Here is an­oth­er ex­cel­lent ar­ti­cle about the cost of ap­pli­ca­tion servers, and why a par­a­digm shift is need­ed with lighter-weight al­ter­na­tives:

http://www.tom­ca­t­ex­pert.com/blog/2010/06/03/mi­grat­ing-jee-ap­pli­ca­tions-tom­cat-mo­ti­va­tion-mi­grat­ing

In­ter­est­ing note: the au­thor used to work at Bea, so he def­i­nite­ly knows what he is talk­ing about;-)

Check out http://www.tom­ca­t­ex­pert.com/blog/2010/07/07/how-mi­grate-jee-ap­pli­ca­tions-tom­cat for a nice dis­cus­sion on how to mi­grate from jee to a light-weight al­ter­na­tive like Tom­cat - with Atomikos for JTA if need­ed.

Check out this cool blog en­try on how this can all work to­geth­er.

DISCLAIMER: the sug­gest­ed so­lu­tion has not yet been ver­i­fied by Atomikos...

2018 UPDATE: the link seems to be bro­ken by now - apolo­gies for that.

Great news: we now have over 10K down­loads per month (as per Jan­uary 2010), which is quite im­pres­sive giv­en our niche mar­ket fo­cus. This is over 10 times more than 6 months ago... Atomikos keeps on grow­ing!

Here is an in­ter­est­ing post at JBoss about con­fig­ur­ing Hiber­nate, In­fin­is­pan's caching and Atomikos JTA (among oth­er JTA im­ple­men­ta­tions). Sam­ple code and con­fig­u­ra­tion files are in­clud­ed.

Re­gards