System.currentTimeMillis() | Sleep Less Than One Millisecond

The issue was with the following code snippet:

MyEntity a = new MyEntity();
        a.setUid("foo" + System.currentTimeMillis());
        a.setName("my entity");
        entityService.save(a);

As a general rule of thumb, it is a bad idea to rely on currentTimeMillis() to have a millisecond-resolution on windows, especially if you are using it to generate unique things like file names or db IDs. Looks like System.nanoTime() might tick faster.

Here are some links I found on StackOverflow about this:

• Sleep Less Than One Millisecond
• In JavaScript, is there a source for time with a consistent resolution in milliseconds?
• How does any application (chrome, flash, etc) get a time resolution better then the system time resolution?