How to initialize data?

There is a legacy Java application that has to be migrated into portal. As a first step of this process the application has to be split into 3 portlets. All of them are going to be part of the same home page of community.
This legacy application has initialization process that supposed to be executed when user login into the portal and render home page for community. As result of initialization process some data (Java objects) will be stored in remote http session. All portlets belong the same WAR file so there is no problem to share this data between all of them.
As I understand when portal render the page these portlets will be call asynchronous. So every portlet who needs this initialization data is responsible to check session and initialize them if these data are not there. Because the rest of the portlets also need this data it will introduce locking/unlocking mechanism for this http session object.
So my question is: does portal has any way to help solve this issue or this one is entire application responsibility?
Originally I was thinking that PEI may help somehow but it doesn't look like this.
Any ideas?
Thank you.
Edited by Bryazgin at 04/30/2007 9:04 AM

What is your question? You need them to go in order one at
a time?I guess my question was how to have initialization data in remote http session (shared over 3 different portlets) BEFORE portal begins render a page and actually make calls to remote server?
"Go in order" may be one of the solution, but I don't think Aqualogic supports this functionality, and there is no really needs for this because, imho, this approach kind of against of Aqualogic architecture.
"Delay" is pretty much the some as locking/unlocking in sense that implementation has to be done on application level (I don't see any options to introduce delay through portal Web Service UI).

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