pyignite/constants.py

# 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.

"""
This module contains some constants, used internally throughout the API.
"""

import ssl


__all__ = [
    'PROTOCOLS', 'MAX_LONG', 'MIN_LONG', 'MAX_INT', 'MIN_INT',
    'PROTOCOL_BYTE_ORDER', 'PROTOCOL_STRING_ENCODING',
    'PROTOCOL_CHAR_ENCODING', 'SSL_DEFAULT_VERSION', 'SSL_DEFAULT_CIPHERS',
    'FNV1_OFFSET_BASIS', 'FNV1_PRIME',
    'IGNITE_DEFAULT_HOST', 'IGNITE_DEFAULT_PORT',
    'RHF_ERROR', 'RHF_TOPOLOGY_CHANGED', 'AFFINITY_DELAY', 'AFFINITY_RETRIES',
    'RECONNECT_BACKOFF_SEQUENCE',
]

PROTOCOLS = {
    (1, 7, 0),
    (1, 6, 0),
    (1, 5, 0),
    (1, 4, 0),
    (1, 3, 0),
    (1, 2, 0),
}

PROTOCOL_VERSION_MAJOR = 1
PROTOCOL_VERSION_MINOR = 7
PROTOCOL_VERSION_PATCH = 1

MAX_LONG = 9223372036854775807
MIN_LONG = -9223372036854775808
MAX_INT = 2147483647
MIN_INT = -2147483648

PROTOCOL_BYTE_ORDER = 'little'
PROTOCOL_STRING_ENCODING = 'utf-8'
PROTOCOL_CHAR_ENCODING = 'utf-16le'

SSL_DEFAULT_VERSION = ssl.PROTOCOL_TLSv1_2
SSL_DEFAULT_CIPHERS = ssl._DEFAULT_CIPHERS

FNV1_OFFSET_BASIS = 0x811c9dc5
FNV1_PRIME = 0x01000193

IGNITE_DEFAULT_HOST = 'localhost'
IGNITE_DEFAULT_PORT = 10800

# response header flags
RHF_ERROR = 1
RHF_TOPOLOGY_CHANGED = 2

AFFINITY_DELAY = 0.01
AFFINITY_RETRIES = 32

RECONNECT_BACKOFF_SEQUENCE = [0, 1, 1, 2, 3, 5, 8, 13]