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Wayne Pascoe wrote:
> Q: I am still trying to install ApacheJserv-1.1.2 on Linux. I am trying to
> find the correct JSDK for this. I have searched java.sun.com for JSDK,
> JSDK2.0 and Java Servlet Development Kit. The only reference I found is to
> jsdk20-solaris2-sparc.tar.Z. Is this correct?
A: http://java.sun.com/products/ lists all Sun Microsystems' stuff. You will
be better off with one of the Linux versions, rather than this Sparc version
you mention.
> Q: ...why is there so much complexity involved in administering servers
> for java applications? We have several java developers in house, and I
> have to maintain a separate environment (and often server_ for each of
> them. Some are using Tomcat, some are using Jserv. Their applications
> won't run on each others servlet engines.
A: Tomcat supports Java Servlet 2.2 and JavaServer Pages 1.1 technologies
(see java.apache.org). Jserv is a pure servlet engine that works on any
"version 1.1 compliant" Java Virtual Machine (see supported platform for
more information on this topic) and may execute any Java servlet compliant
with version 2.0 (see java.apache.org).
All I know about Tomcat is that it's the new and improved version of JServ,
and much more; I don't know whether they can co-exist with a single Apache
Web server. Nor can I comment on whether there's anything JServ can do that
Tomcat can't, but certainly Tomcat can do things JServ can't. And as Tomcat
is the way of the future (no further development on JServ), you might want
to start planning to migrate all JServ activity to Tomcat.
> Q: Also, some people using JServ require one version of the java sdk /
> jdk. Why is this?
A: Apache JServ supports only version 1.1 of the JVM, and version 2.0 of the
SDK (see java.apache.org). It's fantastic and free software, so ... :)).
Speaking as a developer, I can promise you that we (maybe not all of us, but
most) will ask for everything we can think of. We don't expect to be given
all of it. It's reasonable for an administrator to mandate a standard
platform, and require a business case to justify any deviations. It's good
to get consensus from the development community on what the standards should
be ;).
But this is said without knowing your business. If you provide services for
different clients on different platforms, then you will be stuck with many
platforms in your own shop. Of course, you can make the informed
recommendation that your clients upgrade, but that may not be possible in
all instances. So, if you have to implement something on a given platform,
you should develop it on as similar a platform as you can - or it might fail
when migrated.
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