class Raindrops::Struct - raindrops - real-time stats for preforking Rack servers

# class Raindrops::Struct

This is a wrapper around Raindrops objects much like the core Ruby Struct can be seen as a wrapper around the core Array class. It's usage is similar to the core Struct class, except its fields may only be used to house unsigned long integers.

    class Foo < Raindrops::Struct.new(:readers, :writers)
    end

    foo = Foo.new 0, 0

    foo.incr_writers    -> 1
    foo.incr_readers    -> 1

### Public Class Methods

new(*members) click to toggle source

returns a new class derived from Raindrops::Struct and supporting the given `members` as fields, just like Struct.new in core Ruby.

    # File lib/raindrops/struct.rb, line 19
      def self.new(*members)
        members = members.map { |x| x.to_sym }.freeze
        str = <<EOS
    def initialize(*values)
      (MEMBERS.size >= values.size) or raise ArgumentError, "too many arguments"
      @raindrops = Raindrops.new(MEMBERS.size)
      values.each_with_index { |val,i| @raindrops[i] = values[i] }
    end

    def initialize_copy(src)
      @raindrops = src.instance_variable_get(:@raindrops).dup
    end

    def []=(index, value)
      @raindrops[index] = value
    end

    def [](index)
      @raindrops[index]
    end

    def to_hash
      ary = @raindrops.to_ary
      rv = {}
      MEMBERS.each_with_index { |member, i| rv[member] = ary[i] }
      rv
    end
    EOS

        members.each_with_index do |member, i|
          str << "def incr_#{member}; @raindrops.incr(#{i}); end; "               "def decr_#{member}; @raindrops.decr(#{i}); end; "               "def #{member}; @raindrops[#{i}]; end; "               "def #{member}=(val); @raindrops[#{i}] = val; end; "
        end

        klass = Class.new
        klass.const_set(:MEMBERS, members)
        klass.class_eval(str)
        klass
      end