Method names on "Client Request with Return" nodes

Question

I wasn't sure whether this question would be better here, or in the "integration"
group. The traffic there is somewhat lighter than in here, so perhaps someone
is more likely to read it here :) .
I have two questions about the "method name" in a "Client Request with Return"
node in a Java Process Definition. Apparently the method name is exposed in the
WSDL. I can sort of understand what this method name is used for in the "request"
node, but I fail to understand what the method name corresponds to in the "reply/response"
node of the pair of two nodes. Why does this need to expose a method name in
the WSDL when the point of the node is just to send back a response to the original
request?
Second, in the "Guide to Building Business Processes" document, in the section
titled "Naming the Methods on Client Request with Return Nodes" (page 3-14 in
my copy), the last sentence says "The name must be a valid Java class name".
Is this true? That confuses me.

Answer 1

What do you think is happening here? Specifically if a socket is a connected and a new one comes in. What then?
private void listen() {
          try {
               clientSocket = serverSocket.accept();
          } catch (IOException e) {
               e.printStackTrace();
     }