class Iuid

Public Class Methods

new(config_file=nil) click to toggle source

# File lib/iuid.rb, line 5
def initialize(config_file=nil)
  if config_file
    @config_file = File.expand_path(config_file)
  elsif File.exists?(def_config_file=File.expand_path('~/.iuid.yaml')) || File.exists?(def_config_file=File.expand_path('/etc/iuid.yaml')) 
    @config_file = def_config_file
  end
end

Public Instance Methods

create(name,category) click to toggle source

# File lib/iuid.rb, line 13
def create(name,category)
  unless (uid=get(name)).nil?
    return uid
  end

  set(name,next_uid(category))
end

delete(name) click to toggle source

# File lib/iuid.rb, line 25
def delete(name)
  cache.delete(name)
end

get(name) click to toggle source

# File lib/iuid.rb, line 21
def get(name)
  cache.fetch(name)
end

set(name,uid) click to toggle source

# File lib/iuid.rb, line 29
def set(name,uid)
  cache[name] = uid
  cache['_all_uids'] = (alluids | [ uid ])
  uid
end

Protected Instance Methods

next_uid(category) click to toggle source

# File lib/iuid.rb, line 37
def next_uid(category)
  raise "Category #{category} is not configured!" unless max_uid=categories[category]
  if (curr_uid = cache["_category_#{category}_curr_uid"]) || max_uid && alluids.include?(curr_uid=max_uid)
    uid=curr_uid + 1
    while alluids.include?(uid) 
      uid = curr_uid + 1
    end
    raise "Max uid is 4294967295" if uid > 4294967295
    if coll_category = categories.keys.find{|c| categories[c] > max_uid && uid >= categories[c] }
      raise "Next available uid (uid) collides with category #{coll_category}"
    end
  else
    uid = max_uid
  end
  cache["_category_#{category}_curr_uid"] = uid
  uid
end

Private Instance Methods

alluids() click to toggle source

# File lib/iuid.rb, line 60
def alluids
  cache.fetch('_all_uids',[])
end

build_cache() click to toggle source

# File lib/iuid.rb, line 68
def build_cache
  require 'moneta'
  lconfig = config
  Moneta.new(lconfig['adapter'], lconfig['adapter_options']||{})
end

cache() click to toggle source

# File lib/iuid.rb, line 56
def cache
  @cache ||= build_cache
end

categories() click to toggle source

# File lib/iuid.rb, line 64
def categories
  config['categories'] || {}
end

config() click to toggle source

# File lib/iuid.rb, line 74
def config
  @config ||= read_config
end

default_config() click to toggle source

# File lib/iuid.rb, line 87
def default_config
    require 'yaml'
    YAML.load(File.read(File.expand_path(File.join(File.dirname(__FILE__),'iuid','default_config.yaml'))))
end

read_config() click to toggle source

# File lib/iuid.rb, line 78
def read_config
  if @config_file.nil?
    default_config
  else
    raise "Configfile #{@config_file} does not exist!" unless File.exists?(@config_file)
    default_config.merge(YAML.load(File.read(@config_file)))
  end
end