class Ougai::Formatters::Base

def initialize(app_name = nil, hostname = nil)
  @app_name = app_name || File.basename($0, ".rb")
  @hostname = hostname || Socket.gethostname.force_encoding('UTF-8')
  @trace_indent = 2
  @trace_max_lines = 100
end

def serialize_exc(ex)
  err = {
    name: ex.class.name,
    message: ex.to_s
  }
  if ex.backtrace
    err[:stack] = serialize_trace(ex.backtrace)
  end
  err
end

def serialize_trace(trace)
  sp = "\n" + ' ' * @trace_indent
  trace.slice(0, @trace_max_lines).join(sp)
end