branch-1.2/ambari-agent/src/main/puppet/modules/hdp/lib/puppet/parser/functions/hdp_calc_xmn_from_xms.rb

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module Puppet::Parser::Functions
  newfunction(:hdp_calc_xmn_from_xms, :type => :rvalue) do |args|
    heapsize_orig_str = args[0].to_s
    xmn_percent = args[1].to_f
    xmn_max = args[2].to_i
    heapsize_str = heapsize_orig_str.gsub(/\D/,"")
    heapsize = heapsize_str.to_i
    heapsize_unit = heapsize_orig_str.gsub(/\d/,"")
    xmn_val = heapsize*xmn_percent
    xmn_val = xmn_val.floor.to_i
    xmn_val = xmn_val/8
    xmn_val = xmn_val*8
    xmn_val = xmn_val > xmn_max ? xmn_max : xmn_val
    xmn_val_str = "" + xmn_val.to_s + heapsize_unit
    xmn_val_str
  end
end