# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.

class Timeout(Exception):

  def __init__(self, message=None, underlying_exception=None):
    assert message or underlying_exception, \
        "Either 'message' or 'underlying_exception' must be provided"
    self.message = message
    self.underlying_exception = underlying_exception

  def __str__(self):
    return self.message or str(self.underlying_exception)