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# Copyright (C) 2014-2017 MongoDB, Inc.
#
# 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.
require 'mongo/cluster/topology/replica_set'
require 'mongo/cluster/topology/sharded'
require 'mongo/cluster/topology/single'
require 'mongo/cluster/topology/unknown'
module Mongo
class Cluster
# Defines behaviour for getting servers.
#
# @since 2.0.0
module Topology
extend self
# The various topologies for server selection.
#
# @since 2.0.0
OPTIONS = {
replica_set: ReplicaSet,
sharded: Sharded,
direct: Single
}.freeze
# Get the initial cluster topology for the provided options.
#
# @example Get the initial cluster topology.
# Topology.initial(topology: :replica_set)
#
# @param [ Array<String> ] seeds The addresses of the configured servers.
# @param [ Monitoring ] monitoring The monitoring.
# @param [ Hash ] options The cluster options.
#
# @return [ ReplicaSet, Sharded, Single ] The topology.
#
# @since 2.0.0
def initial(seeds, monitoring, options)
if options.has_key?(:connect)
OPTIONS.fetch(options[:connect].to_sym).new(options, monitoring, seeds)
elsif options.has_key?(:replica_set)
ReplicaSet.new(options, monitoring, seeds)
else
Unknown.new(options, monitoring, seeds)
end
end
end
end
end
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