On Tue, 6 Mar 2001, Robson Ribas wrote:
> It is possible to write Apache modules with mod_jk (the original goal of
> mod_java) ? Besides the main use of mod_jk is interacting with Tomcat, the
> Ajpv13 protocol could be used to communicate with other programs, right ? If
> so, some description/documentation of the protocol would be fine.
Most people are using mod_jk as the adapter between tomcat and Apache,
using Ajpv13 protocol - same as mod_jserv was used.
But there is much more in mod_jk:
- support for pluggable protocols - ajp13 is just one of the many
communication protocols that can be implemented on top of mod_jk
- support for multiple web server - apache1.3, apache2.0, IIS, NES,
aolserver. Most of the code is common - i.e. one protocol will
automatically work on all of the servers.
- support for JNI - and that's the hard thing. You can run the Java VM in
the same process ( with Apache2.0 or any multi-threaded server ), and use
JNI as a communication protocol. That is 1/2 of mod_java.
The other half of mod_java is the ability to implement various server
hooks in java. This is not yet completed - but must of the code is there.
Tomcat is using the same extension mechanism as apache ( and very similar
with all other web servers ) - a number of hooks implemented by modules.
A tomcat interceptor acts and serve the same function as a native module -
what's missing is the ability to call hooks implemented by tomcat modules
from apache and to call apache hooks from tomcat.
For tomcat it is more important to use server modules ( authentication,
mapping ), but calling tomcat authentication modules to authenticate
static requests from apache is also important.
In other words - mod_jk + tomcat are a superset of mod_java ( the main
functionality and goal is certainly different, but the implementation is
based around the same ideas ).
Costin
>
> ----- Original Message -----
> From: <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, March 05, 2001 6:14 PM
> Subject: Re: Mod_java status
>
>
> > On Mon, 5 Mar 2001, Robson Ribas wrote:
> >
> > > What happened to mod_java ? There is no link to it on java.apache.org
> > > neither on jakarta.apache.org. Was this project closed or discontinued
> > > or something ?
> > >
> >
> > Most of it is implemented in mod_jk, part of tomcat 3.2 and 3.3.
> >
>
>
>
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