class Fluent::Compat::SocketUtil::UdpHandler

def initialize(io, log, body_size_limit, callback)
  super(io)
  @io = io
  @log = log
  @body_size_limit = body_size_limit
  @callback = callback
end

def on_readable
  msg, addr = @io.recvfrom_nonblock(@body_size_limit)
  msg.chomp!
  @callback.call(msg, addr)
rescue => e
  @log.error "unexpected error", error: e
end