... course.Example 4-8 shows the code.Figure 4-2 . The snooped parametersExample 4-8 . Unlocking KeyedServerLockimport java. io.*;import java. net.*;import java. util.*;import javax.servlet.*;import javax.servlet.http.*;public ... a server-sideinclude counter and a chain-based counter, respectively.*Example 4-1 1. A generic counter superclassimport java. io.*;import java. util.*;import javax.servlet.*;import javax.servlet.http.*;public ... Headers:Connection: Keep-AliveIf-Modified-Since: Saturday, 13-Jun-98 20:50:31 GMT; length=297User-Agent: Mozilla/4.05 [en] (X11; I; IRIX 6.2 IP22)Host: localhost:8080Accept: image/gif, image/x-xbitmap,...