On Oct 28, 2008, at 11:55 PM, Doug Reeder wrote:
I have a small web application which uses JPA from the web tier
(i.e. I don't use any EJB). The Java application server needs to
run with as small a memory footprint as possible, since it will run
on a VPS with only 96 MB of memory.
The question is: Is it easier to start with Little-G and add the
necessary components, or start with the Java EE 5 Certified
configuration and disable unnecessary services?
Little-G appears to come configured to support JTA transactions, but
not JPA. There's a plugin for "Application-Managed JPA" at www.geronimoplugins.com
, but this only supports TopLink and RESOURCE_LOCAL transactions,
unlike the OpenJPA and JTA support in the Java EE 5 Certified
configuration. Is there documentation on how OpenJPA was
integrated into the Java EE 5 Certified configuration? I haven't
found anything at openjpa.apache.org nor cwiki.apache.org.
Neither? ;-) Well, definitely not by disabling services in an EE 5
server.
You should first create a plugin for your web application. Using this
plugin you can then create a custom server assembly using several
mechanisms:
1) build a customized server using maven and the car-maven-plugin -- http://cwiki.apache.org/GMOxDOC21/plugin-infrastructure.html#Plugininfrastructure-Assemblingaserverusingmaven
.
2) Generate a server from an existing server -- http://cwiki.apache.org/GMOxDOC21/plugin-infrastructure.html#Plugininfrastructure-Extractingaserverfromanexistingserver
.
3) Starting from a framework or minimal server and install the
application plugin (and any associated dependencies, e.g. JPA)
--kevan
