Class ThreadLocalDateFormat

java.lang.Object
fc.util.ThreadLocalDateFormat
public final class ThreadLocalDateFormat extends Object
Useful to store thread-local date format instances. This class is intended for servlets/molly pages. Instead of static get/set methods, this class must be instantiated and the instance methods used to get/set the calendar object. This allows multiple instances of this class in the webapp, with each instance being able to get/set a separate calendar. [If the methods in this class were static, then only 1 calendar could be get/set per thread].

Each thread must remember to individually create a separate calendar instance and store it via the set method. The usage idiom is: 


//WebApp has a map of ThreadLocalDateFormat's and also a instance variable
//pointing to a default ThreadLocalDateFormat
ThreadLocalDateFormat mydf = WebApp.getThreadLocalDateFormat("foo");

if (mydf.isNull())  {
  mydf.set(DateFormat.getInstance());
  }

DateFormat df = mydf.get();
Note, the lines in red are always needed anywhere/anytime this class is used. (note, it just so happens that the DateFormat.getInstance() returns (at least for now) a new object every time it is called, which is why it is being used in the example above, else we would have to manually create a new DateFormat instance instead).