lib/mongo/monitoring/event/server_description_changed.rb
# frozen_string_literal: true
# rubocop:todo all
# Copyright (C) 2016-2020 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.
module Mongo
class Monitoring
module Event
# Event fired when a server's description changes.
#
# @since 2.4.0
class ServerDescriptionChanged < Mongo::Event::Base
# @return [ Address ] address The server address.
attr_reader :address
# @return [ Topology ] topology The topology.
attr_reader :topology
# @return [ Server::Description ] previous_description The previous server
# description.
attr_reader :previous_description
# @return [ Server::Description ] new_description The new server
# description.
attr_reader :new_description
# @return [ true | false ] Whether the heartbeat was awaited.
#
# @api experimental
def awaited?
@awaited
end
# Create the event.
#
# @example Create the event.
# ServerDescriptionChanged.new(address, topology, previous, new)
#
# @param [ Address ] address The server address.
# @param [ Integer ] topology The topology.
# @param [ Server::Description ] previous_description The previous description.
# @param [ Server::Description ] new_description The new description.
# @param [ true | false ] awaited Whether the server description was
# a result of processing an awaited hello response.
#
# @since 2.4.0
# @api private
def initialize(address, topology, previous_description, new_description,
awaited: false
)
@address = address
@topology = topology
@previous_description = previous_description
@new_description = new_description
@awaited = !!awaited
end
# Returns a concise yet useful summary of the event.
#
# @return [ String ] String summary of the event.
#
# @note This method is experimental and subject to change.
#
# @since 2.7.0
# @api experimental
def summary
"#<#{short_class_name}" +
" address=#{address}" +
# TODO Add summaries to descriptions and use them here
" prev=#{previous_description.server_type.upcase} new=#{new_description.server_type.upcase}#{awaited_indicator}>"
end
private
def awaited_indicator
if awaited?
' [awaited]'
else
''
end
end
end
end
end
end