The whole Date class in Java is not thread safe. We considered swapping to 
JodaTime and I know DCB was working on it, but im not sure from the top of my 
head if he ever committed / merged what he was working on...

Cheers, Tim

On 11 Jan 2010, at 20:10, aw wrote:

> See:  http://java.sun.com/javase/6/docs/api/java/text/SimpleDateFormat.html
> ---------------
> Synchronization
> 
> Date formats are not synchronized. It is recommended to create
> separate format instances for each thread. If multiple threads access
> a format concurrently, it must be synchronized externally.
> ---------------
> 
> 
> Since SimpleDateFormat is not thread-safe, do I potentially have a bug
> when using TimeHelpers?
> 
> For example, see the Chat.scala example -- see "line" where it binds
> "when" -> hourFormat(c.when)...  Is there a potential problem there
> that multiple threads will be running the snippet and accessing the
> same underlying SimpleDateFormat?
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