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From Joachim Müller (JIRA) <jetspeed-...@portals.apache.org>
Subject [jira] Created: (JS2-893) cluster synchronization feature
Date Mon, 07 Jul 2008 20:28:31 GMT
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
            Reporter: Joachim Müller
             Fix For: 2.1.2, 2.1.3, 2.2


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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