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.
This question is from Spring in Action by Craig Walls. The answer to your question is this is a point cut. The cryptic notation is AspectJ’s pointcut expression language. For further explanation I suggest you keep reading the book it is explained in 4.2.1 Writing Pointcuts