topic Re: Data migration in Alfresco Archive

Data migration

nizar — Fri, 05 Sep 2014 08:14:59 GMT

Hello all,I'm new in activiti and i want to know if i can migrate my data from one databasase to another . i m using activiti 5.11

Re: Data migration

martin_grofcik — Mon, 08 Sep 2014 04:30:46 GMT

Hi,

Yes, automatic and manual db schema upgrade is supported between activiti versions.

Regards
Martin

Re: Data migration

nizar — Mon, 08 Sep 2014 08:25:12 GMT

thx Martin ,
but my problem is that i added manually rows in my database , and i want to know if it will cause a collision or not in the future ,
So i have a doubt if activiti engine use the sequence to generate ids ?
i saw the function getNextId in DbIdGenerator but i did not undersand how activiti engine generate ids .

Re: Data migration

martin_grofcik — Tue, 09 Sep 2014 05:24:17 GMT

Hi Nizar,

There are 2 implementations of Id generators in activiti sources.
org.activiti.engine.impl.db.DbIdGenerator
org.activiti.engine.impl.persistence.StrongUuidGenerator

Based on configuration you can use one of them (or your own).
org.activiti.engine.impl.db.DbIdGenerator uses property table row next.dbid to get blocks of free ids. (org.activiti.engine.impl.cmd.GetNextIdBlockCmd)

Regards
Martin