cowtowncoder/java-uuid-generator

Absolute value time based generator

bluemarker1 opened this issue · 4 comments

bluemarker1 commented

Are there any consequences to taking the absolute value of:
Generators.timeBasedGenerator().generate()?

bluemarker1 commented

@cowtowncoder any thoughts?

cowtowncoder commented

Consequences like... ? You mean whether instance you get should be explicitly reused, or just always calling static accessor?

So: method will always construct a new generator instance; and when not passing EthernetAddress, a pseudo-address needs to be generated as well. So there is definitely some overhead in calling that method. Whether it really matters depends on usage: with light usage (like, at most a hundred per second or so), probably not very significant.

On the other hand, it should be safe to simply get an instance, store it as a static singleton (or ThreadLocal, if you prefer), and reuse. This if usage rate is high enough.

bluemarker1 commented

Is there any negative in taking the absolute value of the uuid big integer?

cowtowncoder commented

I don't understand the question here.