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From "Ioannis Canellos (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (KARAF-1125) Cellar events should include all the information required for the processing of the event.
Date Sat, 24 Dec 2011 12:08:30 GMT

     [ https://issues.apache.org/jira/browse/KARAF-1125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Ioannis Canellos updated KARAF-1125:

    Component/s: cellar-core
> Cellar events should include all the information required for the processing of the event.
> ------------------------------------------------------------------------------------------
>                 Key: KARAF-1125
>                 URL: https://issues.apache.org/jira/browse/KARAF-1125
>             Project: Karaf
>          Issue Type: Improvement
>          Components: cellar-core
>            Reporter: Ioannis Canellos
>            Assignee: Ioannis Canellos
> When an event is processed in Cellar most of the time a lookup to the distributed registry
is required.
> I can see a couple of issues with this approach:
> i) Unnecessary access to the distributed resources. 
> ii) The state of the group is only in memory and is not persisted anywhere.
> iii) Having the state in the distributed memory its not easy to view the state of a group.
> I think that we should not use distributed memory as registry at all. Each event should
contain all the information required for its processing and those information should be persisted
locally on each node (configuration admin / fileinstall).
> The only thing that maybe needs to be addressed, is what happens when a new node joins
a group. I am thinking that it should not be really hard to send something like "request group
config" command and then just process the result.

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