need some tips before to code my first double session scope app

[El...@lionbridge.com]

hi all,

i'd like some tips before to code the server part of a WebService (i use 
apache/tomcat, SOAP 2.2, and java for the code) 

i want to create a webservice where : the server part creates a session to 
2 databases (so one session per DB) and keep them alive (so i think i 
should use session scope in my DeploymentDescriptor but that's the only 
thing i know about it). 

then the client part of the web service, thanks to parameters, will have 
the choice between DB1 and DB2 (so session1 and session2) 


First of all, is it doable ? 

then could you tell me the main things i should know to create and keep 
alive those 2 sessions ? (because i only made for the moment a simple 
webservice with a client's request, and anwser and then everything is 
closed), so a brief summary of persistant session or a link to any doc 
would be appreciated

regards, 
Elise who whe hates WebServices 

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Lionbridge Technologies - France
www.lionbridge.com