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From "Greg Wilkins (JIRA)" <...@geronimo.apache.org>
Subject [jira] Commented: (GERONIMO-2163) WADI Integration for Jetty
Date Thu, 14 Sep 2006 13:28:30 GMT
    [ http://issues.apache.org/jira/browse/GERONIMO-2163?page=comments#action_12434675 ] 
            
Greg Wilkins commented on GERONIMO-2163:
----------------------------------------

Jan and I went over the patch today and we are generally pleased with it.

I like the architecture of a generic geronimo session, extended to a wadi session and then
the jetty session manager just using the generic API.
I am a little concerned that the session API is not one of thosed proposed or discussed...
but hey... it has a working implementation so that is a huge start.
Jules will be happy that it captures the invocation concept as well... so everybody should
be happy with the basic approach.

Jan also said the refactoring in the builder was very much for the better.


> WADI Integration for Jetty
> --------------------------
>
>                 Key: GERONIMO-2163
>                 URL: http://issues.apache.org/jira/browse/GERONIMO-2163
>             Project: Geronimo
>          Issue Type: New Feature
>      Security Level: public(Regular issues) 
>          Components: Clustering
>            Reporter: Gianny Damour
>         Assigned To: Gianny Damour
>            Priority: Minor
>         Attachments: GERONIMO-2163-v3.patch, GERONIMO-2163-v3b.patch, GERONIMO-2163-v4-old.patch,
GERONIMO-2163-v4.patch, GERONIMO-2163-v5-partial.patch, GERONIMO-2163-v5-plus.patch, GERONIMO-2163-v6.patch,
GERONIMO-2163-v6b.patch, GERONIMO-2163-v6c.patch, geronimo-wadi-integration-preview.patch,
geronimo-wadi-integration-RTC.patch, geronimo.patch, setUpServers.tar.gz, wadi-geronimo-integration-preview.patch,
wadi.patch, wadi.zip
>
>
> Email sent to the dev@ list.
> Hi,
> I have been working on a second integration attempt of WADI and I am posting here a high-level
description of the current state of progress such that people can jump in.
> At this stage, this is a Jetty only attempt and I do believe that the same approach can
be applied for Tomcat. The current integration provides (very unreliable) HttpSession state
migration. It only works for a single Web-application; more effort is required on the WADI
side to support multiple Web-applications and this will not impact the integration piece of
code. I (more or less successfully) tested the integration with mod_proxy + mod_proxy_balancer
and mod_proxy + mod_rewrite in front of three Geronimo servers running the WADI demo web-app.
> The code changes are:
> * new module to capture some clustering contracts - geronimo-clustering: there Node,
SessionManager, Session and ClusteredInvocation are defined.
> * new module to provide a WADI implementation of the above - geronimo-clustering-wadi;
> * new module to capture clustering builder contracts - geronimo-clustering-builder: there
is only one interesting interface JettyClusteringBuilder. This later defines a couple of methods
to augment the environment of a Web module being built and add clustering specific GBeans;
> * new module to provide a WADI implementation of the above - Geronimo-clustering-builder-wadi;
and
> * geronimo-jetty-builder and geronimo-jetty are impacted to hook in clustering. These
two modules depend on geronimo-clustering and geronimo-clustering-builder and not on WADI
specific modules.
> Two new modules are added:
> * jetty-clustering- wadi: this module defines default WADI GBeans such as Dispatcher,
ReplicationManagerFactory, BackingStrategyFactory et cetera; and
> * jetty-clustering-builder-wadi: this module defines a builder to process Jetty DD and
add various GBeans to the module being built.
> I think that the implementation is flexible enough to plug in another clustering implementation
such as Kache.
> As a matter of fact, there are some severe reliability (e.g. locking issues) and integration
(only one Web-app can be clustered) issues, which need to be fixed. So, this work is not yet
ready to be RTC voted. Having said that, I have opened a JIRA such that people can have a
look to the integration.
> Thanks,
> Gianny

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