Module: Norikra::UDF

Defined in:
lib/norikra/udf.rb

Defined Under Namespace

Classes: AggregationSingle, SingleRow

Class Method Summary collapse

Class Method Details

.listup ⇒ Object 



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# File 'lib/norikra/udf.rb', line 97

def self.listup
  return unless defined? Gem

  plugins = Gem.find_latest_files('norikra/udf/*.rb')
  plugins.each do |plugin|
    begin
      debug "plugin file found!", file: plugin
      rbpath = plugin.dup
      4.times do
        rbpath = File.dirname( rbpath )
      end
      files = Dir.entries( rbpath )
      gemname = files.select{|f| f=~ /\.gemspec$/ }.first.sub(/\.gemspec$/, '')
      trace "Loading UDF gem", gemname: gemname, path: plugin
      require gemname
      load plugin
    rescue => e
      warn "Failed to load norikra UDF plugin", plugin: plugin.to_s, error_class: e.class, error: e.message
      e.backtrace.each do |t|
        warn "  " + t
      end
    end
  end

  known_consts = [:SingleRow, :AggregateSingle]
  udf_bases = [Norikra::UDF::SingleRow, Norikra::UDF::AggregationSingle]
  udfs = []
  self.constants.each do |c|
    next if known_consts.include?(c)

    klass = Norikra::UDF.const_get(c)
    if klass.is_a?(Class) && udf_bases.include?(klass.superclass)
      udfs.push(klass)
    elsif klass.is_a?(Module) && klass.respond_to?(:plugins)
      udfs.push(klass)
    end
  end
  udfs
end