class FMCache::IdKeyGen
Constants
- DEFAULT_KEY_PREFIX
Public Class Methods
new(prefix)
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@param [String, nil] prefix
# File lib/fmcache/id_key_gen.rb, line 6 def initialize(prefix) p = prefix || DEFAULT_KEY_PREFIX @prefix = "#{p}:" end
Public Instance Methods
to_id(key)
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@param [String] id @return [Integer]
# File lib/fmcache/id_key_gen.rb, line 31 def to_id(key) prefix_len = @prefix.size if key[0..(prefix_len-1)] == @prefix key[prefix_len..-1].to_i else raise "invalid key: #{key}" end end
to_ids(keys)
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@param [<String>] keys @return [<Integer>]
# File lib/fmcache/id_key_gen.rb, line 25 def to_ids(keys) keys.map { |key| to_id(key) } end
to_key(id)
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@param [Integer] id @return [String]
# File lib/fmcache/id_key_gen.rb, line 19 def to_key(id) "#{@prefix}#{id}" end
to_keys(ids)
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@param [<Integer>] ids @return [<String>]
# File lib/fmcache/id_key_gen.rb, line 13 def to_keys(ids) ids.map { |id| to_key(id) } end