50 lines
1.8 KiB
Python
50 lines
1.8 KiB
Python
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from concurrent import futures
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from contextlib import contextmanager
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from multiprocessing import Lock
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import grpc
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import logging
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from .device import DeviceException
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from .proto import sma_pb2 as pb2
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from .proto import sma_pb2_grpc as pb2_grpc
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class StorageManagementAgent(pb2_grpc.StorageManagementAgentServicer):
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def __init__(self, addr, port):
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self._devices = {}
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self._server = grpc.server(futures.ThreadPoolExecutor(max_workers=1))
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self._server.add_insecure_port(f'{addr}:{port}')
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pb2_grpc.add_StorageManagementAgentServicer_to_server(self, self._server)
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def _grpc_method(f):
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def wrapper(self, request, context):
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logging.debug(f'{f.__name__}\n{request}')
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return f(self, request, context)
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return wrapper
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def register_device(self, device_manager):
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self._devices[device_manager.name] = device_manager
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def run(self):
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self._server.start()
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self._server.wait_for_termination()
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def _find_device(self, name):
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return self._devices.get(name)
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@_grpc_method
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def CreateDevice(self, request, context):
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response = pb2.CreateDeviceResponse()
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try:
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manager = self._find_device(request.WhichOneof('params'))
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if manager is None:
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raise DeviceException(grpc.StatusCode.INVALID_ARGUMENT,
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'Unsupported device type')
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response = manager.create_device(request)
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except DeviceException as ex:
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context.set_details(ex.message)
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context.set_code(ex.code)
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except NotImplementedError:
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context.set_details('Method is not implemented by selected device type')
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context.set_code(grpc.StatusCode.UNIMPLEMENTED)
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return response
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