def trace(level, message, nesting_level = 0)
if @@log_level >= level
if @@log_filename
if !@@log_device || @@log_device.closed?
@@log_device = File.open(@@log_filename, "a")
end
output = @@log_device
else
output = @@stderr_evaluator.call
end
location = caller[nesting_level].sub(/.*phusion_passenger\//, '')
location.sub!(/(.*):.*/, '\1')
now = Time.now
time_str = now.strftime("%Y-%m-%d %H:%M:%S.")
time_str << sprintf("%04d", now.usec / 100)
current_thread = Thread.current
if !(thread_id = current_thread[:id])
current_thread.to_s =~ /:(0x[0-9a-f]+)/i
thread_id = current_thread[:id] = $1 || '?'
end
if thread_name = current_thread[:name]
thread_name = "(#{thread_name})"
end
output.write("[ #{time_str} #{$$}/#{thread_id}#{thread_name} #{location} ]: #{message}\n")
output.flush
end
end