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|
# frozen_string_literal: true
require 'singleton'
class RedisClient
class Cluster
class NormalizedCmdName
include Singleton
EMPTY_STRING = ''
def initialize
@cache = {}
@mutex = Mutex.new
end
def get_by_command(command)
get(command, index: 0)
end
def get_by_subcommand(command)
get(command, index: 1)
end
def get_by_name(name)
get(name, index: 0)
end
def clear
@mutex.synchronize { @cache.clear }
true
end
private
def get(command, index:)
name = extract_name(command, index: index)
return EMPTY_STRING if name.nil? || name.empty?
normalize(name)
end
def extract_name(command, index:)
case command
when String, Symbol then index.zero? ? command : nil
when Array then extract_name_from_array(command, index: index)
end
end
def extract_name_from_array(command, index:)
return if command.size - 1 < index
case e = command[index]
when String, Symbol then e
when Array then e[index]
end
end
def normalize(name)
return @cache[name] || name.to_s.downcase if @cache.key?(name)
return name.to_s.downcase if @mutex.locked?
str = name.to_s.downcase
@mutex.synchronize { @cache[name] = str }
str
end
end
end
end
|
