Dear developer team and users,
I've been working the last two weeks (off and on) on a new and much simplified
deployment implementation
for Jetspeed-2 which builds mainly on official Servlet specification (2.3)
features.
See JIRA: http://issues.apache.org/jira/browse/JS2-210
I expect that with this solution, deployment for Application servers other than
Tomcat will become much easier
to implement and support.
I've got this working already beautifully on Tomcat 5 (5.0.28) and with a few
nice side-effects too:
- the Jetspeed-2 context isn't fixed at /jetspeed any more
- multiple layout portlet applications can be deployed/used at the same time
for both see:
http://issues.apache.org/jira/browse/JS2-182
http://issues.apache.org/jira/browse/JS2-172
- no more temporarily expanded wars in the java.io.tmpdir to workaround
classloading issues
- much quicker startup
To be honest, my refactoring isn't finished yet and some features currently
available will have to be
reimplemented (differently) like undeployment.
But....
I can't get the redeployment working flawlessly under Tomcat 4.1 (tested with
4.1.30 and 4.1.31).
Tomcat 4 won't always release certain jars in deployed applications when doing
an undeployment or redeployment while this
is no problem with Tomcat 5.0.
Furthermore, auto redeployment of war files isn't available at all in Tomcat 4:
you need to use the TomcatManager
to remove an existing application first (which sometimes fails) before a new
application can tried to be deployed
again.
And then, There are other serious problems with Tomcat 4 too like no separate
sessions for the portal and portlet applications
(which is a *serious* security breach and the foremost reason I myself won't
use Tomcat 4 for Portals anymore).
The Pluto Team won't even use Tomcat 5.0 anymore and require Tomcat 5.5.7 or
higher because Tomcat 5.0 also has a session bug
in which a Portlet Application and its Web application don't share the same
session when invoked independently
(as they should according to the portlet specification).
Both the development of Tomcat 4 and Tomcat 5.0 has largely come to an end,
except for really nasty bugs, but the onces I
described above aren't regarded as such by the Tomcat team :-(
Al in all, to me the question right now is: do we really, really need to keep
supporting Tomcat 4.
For my deployment refactorings it poses a problem I don't have time left to
further investigate (nor do I have any hope it
*can* be resolved). As long as we need to support Tomcat 4, I can't commit my
changes...
I'd like to hear from both team members and users who absolutely require Tomcat
4 support for Jetspeed-2 and why.
And, if there are no big objections, I'd like to vote on dropping Tomcat 4
support!
Please comment,
Ate
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