Questions about Apache Portable Runtime on Tomcat 5.5.x

[Allen Young <al...@gmail.com>]

Hi all,

I've used tomcat for quite a long time but not until last week did I notice
the APR stuff. Since I don't quite understand a few things, I want to ask
your folks.

First, how can I use APR on a windows install version of tomcat 5.5.x. I've
found several tutorials about setting APR, all of which are about adding
something in catalina.bat. As you can see, windows install version doesn't
have that file but do contains a tcnative-1.dll file in the "bin" directory.
So how can I use APR on a windows install version? Or it has been
automatically used already?

Second, according to my understanding, APR will increase the rendering speed
of static web pages remarkably. So why not all the tomcat distributions open
APR setting automatically?

Thanks for answering.



Allen

Re: Questions about Apache Portable Runtime on Tomcat 5.5.x

[Markus Schönhaber <ma...@schoenhaber.de>]

Allen Young wrote:

> First, how can I use APR on a windows install version of tomcat 5.5.x. I've
> found several tutorials about setting APR, all of which are about adding
> something in catalina.bat. As you can see, windows install version doesn't
> have that file but do contains a tcnative-1.dll file in the "bin"
> directory. So how can I use APR on a windows install version? Or it has
> been
> automatically used already?

tcnative-1.dll in Tomcat's bin directory should be enough to make Tomcat use 
it.
If you're not sure whether or not the native DLL is actually loaded, look at 
catalina.out. If Tomcat couldn't find the DLL it will log a message similar 
to
29.12.2006 16:31:10 org.apache.catalina.core.AprLifecycleListener 
lifecycleEvent
INFO: The Apache Tomcat Native library which allows optimal performance in 
production environments was not found on the java.library.path: [...]
(if you didn't comment the AprLifecycleListener in server.xml).

Moreover, the class names for the Protocol handlers differ between APR and 
non-APR. Without APR loaded you'll see something like

29.12.2006 16:31:10 org.apache.coyote.http11.Http11BaseProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080

in catalina.out. With APR this will look like

23.07.2006 15:34:47 org.apache.coyote.http11.Http11AprProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080

Regards
  mks

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