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From "Randy Watler (JIRA)" <jetspeed-...@portals.apache.org>
Subject [jira] Resolved: (JS2-893) cluster synchronization feature
Date Wed, 29 Apr 2009 06:11:30 GMT

     [ https://issues.apache.org/jira/browse/JS2-893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Randy Watler resolved JS2-893.

       Resolution: Fixed
    Fix Version/s: 2.1.4

PAM implementations are now capable of successfully rolling back and retrying portlet application
registrations in both the 2.2 trunk and 2.1.3-POST branch, (to be 2.1.4).

Fixes included adding retry loop in startPortletApplication APIs and cleaning up prefs cache
in the 2.1.3-POST branch. The 2.2 trunk has a new prefs/registry implementation that did not
require any improvements based on the need to recover successfully from failed registrations.

2.1.3 svn commit: 769669
2.2 svn commit: 769670

The new service proposed as a fix for these problems was not encorporated. A new JIRA issue
should be created to donate the service into the 2.2 and/or 2.1.4 if that is still desired.

> cluster synchronization feature
> -------------------------------
>                 Key: JS2-893
>                 URL: https://issues.apache.org/jira/browse/JS2-893
>             Project: Jetspeed 2
>          Issue Type: New Feature
>          Components: Other
>    Affects Versions: 2.1.2, 2.1.3, 2.2.0
>            Reporter: Joachim Müller
>            Assignee: Randy Watler
>             Fix For: 2.1.4, 2.2.0
>         Attachments: JS2-893_patch.zip
> We developed a cluster synchronization feature that is able to synchronize the execution
of an objects method cluster-wide. The approach is similar to the spring transaction proxy,
so we are able to AOP-inject the cluster synchronization via spring configuration. The component
is highly customizable. A new database table is used for synchonization, but any other data
container (i.e. broadcast-distributed-hashmap) could be used.
> One main application for this functionality is the start of many jetspeed cluster nodes
and synchronize the deployment of the PAs to the database. (Even with the VersionedApplicationManager
we experienced DB constraints failures on startup with fresh database, preventing the some
PAs from registration.)
> Patch follows (exists only for the 2.1.2-POSTRELEASE branch yet).

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