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# 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
#
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# distributed under the License is distributed on an "AS IS" BASIS,
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import json


class FaultSpec(object):
    """
    The base class for a fault specification.

    MAX_DURATION_MS         The longest duration we should use for a fault specification.
    """

    MAX_DURATION_MS=10000000

    def __init__(self, start_ms, duration_ms):
        """
        Create a new fault specification.

        :param start_ms:        The start time in milliseconds since the epoch.
        :param duration_ms:     The duration in milliseconds.
        """
        self.start_ms = start_ms
        self.duration_ms = duration_ms

    def message(self):
        """
        Return a message suitable for sending to the Trogdor daemon.
        """
        raise NotImplemented

    def __str__(self):
        return json.dumps(self.message())