Melvin,
On 8/13/24 16:35, Baez, Melvin L wrote:
Hi all,
I’m reaching out to the community seeking assistance. I support Tomcat
from an infrastructure perspective and assist our developers with
migrating a set of existing applications from WebSphere and TomEE to
Tomcat as the application web server.
We are trying to come up with a streamlined process of helping
applications move to Tomcat, while accommodating their specific
requirements.
I’m looking for utilities, scripts, cheatsheets that can assist us.
Also, if there are other references of mapping libraries/jar files to
features that would be helpful.
I think here would be a great place to start:
https://tomee.apache.org/comparison.html
This will help you understand which applications need TomEE (and perhaps
additional components not already provided by one of their several
distributions) and which can be deployed on a vanilla Tomcat. Some
applications can probably be deployed on a
Tomcat-plus-a-small-number-of-support-libraries without requiring all of
TomEE. Your developers should be able to help with this decision.
As for migration... just copy the WAR file from WebSphere and drop it
into Tomcat's webapps/ directory and you should be good for the most
part..... except configuration. My brief experience with Java EE was
that each server seemed to have endless configuration that needed to be
done with the environment to support the application. If the application
relies on lots of container-provided resources such as JNDI, then you
will need to migrate that stuff by hand. The Tomcat team doesn't
maintain anything I know of that would help you migrate from WebSphere
configuration to Tomcat (or TomEE) configuration.
That said, most of this stuff ends up being XML-based, so if you have a
number of configurations to migrate, we could help you identify the kind
of configuration you will need in Tomcat/TomEE and you could write an
XSL transform to take your existing configuration and mutate it into
whatever is required for Tomcat/TomEE.
Hope that helps,
-chris
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