Class: Hiera::Backend::Json_backend
- Inherits:
-
Object
- Object
- Hiera::Backend::Json_backend
- Defined in:
- lib/hiera/backend/json_backend.rb
Instance Method Summary collapse
-
#initialize(cache = nil) ⇒ Json_backend
constructor
A new instance of Json_backend.
- #lookup(key, scope, order_override, resolution_type, context) ⇒ Object
Constructor Details
#initialize(cache = nil) ⇒ Json_backend
Returns a new instance of Json_backend.
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# File 'lib/hiera/backend/json_backend.rb', line 4 def initialize(cache=nil) require 'json' Hiera.debug("Hiera JSON backend starting") @cache = cache || Filecache.new end |
Instance Method Details
#lookup(key, scope, order_override, resolution_type, context) ⇒ Object
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# File 'lib/hiera/backend/json_backend.rb', line 12 def lookup(key, scope, order_override, resolution_type, context) answer = nil found = false Hiera.debug("Looking up #{key} in JSON backend") Backend.datasources(scope, order_override) do |source| Hiera.debug("Looking for data source #{source}") jsonfile = Backend.datafile(:json, scope, source, "json") || next next unless File.exist?(jsonfile) data = @cache.read_file(jsonfile, Hash) do |data| JSON.parse(data) end next if data.empty? next unless data.include?(key) found = true # for array resolution we just append to the array whatever # we find, we then goes onto the next file and keep adding to # the array # # for priority searches we break after the first found data item new_answer = Backend.parse_answer(data[key], scope, {}, context) case resolution_type.is_a?(Hash) ? :hash : resolution_type when :array raise Exception, "Hiera type mismatch for key '#{key}': expected Array and got #{new_answer.class}" unless new_answer.kind_of? Array or new_answer.kind_of? String answer ||= [] answer << new_answer when :hash raise Exception, "Hiera type mismatch for key '#{key}': expected Hash and got #{new_answer.class}" unless new_answer.kind_of? Hash answer ||= {} answer = Backend.merge_answer(new_answer, answer, resolution_type) else answer = new_answer break end end throw :no_such_key unless found return answer end |