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.
The Web Services FAQ, which is linked in my signature, has links to articles on how to use JAX-RPC handlers. Whether the handler performs logging or something else makes no difference (the details on how to log would of course differ on the client and the server).