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from concurrent import futures
import grpc
from interdomain.service.InterdomainServiceServicerImpl import InterdomainServiceServicerImpl
from interdomain.Config import GRPC_SLICE_PORT, GRPC_MAX_WORKERS, GRPC_GRACE_PERIOD
from interdomain.proto.interdomain_pb2_grpc import add_InterdomainServiceServicer_to_server
from grpc_health.v1 import health
from grpc_health.v1 import health_pb2
from grpc_health.v1.health_pb2_grpc import add_HealthServicer_to_server
from common.logger import getJSONLogger
LOGGER = getJSONLogger('interdomainservice-server')
LOGGER.setLevel('DEBUG')
BIND_ADDRESS = '0.0.0.0'
class InterdomainService:
def __init__(self, address=BIND_ADDRESS, slice_client=None, port=GRPC_INTERDOMAIN_PORT, max_workers=GRPC_MAX_WORKERS,
grace_period=GRPC_GRACE_PERIOD):
self.address = address
self.slice_client = slice_client
self.port = port
self.endpoint = None
self.max_workers = max_workers
self.grace_period = grace_period
self.monitoring_servicer = None
self.health_servicer = None
self.pool = None
self.server = None
def start(self):
# create gRPC server
self.server = grpc.server(futures.ThreadPoolExecutor(max_workers=self.max_workers)) # ,interceptors=(tracer_interceptor,))
# add monitoring servicer class to gRPC server
self.interdomain_servicer = InterdomainServiceServicerImpl()
add_InterdomainServiceServicer_to_server(self.interdomain_servicer, self.server)
# add gRPC health checker servicer class to gRPC server
self.health_servicer = health.HealthServicer(
experimental_non_blocking=True, experimental_thread_pool=futures.ThreadPoolExecutor(max_workers=1))
add_HealthServicer_to_server(self.health_servicer, self.server)
# start server
endpoint = '{}:{}'.format(self.address, self.port)
LOGGER.info('Listening on {}'.format(endpoint))
self.server.add_insecure_port(endpoint)
self.server.start()
self.health_servicer.set('', health_pb2.HealthCheckResponse.SERVING) # pylint: disable=maybe-no-member
LOGGER.debug('Service started')
def stop(self):
LOGGER.debug('Stopping service (grace period {} seconds)...'.format(self.grace_period))
self.health_servicer.enter_graceful_shutdown()
self.server.stop(self.grace_period)
LOGGER.debug('Service stopped')