Thank Constin,that really helped. Are there any advantages of WARP over APJ? I mean why would I want to use one over the other?
Sam --- [EMAIL PROTECTED] wrote: > On Thu, 28 Mar 2002 [EMAIL PROTECTED] wrote: > > > Maybe I've not kept up on the docs enough but ... > > > > I do think this thread, highlights a general > confusion around tomcat. > > Over the last couple of years, there have been > many > > mod_jk/jk2/webapp/warp/?? implementations, ajp > versions etc, and even > > when the discussions are on the list, it's still > hard to be able to say > > (for lowly thread lurkers/tomcat users like > myself), tomcat X.x can use > > mod_??, on ajp?.? because they provide xyz.. > > The problem is I have no time and I'm not good at > writing docs. > > Mod_jk works on all web servers and with all tomcat > versions. Mod_jk2 > will do the same. > > The core of the confusion is the distinction between > "protocol", "API", > "implementation". > > A protocol is something like IIOP, RPC, HTTP. The > API is a set of > functions - for forwarding the request, getting > response, config, auth, > etc. > > Mod_jk is an implementation that supports multiple > communication > protocols and multiple APIs. Different versions of > tomcat also support > multiple protocols and APIs. > > There are 4 protocols we use: > - ajp12 ( in tomcat3.x, jserv ) > - ajp13 ( in tomcat3.x, tomcat4.x ) > - jni ( in tomcat3.x - and 4.x as soon as jk2 is > ready ) > - WARP ( in tomcat4.x ) > > There are several APIs: > - request forwarding APIs - usually one method > signature for each protocol > - configuration methods - in warp and what used to > be called ajp14 ( very > confusing, since it was a set of new methods > implemented with ajp13 > protocol ) > - auth, shutdown, etc - again 2 or 3 if you count > the 4.0 shutdown > protocol. > > And several implementations of those protocols: > - mod_jserv implements ajp12 > - mod_jk implements ajp12, ajp13, jni > - mod_jk2 implements ajp13 ( and one of my goals for > a future version is > to implement one 'real' protocol - a minimal subset > of RPC/XDR or IIOP or > similar ) ( with jni replaced with ajp13 - and > multiple channels - tcp, > unix, jni ) > - mod_webapp implements WARP > - tomcat3.x implements ajp12, ajp13, jni > - tomcat4.x - ajp13, WARP > > And several implementations of the APIs ( similar > matrix ). The basic > request forwarding APIs used in jk is common to all > servers and should be > fully interoperable. Extended APIs ( config, etc) > are supported only in > new versions of tomcat/jk. > > Load balancing is one extra feature in mod_jk and > mod_jserv, on top of the > forwarding API. > > > > Costin > > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > __________________________________________________ Do You Yahoo!? Yahoo! Greetings - send holiday greetings for Easter, Passover http://greetings.yahoo.com/ -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
