This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
As all of you know Spring is a very good competitor to EJB.
My question is does Spring support concurrency?
Because Spring encourages to configure Spring beans as Singletons. With Singleton Services (Spring Beans) how spring handles concurrency? If spring doesnt support concurrency how it became a competitor to EJB?