Now Undertow AccessLogHandler is not supported Response time(%D/%T), right?

I simply implemented it, but I'm not sure..

https://github.com/emag/undertow/commit/6401d61e3fcb5ce739ce4f30ae0d6fb3ad68cc37

My code is

1) Add startTime:long field in HttpServerExchange

2) Initialize startTime and assign System.currentTimeMillis to it in HttpServerExchange#<init> 

3) Create ResponseTimeAttribute and its readAttribute return (System.currentTimeMillis - exchage.getStartTime)

Is it too simple?

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I checked handler chain stack trace on WildFly Beta1.

 

[...]

 <Some Handlers> -> AccessLogHandler -> PathHandler -> ResourceHandler

If PathHandler and ResourceHandler(or another process) take a long time, my idea doesn't work.