 what's jk? |
jk is a replacement to the elderly mod_jserv. it was a completely new tomcat-apache plug-in that handles the communication between tomcat and apache.
the newest jk2 is a refactoring of jk . the native part has been completly restructured and the configuration has been simplified a lot.
jk is more than just an apache module, since it could be used with majors webserver :
- mod_jk is an apache module to be used with apache 1.3 and 2.0 webservers.
- isapi is a redirector to be used with iis .
- nsapi is a redirector to be used with netscape/iplanet .
- dsapi is a redirector to to be used with domino .
| why should i use the jk? |
jk was develop to overcome many limitations of its ancestor, mod_jserv .
mod_jserv was too complex and because it was ported from apache/jserv, it brought with it lots of jserv specific bits that aren't needed by apache.
where mod_jserv supported only apache webservers on unix os, jk supports much more web servers and operating systems through via a compatibility layer named the jk library . the layered approach provided by the jk library makes it easier to support many different webservers and os.
jk offer better support for ssl, that's was a problem with mod_jserv which couldn't reliably identify whether a request was made via http or https.
jk can, using the newer ajpv13 protocol which relay many ssl informations required by servlet 2.2 and 2.3 specs.
jk offers a lot of different and flexible communications between a web server and the tomcat servlet engine and could be used today with all of the asf tomcat engines, 3.2.x , 3.3.x , 4.0.x , 4.1.x and 5.x
| what's the difference between jk and jk2? |
