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# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Reference implementation for health checking in gRPC Python."""
import threading
import grpc
from grpc_health.v1 import health_pb2
from grpc_health.v1 import health_pb2_grpc
class HealthServicer(health_pb2_grpc.HealthServicer):
"""Servicer handling RPCs for service statuses."""
def __init__(self):
self._server_status_lock = threading.Lock()
self._server_status = {}
def Check(self, request, context):
with self._server_status_lock:
status = self._server_status.get(request.service)
if status is None:
context.set_code(grpc.StatusCode.NOT_FOUND)
return health_pb2.HealthCheckResponse()
else:
return health_pb2.HealthCheckResponse(status=status)
def set(self, service, status):
"""Sets the status of a service.
Args:
service: string, the name of the service.
NOTE, '' must be set.
status: HealthCheckResponse.status enum value indicating
the status of the service
"""
with self._server_status_lock:
self._server_status[service] = status
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