# Copyright (c) 2023, NVIDIA CORPORATION. All rights reserved.
#
# 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.
from abc import ABC, abstractmethod
from nvflare.apis.event_type import EventType
from nvflare.apis.fl_component import FLComponent
from nvflare.apis.fl_context import FLContext
from nvflare.app_common.tracking.tracker_types import LogWriterName
from nvflare.app_common.widgets.streaming import ANALYTIC_EVENT_TYPE, AnalyticsSender
[docs]class LogWriter(FLComponent, ABC):
def __init__(self, event_type: str = ANALYTIC_EVENT_TYPE, metrics_sender_id: str = None):
super().__init__()
self.event_type = event_type
self.metrics_sender_id = metrics_sender_id
self.sender = None
self.engine = None
[docs] def handle_event(self, event_type: str, fl_ctx: FLContext):
if event_type == EventType.ABOUT_TO_START_RUN:
engine = fl_ctx.get_engine()
if self.metrics_sender_id:
self.sender = engine.get_component(self.metrics_sender_id)
if self.sender is None:
self.system_panic("Cannot load MetricsSender!", fl_ctx=fl_ctx)
self.sender.writer = self.get_writer_name()
else:
self.sender = AnalyticsSender(self.event_type, self.get_writer_name())
self.sender.engine = engine
[docs] @abstractmethod
def get_writer_name(self) -> LogWriterName:
pass