max_workers  = get_setting('MAX_WORKERS',                     default=GRPC_MAX_WORKERS )
    grace_period = get_setting('GRACE_PERIOD',                    default=GRPC_GRACE_PERIOD)
    log_level    = get_setting('LOG_LEVEL',                       default=LOG_LEVEL        )
    metrics_port = get_setting('METRICS_PORT',                    default=METRICS_PORT     )

    logging.basicConfig(level=log_level)
    logger = logging.getLogger(__name__)

    signal.signal(signal.SIGINT,  signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)

    logger.info('Starting...')

    # Start metrics server
    start_http_server(metrics_port)

    # Get database instance
    database = get_database()

    # Starting device service
    grpc_service = DeviceService(database, port=service_port, max_workers=max_workers, grace_period=grace_period)
    grpc_service.start()
    while not terminate.wait(timeout=0.1): pass