Synchronizing non-thread-safe code

Gatling (Open-Source)
1

I need to do a SimpleDateFormat. My code looks like this:

println( ( new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss.SSSS" ) ).format( new Date() ) + "," + session( INDIVIDUAL_ID ).as[String] + "," + session( USER_NAME ).as[String] )

The docs for SimpleDateFormat says it is not thread safe. Since I am creating a new one every time, that probably doesn't matter, right?

But if I wanted to be more efficient, I could create the SimpleDateFormat object once, and then just reference it. But then I would need to synchronize access to the object, wouldn't I? What is the scala way of doing that?

2

What about using ThreeTen backport that we already ship and is threadsafe, instead of this old SimpleDateFormat crap?

Then, generally speaking, if you really have to use some non-thread-safe parser, the best practice is to use a ThreadLocal, as we use just a few threads.

3

I’m trying to find an example of how to do this ( and things like it ) using ThreeTen, as suggested. Specifically, I have need of getting today’s date in the format of YYYY-MM-DD, and just the year, as YYYY.

I’m not having a lot of luck. I look up ThreeTen, and all I find is how to create a date object (of various flavors). I try going to the JavaDocs, and I get a 404 error. So I can’t find any sample code for how to go from the date object to a string with a well defined format. Maybe a documentation deficiency?

Anybody have a working documentation link, or a snippet of sample code that I can use, preferably that includes the import line required to compile it? :slight_smile:

4

http://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html

5

Thanks!