This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I have below questions for persisting data in following situations.
1.If my j2ee system has web layer and enterprise application layer then which are the best ways for transferring session from web layer to application layer?
2. What are the challanges that we may face in multi clustered environment and which could be the best solutions for those?(something like if one app server goes down then how could we shift to the next app server transparent to the users).