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Re: Configuration
Well depends of the setup.
For example sometimes i use tomcat standalone (not with apache +
mod_jk), so if you want to define an error page you add this to xml:
<error-page>
<error-code>404</error-code>
<location>/404.html</location>
</error-page>
Also you can define error 5xx (servlet errors) that apache would not
handle anyway.
Also most of the time if you do use apache with pass through to tomcat,
you would tell apache that everything in a context (ie: /servelts/) is
to be handled (passed to) tomcat, so if something is missing in there
apache won't handle the 404 since it delegated all to tomcat.
other things i use myself:
<display-name>Viewlet Central</display-name>
<description>
Viewlet Central
</description>
<session-config>
<session-timeout>600</session-timeout>
</session-config>
Other than that the rest i don't use much.
Per servlets option i don't use but it's definitely something i think
could be useful.
As for XML, i agree with you and that is what i don't like with XML, a
huge, very slow, memory hungry parser to read 5 key values :-) but if
you start to add parameters, etc ... to each servlets definition then it
might be best ...
Doesn't C++ have some light weight XML parser ? you really don't need a
full blown one, just something to read attributes/values.
Ilya A. Volynets-Evenbakh wrote:
Nah.. CPPSERV doesn't claim to support "standards", it claims to have
API losely based on that of J2EE Servlet API ;-)
This means we can (and probably will) invent config format of our own.
In fact XML parser is the last thing I want to
hook up to this engine - it will automatically add dependancy on libs
that are at least ~1.5 M in size. Not something I
want to have in embedded device.
BTW, what do you mean by defining error pages? Isn't that done by
Apache? (ErrorDocument in .htaccess or apache.conf)
So, config-wise - we have session timeouts, "application definitions" -
i.e. set of related servlets sharing ServletContext and
session name. I guess adding per-servlet parameters should be reasonable
(think multiple instances of same servlet
hooked to different databases, etc).
Anything else?
Thibaut Colar wrote:
Besides servlets definitions ?
not: much, most common i define is error pages (404)
and also very useful is session timeout.
Have rarely used anything else, i f any.
I'm not a big fan of the web.xml myself.
1) it's xml ... so you know :-)
2) it needs both the definitions, and then the mapping, and on most
java containers it needs all the definitions first, followed by all
the mappings, so it's annoying to edit (2 places). But i guess it's
an implementation issue so you don't have to make yours stupid like
this :-)
But, i guess you gotta make the web.xml regardless cause it's "standard"
Ilya A. Volynets-Evenbakh wrote:
I'm thinking about configuration of servlets right now.
Ideas on what exactly should be configurable?
Should I perhaps use web.xml config format?
Question to those who program a lot of servlets:
What things have you ever actually configured in real life?
All ideas are welcome.