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Posted to dev@qpid.apache.org by "Alan Conway (Resolved) (JIRA)" <ji...@apache.org> on 2011/10/04 15:55:34 UTC
[jira] [Resolved] (QPID-2223) Controlling order of plug-in
initialization.
[ https://issues.apache.org/jira/browse/QPID-2223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alan Conway resolved QPID-2223.
-------------------------------
Resolution: Not A Problem
> Controlling order of plug-in initialization.
> --------------------------------------------
>
> Key: QPID-2223
> URL: https://issues.apache.org/jira/browse/QPID-2223
> Project: Qpid
> Issue Type: Improvement
> Components: C++ Broker
> Affects Versions: 0.5
> Reporter: Alan Conway
> Assignee: Alan Conway
> Priority: Minor
>
> The specific use case for this is as follows:
> The cluster plug-in needs to know in earlyInitialize whether or not the broker has a store so it can correctly advertise itself as persistent/transient when joining the cluster.
> The current solution is
> /**
> * Initialization order. If a plugin does not override this, it
> * returns DEFAULT_INIT_ORDER. Plugins that need to be initialized
> * earlier/later than normal can override initOrder to return
> * a lower/higher value than DEFAULT_INIT_ORDER.
> */
> QPID_COMMON_EXTERN virtual int initOrder() const;
> The cluster plugin sets a higher initOrder so it will initialize after the store and can test whether broker.getStore() is a null store.
> This feature was added without sufficient discussion. The goal of this JIRA is to determine if there's a better solution that would apply more generally. If so we'll implement that instead.
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