12.1. A brief introduction to JMS

Much like the remoting mechanisms and REST interfaces we’ve covered so far in this part of the book, JMS is all about applications communicating with one another. JMS differs from those other mechanisms in how information is transferred between systems.

Remoting options such as RMI and Hessian/Burlap are synchronous. As illustrated in figure 12.1, when the client invokes a remote method, the client must wait for the method to complete before moving on. Even if the remote method doesn’t return anything back to the client, the client will be put on hold until the service is done.