CHAPTER 7Asynchronous Messaging
Messages are at the heart of an ESB, and OSB is no exception. Therefore, it's worthwhile to ensure you have a solid understanding of the principles of messages and invocation models. Much of this chapter is more specific to WebLogic Server than it is to OSB. It's important to know both sides of the "services equation," and creating WebLogic web services will figure prominently in your OSB work.
Synchronous messaging is by far the most common messaging model in use today. A synchronous call is one where the caller waits for the called operation to complete before the caller can take another action. Synchronous calls are often the norm because they're easier to understand and easier to perform ...