gistfile1.txt

require 'msgpack'

class MessagePackedString < String
  def to_msgpack(out = '')
    out << self
  end
end

def log(tag, record)
  r = {}
  record.each_pair {|k,v|
    r[k] = v.to_msgpack(MessagePackedString.new) rescue v.to_s
  }
  r.to_msgpack
end

log "test", {"a"=>1, "b"=>2}
log "test", {"a"=>1, "b"=>2}