module PropertiesConfiguration

Simple class that loads properties from a file to override a hash with default properties. This is a useful thing to have in any application. To use: config=PropertiesConfiguration::loadConfiguration({

:my_property => 'value'

},[‘/etc/localstream/localstream.properties’])

puts config.my_property

Public Class Methods

loadConfiguration(config={}, locations=[]) click to toggle source

# File lib/properties_configuration.rb, line 30
def self.loadConfiguration(config={}, locations=[])
  hash=config
  if locations
    locations.each do | location |
      properties=load_properties(location)
      hash=hash.merge(properties)
    end
  end
  if java.lang.System
    # only works in jruby
    java.lang.System.getProperties.each do |k,v|
      hash[k]=v
    end
  end

  # create a new class and then return an instance of that class so that we can pretend our properties are actual fields
  Class.new do
    hash.each do |k,v|
      define_method k do
        return v.to_s
      end
    end
  end.new
end

load_properties(properties_filename) click to toggle source

# File lib/properties_configuration.rb, line 10
def self.load_properties(properties_filename)
  properties = {}
  if File.exists?(properties_filename)
    File.open(properties_filename, 'r') do | properties_file |
      properties_file.read.each_line do |line|
        line.strip!
        if (line[0] != ?# and line[0] != ?=)
          i = line.index('=')
          if (i)
            properties[line[0..i - 1].strip] = line[i + 1..-1].strip
          else
            properties[line] = ''
          end
        end
      end
    end
  end
  properties
end