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#
#

# Copyright (C) 2014 Google Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""Module for the WConfd protocol

"""

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import logging
import random
import time

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import ganeti.rpc.client as cl
import ganeti.rpc.stub.wconfd as stub
from ganeti.rpc.transport import Transport
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from ganeti.rpc import errors
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class Client(cl.AbstractStubClient, stub.ClientRpcStub):
  """High-level WConfD client implementation.

  This uses a backing Transport-like class on top of which it
  implements data serialization/deserialization.

  """
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  def __init__(self, timeouts=None, transport=Transport, allow_non_master=None):
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    """Constructor for the Client class.

    Arguments are the same as for L{AbstractClient}.

    """
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    cl.AbstractStubClient.__init__(self,
                                   timeouts=timeouts,
                                   transport=transport,
                                   allow_non_master=allow_non_master)
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    stub.ClientRpcStub.__init__(self)
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    retries = 12
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    for try_no in range(0, retries):
      try:
        self._InitTransport()
        return
      except errors.TimeoutError:
        logging.debug("Timout trying to connect to WConfD")
        if try_no == retries -1:
          raise
        logging.debug("Will retry")
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        time.sleep(try_no * 10 + 10 * random.random())