Yep, all depends on the number of potential collisions you care about. In semi-controlled environments you can make do with fewer bits of uniqueness.
tb On Aug 19, 2011, at 1:13 PM, Jesse Tayler wrote: > how about those modern looking bit.ly type id's ? > > seems like you can take the key or counter value and mod your way through a > set of characters and build up a super-short id - no? > > I have ERRest doing my work right now, but I'll be wanting to email URLs to > the web app and figured I'd prefer not to show id's but rather could use a > counter like bit.ly urls and I haven't yet looked into that. > > Thoughts? Ideas? Suggestions? > > > > On Aug 19, 2011, at 1:04 PM, Travis Britt wrote: > >> You're close to a real uuid at that point. The common problem is multiple >> instance coordination, can be a lot easier just to have the DB assign a >> unique value since you're probably coordinating there anyway. But it all >> depends on your app, your db, your scaling characteristics, how many >> potential collisions you're willing to risk…. >> >> http://download.oracle.com/javase/1.5.0/docs/api/java/util/UUID.html >> >> tb >> >> On Aug 19, 2011, at 12:14 PM, Jesse Tayler wrote: >> >>> Hi Travis- >>> >>> Is it impractical? >>> >>> I've used a simple date+rand constructor and ran it through an encoding to >>> HEX to get a 'random' object id and had no troubles with that. I suppose it >>> has limits to uniqueness in theory but it was quick to generate. >>> >>> I was also about to start looking for something more short, like bit.ly >>> urls ? More like a mod-counter with a nice set of case-sensitive characters. >>> >>> I was just about to ask if someone know's of a good slice of code or method >>> to do just that so I could adopt something more modern? >>> >>> I figured for certain WO URLs it might be clean and won't expose id >>> ordering in a URL so I'd write an apache rule or two and use an object-id >>> like the die above? Not smart? >>> >>> On Aug 19, 2011, at 8:15 AM, Travis Britt wrote: >>> >>>> Unless you're generating a true guid that's impractical to do in a general >>>> way at the app level. >>>> >>>> tb >>>> >>>> On Aug 19, 2011, at 8:03 AM, Kevin Hinkson wrote: >>>>> This should be a common issue then. So I'm surprised there isn't some >>>>> kind of slug generator that handles ensuring uniqueness in Wonder. (or is >>>>> there?) >>>> >>>> _______________________________________________ >>>> Do not post admin requests to the list. They will be ignored. >>>> Webobjects-dev mailing list ([email protected]) >>>> Help/Unsubscribe/Update your Subscription: >>>> http://lists.apple.com/mailman/options/webobjects-dev/jtayler%40oeinc.com >>>> >>>> This email sent to [email protected] >>>> >>> >> > _______________________________________________ Do not post admin requests to the list. They will be ignored. Webobjects-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/webobjects-dev/archive%40mail-archive.com This email sent to [email protected]
