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Contents
class Hiera
module Backend
class Json_backend
def initialize(cache=nil)
require 'json'
Hiera.debug("Hiera JSON backend starting")
@cache = cache || Filecache.new
end
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
end
end
end
Version data entries
95 entries across 95 versions & 2 rubygems