I usually use a counter entity bean. The entity bean's PK is a string, which uniquely names the counter. It has a method called, "getNextValue", which returns a long incrementing from zero. This may not be the fastest way, but it's very simple, and you will never get a duplicate (unless you've exhausted all 2^64 values.)
If wrap-around is a concern, you can always make it into a string, and append the date. This way, you'd have to use up all 2^64 values in one day before the value would repeat. Mike ----- Original Message ----- From: "Frank Morton" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, October 15, 2001 11:40 AM Subject: [JBoss-user] cmp primary key > I'm a newbie for sure, but I've been surfing around for > a solution to assigning unique primary key values with > CMPs. I have seen lots of vague descriptions of how > to do it and some specific ones that are all followed by > other comments from people why that solution doesn't > work. > > Does anyone have a specific solution and the complete > code to do this they can share? This seems like it must > be a very common problem that ought to have a standard > solution. > > Help. I'm really getting frustrated. > > Frank > > > > _______________________________________________ > JBoss-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-user > _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
