Sequence Generator in Java for Unique Id

Question

I am planning to write a sequence generator which will be used in my REST resource implementation class during post to generate unique id. Since every post request is handl

Answer 1

If you are open to using String for IDs, instead of int, you might want to look into using UUID (Universally Unique Identifier). Very easy to use and as the name implies, they are unique. Here is an example of how to generate one:

// the value of uuid will be something like '03c9a439-fba6-41e1-a18a-4c542c12e6a8'
String uuid = java.util.UUID.randomUUID().toString()

A UUID also provides better security than int because with integers you can guess the next request ID by simply adding 1 to your request ID, but UUIDs are not sequential and chances of anyone guessing anyone else's request ID are pretty slim.