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# Copyright 2017, Google LLC
#
# 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.
"""Private helpers for futures."""
import logging
import threading
_LOGGER = logging.getLogger(__name__)
def start_daemon_thread(*args, **kwargs):
"""Starts a thread and marks it as a daemon thread."""
thread = threading.Thread(*args, **kwargs)
thread.daemon = True
thread.start()
return thread
def safe_invoke_callback(callback, *args, **kwargs):
"""Invoke a callback, swallowing and logging any exceptions."""
# pylint: disable=bare-except
# We intentionally want to swallow all exceptions.
try:
return callback(*args, **kwargs)
except Exception:
_LOGGER.exception("Error while executing Future callback.")
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