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Filename : unbounded_recurrence.py
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##
# Copyright (c) 2011-2017 Apple Inc. 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.
##

"""
Benchmark a server's handling of events with an unbounded recurrence.
"""

from uuid import uuid4
from itertools import count
from datetime import datetime, timedelta

from contrib.performance._event_create import (
    makeAttendees, makeVCalendar, measure as _measure)


def makeEvent(i, organizerSequence, attendeeCount):
    """
    Create a new half-hour long event that starts soon and weekly for
    as long the server allows.
    """
    now = datetime.now()
    start = now.replace(minute=15, second=0, microsecond=0) + timedelta(hours=i)
    end = start + timedelta(minutes=30)
    return makeVCalendar(
        uuid4(), start, end, "RRULE:FREQ=WEEKLY", organizerSequence,
        makeAttendees(attendeeCount))


def measure(host, port, dtrace, attendeeCount, samples):
    calendar = "unbounded-recurrence"
    organizerSequence = 1

    # An infinite stream of recurring VEVENTS to PUT to the server.
    events = ((i, makeEvent(i, organizerSequence, attendeeCount)) for i in count(2))

    return _measure(
        calendar, organizerSequence, events,
        host, port, dtrace, samples)