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https://issues.apache.org/jira/browse/IGNITE-1108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14651866#comment-14651866
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Vladimir Ozerov commented on IGNITE-1108:
-----------------------------------------
Last point - I would rather move all plugins start/stop callbacks invocation
into IgnitePluginProcessor. This will allow to have a consistent list of all
started plugins in one place for consistent start/stop behavior, instead of
adding plugins as a separate components to IgniteKernal as we do that now.
> Additional lifecycle callbacks in PluginProvider interface.
> -----------------------------------------------------------
>
> Key: IGNITE-1108
> URL: https://issues.apache.org/jira/browse/IGNITE-1108
> Project: Ignite
> Issue Type: Task
> Components: general
> Affects Versions: 1.1.4
> Reporter: Vladimir Ozerov
> Assignee: Nikolay Tikhonov
> Priority: Critical
> Fix For: ignite-1.4
>
> Attachments: ignite-1108.patch
>
>
> Currently plugins are started at the very end of start process, and they are
> stopped before all other components.
> This is a problem because sometimes we need to stop plugin AFTER all other
> components. not BEFORE. E.g. consider a plugin which provides an environment
> for custom cache store, and this store has "write-behind" enabled. In this
> case we will stop plugin before write-behind store flushed all data what
> leads to unexpected behavior.
> It seems that we must provide more callbacks so that plugins could be
> notified both before and after all other components are started/stopped.
> Proposed design:
> 1) Start:
> - PluginProvider.onBeforeStart() - called from IgnitePluginProcessor.start();
> - PluginProvider.start() - already exists, unchanged;
> - PluginProvider.onAfterStart() - just rename onIgniteStart() for consistency
> with onBeforeStart();
> 2) Stop procedure is mirrored from start: onBeforeStop(), stop(),
> onAfterStop().
> 3) Introduce PluginProviderAdapter where methods will be no-op. This way user
> plugins will continue compile in case of further changes to PluginProvider
> interfaces provided that method names are unchanged.
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