You will quickly learn how to implement your own processors, but it might take some time to do it right.

You must follow the rules that apply to stateless session beans, when implementing your own processor:

The process method must be thread-safe as it gets called from many concurrent threads.

We will start with an example of a processor that can be used as a very simple calculator. Each line of code of our example is explained in detail in the following sections so that you will understand the basic concepts of Projector.